Demurrage in a Voyage Charterparty

Demurrage in a Voyage Charterparty

Demurrage is the agreed financial consequence of keeping a ship in loading or discharging operations beyond the laytime allowed by a voyage charterparty. It is not a casual penalty for delay. In commercial terms, it is the price agreed in advance for the ship’s continued detention after the charterer has used the permitted loading or discharging time.

In a voyage charter, the freight normally compensates the shipowner for the sea passage and for the agreed period during which the charterer may load and discharge the cargo. Once that agreed period is exceeded, the risk of further time generally moves to the charterer, unless the charterparty contains a clear exception or the delay is caused by the shipowner’s own fault.

Demurrage is therefore closely connected with laytime, but it is not the same subject. Laytime defines the permitted time. Demurrage measures the contractual liability that arises when that time has been exceeded. The practical result is that a laytime calculation cannot be separated from the demurrage clause, the notice of readiness provisions, any exceptions, and any time-bar wording governing claims.

The Commercial Purpose of Demurrage

The commercial purpose of demurrage is certainty. Instead of leaving the shipowner to prove the market value of every day lost after laytime expires, the parties agree a daily rate in advance. That rate may be higher or lower than the ship’s actual market earnings when the delay occurs, but it is the contractual measure chosen by the parties.

This certainty is important in dry cargo fixtures, tanker charters, contracts of affreightment, and cargo strings where loading and discharge delays may affect several connected contracts. A fixed demurrage rate enables the parties to calculate exposure quickly and to close accounts without proving every item of operating cost, lost employment, or market opportunity.

Although demurrage is often described as liquidated damages, it is also treated commercially as extended freight. The charterer has received more time with the ship than the laytime bargain allowed, and the demurrage rate is the agreed compensation for that additional use. This explains why demurrage is often handled with the same commercial seriousness as freight, particularly where the charterparty gives the shipowner a lien for unpaid sums.

Gencon Demurrage Wording

The traditional Gencon 1976 demurrage clause provides for a stated number of running days on demurrage at the rate inserted in the charterparty, payable per day or pro rata for any part of a day, day by day, and allowed to the merchants altogether at the loading and discharging ports. The wording may look simple, but each phrase carries practical consequences.

The reference to a daily rate fixes the amount payable for each day beyond laytime. The words “pro rata for any part of a day” avoid the older rule under which using part of a day could lead to a full day being charged. The phrase “payable day by day” means that a fresh debt can accrue at the end of each day of detention, which may be important when the shipowner wishes to exercise a lien on cargo or apply pressure for security.

The old Gencon wording also limited the demurrage period to ten running days. After that period, the shipowner’s claim could move from demurrage to damages for detention at large. Modern fixtures frequently delete or amend that limit. The Gencon 1994 approach removed the traditional ten-day cap and also introduced more detailed payment wording, including a right in certain loading-port circumstances to give written notice requiring payment before termination rights arise.

Because many voyage charterparties are heavily amended, the printed form should never be read in isolation. A typed rider clause may alter the demurrage rate, remove the time limit, change when payment falls due, introduce claim-presentation deadlines, or make specific exceptions apply to time on demurrage. The final bargain is the charterparty as a whole.

Demurrage as Liquidated Damages

Once the charterer fails to complete loading or discharging within the agreed laytime, the charterer is normally in breach of the voyage charterparty. Demurrage is the agreed liquidated damages for that breach. The liability does not depend on whether the charterer has been morally or operationally at fault. If the charterer has taken more than the agreed time, demurrage is payable unless the charterparty or the law provides a valid answer.

This point is central. A charterer may be liable even though the delay was caused by congestion, shortage of shore labour, weather not falling within a relevant exception, difficulty with receivers, or other circumstances outside the charterer’s personal control. The laytime bargain places a time risk on the charterer, and the demurrage clause prices that risk.

The position is not normally changed merely because rules such as the Hague Rules are incorporated. Cargo responsibility rules do not usually rewrite the charterer’s separate obligation to complete loading or discharging within the contractual time. A charterer who exceeds laytime remains liable for demurrage unless the charterparty clearly says otherwise or the delay is legally attributable to the shipowner.

Even where a clause refers to delay due to the charterer’s fault, the expiry of laytime itself may be sufficient contractual fault for demurrage purposes. The breach is the failure to complete within the time promised. The parties have already agreed what is to be paid for that breach.

“Once on Demurrage, Always on Demurrage”

The familiar phrase “once on demurrage, always on demurrage” means that ordinary laytime exceptions do not automatically continue to protect the charterer after laytime has expired. If Sundays, holidays, weather interruptions, strikes, or other events stopped laytime before demurrage began, they will not necessarily stop demurrage afterward.

The reason is practical. If the charterer had completed loading or discharge within the laytime, the ship would usually have sailed before the later delaying event affected her. Once the ship is detained beyond the contractual allowance, the continuing loss is treated as a consequence of the charterer’s failure to finish on time, unless the charterparty clearly transfers that later risk back to the shipowner or suspends demurrage.

The rule must not be used mechanically. It is not an independent clause written into every charterparty. It is a principle of construction and risk allocation. If the charterparty states clearly that a particular exception applies to demurrage as well as to laytime, the court or tribunal will give effect to that wording. However, general exceptions are usually insufficient. The words must be clear enough to cover time after the ship has gone on demurrage.

For example, a strike clause, weather clause, ice clause, or force majeure clause may stop laytime before demurrage starts. Once demurrage has begun, the same clause will not usually stop the demurrage clock unless it expressly refers to demurrage, to time on demurrage, or by necessary implication covers the post-laytime period.

Exceptions That May Affect Demurrage in Voyage Charterparty

Exceptions affecting demurrage must be drafted with particular care. A clause saying that certain events do not count as laytime is not the same as a clause saying that those events do not count as laytime or demurrage. Likewise, a general exceptions clause protecting a party from delay or loss may not be enough if the demurrage code appears to be a complete and separate bargain.

The safer drafting approach is direct wording. If the charterer is to be protected during strikes, ice, bad weather, port closures, government restraints, mechanical breakdown ashore, or other events after the ship is already on demurrage, the clause should state that time lost by those causes shall not count as laytime or time on demurrage. Without such wording, the charterer carries a serious risk that demurrage will continue to run.

Some clauses are concerned only with the period during which the excepted event is actually operating. Others protect the charterer from the consequential delay caused by that event. The difference can be substantial. A strike may end today but leave a queue of ships that continues to delay berthing for several days. Whether that later delay is protected depends on the language of the clause and on proof that the excepted event remained the effective cause of the delay.

Where the charterer relies on an exception, the charterer normally bears the burden of proving that the exception applies, that the relevant facts fall within it, and that the claimed period was caused by the excepted event. Ambiguity is dangerous because demurrage exceptions are construed strictly.

Delay Caused by the Shipowner’s Fault

A separate and important qualification is delay caused by the fault of the shipowner or those for whom the shipowner is responsible. This principle can interrupt both laytime and time on demurrage. It does not depend on the charter containing a specially drafted exception. A shipowner cannot normally recover demurrage for delay that the shipowner has caused.

The classic examples include negligent operation of the ship, wrongful removal from the berth, defective cargo gear where the shipowner is responsible for providing working gear, or delay caused by stevedores for whom the shipowner is contractually responsible. If the shipowner’s fault obstructs cargo operations, the charterer may be entitled to deduct the period actually caused by that fault.

The burden of proof matters. Where the shipowner’s fault merely slows or interferes with cargo operations, the charterer should be ready to show how much time was actually lost. If the shipowner’s conduct deprives the charterer of access to the ship altogether, the burden may shift in practical effect because the shipowner may have to show that no delay resulted from the ship being unavailable.

Not every interruption connected with the ship is automatically the shipowner’s fault. A breakdown without breach, a delay caused by external circumstances, or an unavoidable port authority order may not stop demurrage unless the charterparty says so. The question is whether the delay is legally attributable to the shipowner, not merely whether it occurred while the ship was present.

When the Ship Is Used for the Shipowner’s Own Purposes

A difficult issue arises when the ship is waiting under the charter but the shipowner uses the ship during that period for another purpose, such as bunkering for the shipowner’s convenience, performing work for another charter, or moving away from the berth for reasons unrelated to the loading or discharging operation. In such cases, the shipowner may not be able to say that the ship is being detained by the charterer for the whole period.

The commercial test is not always straightforward. Minor ship business carried out during waiting time will usually make no difference. Routine maintenance by the crew, paperwork, ordinary surveys, or other activities that do not withdraw the ship from the charterer’s use should not stop time. However, a more substantial withdrawal of the ship from the charterer’s disposition may prevent demurrage from accruing, particularly if the ship is no longer ready and available for the cargo operation.

This area remains fact-sensitive. The stronger the connection between the movement or activity and safe, lawful, or efficient cargo operations, the stronger the shipowner’s position. The more the activity appears to be for the shipowner’s separate commercial convenience, the greater the risk that demurrage will be interrupted or reduced.

Demurrage and Mitigation

Because demurrage is liquidated damages at an agreed daily rate, the shipowner is not required to mitigate the daily amount of the loss. The shipowner does not have to prove that the ship would have earned more, less, or exactly the same amount elsewhere. The contractual rate applies because the parties have fixed it in advance.

However, that does not mean the shipowner may act unreasonably and prolong the period of detention. A limited mitigation principle may apply to the length of the delay. The shipowner may be expected to take reasonable steps that prevent unnecessary continuation of the detention, provided those steps do not prejudice the shipowner’s own legitimate rights.

The lien cases illustrate the point. A shipowner who lawfully refuses to discharge cargo until freight, demurrage, or security is provided does not lose the right to claim for resulting delay merely because the cargo could have been landed. But if keeping the cargo on board is plainly unreasonable and a cheaper, equally secure, and commercially safe alternative exists, a tribunal may find that further detention was not recoverable.

Reasonableness is judged from the shipowner’s position at the time, not with hindsight. A shipowner is entitled to protect the lien, preserve security, avoid doubtful local procedures, and avoid risking the loss of rights. The law does not require the shipowner to sacrifice his own protection merely to reduce the charterer’s exposure.

Conversely, if the shipowner takes reasonable steps beyond strict contractual duty to speed up loading or discharge and thereby reduce demurrage, the costs of those steps may be recoverable. Overtime payments, extra labour, or practical measures that reduce the detention can be justified where they are commercially reasonable and causally connected to shortening the delay.

Liens and the Recovery of Demurrage

Demurrage is often protected by a lien clause. The practical value of the phrase “payable day by day” is that the shipowner may have an accrued claim while the cargo is still on board or under control. That timing can be important where the shipowner needs security before completing discharge.

A lien is a powerful remedy, but it must be used carefully. The shipowner should identify the amount claimed, preserve contractual and documentary support, communicate clearly with the charterer or receiver, and avoid conduct that could be characterized as unreasonable detention. Where the amount is disputed, security may be a sensible commercial compromise.

The right to lien for demurrage may differ depending on whether the claim is against the charterer, a bill of lading holder, receivers, or cargo interests. The wording of the lien clause, the incorporation of the charter into bills of lading, the identity of the contractual carrier, and the local law at the discharge port may all affect the practical enforceability of the remedy.

Demurrage and Damages for Detention

Damages for detention are different from demurrage. Demurrage is the agreed rate for delay covered by the demurrage clause. Damages for detention are unliquidated damages for delay outside that agreed code, or for detention after any contractual demurrage limit has expired.

Under the traditional Gencon 1976 wording, the ship was allowed only ten running days on demurrage. After that contractual period, the shipowner could claim damages for detention at large. Those damages would be assessed by ordinary principles, including causation, remoteness, proof of actual loss, and any market evidence relevant to the ship’s lost earning opportunity.

Where the charterparty contains no limit on demurrage, the demurrage rate normally continues until the loading or discharging operation is completed, subject to frustration, termination, repudiation, or an applicable exception. The shipowner cannot usually escape an unattractive demurrage rate merely by saying that the delay has become unreasonable. The agreed rate remains the parties’ chosen measure unless the contract or the facts take the case outside the demurrage regime.

This distinction explains why the drafting of a demurrage cap is commercially important. If the parties intend demurrage to run without limit until completion, the clause should say so or remove any printed cap. If they intend demurrage to apply only for a fixed period and then leave the shipowner to damages at large, the wording should be equally clear.

When Additional Damages May Be Claimed

Demurrage normally covers delay caused by failure to load or discharge within laytime. If the only loss suffered by the shipowner is the continued detention of the ship during cargo operations, the shipowner will usually be confined to demurrage. That remains true even where the delay also results from another breach of the charterparty, provided the additional breach produces no distinct loss beyond delay.

The position changes where the charterer’s breach causes a different kind of loss. A classic example is where delay means the ship can load only to winter marks rather than summer marks, causing a separate loss of freight. In that type of situation, the demurrage rate compensates for the time lost, but it may not compensate for the independent financial loss caused by the inability to load the full cargo.

Another category is delay outside the laytime and demurrage machinery. If the charterer fails to nominate a loading port, prevents the ship from becoming an arrived ship, fails to provide a required berth or loading facility before laytime can begin, or delays the presentation of bills of lading after loading, the shipowner may have a claim for damages at large rather than demurrage. The answer depends on whether the charterparty brings that period into the laytime code.

The Gencon “time lost waiting for berth” wording is an example of a clause that may bring pre-berthing delay into the laytime and demurrage calculation even before an ordinary notice of readiness could have been effective. Without such wording, a shipowner may need to frame the claim as detention or damages for breach rather than demurrage.

When Demurrage Falls Due

Where the charterparty states that demurrage is payable day by day, the shipowner’s cause of action accrues progressively. At the end of each day on demurrage, a sum becomes due at the contractual rate. This is not merely accounting language; it can affect lien rights, default notices, interest, and the timing of claims.

The phrase “per day or pro rata for any part of a day” also matters. If a ship remains on demurrage for six hours after laytime expires, the amount is calculated proportionately unless the charterparty provides differently. This gives a fairer and more precise result than charging a full extra day for any part-day detention.

Some charters postpone payment until invoice, supporting documents, completion of discharge, or final laytime calculation. Others require demurrage to be settled directly with receivers or cargo interests. Such wording must be read carefully because it may affect whether the charterer remains primarily liable, whether the shipowner has agreed to look elsewhere for payment, or whether the charterer has merely arranged a payment mechanism while remaining responsible.

Who Is Liable for Demurrage

The charterer is normally liable for demurrage under the voyage charterparty. This remains the starting point unless a cesser clause, lien clause, receiver-payment clause, or other special wording changes the allocation. A provision that demurrage is to be settled by receivers does not automatically release the charterer unless the charterparty clearly has that effect.

Where charterparty terms are incorporated into a bill of lading, the position can become more complex. If the incorporated clause specifically says the “charterer” must pay demurrage, that wording may not readily impose personal liability on a bill of lading holder. If the clause is framed more broadly and refers to merchants, receivers, or holders, liability may be easier to establish.

The word “altogether” in some forms is intended to prevent multiplication of the demurrage claim. The shipowner should not recover the same demurrage several times from several cargo interests. The better commercial view is that there is one demurrage debt, even if more than one party may be liable for it. Payment by one liable party should reduce or discharge the corresponding liability of others to that extent.

Time-Bar Clauses for Demurrage Claims

Modern voyage charters frequently contain strict time-bar clauses for demurrage claims. These clauses may require the claim and supporting documents to be presented within a fixed number of days after completion of discharge, after the end of the voyage, or after another defined event. If the deadline is missed, the claim may be extinguished.

Courts and tribunals generally enforce clear time-bar clauses strictly, even where the result is harsh. The commercial purpose is to achieve prompt final accounting while evidence is still available and while the parties can investigate disputed statements of fact, notices, stoppages, pumping logs, weather records, and port documents.

Where the clause requires supporting documents but does not list them exhaustively, the shipowner must provide documents needed to support liability and the period claimed. In a straightforward demurrage claim, this will usually include a valid notice of readiness, statement of facts, laytime statement, and any records necessary to explain deductions, interruptions, or disputed periods.

A claim may fail if an essential document is missing or if the only notice of readiness submitted within the deadline is contractually invalid. This is why the demurrage file should be assembled before the deadline, not after a dispute has already crystallized. Without-prejudice or alternative laytime calculations may be useful, but they do not cure failure to provide an essential supporting document where the charter requires one.

At the same time, the law does not usually require production of a document that never existed or that cannot be obtained despite reasonable efforts. If the charter permits oral notice of readiness, the absence of a written notice may not itself defeat the claim, although written confirmation remains much safer. The claim and supporting documents need not always arrive in one package, but they must arrive within the contractual time limit if the clause requires that result.

Amending a Demurrage Claim After the Deadline

Disputes often arise when a demurrage claim is presented in time but later corrected. A calculation error, arithmetical adjustment, revised laytime statement, or alternative legal analysis may be permitted after the deadline if the substance of the claim and all necessary supporting documents were provided within time.

The position is different where the later amendment introduces a genuinely new head of claim or requires fresh factual investigation that the time-bar clause was designed to avoid. A claim presented as one type of charge may not always be reformulated into a substantially different claim after the time limit has expired. The result depends on the wording of the clause and the degree of factual overlap between the original and revised claim.

For practical purposes, a demurrage claim should be prepared as if it will be challenged line by line. The safest file includes the charterparty, recap, riders, notices of readiness, statements of fact, port logs, weather records, stoppage notes, pumping logs where relevant, invoices, correspondence, and any documents specifically required by the charter.

United States Approach to Demurrage in Voyage Charterparty

Under U.S. maritime law, demurrage is commonly described as extended freight. Once the free time or laytime expires, the charterer becomes liable at the rate agreed in the charter for the additional time used, unless the charterparty contains a clear exception, the delay is caused by the shipowner’s fault, or another recognized defence applies.

The U.S. approach is broadly similar to the English approach in recognizing the rule that once the ship is on demurrage, ordinary laytime exceptions do not suspend demurrage unless the charterparty expressly extends those exceptions to demurrage. Rain, holidays, strikes, fog, port closure, and other events will not normally interrupt time on demurrage if the clause protects only laytime.

U.S. decisions and arbitration awards also recognize that shipowner fault may interrupt demurrage. Where a ship defect, equipment problem, or operational fault attributable to the shipowner causes additional delay after demurrage has begun, the charterer may argue that the demurrage clock should stop for the period actually caused by that fault. The charterer generally bears the burden of proving both fault and causation.

The U.S. treatment of damages for detention has produced more varied results. Some awards treat demurrage as the exclusive remedy for delay associated with loading or discharge so long as the charterparty remains in force. Others allow detention damages where the charterer’s conduct is viewed as a separate wrongful detention, such as using the ship as floating storage, withholding cargo or documents, failing to open a letter of credit, giving no discharge orders, or causing an extraordinary delay beyond the laytime bargain.

Demurrage or Detention Under U.S. Law

The practical debate in U.S. cases is whether the shipowner bargained for the demurrage rate as the full price of all loading and discharge delay, or only for ordinary cargo-operation delay. When the charterer deliberately holds the ship for its own commercial purposes, the shipowner may argue that the case has moved beyond demurrage and into detention damages.

There is no simple mechanical answer. Tribunals may examine the charter form, whether laytime was ultimately exceeded, the length and commercial character of the delay, whether cargo was ready, whether the charterer had alternatives, whether the delay was deliberate, and whether the shipowner proved actual loss. Similar facts have sometimes produced different results because the underlying views of demurrage and detention are not identical.

Where the charter is on full liner terms, U.S. awards have also recognized that the shipowner may bear ordinary loading and discharging risks but not necessarily the absolute risk of a charterer failing to have cargo ready or failing to proceed expeditiously. A charterer still has duties that may support a detention claim if breached.

The safer commercial lesson is to draft the intended remedy. If the parties want the demurrage rate to be the exclusive compensation for all loading and discharging delay, including charterer-caused commercial delay, the wording should say so. If the shipowner wants detention damages for particular breaches, such as lack of cargo readiness or use of the ship as storage, the clause should preserve that right expressly.

Demurrage, Cargo Claims, and Partial Awards

Demurrage is usually treated as a separate monetary obligation from cargo claims. A charterer cannot ordinarily refuse to pay undisputed demurrage merely because there is a cargo damage claim, shortage claim, contamination dispute, or quality dispute. The demurrage account concerns the time used; the cargo claim concerns a different alleged loss.

This separation can be important in arbitration. A tribunal may issue a partial final award for undisputed demurrage while leaving cargo damage or other counterclaims for later determination. The same approach may be taken where part of the demurrage claim is admitted and another part depends on disputed exceptions, notices, or time-bar issues.

The principle should not be overstated. A charterer may still have a valid deduction if the delay was caused by shipowner fault, if the claim is time-barred, if the calculation is wrong, or if the charterparty allows a set-off or cross-claim in the relevant circumstances. But demurrage is not automatically suspended merely because a separate dispute exists.

Despatch as the Commercial Reverse of Demurrage

Despatch is the amount payable by the shipowner to the charterer when loading or discharging is completed in less than the allowed laytime. It is sometimes described as the commercial reverse of demurrage, but there is an important difference: a right to despatch must be agreed. It is not normally implied into a silent charterparty.

Where despatch is agreed, the calculation depends on the wording. If the charter refers to all time saved, the charterer may receive despatch even for days that would not have counted as laytime, such as Sundays or holidays, because the shipowner benefits from having the ship available earlier. If the charter limits despatch to laytime saved only, excepted periods may not generate despatch.

There is also a distinction between time saved and idle time that never counted against laytime. A period during which the ship is idle because of a laytime exception is not necessarily time saved for despatch purposes. The charterparty should specify whether despatch applies to all working time saved, all calendar time saved, or laytime saved only.

Practical Drafting Points

The demurrage clause should identify the rate, currency, payment trigger, due date, calculation unit, pro rata treatment, and whether the demurrage period is capped. If the printed form contains an old limitation on days on demurrage, it should be deleted or amended if the parties intend demurrage to continue until completion.

Exceptions should state whether they apply to laytime only or also to time on demurrage. Phrases such as “time lost shall not count as laytime or demurrage” are far safer than general wording that leaves the effect to argument. If consequential delay after a strike, ice event, or port closure is intended to be protected, the clause should say whether it covers only the event itself or the delay caused by the event.

The charterparty should also define which documents must support a demurrage claim and when they must be submitted. Owners should avoid waiting until the last day of the claim period. Charterers should review claims promptly and identify missing essential documents before the time-bar dispute becomes entangled with the merits.

Where charterers are expected to arrange payment through receivers, sub-charterers, or cargo interests, the charterparty should state whether the charterer remains liable. If the shipowner relies on a lien, the lien clause should cover demurrage, damages for detention, freight, deadfreight, and relevant expenses where commercially agreed.

Finally, parties should address detention expressly. If delay before laytime, after loading, after discharge, or outside ordinary cargo operations is to be compensated at the demurrage rate, the clause should state that. If damages at large are preserved for particular breaches, the wording should say so with equal clarity.

Conclusion

Demurrage is one of the most commercially important mechanisms in a voyage charterparty because it converts loading and discharging delay into an agreed daily financial liability. Its operation depends on the laytime calculation, the validity of notice of readiness, the scope of exceptions, the effect of owner’s fault, and the documents required to support the claim.

The basic rule is simple: after laytime expires, demurrage runs at the agreed rate. The difficult questions arise at the edges—whether an exception continues after demurrage begins, whether the shipowner caused the delay, whether a time-bar has extinguished the claim, whether a separate detention claim is available, and whether bill of lading holders or receivers can be pursued.

Careful drafting reduces these disputes. A professional demurrage clause should make clear when liability begins, how the daily rate is applied, what interrupts the clock, when payment is due, what documents are required, and whether demurrage is the exclusive remedy for delay. Without that precision, demurrage remains fertile ground for expensive argument long after the cargo has been delivered.