What is Demurrage in Shipping?

Demurrage: Legal Meaning and Commercial Function

Demurrage is one of the most important financial mechanisms in a voyage charter. It begins with a simple commercial idea: the charterer is given an agreed period of Laytime for loading and discharge, and if that period is exceeded for reasons not falling on the shipowner, a fixed daily or hourly sum becomes payable. In practice, however, Demurrage is much more than a late fee. It is a negotiated allocation of delay risk, a substitute for proving day-by-day market loss, and a central part of the economic balance between freight, port exposure and ship availability.

The modern legal treatment of Demurrage is that it operates as liquidated damages for the charterer’s failure to complete cargo operations within the permitted Laytime. Older authorities sometimes described it as a contractual payment for further use of the ship, but the dominant modern view treats the expiry of Laytime as a breach, with Demurrage providing the agreed measure of compensation. This distinction matters because it affects the treatment of exceptions clauses, mitigation arguments, additional damages and the moment when the charterer’s exposure begins.

The commercial value of a Demurrage Clause is certainty. Without such a clause, the shipowner would have to prove the loss caused by detention, including the value of the lost employment and the reasonableness of the claimed period. With an agreed Demurrage rate, the parties avoid much of that evidential burden. The charterer knows in advance the daily cost of exceeding Laytime, while the shipowner knows the minimum contractual compensation payable if the ship is kept beyond the agreed time allowance.

The definition used in modern laytime materials, including the Voylayrules 1993, reflects this practical approach. Demurrage is described as an agreed amount payable to the owner in respect of delay beyond Laytime where the owner is not responsible. That formulation also states an important rule: ordinary Laytime exceptions do not normally apply once Demurrage has begun unless the charterparty clearly says otherwise. This is the foundation of the familiar expression, once on Demurrage, always on Demurrage.

The legal authorities show an evolution from the older concept of paid detention toward the present doctrine of liquidated damages. Lockhart v. Falk, Harris v. Jacobs, Lilly v. Stevenson, Steel, Young & Co v. Grand Canary Coaling Co, Inverkip Steamship Co v. Bunge & Co, The Spalmatori, Dias Compania Naviera SA v. Louis Dreyfus Corporation and The Lips each contributed to the development of the modern analysis. The essential point is now clear: the obligation to pay Demurrage is contractual, but its legal nature is damages for the continuing breach created by detention after Laytime has expired.

Demurrage as Liquidated Damages 

The older language of Demurrage as payment for the use of the ship can be misleading. A voyage charter does not operate in the same manner as a time charter. Under a time charter, the charterer obtains broad control over the employment of the ship for a period. Under a voyage charter, the charterer receives transport for a particular cargo between agreed places, with a defined or calculable time allowance for cargo operations. Demurrage does not convert the voyage charter into a temporary hire arrangement; Demurrage compensates the Shipowner for the Charterer’s failure to complete within the agreed time.

Lord Brandon’s analysis in The Lips is often treated as the clearest modern statement. Demurrage is not consideration for a contractual right to keep the ship longer. It is a liability in damages, quantified in advance by the agreed daily or hourly rate. The charterer’s breach continues until loading or discharge is completed and the ship is released for further commercial employment. This approach explains why Demurrage usually accrues de die in diem, that is, from day to day, once Laytime has been exhausted.

This does not mean that every delay after Laytime automatically produces the full claim demanded by the Shipowner. The Shipowner must still bring the case within the charterparty, prove the expiry of Laytime, and show that the relevant period is not excluded by an applicable clause or by Shipowner’s fault. But once those conditions are satisfied, the owner does not normally need to prove the actual loss suffered on each day of delay. The parties have already priced the detention risk through the Demurrage clause.

The distinction between debt and damages can also affect interest, limitation, mitigation and the possibility of recovering additional damages. Although Demurrage is often invoiced and settled like a debt in commercial practice, the underlying legal liability remains a damages liability unless the contract clearly creates some different payment structure. This is why the wording of the charterparty remains decisive and why courts are cautious when asked to treat Demurrage as a flexible or equitable remedy rather than a bargained contractual allocation.

When Demurrage Begins and How Long It Continues

Demurrage normally begins at the moment Laytime expires. If Laytime is expressed in days, hours, weather working days or another agreed unit, the calculation must first establish when the allowed time has been used. Only after that point can the ship be said to be on Demurrage. In most ordinary cases, Demurrage then continues as running time until the relevant cargo operation is completed, subject to any express clause reducing, suspending or excluding it.

Older cases raised the question whether Demurrage without a stated maximum period could run only for a reasonable time, after which damages for detention would replace it. That approach has not survived as the modern rule. Where the charterparty states a Demurrage rate but no maximum period, Demurrage generally continues until loading or discharge is complete, unless the contract is brought to an end by frustration, accepted repudiation or some other legal event that displaces the charterparty obligation.

Inverkip Steamship Co v. Bunge & Co is central to this analysis. The Court of Appeal rejected the notion that the court should impose a second reasonable period after Laytime. Scrutton LJ pointed out the practical difficulty of asking what counts as a reasonable degree of unreasonable delay. The better view is that the owner cannot abandon the charter merely because Demurrage has run for a substantial period. The Shipowner must show repudiation, final refusal to perform, frustration of the commercial adventure or another legally sufficient ground.

This is commercially important. If a ship is delayed at a congested discharge port for weeks after Laytime expires, the Shipowner may be frustrated by losing follow-on employment, but the charterer’s liability remains measured by the agreed Demurrage Rate unless another actionable breach is established. The bargain may be a good one or a bad one in retrospect, but the court does not rewrite the Demurrage Rate simply because the market value of the ship has changed.

Where a Charterparty provides a limited number of Demurrage Days, the position may be different. Some older forms allowed a specified number of days on Demurrage and then treated further detention as damages for detention. Modern charters more commonly state a rate without a fixed outer limit. The drafting choice is therefore crucial. If the parties intend Demurrage to end after a stated number of days, and a different remedy to apply thereafter, the clause should say so expressly.

Rate, Units and Practical Calculation of Demurrage

Demurrage may be expressed as a daily rate, an hourly rate, a rate per running day pro rata, or by reference to a published scale such as Worldscale in tanker trades. The unit used by the charterparty determines how the calculation is performed. A clause providing for a daily rate without pro rata wording can produce a different result from one that expressly allows calculation for part of a day. The distinction may be significant where the excess period is only a few hours.

The traditional rule is strict. Unless the charterparty allows apportionment of a day, the Shipowner may be entitled to a full day’s Demurrage even where only part of a day is used. Commercial Steamship Co v. Boulton and South Australian Voluntary Wheat Pool v. Owners of the Riol illustrate the point. Modern forms usually avoid the harshness of that rule by stating that Demurrage is payable per day and pro rata for part of a day, or per running hour and pro rata.

The wording also affects whether Demurrage runs on ordinary calendar days or on the same type of days used for Laytime. Once Demurrage has begun, the ordinary position is that it runs continuously. Sundays, holidays, bad weather periods and other Laytime exceptions cease to matter unless the charterparty specifically extends an exception to Demurrage. Therefore, a Weather Working Day (WWD) Laytime regime does not automatically mean that Demurrage is calculated only by Weather Working Days.

In tanker practice, Demurrage is often expressed by reference to Worldscale-related figures, or by a negotiated daily rate tied to the size and earning capacity of the ship. In bulk trades, the rate is often stated directly in dollars per day. In both settings, the rate should be reviewed alongside freight, port rotation, expected terminal performance, local congestion risk and the probability that documentary time bars will apply. A low freight rate with a high Demurrage Rate may allocate risk differently from a high freight rate with a modest Demurrage rate.

Worldscale and Tanker Demurrage

The tanker market developed Worldscale as a standard reference system to compare freight economics across different routes and ship sizes. Although Worldscale is primarily a freight scale, tanker charterparties frequently use Worldscale concepts when identifying standard voyage economics and Demurrage exposure. The scale is based on a nominal reference ship and publishes rates that allow parties to negotiate at a percentage of the listed figure.

Where Demurrage is linked to Worldscale, the size of the ship may be decisive. A Demurrage rate based on the deadweight category of the nominated ship is different from a rate calculated by reference to the quantity of cargo actually loaded. If the charterparty does not provide otherwise, tanker practice generally treats the ship’s size and the agreed form as the guide. This approach reflects the fact that Demurrage compensates for the commercial detention of the ship, not simply for the amount of cargo in the tanks.

Worldscale also matters because tanker voyages often involve complex port operations: multiple grades, shore line restrictions, heating requirements, pumping warranties, crude oil washing, stripping, ship-to-ship operations and documentary evidence from terminals. The Demurrage rate is only one part of the calculation. The more difficult issues often arise from deciding whether all time counts, whether half-rate Demurrage applies, whether the ship breached a pumping warranty, or whether terminal restrictions prevented the ship from performing at the warranted rate.

A professionally drafted tanker Demurrage Clause should therefore be read together with the Laytime Clause, Notice of Readiness (NOR) provision, pumping warranty, cargo heating clause, half-rate Demurrage clause and time bar clause. These provisions operate as a single commercial code. Treating the Demurrage rate in isolation often leads to disputes because the rate only tells the parties how much is payable once the relevant time has been identified.

Demurrage Payment, Settlement and Interest

Although Demurrage accrues as the delay continues, it is usually calculated and paid after completion of the voyage. The owner prepares a claim using the Statement of Facts (SOF), Notices of Readiness (NOR), loading and discharge logs, pumping records, letters of protest, port documents and other supporting materials. Charterers then review whether the claim is properly documented, whether exceptions apply, and whether the arithmetic reflects the charterparty.

The word settlement can create difficulty. In some contexts, settlement means agreement or calculation rather than immediate payment. The Lips, The Pearl Merchant and The Antclizo (No 2) show why the drafting must be precise. If the parties intend payment to be made by a particular date after completion of discharge or after receipt of documents, the charterparty should say payment, not merely settlement. If the clause is intended only to establish a period for review and agreement, the word settlement may be sufficient but less certain.

Interest on Demurrage depends on the governing law, the contract, the arbitration rules or the court’s powers. If the charterparty states that Demurrage is payable within a defined period after presentation of a valid claim, interest may run from expiry of that period. If payment is not contractually due until documents have been supplied, the owner must make sure that the required package is complete. A weak documentary package can delay payment or defeat the claim entirely if a time bar applies.

In substantial delays, especially in tanker or bulk trades where the ship remains trapped for a long period, Shipowners may consider interim relief or an interim award if the charter provides for arbitration and part of the claim is undisputed. Such relief is not automatic. Tribunals are more likely to assist where liability is clear, the arithmetic is capable of verification and the amount claimed is not dependent on unresolved issues of fact.

Additional Damages Beyond Demurrage

The starting point is that Demurrage is the agreed compensation for detention after Laytime has expired. Therefore, a Shipowner cannot usually recover additional damages simply because the actual financial loss exceeds the agreed rate. If the market rises sharply, or if the Shipowner loses a profitable follow-on fixture, that loss is normally absorbed by the Demurrage bargain. The agreed Demurrage Rate may later appear too low, but that is not a reason for replacing it with damages at large.

The authorities draw an important line. Additional Damages may be recoverable where the Shipowner proves a breach separate from the failure to load or discharge within Laytime, or proves a loss different in character from detention. Aktieselskabet Reidar v. Arcos Ltd remains the classic example. Delay at the loading port caused the ship to lose the ability to load to a deeper summer mark, producing a Deadfreight claim for cargo that could no longer be carried. The loss was not merely loss of use of the ship; it concerned the quantity of cargo carried on the voyage.

Suisse Atlantique is the leading authority against converting ordinary delay into additional damages. The shipowners argued that because charterers delayed operations during a long-term voyage charter arrangement, fewer voyages were performed and the Shipowners lost freight. The courts rejected the claim. The loss complained of was still the loss of use of the ship during detention, and that type of loss was covered by the Demurrage Clause. The fact that the charterers may have acted commercially to reduce the number of voyages did not create a separate recoverable head of loss.

The Bonde refined the principle. To recover beyond Demurrage, the owner must demonstrate that the additional loss is different in character from loss of use and that it stems from breach of an additional or independent obligation. This approach prevents Demurrage from becoming meaningless. If every consequence of delay could be repackaged as a separate loss, the agreed rate would no longer serve its commercial purpose.

In practice, additional damages may be arguable where there is a guaranteed completion date, a failure to load a full and complete cargo, shipment of prohibited or dangerous cargo causing a distinct operational consequence, or instructions that create an independent breach. Even then, the Shipowner must give credit for Demurrage already recovered if the same period of delay is involved. The law does not permit double recovery for the same loss.

Deadfreight, Short Loading and Demurrage Interaction

Deadfreight and Demurrage often appear together because both arise from the charterer’s cargo obligations. Deadfreight compensates the Shipowner for freight lost when the charterer fails to load the agreed quantity. Demurrage compensates the Shipowner for detention beyond Laytime. The two claims may coexist, but the calculation must avoid overcompensation. If a short shipment reduces loading or discharge time, that benefit may need to be brought into account when calculating the owner’s net loss.

The Ionian Skipper illustrates the point. Where a charterer ships less cargo than required, the prima facie Deadfreight claim is the freight that would have been earned on the missing quantity. However, benefits obtained by the owner because of the short shipment may have to be deducted. If the ship became available earlier, if Despatch was affected, or if Demurrage increased or decreased because less cargo was handled, those matters may be relevant to the final calculation.

The Altus raised a more specialised tanker problem. Where the Demurrage rate itself depends on the amount of cargo loaded, a charterer who short-loads may try to benefit from paying Demurrage at a lower rate. The court was prepared to prevent the charterer from taking advantage of its own failure to supply the contractual cargo. The owner was allowed to recover the difference associated with the rate that would have applied if the required quantity had been loaded.

The practical drafting lesson is straightforward. If the parties want Deadfreight, Demurrage and Despatch consequences to be calculated on the contractual cargo quantity rather than the actual shipped quantity, the charterparty should say so. If the parties intend actual quantities to control, that should also be stated. Ambiguity can create complex accounting disputes even when liability in principle is obvious.

Mitigation, Actual Loss and Commercial Reasonableness

Because Demurrage is Liquidated Damages, the Shipowner is generally not required to prove actual loss. Nor is the Shipowner normally under a broad duty to restructure the voyage to reduce the charterer’s Demurrage exposure. The charterer agreed the rate and accepted the risk of delay beyond Laytime. This does not mean that owner conduct is irrelevant, but it does mean that the ordinary mitigation analysis is narrower than in an unliquidated damages claim.

New York arbitration in The Antalya illustrates the commercial issue. Charterers argued that Shipowners should have accepted an alternative discharge port that would have reduced Demurrage. The tribunal rejected the argument on the facts. A Shipowner is not normally obliged to accept a material alteration to the contractual adventure merely because it would be cheaper for the charterer. A different conclusion might be possible where the owner refuses a trivial or risk-free step that would plainly avoid unnecessary delay, but that is not the normal case.

There are cases where owners have recovered reasonable expenses incurred to reduce Demurrage. In Leeds Shipping Co Ltd v. Duncan, Fox & Co Ltd, additional payments to stevedores were allowed because they saved more Demurrage than they cost. Cazalet v. Morris also supports recovery where the Shipowner spends money to reduce a delay for which the charterer would otherwise be liable. These cases do not create a general duty to mitigate Demurrage, but they show that commercially sensible expenditure may be reimbursable where it benefits the charterer and reduces the claim.

The position may differ in some American decisions where actual loss has played a greater role, particularly in part cargo cases. English law is more contractual. If the agreement makes Demurrage payable and the relevant contract is treated separately, the absence of actual loss does not normally defeat the claim. This is especially significant in multiple charter or parcel cargo situations, where the ship may be working for other cargo interests while one charterer’s Laytime or Demurrage continues to run.

Default of the Shipowner

The Charterer is not liable for Demurrage caused by the shipowner’s own fault or by matters for which the Shipowner is contractually responsible. The principle applies both during Laytime and after Demurrage has begun. The difficulty is identifying whether the owner’s conduct actually deprived the charterer of the use of the ship for the relevant cargo operation or whether the delay would have occurred in any event.

If the ship is not ready, if cargo gear fails, if the owner’s servants obstruct operations, or if the Shipowner gives instructions inconsistent with the charterer’s rights, time may stop or the owner may be unable to recover Demurrage for the affected period. The analysis is fact-sensitive. It is not enough for the charterer to point to some owner-side irregularity; the irregularity must be causally connected to the delay or to the charterer’s inability to perform the relevant operation.

The Stolt Spur is controversial because it suggests a broader principle: a ship unavailable for the charterer’s cargo operation may be treated as preventing that operation even if cargo work for other interests is taking place. Some earlier authorities appear more favourable to Shipowners where charterers were not actually impeded. The tension reflects the commercial reality of parcel trades, where a ship may be partly available and partly committed at the same time.

In voyage charter analysis, the charterer does not control the whole ship in the same way as a time charterer. The charterer receives the right to carry a specified cargo, and, in part cargo trades, that right may coexist with other charterers’ rights. For that reason, Shipowner use of another part of the ship does not necessarily mean the first charterer has suffered a relevant deprivation. The decisive question is whether the first charterer’s cargo operation was prevented or delayed by the Shipowner’s conduct rather than by the port, terminal or charterer’s own arrangements.

Default of Charterers and Clauses Referring to Default

Charterers sometimes attempt to soften the Demurrage obligation by adding wording such as Demurrage is payable only if detention occurs by default of the charterer or the charterer’s agents. Such wording may appear to require moral fault, negligence or personal blame. English authorities, however, have generally interpreted default in this context as breach of contract, not necessarily negligence. If the charterer undertook to load or discharge within Fixed Laytime and failed to do so, that failure is itself the relevant default unless an exception protects the charterer.

Kokusai Kisen Kabushiki Kaisha v. Wm H Muller & Co (Inc), Argonaut Navigation Co v. Ministry of Food and The Amstelmolen show the reluctance of courts to let general default language undermine the Fixed Laytime bargain. If Fixed Laytime is agreed, the charterer assumes the risk that cargo, labour, berths and local arrangements will be available, except where the charterparty provides otherwise. A clause requiring default will not usually convert that absolute obligation into a negligence-based one.

The Amstelmolen is particularly useful because Pearson J analysed whether default meant moral fault or simply breach. The conclusion was that detention beyond specified Laytime is a breach, and therefore a default, unless the delay is caused by an excepted risk or by the Shipowner’s breach. This approach maintains the commercial certainty of fixed Laytime and prevents charterers from arguing that they are not responsible simply because the delay was caused by congestion, shortage of rail wagons, local labour problems or other external circumstances.

Parties can, of course, draft a clause that genuinely restricts Demurrage to culpable delay, or excludes liability for specified events outside the charterer’s control. But the wording must be clear. General language referring to default is unlikely to be enough if it conflicts with the structure of a fixed Laytime charter. The clearer solution is to identify the specific events that suspend Laytime or reduce Demurrage and to state expressly whether the protection continues after Laytime expires.

Exceptions Clauses and the Rule Once on Demurrage, Always on Demurrage

The maxim once on Demurrage, always on Demurrage is often quoted, but it should not be applied mechanically. It means that exceptions which protect the charterer during Laytime do not normally protect the charterer once Demurrage has begun, unless the charterparty clearly extends those exceptions to Demurrage. The reason is that the charterer is already in breach by failing to complete within Laytime, and clear words are needed before that continuing liability is interrupted.

The rule does not prevent the parties from agreeing otherwise. A clause may state that Demurrage shall not accrue during strikes, breakdowns, storms, government restraint or other specified events. It may reduce Demurrage to half rate. It may suspend the running of time altogether. The question is always one of construction: did the parties use language strong enough to affect the post-Laytime position? Ambiguous wording is generally resolved against the charterer seeking to escape Demurrage.

Saxon Ship Co Ltd v. Union Steamship Co Ltd, Rederi Aktiebolaget Transatlantic v. La Compagnie Française des Phosphates de L’Océanie, The Spalmatori and The Dias form the core line of authority. In The Dias, fumigation time did not count against Laytime, but the clause did not clearly suspend Demurrage once Laytime had expired. The House of Lords therefore held that Demurrage continued to accrue during fumigation. The result may appear strict, but it reflects the policy that post-Laytime exceptions require express wording.

The John Michalos is sometimes cited as an unusual case where a clause not expressly mentioning Demurrage was held to protect charterers after Laytime. Later authorities have treated that decision cautiously and largely confined it to its own wording. The safer drafting lesson is obvious: if charterers want protection after Demurrage begins, the clause should use the word Demurrage and specify whether the effect is suspension, reduction or exclusion.

The rule also explains why words such as time not to count can be insufficient. Time may mean Laytime only. If the ship is already on Demurrage, there may be no Laytime left to count or not count. A clause intended to affect Demurrage should avoid shorthand and state directly that the relevant period shall not count as time on Demurrage, or that Demurrage shall not accrue during the relevant period.

Half-Rate Demurrage in Tanker Charters

Tanker charter forms often adopt a middle position between full liability and complete exemption. Certain events do not stop Demurrage but reduce it, commonly to one-half of the agreed rate. Clause 8 of the Exxonvoy 69 and Asbatankvoy forms is a typical example, dealing with events such as fire, explosion, storm, strike, lockout, stoppage or restraint of labour, and breakdown of machinery or equipment in or about the plant of the charterer, supplier, shipper or consignee.

The half-rate mechanism is commercially sensible. It recognises that some delays are neither wholly the charterer’s commercial risk nor wholly outside the Demurrage bargain. The ship is still detained, but the cause is a specified event that the parties have chosen to treat more leniently. The clause must be applied by identifying both the event and the period of delay caused by that event. It is not enough to show that a listed event occurred somewhere in the background.

The Notos considered how half-rate wording interacts with provisions excluding liability for events beyond charterers’ control. The preferred view is that, where the clause specifically lists an event as giving rise to half-rate Demurrage, the half-rate provision applies even if the event is beyond charterers’ control. Otherwise the listed half-rate events would be deprived of much of their function. The contractual structure therefore matters: specific half-rate events are not automatically displaced by general no-control wording.

Breakdown cases show how technical these disputes can become. The Thanassis A treated damage to a jetty caused by collision and partial destruction as something more than breakdown of equipment. The Afrapearl took a broader approach to a leaking discharge pipeline, holding that a pipeline can be equipment and that it breaks down when it fails to function as a pipeline because of excessive leakage. The result turned not on abstract labels but on the practical function of the equipment in the discharge operation.

Storm, Severe Weather and Causation

Storm clauses create recurring difficulty because the ordinary commercial expression bad weather is not the same as a storm. In London practice, storm has often been associated with the Beaufort Scale and storm-force wind conditions. In New York arbitration, the approach has sometimes been less rigid, focusing on whether the weather caused an unusual commotion or disturbance in the port. This difference can produce materially different financial outcomes.

The wording by reason of storm introduces causation. The Charterer must show that the Demurrage was incurred because of the storm, not merely that poor weather existed during the relevant period. If the berth was unavailable for unrelated congestion, or if the terminal would not have worked for another reason, the weather may not be the operative cause. Conversely, if the port closes because storm conditions make operations unsafe, the causal link may be easier to establish.

The Tsukuba Maru is significant because the umpire, himself a master mariner, used a Beaufort-based approach. Although the later court proceedings did not finally settle the definition of storm for all purposes, the case illustrates the attraction of a nautical meaning. If the parties intended a broader weather exception, they could have used words such as weather and sea conditions, severe weather or adverse weather. Some later forms did exactly that.

Drafting should reflect the intended commercial risk. A terminal may stop work because of swell, lightning, port closure, wind limits for arms and cranes, or safety rules that fall below a strict storm threshold. If charterers want half-rate Demurrage for such conditions, the clause should not rely only on the word storm. If Shipowners want a narrow exception, a strict storm formulation may be appropriate.

Notice of Readiness (NOR) After Demurrage Has Started

Notice of Readiness (NOR) is the formal gateway to Laytime at the first loading port and, where the charterparty requires it, at later loading or discharge ports. The Notice of Readiness (NOR) tells the charterer that the ship has reached the contractual destination and is ready to perform the cargo operation. Once the ship is already on Demurrage, however, a different question arises: does a fresh Notice of Readiness (NOR) or a fresh notice period have to be satisfied before Demurrage resumes or continues at the next port?

The general answer is no, unless the charterparty clearly provides otherwise. R Pagnan & Fratelli v. Tradax Export SA is a leading authority. Donaldson J held that a notice clause referring to the commencement of Laytime had no application where no Laytime remained. If the ship arrived at the discharge port already on Demurrage, the common law rule applied and Demurrage ran from arrival at the relevant contractual destination, subject to the nature of the charter as a port or berth charter.

The Tsukuba Maru applied a similar approach in the tanker context. A six-hour notice period that would normally delay the start of Laytime did not postpone Demurrage where the ship arrived already on Demurrage. Later forms, such as Exxonvoy 84, dealt with the issue expressly by requiring Notice of Readiness (NOR) whether the ship was still on Laytime or already on Demurrage. That drafting demonstrates that the default position can be displaced, but only by clear words.

This issue is especially important in multi-port voyages. If the ship exhausts Laytime at the loading port and then proceeds to discharge, charterers may attempt to rely on discharge port Notice of Readiness (NOR) provisions to suspend Demurrage. Unless the clause is drafted to apply to time on Demurrage, that argument is weak. The words Laytime shall commence after Notice of Readiness (NOR) are not normally enough because there is no Laytime left to commence.

Berth Charters, WIBON Clauses and Time Lost After Demurrage

A Berth Charter ordinarily requires the ship to reach the named berth before the voyage stage ends and before Laytime can begin. Clauses such as WIBON (Whether In Berth or Not) , time lost waiting for berth or reachable on arrival may alter the ordinary position. The difficult question is whether such clauses continue to matter once the ship has already gone on Demurrage at an earlier stage of the voyage.

In principle, a Laytime acceleration clause does not automatically apply to Demurrage. If a Berth Charter ship arrives at a later port already on Demurrage, and there is no clear clause extending the waiting time provision to Demurrage, the Shipowner may have to rely on the ordinary rules applicable to the berth charter. Where there is a separate reachable on arrival or always accessible obligation, the Shipowner may also have a claim for detention if the berth is not available on arrival.

This area shows why the drafting of multiple-port charters needs care. If Shipowners want Demurrage to continue during waiting time off a later berth even though the charter is a Berth Charter, the charterparty should say so. If charterers want a fresh notice period or a berth arrival requirement to interrupt Demurrage, that should also be stated expressly. Silence leaves room for arguments based on the difference between Laytime machinery and post-Laytime liability.

The practical solution is to use wording that deals separately with Laytime and time on Demurrage. Phrases such as all waiting time shall count as Laytime or, if the ship is already on Demurrage, as time on Demurrage can avoid the uncertainty. The same approach should be used for shifting, inspections, document handling and terminal delays if the parties intend those periods to affect the post-Laytime calculation.

Tanker Heating Duties and Cargo Condition

Many tanker Demurrage disputes arise not from the arithmetic of Laytime but from the physical condition of the cargo and the ship’s ability to discharge it. Heated cargoes such as fuel oil, crude oil, molasses and vegetable oils may require careful temperature management. If the cargo arrives too cold or is not maintained at the required temperature, discharge may be slow, incomplete or technically impossible without further heating.

Cargo heating clauses vary. Some require the Shipowner to maintain the loaded temperature. Others require heating to a specified discharge temperature. Some impose an absolute obligation; others require due diligence. The difference is critical. If the obligation is absolute and the ship arrives below the required temperature, the Shipowner may lose Demurrage for the additional pumping time caused by the breach. If the obligation is one of due diligence, the Shipowner may rely on evidence of proper equipment, maintenance and crew operation.

Cia Argentina de Pesca v. Eagle Oil & Shipping Co Ltd illustrates the consequences of inadequate heating. The cargo temperature was below the required range, discharge was prolonged, and the tribunal found breaches relating to heating and discharge arrangements. The owner was not entitled to recover Demurrage for the extra time attributable to those breaches. The case shows that Demurrage is not payable for delay caused by the owner’s failure to provide the contracted discharge capability.

The physical science matters. Cloud point, pour point, viscosity, clingage, wax precipitation and the effectiveness of heating coils all affect whether the cargo remains pumpable. If a cargo falls below its cloud point and waxes separate, simply restoring the cargo to the cloud point may not reverse the problem. In vegetable oil cargoes, local overheating around coils can damage cargo while leaving other areas semi-solid. These operational realities explain why heating logs and temperature records are critical evidence in Demurrage disputes.

Pumping Warranties and Terminal Restrictions

A common tanker warranty states that the ship can discharge the entire cargo within 24 hours or maintain a specified pressure at the ship’s rail, provided shore facilities permit. This wording creates alternative routes to compliance. If the ship maintains the required pressure but discharge exceeds 24 hours because the shore side provides inadequate hoses, small-diameter lines or other restrictions, Shipowners will argue that the warranty has not been breached.

Disputes often arise because charterers deduct all time beyond 24 hours, while owners contend that the terminal prevented faster discharge. The evidence is usually technical: manifold pressure records, shore pressure records, number and size of hoses, terminal restrictions, pump logs, letters of protest and the sequence of stripping or crude oil washing. Missing records can be decisive. A master who fails to protest terminal restrictions may prejudice the owner’s position if the charterparty requires a protest.

London Arbitration 10/84 and London Arbitration 19/87 support the principle that charterers bear the burden of proving breach where the ship maintained the required pressure or where shore restrictions prevented performance. London Arbitration 11/99 similarly treated the ship as compliant where the receiving terminal chose to discharge through a single hose and the required pressure was maintained. These decisions reflect the commercial reality that shore facilities are often outside the owner’s control.

The Exxonvoy pumping warranty is more detailed. It states different pressure levels depending on the ship’s deadweight category and provides that time lost because of failure to meet the warranty will not count as Laytime or, if already on Demurrage, as time on Demurrage. It also requires the master to issue a letter of protest where terminal restrictions prevent compliance. This kind of drafting is more precise, but it also creates strict documentary obligations.

Stripping presents a separate issue. In theory, the warranted pressure should be maintained until discharge is complete. In practice, pressure inevitably falls when only the final residues remain and the ship is stripping the last tanks. Many charterers recognise a reasonable stripping period even where the charter is not explicit. London Arbitration 19/04 shows that a long stripping period will not necessarily prove owner fault unless the evidence demonstrates that the ship’s lines, pumps or operation were defective.

Unjustified Deviation and Demurrage

Deviation is a serious breach because it substitutes a different voyage for the voyage contracted. A justified deviation may be permitted to save life, protect the ship or cargo, obtain necessary assistance, or where the charterparty expressly allows the relevant departure. An unjustified deviation may deprive the Shipowner of contractual protections and may affect the right to claim Demurrage.

The classic analysis begins with the idea that a deviation goes to the root of the contract. Davis v. Garrett, Joseph Thorley Ltd v. Orchis Steamship Co Ltd, Internationale Guano-En Superphosphaatwerken v. Robert MacAndrew & Co, Kish & Co v. Taylor and United States Shipping Board v. Bunge y Born all demonstrate the severity with which deviation has historically been treated. Clauses that would otherwise protect the shipowner may cease to apply once the owner has departed from the agreed voyage without justification.

Hain Steamship Co Ltd v. Tate and Lyle Ltd refined the doctrine. Deviation does not automatically destroy the contract in every respect. Instead, the innocent party may elect to treat the contract as at an end or may affirm it. If the charterer elects to treat the contract as continuing with knowledge of the deviation, the charterer may remain bound by contractual obligations. If the charterer treats the contract as discharged, the owner may lose the contractual right to Demurrage after the deviation and may be left to any common law claim that remains available.

The question whether Demurrage incurred before an unjustified deviation remains recoverable is more difficult. If Laytime and Demurrage are calculated separately at loading and discharge, there may be an argument that accrued liability survives. If the voyage uses a combined calculation, the Shipowner’s position is weaker because the Demurrage calculation may be part of the contract displaced by the deviation. The safest conclusion is that unjustified deviation creates serious risk to a Demurrage claim and should never be treated as a routine operational choice.

When Demurrage Ends: Completion, Absence and Withdrawal

In ordinary circumstances, Demurrage ends when loading or discharge is completed. Completion is a factual and contractual issue, depending on the cargo, the charter wording and the operation concerned. For dry cargo, completion may be linked to the final removal of cargo from the ship. For tankers, completion may involve disconnection of hoses, completion of stripping, cargo documents or other events depending on the form. The charterparty should be checked carefully before assuming the endpoint.

Temporary absence from the port does not necessarily stop Demurrage. Tyne & Blyth Shipowning Co Ltd v. Leach shows that where a ship waiting at the port is damaged without Shipowner fault and goes away for repairs, Demurrage may stop during the absence and resume on return. Cantiere Navale Triestina v. Handelsvertretung der Russe Soviet Republik Naphtha Export shows that absence without Shipowner fault may not prevent time from continuing where the commercial adventure remains the same and the ship is expected to return.

Final withdrawal is different. Petrinovic & Co Ltd v. Mission Française des Transports Maritimes involved a Ship Master who sailed from Bordeaux for the ship’s safety during wartime conditions with no intention of returning to complete discharge there. Demurrage stopped when the ship left. The reason is practical and legal: the charterer cannot remain liable for Demurrage at a port where the Shipowner has finally removed the ship for the Shipowner’s own safety and has abandoned the local discharge operation.

The Tassos N shows that unusual agreements can produce different outcomes. There, the ship left Aqaba for Mersin by agreement while already on Demurrage, and Demurrage was held to run during the passage because the carrying voyage had already been completed on arrival at Aqaba and the parties’ arrangement preserved the Demurrage exposure. The case is unusual, but it illustrates that the parties can modify the ordinary position by agreement.

Who is Liable for Demurrage?

The primary debtor under a voyage charter is normally the Charterer. The charterer agreed the Laytime regime, accepted the Demurrage clause and assumed the risk of delay beyond the agreed allowance. In many cases, the matter ends there: the Shipowner calculates the claim and seeks payment from the charterer. More complicated issues arise where Bills of Lading (B/L), Lien Clauses, Cesser Clauses and Cargo Receivers become involved.

Bills of Lading (B/L) may create or transfer liability in several ways. They may contain an express Demurrage Clause. They may incorporate the terms of the charterparty. They may give the Shipowner a lien over cargo for Freight (F), Deadfreight (DF), Demurrage (D) and related costs. They may also be transferred during the voyage, so that the holder demanding delivery is not the original shipper and may not have been involved in the charter negotiation.

A lien is a security right, not automatically a personal promise to pay. It allows the owner to retain cargo as security for sums due, but it does not by itself create a cause of action against the cargo owner unless the Bill of Lading (B/L) or incorporated charter terms impose such liability. This distinction is essential. A Shipowner who fails to exercise a lien may still have a claim against the charterer, but the cargo receiver may not be personally liable unless the contractual documents make the receiver liable.

The liability structure should therefore be examined in layers. First, what does the charterparty say? Second, what do the Bills of Lading (B/L) say? Third, do the Bills of Lading (B/L) incorporate Charterparty Demurrage or Lien provisions? Fourth, has title or contractual responsibility passed by statute or by presentation of the Bill of Lading (B/L)? Fifth, is there a Cesser Clause limiting charterer liability and, if so, is the lien co-extensive and effective?

Incorporation of Charterparty Terms into Bills of Lading (B/L)

Incorporation clauses are common, but their effect is not automatic. A Bill of Lading (B/L) may state that all terms, conditions, liberties and exceptions of the charterparty are incorporated. Even then, the court must decide whether the particular charterparty clause is suitable for incorporation into the Bill of Lading (B/L) contract. Clauses that are insensible or inapplicable in the Bill of Lading (B/L) context may be rejected.

Fidelitas Shipping Co Ltd v. V/O Exportchleb confirms that a lien for Demurrage is an appropriate term to incorporate because it directly affects what the receiver may have to pay or secure to obtain delivery. A Demurrage payment clause is more difficult. If the charter clause says charterers shall pay Demurrage, that wording does not automatically become receivers shall pay Demurrage merely because the charterparty is incorporated.

The Miramar is the leading warning against excessive manipulation. The House of Lords refused to rewrite a charterparty Demurrage Clause so that charterer became consignee or Bill of Lading (B/L) holder. Incorporation may allow reasonable verbal adjustment, but it does not permit the court to impose on cargo receivers a personal liability that the words do not fairly create. Lord Diplock’s caution remains important in modern practice.

The Spiros C reinforces the same point. Broad incorporation language did not bring in discharge terms in a way that imposed the charterer’s Demurrage regime on Bill of Lading (B/L) Holders. The result depends on the wording and commercial context. A party seeking to impose Demurrage on Receivers should not rely on general incorporation alone; the Bill of Lading (B/L) should contain direct language or incorporate a charter clause that is clearly capable of applying to cargo interests.

Shippers, Consignees, Indorsees and Receivers

The identity of the liable cargo party depends on the contract of carriage and the transfer of rights and obligations under the Bill of Lading (B/L). The shipper is usually the original party to the Bill of Lading (B/L) contract. The Consignee may be the named person entitled to delivery. An indorsee may acquire rights by transfer of an order bill. A receiver may obtain delivery by presenting the Bill of Lading (B/L) or by undertaking to present it later. Each category must be analysed separately.

Even if the Bill of Lading (B/L) does not impose Demurrage as such, cargo interests may be under an implied obligation to take delivery within a reasonable time. Fowler v. Knoop and The Spiros C support that proposition. The consequence of breach is not Demurrage unless the contract says so; it is unliquidated damages for unreasonable delay. The charterparty discharge rate may be evidence of what is reasonable, but it is not automatically incorporated as the Bill of Lading (B/L) rate.

The Carriage of Goods by Sea Act 1992 modernised the transfer of rights and liabilities by focusing on the lawful holder of the Bill of Lading (B/L) and on whether that holder takes or demands delivery or makes a claim under the contract of carriage. This replaced the older and more rigid approach of the Bills of Lading (B/L) Act 1855. The modern statute better reflects commodity trading, where cargo may be sold several times while afloat.

Presentation of the Bill of Lading (B/L) may itself create obligations. Brandt v. Liverpool, Brazil and River Plate Steam Navigation Co Ltd explains the implied contract that can arise when the holder presents the bill and accepts delivery. By demanding cargo under the Bill of Lading (B/L), the Bill of Lading (B/L) Holder may accept the burdens as well as the benefits of the contract, including Freight and Demurrage if properly incorporated. However, a timely disclaimer may prevent such an implication if the owner nevertheless releases the cargo.

Charterers as Bills of Lading (B/L) Holders

A charterer may also become the Bill of Lading (B/L) holder, consignee or cargo Shipowner. In that situation, the question is whether the governing contract remains the charterparty or whether the Bill of Lading (B/L) creates a separate relationship. The usual rule is that as between Shipowner and Charterer, the Charterparty remains the governing contract, and the Bill of Lading (B/L) operates primarily as a receipt or document needed for the cargo transaction (Document of Title).

President of India v. Metcalfe Shipping Ltd illustrates the point. The buyer chartered the ship to carry goods purchased from sellers, and the Bill of Lading (B/L) was later endorsed to the buyer. The claim between owner and charterer was governed by the charterparty, not by the bill. The Bill of Lading (B/L) was issued to implement the sale and carriage arrangements; it was not intended to replace the charterparty between the same parties.

Love and Stewart Ltd v. Rowtor Steamship Co Ltd shows that the charter terms may prevail even where the Bill of Lading (B/L) records facts differently. The charter contained Reversible Laytime, and the Shipowners could not rely on an incorrect Bill of Lading (B/L) statement of loading time to claim more Demurrage from the charterers. The charterparty bargain remained controlling.

There are exceptions. If the parties clearly intend the Bill of Lading (B/L) to vary the Charterparty, the court may give effect to that intention. But such an intention will not be lightly inferred. Where the same parties are bound by a detailed charterparty, the safer assumption is that Demurrage and Laytime issues remain governed by that charterparty unless the later document clearly and mutually alters the arrangement.

Lien for Demurrage

A lien for Demurrage gives the Shipowner a right to retain cargo as security for Demurrage or other sums specified in the clause. It is a powerful commercial tool because cargo interests usually need delivery urgently and may provide security to release the goods. The lien is possessory: the Shipowner must retain control over the goods or place them in a manner that preserves the lien under applicable law.

A lien clause does not automatically confer a right of sale. Nor does it automatically impose personal liability on the cargo owner. It simply gives security. If the Shipowner wants both security and a direct claim against receivers, the documents should contain both a Lien Clause and wording creating the obligation to pay. The distinction is especially important where a Cesser Clause has released the charterer and the Shipowner seeks recovery from cargo interests.

The Shipowner must exercise the lien lawfully and reasonably. If cargo can be warehoused under local law while preserving the lien, and that course is cheaper than keeping the cargo on board, the owner may be expected to use it. If retaining cargo on board is reasonable, Demurrage may continue to accrue during the lien period. Lyle Shipping Co Ltd v. Corporation of Cardiff and The Boral Gas illustrate the principle that lawful and reasonable lien exercise does not by itself stop Demurrage.

Local law can be decisive. A lien recognised under English law may be ineffective at the discharge port because local authorities do not permit its exercise, because the cargo belongs to a government agency, or because port procedures make retention impossible. Shipowners should investigate the practical enforceability of a lien before relying on it as the main security for discharge port Demurrage.

Cesser Clauses and Co-Extensive Security

A Cesser Clause is designed to end or limit the Charterer’s liability once cargo has been shipped, usually on the basis that the Shipowner receives a lien over the cargo instead. The apparent simplicity of the wording can be deceptive. Courts have long treated Cesser Clauses as linked to the Lien. The charterer is released only to the extent that the Shipowner has an effective alternative remedy against the cargo.

The Sinoe describes Cesser Clauses as curious because they do not always mean what they appear to say. A clause stating that charterers’ liability ceases on shipment will not normally release the charterer where the Shipowner has no matching lien or where the lien is ineffective. The release and the security must be co-extensive in construction and, in many cases, in practical effect.

The co-extensive principle operates in several ways. If the lien covers freight and Demurrage but not damages for detention, the Cesser Clause may not release the charterer from damages for detention. If the Bill of Lading (B/L) does not incorporate the lien, or incorporates a different lien, the charterer may remain liable. If the lien is defeated by local law or practical impossibility, the release may fail to the extent of the deficiency.

Gencon-style wording deals with the issue expressly. It commonly preserves charterer liability for load port Demurrage and provides that charterers remain liable for discharge port Demurrage only to the extent Shipowners cannot obtain payment by exercising the lien. This drafting reflects the commercial compromise: the Shipowner should first look to the cargo where security exists, but the charterer is not released where the substitute remedy is unavailable.

Construction and Practical Effectiveness of the Lien

The first question is construction. Does the charterparty actually create a lien for the sum claimed? A Lien for Demurrage may not cover damages for detention. A Lien for Freight may not cover Deadfreight unless stated. A Lien in the Charterparty may be useless against a Bill of Lading (B/L) Holder if the Bill of Lading (B/L) does not incorporate it. Cases such as Clink v. Radford, Hansen v. Harrold Brothers, Jenneson Taylor & Co v. Secretary of State for India in Council and The Kavo Peiratis demonstrate the importance of exact drafting.

The second question is practical effectiveness. Even where the clause creates a lien in theory, can the owner exercise it at the discharge port? The Sinoe is the key modern authority. The Court of Appeal required the lien to be effective, not merely written into the charter. If the owner cannot exercise the lien because of illegality or true impossibility, the charterer may remain liable despite the Cesser Clause.

The burden of proving ineffectiveness usually rests on the Shipowner. Mere inconvenience is not enough. Commercial difficulty, delay, pressure from receivers or fear of losing goodwill will not necessarily prove impossibility. The Shipowner must show that the lien could not be exercised as a practical or legal matter. The Tropwave suggests that arbitrators will examine the local realities carefully and that practical impossibility may be established where the port environment makes exercise of the lien futile.

The value of the cargo is also relevant. If the cargo is worth less than the secured claim, the lien is not fully effective. Unless the charterparty clearly provides otherwise, the Cesser Clause should not release the charterer beyond the value or effectiveness of the security actually available. Parties who want a different result must draft it expressly.

Liabilities Before and After Shipment

A Cesser Clause may affect liabilities that accrued before shipment as well as those arising afterward. The reasoning is that the Shipowner gives up personal rights against the charterer in exchange for a lien on the cargo. If the lien covers load port Demurrage, the charterer may be released from that liability once the cargo is shipped. If the lien does not cover it, or if the Charterparty preserves charterer liability, the release will not apply.

Francesco v. Massey and Kish v. Cory show that a lien for Demurrage can cover Demurrage incurred at the loading port, not just at discharge, depending on wording. The commercial logic is that the cargo becomes the security for the agreed sums once shipped. Hansen v. Harrold Brothers similarly treats the liabilities of the charterer as replaced by the lien where the clause is wide enough and effective.

Modern Gencon wording changes the result by preserving charterer liability for load port Demurrage. This is commercially sensible because the owner cannot exercise a lien over cargo before it is shipped, and load port delay may already have caused loss before the cargo becomes available as security. The clause therefore distinguishes between load port liabilities and discharge port liabilities.

The drafting lesson is to avoid general language. If Charterers are to remain liable for load port Demurrage, Deadfreight, Damages for Detention or costs, those categories should be listed. If the Shipowner must first exercise a lien before pursuing Charterers, the clause should say whether that duty applies only at discharge or also to sums that accrued earlier.

Ship Master’s Limited Rights

Demurrage claims are normally brought by the Shipowner or by a party contractually entitled to sue. Older authorities considered whether the Ship Master could sue in the Ship Master’s own name. The issue is now largely historical, but it helps explain the distinction between a contract made with the Ship Master and a contract made with the Shipowner.

Where the Bill of Lading (B/L) or other contract is made personally with the Ship Master, old cases such as Jesson v. Solly allowed the Ship Master to sue. Where the contract is with the Shipowner, the Ship Master has no independent right to sue for Demurrage merely because the Ship Master signed the document or managed cargo operations. Brouncker v. Scott and Evans v. Forster reflect that limitation.

A Ship Master who is also a part-owner or managing owner may have a different position, as in Cawthron v. Trickett. But in modern commercial shipping, the practical claim will almost always be advanced by Shipowners, Disponent Owners or Time Charterers in the contractual chain. The Ship Master’s role is evidential and operational rather than legal.

The Ship Master also lacks authority to waive, settle or compromise a Demurrage Claim unless expressly authorised. A statement signed on a Statement of Facts (SOF), a local agreement with agents, or informal remarks during discharge will not normally bind Shipowners as a waiver of Demurrage. Ship Masters should therefore avoid language that purports to release claims and should record facts accurately without making legal concessions.

Bills of Lading (B/L) Holders Inter Se

Where multiple Bills of Lading (B/L) are issued under the same Charterparty, and several receivers take delivery of different parts of the cargo, the question may arise how Demurrage is to be calculated and shared. The usual starting point is that there is one cargo adventure and one Laytime calculation unless the contract clearly provides for separate calculations. This remains true even where discharge occurs at more than one port.

Compania Naviera Azuero SA v. British Oil & Cake Mills Ltd is the leading authority. A bulk cargo was discharged at Belfast and Avonmouth under multiple Bills of Lading (B/L). The court held that the charter required one overall calculation rather than separate calculations for each port. Time saved at one port could therefore affect the overall result. The decision reflects the presumption that the charterparty Laytime code applies to the voyage as a whole unless divided by clear language.

London Arbitration 7/97 expressed the same underlying presumption: one Laytime calculation for loading and one for discharge, however many ports are used, unless the words of the contract show a different intention. London Arbitration 24/92 rejected separate calculations by commodity where the charter provided rates for different cargoes but did not clearly require independent Laytime accounts. London Arbitration 1/10 reached a different result where the parties had agreed a different discharge port and different rates, showing that wording and later agreement can alter the presumption.

The allocation of the amount payable by individual Bill of Lading (B/L) Holders is more difficult. Older cases suggest that each holder may be liable for the Demurrage obligation imported into the Bill of Lading (B/L), although courts are unlikely to permit the Shipowner to recover more than the total Demurrage due. In practice, Shipowners may claim against one or more receivers and the receivers may seek contribution among themselves. Clear sale and discharge arrangements can avoid this uncertainty.

One Calculation or Several

The choice between one calculation and several calculations can change the financial result dramatically. If one port discharges quickly and another slowly, a single calculation allows time saved at one port to reduce Demurrage at the other. Separate calculations may produce Despatch at one port and Demurrage at another. The parties should therefore decide at the drafting stage whether Laytime is global or divided.

The language average rate often points toward a single calculation, particularly where the charter does not say at each port. But this is not a rigid rule. The whole charterparty must be read. If the charterparty states different Laytime allowances, different discharge rates, different cargo parcels or separate port regimes, the argument for separate calculations strengthens. Conversely, where the cargo is treated as one adventure, the presumption remains that the calculation is collective.

Reversible Laytime is different from multiple discharge port allocation. Reversibility normally concerns the relationship between loading and discharge, not the relationship between two discharge ports. Deleting a reversible provision does not necessarily mean the parties intended separate discharge port calculations. It may simply reflect that loading was on CQD terms or that reversibility was irrelevant.

For practical purposes, the Statement of Facts (SOF) should allow either method to be checked. If the charterparty is ambiguous, Shipowners and Charterers should preserve arrival, notice, commencement, stoppage and completion data at each port. A later tribunal cannot reconstruct a reliable calculation if the operational record treats the voyage as a single mass without port-specific detail.

Demurrage Time Bars

Demurrage time bars are now standard in many voyage charters. They require Shipowners to submit the claim and supporting documents within a fixed period, often 90 days after completion of discharge. If the Shipowner fails to comply, the claim may be deemed waived, barred or extinguished. Courts and tribunals enforce these clauses because they serve a clear commercial purpose: charterers need timely documents to verify the claim and, in many trades, to pass the claim along under a sale contract.

The Oltenia is the leading starting point. Bingham J held that all available supporting documents meant documents needed to support both liability and quantum. The Shipowner may correct factual errors or apply a different legal label later, but the substance of the claim and the necessary documents must be presented in time. A Demurrage time bar is therefore not satisfied by a bare invoice if the charter requires supporting evidence.

The required documents depend on the clause. Some clauses list Notices of Readiness (NOR), Statements of Facts, pumping logs, time sheets, port logs, letters of protest and other records. Others use general language such as supporting documents. If a listed document does not exist, tribunals may read the clause as requiring it only if it exists, but the owner should not rely on that generosity. If a document exists and is required, failure to provide it can be fatal.

The Sabrewing adopted a strict approach. Failure to provide signed pumping logs within the time bar defeated the claim, and the court treated the missing documents as fatal to the whole composite claim. The Eternity took a more flexible view, suggesting that a failure affecting one part of a composite claim should not necessarily bar the entire claim. The tension between these cases means owners should assume strict compliance is required and should submit a complete package within the agreed period.

The Eagle Valencia demonstrates the importance of a valid Notice of Readiness (NOR). If the only Notice of Readiness (NOR) supplied is contractually invalid and the charterparty requires the claim to be fully and correctly documented, the claim may fail. It is not enough that the charterer could have worked out the answer from other documents. The commercial purpose of the time bar is to provide a self-contained claim package, not to require charterers to conduct collateral investigations.

Documentary Discipline and Claim Presentation

A professional Demurrage claim should be built from the documents backward. The Shipowner should identify every clause that affects Laytime and Demurrage, then assemble documents that prove each step: arrival, Notice of Readiness (NOR), acceptance or deemed acceptance, commencement of Laytime, interruptions, completion, hose connection and disconnection, pumping restrictions, weather, strikes, breakdowns and any protests (Protest Letters).

The claim should not merely present a final number. It should show the calculation in a transparent format, identify the relevant charterparty clauses, state which periods are excluded or counted at half rate, and attach supporting documents in the order in which they are used. This helps charterers evaluate the claim quickly and reduces the chance of a time bar dispute based on incomplete substantiation.

If agents, terminals or charterers’ representatives hold documents, Shipowners should request them early. London arbitration decisions show little sympathy where Shipowners wait until the end of the time bar period and then discover that an agent is slow to respond. If the missing document is controlled by charterers or their agents, Shipowners may have a stronger argument, but relying on that argument is risky.

Electronic transmission should also be managed carefully. The charterparty may require presentation to charterers, not merely to a Shipbroker. If the claim is sent through a Shipbroking chain, Shipowners should obtain confirmation that it reached the charterer before the deadline. Where the time bar is strict, proof of dispatch may not equal proof of receipt unless the clause or applicable law treats it that way.

Contracts of Sale and Demurrage

Demurrage provisions in sale contracts operate in a different contractual relationship from Demurrage provisions in charterparties. The Charterparty governs Shipowner and Charterer. The Sale Contract governs Seller and Buyer. The buyer may be required to reimburse Demurrage, pay Demurrage at the charterparty rate, or indemnify the seller for Demurrage paid to the shipowner. The exact nature of the obligation depends on the wording.

The Devon illustrates the difficulty. The sale contract referred to Demurrage as per charterparty and contained its own Laytime provisions. The issue was whether the buyer owed an independent obligation to pay Demurrage even if the seller was not liable to the shipowner, or whether the clause was merely an indemnity. The Court of Appeal majority treated the clause as creating an independent obligation, while the dissenting judgment preferred an indemnity analysis.

The distinction is commercially important. If the sale clause is an indemnity, the seller can recover only to the extent the seller is liable under the charterparty. If it is an independent obligation, the buyer may owe Demurrage under the sale contract even where the seller has no matching liability to the Shipowner. Traders should not leave this to implication. The clause should state whether liability is independent or by way of indemnity.

Sale contract Demurrage clauses should also align with documentary time bars. A charterer who must submit a claim to a buyer within 30 or 60 days needs documents from the Shipowner in time to do so. If the charterparty time bar is 90 days but the sale contract time bar is shorter, the charterer may lose recourse against the buyer even though the Shipowner’s claim is valid. This is a common commercial trap.

Drafting Guidance for Modern Demurrage Clauses

A well-drafted Demurrage clause should identify the rate, the unit of time, whether pro rata applies, when Demurrage starts, whether any notice periods apply after Laytime has expired, and which exceptions continue during Demurrage. It should also address half-rate events, documentary requirements, payment timing, interest and any special operational provisions such as pumping, heating, shifting, inspections or berth accessibility.

If the parties intend ordinary Laytime exceptions to apply after Laytime expires, the clause must say so expressly. Words such as time not to count are not enough if they only speak to Laytime. Better wording is direct: the specified period shall not count as Laytime or, if the ship is already on Demurrage, as time on Demurrage. Similarly, if Demurrage is to be reduced rather than stopped, the clause should identify the reduced rate and the causal requirement.

Where multiple cargoes, part cargoes or several Bills of Lading (B/L) are involved, the charterparty should state whether Laytime and Demurrage are calculated separately or collectively. If liability is to be apportioned, the apportionment formula should be specified. If Shipowners are entitled to cumulative Demurrage under multiple charters, that should be understood commercially before the fixture is concluded.

For tanker charters, the pumping and heating provisions should be coordinated with Demurrage. The charter should state the required pressure, the consequence of shore restrictions, the need for letters of protest, the treatment of stripping and crude oil washing, and the records required. Many tanker Demurrage disputes are avoidable if the operational warranty and the documentary obligation are drafted as a single coherent code.

Commercial Summary

Demurrage is both a legal doctrine and a commercial pricing tool. Legally, it is liquidated damages for detention after Laytime. Commercially, it prices delay risk and gives both sides a predictable result. Its apparent simplicity hides a complex network of related issues: exceptions, owner fault, additional damages, Notices of Readiness (NOR), tanker warranties, deviation, liens, Cesser Clauses, Bills of Lading (B/L), time bars and sale contract recourse.

The strongest practical rule is to draft clearly and document everything. Shipowners should preserve every operational record needed to prove the claim. Charterers should review whether the claim is supported, whether exceptions apply, whether the ship contributed to the delay and whether any time bar has been satisfied. Cargo interests should understand when a Bill of Lading (B/L) or lien clause may expose them to Demurrage even though they were not party to the voyage charter.

The second practical rule is to avoid assuming that Laytime language automatically applies to Demurrage. Once the ship is on Demurrage, time normally runs continuously. A party seeking to stop, reduce or suspend Demurrage must point to clear words. This is the commercial force behind once on Demurrage, always on Demurrage.

The third practical rule is that Demurrage rarely exists alone. It interacts with Freight (F), Deadfreight (DF), Despatch (D), cargo quantity, terminal capability, port congestion, sale contract deadlines and post-voyage documentation. A professional Demurrage analysis therefore begins with the full contractual chain and ends with a carefully supported calculation, not with the daily rate alone.

Case Law on Demurrage and Practical Lessons

The case law on Demurrage can appear fragmented because the disputes arise from different forms, trades and factual patterns. A better way to understand the authorities is to group them by function. The Lips and Dias explain the legal nature of Demurrage. Suisse Atlantique and The Bonde define the boundary between Demurrage and additional damages. The Dias and The Spalmatori explain the strict approach to exceptions after Laytime. The Miramar and The Spiros C deal with the transfer of Demurrage obligations through Bills of Lading (B/L). The Sinoe and The Cunard Carrier explain the practical role of liens and Cesser Clauses.

This functional approach is useful for commercial users. A claim handler does not need to memorise every authority in isolation. The first task is to identify the legal category of the problem: calculation, exception, owner fault, additional damages, security, time bar or cargo interest liability. Once the category is identified, the relevant line of authority becomes much easier to apply.

The authorities also show that English law gives great weight to the words chosen by the parties. Courts may regard a result as harsh, but they will usually enforce a clear Demurrage bargain. Conversely, where a party seeks to escape the ordinary consequences of Demurrage through broad or ambiguous language, courts often require much clearer wording. This is especially true where charterers seek to rely on exceptions after Laytime has expired.

For drafting and claims practice, the message is consistent. A Demurrage provision should not be treated as a boilerplate clause. It should be aligned with the cargo, the route, the port risk, the charter form, the operational warranties and the sale contract chain. The more complex the voyage, the more carefully the Demurrage code must be written.

Operational Records That Decide Demurrage Disputes

Many Demurrage disputes are won or lost on records rather than on legal theory. The Statement of Facts (SOF) is the central document, but it is not the only one. Notices of Readiness (NOR), port logs, terminal logs, pumping logs, pressure charts, weather reports, letters of protest, free pratique records, berth line-up data, tug and pilot records, hose connection and disconnection times, cargo temperature logs and agent correspondence may all be necessary.

The ship master and agents should record events neutrally and accurately. A Statement of Facts (SOF) should not be turned into a legal argument, but it must capture the time and cause of each interruption. If the terminal restricts pumping pressure, the master should issue a protest. If shore hoses are inadequate, that fact should be recorded. If cargo is cold, temperature readings should be preserved. If a strike or breakdown occurs, the start and end times should be documented precisely.

Charterers should likewise protect their position. If they believe the ship is not ready, they should reject or reserve rights against the Notice of Readiness (NOR). If they allege Shipowner fault, they should collect contemporaneous evidence. If charterers rely on an exception, they should prove the event and the causal link. If they rely on a time bar, they should identify the missing documents promptly, although silence may not always prevent reliance on the clause.

A professionally prepared Demurrage claim should be capable of being audited without external investigation. The calculation should identify each counted and excluded period and tie it to a document. This is not merely good administration; in strict time bar regimes, it may be the difference between a recoverable claim and a total failure.

Detailed Analysis of Continuing Breach and Commercial Delay

The expiry of Laytime does not usually bring the charterparty to an end. It marks the beginning of a continuing breach, measured by the agreed Demurrage Rate. This is why the Shipowner normally remains bound to keep the ship available for completion of the contracted cargo operation. The charterer remains entitled to finish loading or discharge, but must pay the agreed compensation for the period during which the owner is kept from using the ship elsewhere. This analysis explains why the Shipowner cannot normally sail away merely because the Demurrage period has become inconvenient or commercially unattractive.

The position is different where the charterer’s conduct goes beyond delay and amounts to repudiation. A final refusal to load, a refusal to nominate cargo, an insistence on performance fundamentally different from the charterparty, or a delay so serious that the commercial adventure is frustrated may entitle the Shipowner to treat the contract as discharged. That is a high threshold. Ordinary congestion, inefficient cargo operations, slow receivers or administrative problems at the port will not usually be enough. The court asks whether the charterer’s conduct has destroyed the commercial foundation of the contractparty, not merely whether the Shipowner would prefer to leave.

This is commercially important in rising markets. If the Demurrage Rate is lower than the ship’s current market earning capacity, the Shipowner may feel trapped. The law nevertheless enforces the bargain unless the charterer’s conduct legally ends the contract. Demurrage is the price the parties agreed for delay risk. It is not adjusted upward because the market has moved in the Shipowner’s favour, just as it is not adjusted downward because the Shipowner would in fact have earned less elsewhere.

The same logic also protects charterers in a falling market. If the agreed Demurrage Rate is high and the Shipowner suffers little actual loss, the charterer cannot usually argue that the claim should be reduced. The function of liquidated damages is to avoid precisely that inquiry. The agreed Demurrage Rate may be generous or modest, but it is the contractual measure unless it is invalid under principles concerning penalties or displaced by a different contractual provision.

How Demurrage Differs from Detention

Demurrage and damages for detention are related but not identical. Demurrage is the agreed sum payable under the charterparty for delay after Laytime. Damages for detention are unliquidated damages recoverable where the charterparty does not provide a Demurrage remedy for the relevant delay or where the delay arises from a separate breach not covered by the Demurrage Clause. The distinction is important because detention must be proved, quantified and linked to recoverable loss.

A claim for detention may arise before Laytime starts, for example where a reachable on arrival obligation is broken and the ship is kept waiting outside a berth. It may also arise after a limited Demurrage period has expired, if the charter expressly provides a fixed number of Demurrage days and then leaves further delay outside the liquidated damages regime. In modern practice, however, many charters do not fix a maximum Demurrage period, so the Demurrage Rate continues to govern the delay until completion or termination.

When a claim is pleaded as Detention in addition to Demurrage, the court will examine whether the claimant is merely trying to recover more money for the same loss of time. If the substance of the claim is that the ship was detained and unable to earn elsewhere, the Demurrage clause normally covers it. If the claim concerns a different type of loss, such as loss of cargo intake, special expenses, damage to cargo, or breach of a separate guarantee, the claim may stand outside the Demurrage code.

The terminology should therefore be used carefully in claims correspondence. Calling a claim detention does not make it different from Demurrage. The facts and the contractual basis must show why the loss is not already liquidated by the Demurrage clause. Poorly framed claims risk being rejected as attempts to evade the agreed rate.

Port Congestion and Allocation of Risk

Port congestion is one of the most common causes of Demurrage. In a fixed Laytime charter, congestion is generally a charterer’s risk unless the charterparty contains an exception or a special waiting time provision. The commercial reason is clear. The charterer chooses or accepts the loading and discharge arrangements and undertakes to complete cargo operations within the allowed time. If the port is crowded, the shipowner is still deprived of the ship and the agreed Demurrage Rate applies once Laytime expires.

The position can become more complex in berth charters. If the ship has not yet reached the contractual berth, Laytime may not start unless the charter includes wording such as WIBON (Whether In Berth or Not), time lost waiting for berth, reachable on arrival or Always Accessible (AA). These clauses are designed to prevent charterers from avoiding time merely because the berth is unavailable. Their operation must be analysed carefully, especially where the ship arrives at a later port already on Demurrage.

Congestion can also interact with exceptions. A strike may create congestion, but the question is whether the later delay is caused by the strike itself or by the after-effects of congestion once the strike has ended. Similar problems arise after weather closures, government restrictions or terminal breakdowns. The clause must be examined for causal language. Some clauses protect against delay caused by the event itself; others may extend to consequences or after-effects if the wording is sufficiently broad.

In claims practice, congestion should be evidenced by berth line-ups, port authority records, agent reports and contemporaneous messages. A general statement that the port was congested may not be enough where the charterer relies on an exception or where Shipowners claim time lost waiting for berth. The exact reason why the ship could not berth must be identified.

Multiple Charters and Cumulative Demurrage

Part cargo and parcel trades raise the possibility that Demurrage may run under more than one charter at the same time. This can appear unfair if viewed as compensation for detention of the whole ship. English law generally treats the matter contractually. If each charter has its own Demurrage Clause and the charters are separate, each charterer may be liable under its own contract even though the ship is the same physical ship.

The commercial answer is that the Demurrage Rate for each part cargo may have been negotiated by reference to the cargo quantity, the space occupied, the trade, the risk and the Shipowner’s overall employment plan. It is not necessarily a full-ship rate. If a Shipowner contracts with several charterers, each may be paying for a different commercial risk. The law therefore does not automatically treat cumulative Demurrage as double recovery.

This principle is subject to the parties’ drafting. If the charters are intended to be read together, or if a form such as Vegoilvoy provides a shared regime for concurrent parcels, the calculation may be collective rather than separate. If two contracts between the same parties are cross-referenced and commercially integrated, the court may treat them as a single arrangement. If they are concluded independently, with different terms or without contemplation that the same ship would perform both, they are more likely to remain separate.

Shipowners and charterers should therefore decide at fixture stage whether part cargo charters are independent or interdependent. A liberty to complete clause, a rotation clause, a segregation clause and a Demurrage apportionment clause should be aligned. Otherwise, the parties may find that Demurrage runs in a manner one side did not expect.

Parcel Tanker Operations and Shared Delay

Parcel tankers often carry many grades or commodities for different cargo interests. Loading and discharge may occur through different shore tanks, barges, railcars, road tankers or terminal installations. In such trades, the conventional single-cargo Demurrage model may not fit easily. A delay affecting one parcel may not affect another, while a berth delay may affect all parcels assigned to the same terminal.

Forms such as Vegoilvoy attempt to deal with this by apportioning waiting time and Demurrage among cargoes in specified circumstances. The basic commercial idea is that where several shipments are loaded or discharged as part of an overlapping operation at the same installation, the delay should be shared rather than charged entirely to one charterer. But the drafting has produced disputes because terms such as concurrent, gross number of hours and simultaneous commencement are not always easy to apply to real terminal operations.

The most sensible approach is functional. If the cargoes could have been worked together and the terminal operation was organised as a coordinated whole, a shared regime may apply even though the first hose connection and final completion times are not identical for every parcel. If one substantial parcel is worked entirely on its own, before or after the others, the case for treating the operation as concurrent is weaker. The reason for any consecutive handling should be identified.

The key evidence includes terminal capacity, number of lines, product compatibility, tank allocation, shore restrictions, barge availability and the sequence agreed with the terminal. Without this evidence, apportionment becomes guesswork. In parcel trades, the documentary record should therefore be much more detailed than in a simple single-cargo voyage.

Cargo Accessibility and Overstowage

Where cargo is overstowed by other cargo, the ship may not be ready to discharge that cargo even if the ship has arrived and other cargo can be worked. For the affected charterer, Laytime may not begin until the cargo is accessible. The principle is commercially straightforward: a charterer cannot be expected to discharge cargo that cannot physically be reached.

The difficulty arises where the charterparty contains a time lost waiting for berth clause. If the ship waits for a berth while the relevant cargo is overstowed, should the waiting time count against that cargo interest? The authorities show tension. Some decisions support counting the waiting time where berth congestion would have delayed the ship in any event. Others focus on whether the ship was really waiting for a berth for the overstowed cargo or for another cargo that had to be removed first.

The most practical test is causation. If the berth delay is the operative cause and the overstowed cargo would have become accessible before the berth became available, the charterer may fairly bear the waiting time. If the ship could not have discharged the cargo even if a berth had been available because other cargo first had to be removed, the waiting time is not truly lost waiting for that cargo’s berth. The answer depends on the sequence of berth availability and cargo accessibility.

This issue is particularly relevant in dry bulk and breakbulk trades. Tanker parcel cargoes are normally accessible through separate tanks and lines, although practical restrictions can still arise through commingling, incompatibility or terminal sequencing. The same analytical discipline applies: identify what prevented the specific cargo operation and when that obstacle ceased.

Drafting Examples in Principle

A clause intended to suspend Demurrage should not say merely that time shall not count. It should say that the relevant period shall not count as Laytime or, if the ship is already on Demurrage, as time on Demurrage. That wording removes doubt about whether the clause applies only before Laytime expires. If the parties intend a half-rate result, the clause should state that Demurrage shall accrue at one-half of the agreed rate during the specified period.

A clause intended to preserve notice requirements after Demurrage has begun should be equally clear. It should state that Notice of Readiness (NOR) is required at each loading and discharge port whether the ship is on Laytime or on Demurrage, and that any agreed notice period applies in either case. Without such wording, a notice period expressed as a delay before Laytime commences may not affect a ship already on Demurrage.

A lien and Cesser Clause should state the categories secured by the lien, the liabilities that survive against charterers, and what happens if the lien is unavailable or ineffective. If charterers are to be released regardless of whether the lien can be exercised, that should be expressed in unmistakable terms. If charterers are released only to the extent Shipowners obtain payment by lien, the clause should say so.

A Demurrage Time Bar should identify the triggering date, the deadline, the documents required, whether copies are sufficient, whether electronic submission is permitted, and the consequence of non-compliance. Phrases such as all supporting documents can work, but they invite argument. A document schedule reduces the risk of dispute.

Tanker Evidence: Pressure, Hoses and Logs

In tanker Demurrage disputes, pressure records are often the most important evidence. The Shipowner may show that the ship maintained the required pressure at the manifold. Charterers may respond that the ship still failed to discharge within the warranted time and that pressure records are incomplete or unreliable. The tribunal then asks whether the delay was caused by the ship’s inability, shore restrictions, cargo condition or some combination of factors.

The number and diameter of shore hoses matter. A ship may have powerful pumps, but the flow rate will be limited if the shore side provides one small hose, a restricted line, long shore pipelines, elevated tanks or a terminal instruction to reduce pressure. The phrase provided shore facilities permit is therefore not ornamental. It allocates risk for shore-side limitations unless the owner has failed to protest or prove the restriction.

A proper letter of protest should be issued immediately when the ship master is told to reduce pressure, when fewer hoses are supplied than expected, when cargo arms fail, when shore tanks cannot receive cargo, or when back pressure prevents normal discharge. The protest should identify the instruction or restriction, the time it began, the person or terminal representative involved, and the expected effect on discharge.

Cargo logs should also distinguish main discharge, stripping, crude oil washing, line displacement, sampling, stoppages requested by shore, and stoppages caused by the ship. Treating all periods after hose connection as one continuous discharge period may be insufficient where the charter contains a pumping warranty or exceptions for stripping. Detailed logs make it possible to separate time that counts from time that does not.

Heating and Pumpability in Practice

Heating disputes should be approached by comparing the charterparty requirement, the cargo instructions, the loaded temperature, the voyage temperatures, the heating records and the discharge performance. If the ship was required to maintain temperature, the Shipowner should show continuous monitoring and reasonable use of heating equipment. If the ship was required to raise temperature, the Shipowner should show when heating began and whether the voyage duration made compliance possible.

Shipowners should be careful about short voyages. If the cargo is delivered cold by the shipper and the voyage is too short to raise it to the required discharge temperature, the Shipowner may argue that the charter contains an implied practical limitation or that the charterer supplied cargo in a condition inconsistent with the required performance. That argument will depend on the wording and the facts. It is better for the charter to state loading temperature requirements clearly.

Charterers should distinguish between slow discharge caused by cargo viscosity and slow discharge caused by inadequate heating. A naturally viscous cargo may discharge slowly even if properly heated. Conversely, a cargo that should have remained pumpable may become difficult because the ship delayed heating or suffered equipment failure. Expert evidence may be needed, particularly for molasses, heavy fuel oil, palm oil and similar cargoes.

The calculation of lost time is not always simple. If discharge would have taken 30 hours even with proper heating, and actually took 45 hours because the cargo was cold, only 15 hours may be excluded from Demurrage. The Shipowner is not deprived of all Demurrage merely because there was a heating breach; only the delay caused by that breach should be removed, unless the clause provides a different consequence.

Sale Contract Alignment

Charterers often stand between Shipowners and cargo buyers or sellers. They may be liable to Shipowners for Demurrage under the charter and seek to recover from buyers or receivers under the sale contract. If the sale contract Demurrage regime does not match the charterparty, the charterer may be exposed. The most common mismatch concerns time bars, documents, the rate, the starting point of Laytime and the treatment of exceptions.

A sale contract may provide Laytime on different terms from the charterparty. It may start time on different notice, use different working day definitions, or allocate delay differently between buyer and seller. It may refer to charterparty Demurrage simply to identify the rate, or it may create an indemnity for whatever Demurrage the seller pays. The distinction should be expressly addressed.

Where a CF (Cost Freight) or CIF (Cost Insurance Freight) seller controls the charter, the buyer may have little knowledge of the charterparty terms. A court may therefore hesitate before treating a sale clause as importing all charterparty machinery unless the wording justifies it. If the parties intend the sale Demurrage regime to mirror the charter, the charter or relevant terms should be available and the sale contract should say exactly what is incorporated.

For commercial certainty, traders should create a back-to-back timetable. The Shipowner’s claim deadline, the charterer’s review period and the sale contract claim deadline should be compatible. A charterer who receives the Shipowner’s documents after the sale contract deadline may have a valid liability outward with no recovery inward. That is a commercial drafting failure, not a Demurrage calculation problem.

Dispute Strategy and Arbitration

Demurrage disputes are commonly resolved in arbitration because voyage charters frequently contain arbitration clauses. The most effective claims are those that combine clear legal analysis with disciplined documents. Tribunals are less persuaded by broad assertions of delay and more persuaded by a coherent timeline supported by contemporaneous records.

Shipowners should identify the contractual route to recovery: Demurrage under the charterparty, Detention (D), Deadfreight (DF), additional damages, lien enforcement, or Bill of Lading (B/L) liability. Mixing those routes without explanation can weaken the claim. Charterers should identify whether they dispute the validity of Notice of Readiness (NOR), the expiry of Laytime, the inclusion of particular periods, the rate, the documents, the time bar or the legal basis of the claim.

Where technical tanker issues arise, expert evidence may be useful but should be focused. A tribunal needs to know whether the ship could maintain the warranted pressure, whether shore facilities permitted faster discharge, whether the cargo was properly heated and how much time was lost by any breach. General engineering commentary that does not answer the contractual question may add cost without resolving the dispute.

Settlement is often sensible because Demurrage disputes can be document-heavy and fact-intensive. However, settlement should not obscure recurring drafting problems. If the same clause produces repeated disputes, the parties should revise the form rather than treating each voyage as a new isolated problem.

Practical Checklist for Shipowners

Shipowners should check the charterparty immediately after fixture to identify the Laytime code, Demurrage rate, exceptions, pumping or heating obligations, time bar and required documents. Masters and agents should be instructed before arrival about the exact records needed. The strongest Demurrage claim is prepared during the voyage, not after memories have faded and terminal documents have become difficult to obtain.

At each port, Shipowners should preserve the Notice of Readiness (NOR), evidence of arrival, berth availability information, free pratique status where relevant, commencement of Laytime, all stoppages, the cause of each stoppage, cargo operation times and completion. In tanker trades, pressure records, cargo temperature logs, hose details and protests are essential. In dry cargo trades, weather records, hatch-by-hatch progress and labour stoppages may be critical.

After discharge, Shipowners should prepare the claim quickly and compare the document package with the time bar clause. If original documents are required, copies may not be enough. If certified documents are required, uncertified copies may be challenged. If the clause requires all supporting documents, the package should support each constituent part of the claim, not merely the final invoice.

Shipowners should also consider security. If Demurrage is substantial and payment risk exists, the lien position should be examined before cargo is released. Once cargo is delivered without security, the practical leverage may be lost even if the legal claim remains.

Practical Checklist for Charterers

Charterers should review Notices of Readiness (NOR) promptly and reserve rights if the notice is invalid, premature or unsupported. Charterers should monitor Laytime independently rather than waiting for the Shipowner’s post-voyage calculation. A charterer who understands the running calculation can manage exposure, gather evidence and communicate with receivers or sellers in time.

If charterers rely on exceptions, they should collect evidence of the event and causation. A strike notice, weather report or terminal breakdown message is not enough unless it explains how the event delayed the ship during the claimed period. If half-rate Demurrage is claimed, charterers should identify the precise period to which the half-rate event applies.

Charterers should also police time bars carefully. When a claim is received, it should be checked against the required documents. If key documents are missing, charterers may reserve rights or reject the claim depending on the clause. However, commercial prudence may require early notification of defects, especially where the missing document is in charterers’ own possession or easily available to their agents.

Where charterers intend to pass Demurrage to buyers or receivers, they should ensure that the sale contract claim is made within the sale contract deadline. Charterers should not assume that a valid Shipowner’s claim automatically creates a valid recovery under the sale contract. The two contracts must be analysed separately.

Practical Checklist for Cargo Interests

Cargo interests receiving Bills of Lading (B/L) should understand whether the Bills of Lading (B/L) incorporate Charterparty terms and whether a lien for Demurrage exists. A receiver may face pressure to provide security even if the receiver was not the voyage charterer. The first question is whether the Shipowner has a lien; the second is whether the receiver has personal liability; the third is whether payment or security can be recovered from another party in the sale chain.

Before demanding delivery, receivers should consider whether accepting cargo under the Bill of Lading (B/L) may create an implied obligation to pay Freight (F) or Demurrage (D). If receivers intend to deny liability, any disclaimer should be made before delivery is accepted. Once cargo is taken without reservation, the receiver’s position may become more difficult.

Where cargo is government-owned, state-controlled or subject to local port rules, lien enforcement may be restricted. Receivers and Shipowners should both investigate local law early. A lien that exists on paper may be commercially useless if the port authority will not permit the ship to retain cargo or if local law requires discharge regardless of the Shipowner’s claim.

Cargo interests should also keep discharge records. If the Shipowner claims Demurrage through a lien or incorporated Bill of Lading (B/L) terms, receivers may need to show that delay was caused by the ship, by another parcel, by terminal restrictions outside their responsibility, or by an exception under the incorporated charterparty. Without records, those arguments become much harder.

Final Professional Synthesis

The law of Demurrage is strict because the commercial purpose of Demurrage is certainty. Parties agree in advance what delay after Laytime will cost. That agreement reduces evidential disputes, supports fixture pricing and allows Shipowners and charterers to allocate port risk. The same strictness explains why exceptions after Demurrage require clear wording and why documentary time bars are enforced.

At the same time, Demurrage is not a blunt instrument that ignores all facts. Shipowner fault may stop time. A separate breach may support additional damages. A pumping warranty may exclude excess discharge time. A lien may fail if ineffective. A Bill of Lading (B/L) Holder may or may not become personally liable depending on incorporation and conduct. A time bar may defeat an otherwise valid claim. The doctrine is strict, but it is not simplistic.

The best professional approach is to treat Demurrage as a system. The calculation depends on the charter text, the operational record, the cargo, the port, the conduct of both parties and the wider sale or Bill of Lading (B/L) chain. A correct claim is not merely a mathematical statement; it is a contractual argument supported by documents.

For modern shipping practice, the lessons are practical: draft precisely, record accurately, protest promptly, claim within time, and align the charterparty with sale contracts and Bills of Lading (B/L). When those steps are taken, Demurrage performs its intended function. When they are ignored, a simple daily rate can become one of the most expensive disputes in the voyage.

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