Laytime, Demurrage, and Despatch in Ship Chartering Explained

What Is Laytime?

Laytime is the agreed period allowed to the Charterer for loading and/or discharging cargo under a voyage charterparty without paying any additional compensation to the Shipowner beyond the agreed freight. In practical chartering terms, laytime is the time bought by the Charterer as part of the freight bargain for carrying out cargo operations at the loading and discharging ports.

Laytime is one of the most important commercial mechanisms in voyage chartering because the Shipowner’s freight calculation depends heavily on how long the ship is expected to remain occupied by the voyage. A voyage estimate normally takes account of the approach voyage, port time, loading time, sea passage, discharging time, bunkers, port costs, canal dues, commissions, and the expected daily earning of the ship. If the Charterer uses more port time than agreed, the ship is detained beyond the period included in the freight calculation.

For laytime to begin, the charterparty usually requires several conditions to be satisfied. The ship must have reached the contractual destination, must be physically and legally ready to load or discharge, and must tender a valid Notice of Readiness (NOR) in accordance with the charterparty. Depending on the wording, laytime may begin immediately, after a fixed number of hours, or at a specified time after a valid Notice of Readiness (NOR) has been tendered and accepted or is deemed accepted.

Laytime is not simply “time in port.” A ship may be waiting at anchorage, shifting berth, undergoing inspection, or experiencing bad weather, but whether that time counts depends on the precise charterparty wording. For this reason, laytime clauses must be read together with clauses dealing with Notice of Readiness (NOR), berth or port charter terms, weather working days, Sundays and holidays, strikes, congestion, shifting, exceptions, interruptions, and demurrage.

Commercial Purpose of Laytime

The commercial purpose of laytime is to allocate the time risk of loading and discharging cargo between Shipowner and Charterer. The Shipowner agrees to make the ship available for cargo operations for a stated period. The Charterer agrees to complete loading and discharging within that stated period. If the Charterer completes operations within the agreed time, the freight bargain has been performed as expected. If the Charterer takes longer, the Shipowner is deprived of the ship’s earning capacity for the excess period.

In dry bulk shipping, the Shipowner usually has limited control over the speed of cargo operations. Loading and discharging rates depend on cargo availability, terminal equipment, shore labor, port congestion, weather, receivers, shippers, surveyors, customs, and local port practice. Laytime therefore provides a contractual method for measuring how much time the Charterer may use before financial consequences arise.

For example, if freight is agreed on the assumption that loading and discharging together will take five days, but the Charterer’s cargo operations take ten days, the Shipowner loses five additional days that could have been used for another employment. Laytime and demurrage clauses are designed to avoid uncertainty by stating in advance how time is counted and what compensation is payable if the agreed time is exceeded.

How Laytime Starts

Laytime normally starts only after a valid Notice of Readiness (NOR) has been tendered. A valid Notice of Readiness (NOR) generally requires the ship to be an arrived ship under the charterparty, ready in all respects to load or discharge the nominated cargo, and compliant with documentary and legal requirements needed for cargo operations. If the ship is not ready, the Notice of Readiness (NOR) may be invalid unless the charterparty contains wording that protects the Shipowner in specific circumstances.

The question of arrival depends on whether the charterparty is a port charter or a berth charter. In a port charter, the ship may be able to tender Notice of Readiness (NOR) when she has reached the port or a customary waiting place within the port area, provided she is at the immediate and effective disposition of the Charterer. In a berth charter, the ship usually must reach the named berth before Notice of Readiness (NOR) can be validly tendered, unless the charterparty contains special wording such as “whether in berth or not” or “whether in free pratique or not.”

Readiness has both physical and legal elements. Physical readiness means the ship is practically ready to receive or deliver the cargo, with cargo spaces, gear, tanks, hatches, pumps, or other relevant equipment fit for the operation. Legal readiness may involve customs clearance, free pratique, port authority formalities, security compliance, certificates, and other permissions required before loading or discharging can proceed.

How Laytime Is Calculated

Laytime may be expressed in days, hours, running days, working days, weather working days, or by reference to loading and discharging rates. In dry bulk chartering, it is common to see provisions such as “10,000 metric tons per weather working day” or “5 weather working days, Sundays and holidays excepted.” The calculation must follow the exact words used in the charterparty.

When laytime is calculated by cargo rate, the total cargo quantity is divided by the agreed loading or discharging rate. If a ship loads 50,000 metric tons and the charterparty allows loading at 10,000 metric tons per weather working day, the loading laytime is five weather working days. If the clause provides a separate discharging rate, discharging laytime must be calculated separately unless the laytime is reversible.

The Statement of Facts, port logs, Notice of Readiness (NOR), time sheets, weather records, stoppage reports, and surveyor notes are essential documents for laytime calculation. Even small differences in time recording can create significant demurrage or despatch consequences, especially where the daily demurrage rate is high.

What Is Demurrage?

Demurrage is the agreed amount payable by the Charterer to the Shipowner when the Charterer uses more time for loading and/or discharging than the laytime allowed under the charterparty. Demurrage compensates the Shipowner for the detention of the ship after laytime has expired, provided the delay is not caused by the Shipowner or by a matter that the charterparty excludes from demurrage.

In legal and commercial practice, demurrage is usually treated as Liquidated Damages. This means the parties agree in advance how much is payable for each day or part of a day by which the ship is detained beyond laytime. The agreed rate avoids the need to prove the Shipowner’s actual loss for every hour of delay. The demurrage rate may reflect the ship’s daily running cost, market earning level, expected Time Charter Equivalent, bargaining strength, cargo type, port risk, and freight market conditions at the time of fixing.

Demurrage is normally stated as a daily amount, for example “demurrage USD 20,000 per day pro rata.” If the ship is on demurrage for 36 hours at that rate, the amount payable would be USD 30,000. Unless the charterparty states otherwise, demurrage is usually calculated pro rata for part of a day.

When Does Demurrage Begin?

Demurrage begins when the laytime allowed under the charterparty has been exhausted and cargo operations or charterer-related detention continue. The point at which laytime expires must be calculated carefully. A mistake in the start of laytime, an incorrect treatment of weather interruptions, or a wrong assumption about Sundays and holidays can change the demurrage result.

Once a ship is on demurrage, many charterparty systems apply the principle commonly summarized as “once on demurrage, always on demurrage.” This means that ordinary laytime exceptions may no longer interrupt the running of demurrage unless the charterparty expressly provides otherwise. However, this phrase is not a substitute for reading the charterparty. Some clauses expressly stop or suspend demurrage for specified events, while others only stop laytime before demurrage has begun.

Common causes of demurrage include late cargo arrival, slow loading, slow discharging, lack of storage space ashore, congestion attributable to the charterparty risk allocation, delay in cargo documents, receiver delays, customs delays, berth unavailability, and operational inefficiency at the terminal. Whether the Charterer is liable depends on the charterparty wording and the facts causing the delay.

What Is Despatch?

Despatch is money payable by the Shipowner to the Charterer when loading or discharging is completed in less time than the laytime allowed, provided the charterparty expressly gives the Charterer a right to despatch. Despatch is a contractual reward for quick cargo operations and faster release of the ship.

Despatch is common in dry cargo chartering but is generally not a normal feature of tanker chartering. In dry bulk voyage charters, despatch is often agreed at half the demurrage rate, commonly expressed as DESPATCH HALF DEMURRAGE DHD or D1/2D. However, parties are free to agree another rate or to exclude despatch completely.

Despatch can be calculated on “all time saved” or “working time saved,” depending on the charterparty. This distinction is important. If despatch is payable on all time saved, the calculation may include periods that would not have counted as laytime, such as Sundays, holidays, or bad weather, depending on the wording. If despatch is payable only on working time saved, the calculation is narrower and focuses on time that would have counted as laytime if operations had continued.

Demurrage and Despatch Compared

Demurrage and despatch are opposite commercial consequences of laytime performance. Demurrage is payable by the Charterer when the Charterer exceeds the agreed laytime. Despatch is payable by the Shipowner when the Charterer saves laytime, if the charterparty grants that right.

Demurrage protects the Shipowner against delay. Despatch rewards the Charterer for efficiency. Demurrage is therefore a cost of slow cargo operations, while despatch is a benefit of fast cargo operations. Both depend on accurate time calculation, precise event records, and careful application of the charterparty wording.

In negotiation, Shipowners may prefer no despatch or a low despatch rate, while Charterers often prefer despatch at half demurrage or better. The agreed balance forms part of the overall freight bargain. A lower freight rate may be linked to stricter laytime and demurrage terms, while a higher freight rate may reflect greater operational flexibility.

What Is Reversible Laytime?

Reversible laytime means that the laytime allowed for loading and discharging is combined into one overall time allowance. Time saved at the loading port may be used at the discharging port, and time saved at the discharging port may offset time used at the loading port, depending on the sequence and the charterparty wording.

Reversible laytime is useful for Charterers because it gives operational flexibility. A Charterer who loads quickly can preserve additional time for discharge. Equally, if loading is slow but discharge is fast, the total position may still avoid demurrage if the combined laytime is not exceeded.

For Shipowners, reversible laytime may reduce the chance of early demurrage at one port because saved time at another port can be credited to the Charterer. Shipowners should therefore consider the total expected port performance before agreeing to reversible laytime, especially where one port is efficient and the other is known for congestion or slow cargo handling.

Reversible Laytime Example

Assume a ship is chartered to load at Port A and discharge at Port B. The charterparty allows 48 hours for loading and 72 hours for discharging. If laytime is reversible, the total allowed laytime is 120 hours.

1. Loading: Loading is completed in 36 hours. The Charterer saves 12 hours against the loading allowance.
2. Discharging: The saved 12 hours may be added to the discharging allowance, so the Charterer effectively has 84 hours available for discharge.
3. Final Position: If discharge is completed within 84 hours, no demurrage is payable. If discharge takes longer than 84 hours, demurrage begins after the total reversible allowance has been exhausted.

This example shows why reversible laytime must be calculated across the voyage as a whole rather than treating each port in isolation.

What Is Non-Reversible Laytime?

Non-reversible laytime means that loading time and discharging time are separate. Time saved at the loading port cannot be transferred to the discharging port, and time saved at the discharging port cannot be used to cure excess time at the loading port. Each operation has its own independent laytime account.

Non-reversible laytime is more protective for the Shipowner because the Charterer cannot use good performance at one port to offset poor performance at another port. For Charterers, it is less flexible and may result in demurrage at one port even if time was saved elsewhere.

Non-Reversible Laytime Example

Assume a charterparty allows five days for loading and five days for discharging, with laytime expressly stated to be non-reversible.

1. Loading: Loading is completed in four days, so one day is saved at the loading port.
2. Discharging: Discharging takes six days, exceeding the discharging allowance by one day.
3. Final Position: Because laytime is non-reversible, the one day saved at loading cannot be transferred to discharge. The Charterer must pay one day of demurrage at the discharging port, unless another charterparty exception applies.

If the same facts occurred under reversible laytime, the one day saved at loading could usually offset the extra day used at discharge, leaving no demurrage payable.

Laytime Exceptions and Interruptions

Laytime exceptions and interruptions determine whether particular periods count against the Charterer’s laytime. Common examples include bad weather, Sundays and holidays, strikes, breakdown of ship’s gear, port authority restrictions, force majeure events, shifting time, opening and closing hatches, draught surveys, and stoppages caused by the Shipowner.

The effect of these events depends entirely on the charterparty wording. A clause stating “weather working days” is different from a clause stating “weather permitting.” A clause excluding “Sundays and holidays” may operate differently depending on whether work is actually performed. A clause stating “unless used” may cause time to count if cargo operations continue during an otherwise excluded period.

For this reason, laytime should never be calculated from a general idea of fairness. It must be calculated from the contract. The Statement of Facts should accurately record when cargo operations started, stopped, and resumed, and why any interruption occurred.

Laycan, Laydays, and Cancelling

Laycan is the agreed window during which the ship must present herself at the loading port. It is usually made up of the first layday and the cancelling date. If the ship arrives before the laycan starts, the Charterer may not be obliged to load immediately unless the charterparty or local practice provides otherwise. If the ship arrives after the cancelling date, the Charterer may have the right to cancel the charterparty.

Laycan is different from laytime. Laycan concerns the ship’s arrival window. Laytime concerns the time allowed for cargo operations after a valid Notice of Readiness (NOR) has been tendered and laytime has started. Confusing these concepts can lead to disputes over cancellation rights, commencement of laytime, and demurrage exposure.

Documents Used in Laytime and Demurrage Claims

A demurrage or despatch claim normally depends on documentary evidence. The most important documents include the charterparty, recap, Notice of Readiness (NOR), Statement of Facts, time sheet, mate’s receipts, Bills of Lading (B/L), port log, weather reports, survey reports, terminal records, letters of protest, and correspondence between agents, Shipowner, Charterer, shipper, receiver, and brokers.

The Statement of Facts is especially important because it records the chronological history of the ship’s port stay. However, a Statement of Facts is not automatically conclusive. If the Statement of Facts is inaccurate, incomplete, unsigned, contradicted by other documents, or prepared under protest, the parties may dispute it. Clear remarks and timely letters of protest can protect a party’s position.

Common Laytime and Demurrage Disputes

Laytime and demurrage disputes frequently arise from uncertainty about when the ship became an arrived ship, whether the Notice of Readiness (NOR) was valid, whether the ship was ready in all respects, whether free pratique or customs clearance was required before Notice of Readiness (NOR), whether berth congestion counted, whether bad weather stopped laytime, whether the ship was on demurrage before an exception occurred, and whether despatch should be calculated on all time saved or working time saved.

Disputes also arise when cargo is unavailable, receivers are not ready, documents are delayed, cargo is rejected, holds are found unclean after Notice of Readiness (NOR), cranes or shore equipment fail, or the ship is ordered to shift between berths. Each event must be matched against the charterparty wording to determine whether time counts, is excepted, is interrupted, or falls on demurrage.

Practical Chartering Importance

Laytime, demurrage, and despatch are not minor accounting items. They can determine whether a voyage is profitable or loss-making. In strong freight markets, a ship detained for several days may lose valuable follow-on employment. In weak markets, demurrage may represent an important part of the voyage return. For Charterers, unexpected demurrage can damage the economics of a cargo sale and create disputes with shippers, receivers, terminals, and traders.

Clear drafting is therefore essential. The charterparty should state the laytime allowance, loading and discharging rates, whether laytime is reversible or non-reversible, when laytime begins, whether Notice of Readiness (NOR) may be tendered at anchorage, how weather and holidays are treated, whether despatch is payable, whether despatch is calculated on all time saved or working time saved, the demurrage rate, the claim documentation required, and the time limit for submitting demurrage claims.

Summary of Laytime, Demurrage, and Despatch

Laytime is the agreed time allowed to the Charterer for loading and discharging without additional payment beyond freight. Demurrage is the agreed compensation payable to the Shipowner when the Charterer exceeds that allowed time. Despatch is the agreed reward payable to the Charterer for completing cargo operations faster than the allowed time, if the charterparty provides for it.

Together, these three concepts form one of the central economic structures of voyage chartering. They allocate port-time risk, encourage efficient cargo operations, and provide a predictable method for dealing with delay. The final result always depends on the charterparty wording, the facts recorded during the port stay, and the proper application of laytime calculation principles.