Laytime and demurrage sit at the heart of almost every dry bulk voyage charter, yet they remain among the most misunderstood terms in the fixture. For charterers weighing port performance against contractual allowances, and for owners tracking a vessel's time in port, a clear grasp of how laytime starts, runs and ends is essential. This article sets out the mechanics in plain terms: what laytime is, how notice of readiness triggers it, how demurrage and despatch are calculated, and where disputes commonly arise. It is intended as a factual overview rather than legal guidance; the governing charterparty always takes precedence.
What Is Laytime?
Laytime is the period of time agreed in the charterparty during which the charterer may load or discharge the cargo without incurring additional cost beyond the freight already agreed. It is typically expressed in running days, weather working days, or another defined unit, and can be fixed as a set number of days or calculated from an agreed loading or discharging rate applied to the cargo quantity. The precise formula, and which exceptions apply to it, is set out in the charterparty and can vary considerably between fixtures and trades.
In commercial terms, laytime is a way of allocating risk between the two parties. Within the agreed allowance, the charterer carries the consequences of slow cargo operations, congested berths or documentation delays. Once that allowance is used up, the balance of risk shifts, and the owner is compensated for the vessel's extra time in port through demurrage. This is why the precise start and stop points of laytime matter so much to both sides.
Notice of Readiness: What It Is and Why It Matters
Notice of readiness, usually abbreviated to NOR, is the master's formal notification that the vessel has arrived at the agreed place, typically the port or a specified location within it, and is ready in all respects to load or discharge. It is generally tendered to the charterer, shipper, receiver or their agents within the laycan window set out in the charterparty. Depending on the terms agreed, NOR may need to be tendered at the berth itself, or, under clauses such as "whether in berth or not" (WIBON) or "whether in port or not" (WIPON), from the roads or anchorage before a berth becomes available.
For NOR to be valid, the vessel generally needs to be genuinely ready: holds prepared for the intended cargo, documentation on board, and free pratique either granted or in the process of being granted, depending on the charterparty wording. Charterparties commonly build in a period between the tendering of NOR and the actual commencement of laytime, sometimes referred to as turn time, to allow for administrative and practical formalities. Whether a given NOR is accepted, rejected or accepted with reservation can materially affect when laytime is deemed to begin, which is why its wording and timing are treated with such care in practice.
How Laytime Is Calculated
Once laytime commences, it generally runs continuously until loading or discharging is completed, subject to any exceptions agreed in the charterparty. Common exceptions relate to weather that prevents cargo operations, and to Sundays and holidays, which may be included or excluded depending on whether the charterparty is agreed on a SHINC (Sundays and holidays included) or SHEX (Sundays and holidays excluded) basis. Some charterparties treat laytime for loading and discharging separately, while others allow it to be calculated reversibly, so that time saved at one port can offset time used at the other.
The practical record of what happened in port, from arrival and NOR tendering through berthing to the commencement and completion of cargo operations, and any interruptions along the way, is captured in the statement of facts, or time sheet. This document, usually agreed jointly by the master, agents and charterer's representatives at the time, forms the basis on which laytime is subsequently calculated and any demurrage or despatch settled.
Demurrage and Despatch
Demurrage is the amount payable by the charterer to the owner when the agreed laytime is exceeded. It is generally treated as liquidated damages, meaning a rate agreed in advance in the charterparty, rather than a sum that needs to be separately proven as a loss. Despatch, sometimes called despatch money, works in the opposite direction: a payment from the owner to the charterer when loading or discharging is completed with time to spare against the laytime allowance. Despatch is often agreed at a proportion of the demurrage rate, though the exact terms are a matter for negotiation in each fixture.
The commercial purpose of this structure is to give both parties a clear incentive to keep cargo operations efficient. Because demurrage accrues at the contractual rate regardless of the owner's actual costs during the delay, and despatch is paid regardless of the charterer's actual savings, the mechanism functions as a straightforward, pre-agreed way of sharing the value, or the cost, of how quickly a vessel is turned around.
Where Disputes Commonly Arise
In practice, a number of recurring points give rise to uncertainty between owners and charterers. The validity and timing of NOR, particularly where a berth is not immediately available and WIBON or WIPON terms apply, is a frequent area of discussion. Weather interruptions, and how they are recorded and applied against laytime, are another. Port congestion, where a vessel waits at anchorage for an available berth, raises questions about whether that waiting time counts against laytime or falls outside it, depending on the charterparty wording.
Many of these points ultimately come down to how carefully events are recorded and how clearly the charterparty exceptions are drafted, since ambiguity in the statement of facts or in the laytime clause itself is often what turns a routine calculation into a disputed one. Commercial practice varies from fixture to fixture, so charterers and owners should always check the specific wording of their charterparty rather than relying on general custom.
Why This Matters for Charterers and Owners
Laytime, NOR and demurrage terms are negotiated as part of the fixture itself, alongside freight, laycan and other commercial terms, which is why they deserve the same attention as the headline rate. Understanding how these mechanisms interact with the wider structure of a voyage charter helps charterers and owners assess a fixture on its true, all-in terms rather than on freight alone. This is also where the day-to-day involvement of a shipbroker, as described in our overview of what a dry bulk shipbroker does, adds practical value, from the initial negotiation of laytime terms through to monitoring port performance during the voyage itself.
At ER Drybulk, our chartering desks in Rotterdam work fixtures where laytime, NOR and demurrage terms are agreed with the same care as freight and laycan. Whether you are fixing a single voyage or reviewing recurring port performance across a programme, we are glad to talk through how these terms are typically structured and what to look out for in your own charterparties.