Demurrage and Dispatch in Bulk Commodity Shipping
Quote from chief_editor on June 9, 2026, 5:30 pmHow demurrage and dispatch work in dry bulk charter parties, how laytime is calculated, and why NOR validity and statement of facts are the central evidence in disputes.
Demurrage is the penalty payable by the charterer to the vessel owner when loading or discharging takes longer than the agreed laytime. It compensates the vessel owner for the commercial cost of the ship sitting idle beyond the time that was factored into the freight rate. Dispatch is the reverse: a payment from the vessel owner to the charterer when loading or discharging is completed faster than the allowed laytime. Dispatch is typically set at half the demurrage rate. Together, these two mechanisms convert vessel time into a shared financial incentive for both parties to complete cargo operations efficiently.
In dry bulk commodity trade, demurrage is one of the most contested cost items in a transaction. It arises regularly because loading and discharge operations depend on terminal capacity, cargo availability, weather conditions, vessel sequencing, and port administration—variables that neither the charterer nor the vessel owner fully controls.
How Laytime and Demurrage Are Calculated
Laytime begins when the vessel is in the agreed position, ready to load or discharge, and the master has tendered a notice of readiness (NOR) to the charterer or their agent. The NOR must typically be tendered in writing within specified hours of arrival, and its validity is frequently contested: if the vessel tendered NOR before being granted free pratique (port health clearance) or before the berth was accessible, the charter party terms determine whether laytime counted from the tender or from a later trigger event.
The laytime clock counts time in accordance with the charter party terms. SHEX (Sundays and holidays excepted) means those days are excluded from the laytime count. SHINC (Sundays and holidays included) means they are counted. WIBON (whether in berth or not) means laytime counts from the time NOR is tendered even if the vessel is still at anchorage waiting for a berth. WIPON (whether in port or not) is broader still. These acronyms appear throughout standard charter party forms and their precise interpretation has generated extensive case law in English and Norwegian maritime courts.
The statement of facts is the primary document for calculating laytime and demurrage. It records, hour by hour, when cargo operations were underway, when they were suspended, why they stopped, and when NOR was tendered and accepted. The statement of facts is prepared by the vessel's port agent and typically signed by both the agent and the ship's master. Disputes about demurrage amounts almost always trace back to disputes about what the statement of facts should have recorded.
Common Demurrage Disputes and Their Causes
Port congestion is a recurring trigger. When a vessel waits at anchorage because no berth is available, whether laytime counts during that waiting period depends on the charter party's berth and port provisions. A charterer who accepts WIBON language on a congested route may find laytime charges accumulating before operations begin, with no ability to accelerate berth assignment.
NOR validity disputes arise when the vessel was not technically ready to load at the time of tender—holds failed inspection, documentation was incomplete, or the vessel was not in the contractual arrival position. If NOR was invalid, laytime did not start from that tender, and the calculation must be restarted from the valid tender. Charterers who discover a hold inspection failure after laytime has commenced will argue that the laytime clock should never have started.
Responsibility for delay is frequently the core issue. A delay caused by a port equipment breakdown, a customs hold, or a terminal scheduling conflict does not automatically suspend laytime unless the charter party specifically excepts those causes. Many charter parties are silent on terminal equipment failure, meaning that when the loading conveyor breaks down, time counts against the charterer's laytime allowance even though the charterer had no ability to prevent the delay.
Demurrage claims must typically be submitted within a defined period after the vessel's departure from the final discharge port—often 90 days under standard charter party forms. Failure to submit on time can bar the claim. Charterers who receive a demurrage claim should verify the calculation against the statement of facts and the charter party terms before paying. Errors in laytime calculations are common, and the difference between accepting a claim as presented and calculating it correctly can be significant on a large cargo.
How demurrage and dispatch work in dry bulk charter parties, how laytime is calculated, and why NOR validity and statement of facts are the central evidence in disputes.
Demurrage is the penalty payable by the charterer to the vessel owner when loading or discharging takes longer than the agreed laytime. It compensates the vessel owner for the commercial cost of the ship sitting idle beyond the time that was factored into the freight rate. Dispatch is the reverse: a payment from the vessel owner to the charterer when loading or discharging is completed faster than the allowed laytime. Dispatch is typically set at half the demurrage rate. Together, these two mechanisms convert vessel time into a shared financial incentive for both parties to complete cargo operations efficiently.
In dry bulk commodity trade, demurrage is one of the most contested cost items in a transaction. It arises regularly because loading and discharge operations depend on terminal capacity, cargo availability, weather conditions, vessel sequencing, and port administration—variables that neither the charterer nor the vessel owner fully controls.
How Laytime and Demurrage Are Calculated
Laytime begins when the vessel is in the agreed position, ready to load or discharge, and the master has tendered a notice of readiness (NOR) to the charterer or their agent. The NOR must typically be tendered in writing within specified hours of arrival, and its validity is frequently contested: if the vessel tendered NOR before being granted free pratique (port health clearance) or before the berth was accessible, the charter party terms determine whether laytime counted from the tender or from a later trigger event.
The laytime clock counts time in accordance with the charter party terms. SHEX (Sundays and holidays excepted) means those days are excluded from the laytime count. SHINC (Sundays and holidays included) means they are counted. WIBON (whether in berth or not) means laytime counts from the time NOR is tendered even if the vessel is still at anchorage waiting for a berth. WIPON (whether in port or not) is broader still. These acronyms appear throughout standard charter party forms and their precise interpretation has generated extensive case law in English and Norwegian maritime courts.
The statement of facts is the primary document for calculating laytime and demurrage. It records, hour by hour, when cargo operations were underway, when they were suspended, why they stopped, and when NOR was tendered and accepted. The statement of facts is prepared by the vessel's port agent and typically signed by both the agent and the ship's master. Disputes about demurrage amounts almost always trace back to disputes about what the statement of facts should have recorded.
Common Demurrage Disputes and Their Causes
Port congestion is a recurring trigger. When a vessel waits at anchorage because no berth is available, whether laytime counts during that waiting period depends on the charter party's berth and port provisions. A charterer who accepts WIBON language on a congested route may find laytime charges accumulating before operations begin, with no ability to accelerate berth assignment.
NOR validity disputes arise when the vessel was not technically ready to load at the time of tender—holds failed inspection, documentation was incomplete, or the vessel was not in the contractual arrival position. If NOR was invalid, laytime did not start from that tender, and the calculation must be restarted from the valid tender. Charterers who discover a hold inspection failure after laytime has commenced will argue that the laytime clock should never have started.
Responsibility for delay is frequently the core issue. A delay caused by a port equipment breakdown, a customs hold, or a terminal scheduling conflict does not automatically suspend laytime unless the charter party specifically excepts those causes. Many charter parties are silent on terminal equipment failure, meaning that when the loading conveyor breaks down, time counts against the charterer's laytime allowance even though the charterer had no ability to prevent the delay.
Demurrage claims must typically be submitted within a defined period after the vessel's departure from the final discharge port—often 90 days under standard charter party forms. Failure to submit on time can bar the claim. Charterers who receive a demurrage claim should verify the calculation against the statement of facts and the charter party terms before paying. Errors in laytime calculations are common, and the difference between accepting a claim as presented and calculating it correctly can be significant on a large cargo.