Demurrage
Demurrage is the financial penalty a charterer or cargo owner pays to a shipowner when a vessel is detained beyond the agreed loading or unloading time. It is one of the most consistently disputed line items in maritime commerce and one of the first terms any freight professional encounters.
What It Is
When a shipowner charters a vessel to a cargo owner or operator, the charter party — the governing contract — specifies a period called laytime: the time allowed for loading and discharging cargo without additional charge. If the charterer uses more than the allocated laytime, the ship sits idle beyond the agreed window. The shipowner loses potential revenue from other voyages. Demurrage is the compensation for that delay.
Demurrage rates are negotiated in the charter party and expressed as a daily rate — a fixed sum per day or pro-rated per hour for partial days. The rate varies by vessel type, market conditions, and route. For a large crude tanker (VLCC) in a tight market, demurrage can run $50,000–$100,000 per day or more. For smaller bulk carriers, rates might be a few thousand dollars per day.
The inverse also exists: if the charterer loads or discharges faster than the allowed laytime, the shipowner may owe the charterer a payment called despatch — typically half the demurrage rate for time saved. This incentive rewards efficient port operations.
Disputes about whether demurrage is owed, and for how much, generate a substantial volume of maritime arbitration. Common disputes: whether laytime began when the vessel arrived at the port or when it berthed; whether bad weather or port congestion suspends laytime counting; and whether the cargo owner or the terminal operator bears responsibility for delays.
Etymology
The word derives from Old French demorer and Latin demorari — to delay, to linger. In maritime legal usage it appears in English from at least the seventeenth century, when charter parties were beginning to be standardized through Lloyd’s and the London maritime market. The related term demur — to object or hesitate — shares the same root.
A Concrete Example
A charterer books a bulk carrier to load grain at a Gulf Coast port. The charter party allows five days of laytime at a demurrage rate of $15,000/day. Due to a delay at the grain elevator — congestion from a prior vessel — loading takes seven days. The charterer owes two days of demurrage: $30,000. Whether the elevator operator or the charterer absorbs that cost depends on their separate commercial agreement.
Common Misconception
Demurrage is often confused with detention — a related but distinct charge that applies in container shipping when a shipper holds a container beyond a free period outside the terminal. Demurrage in container shipping specifically refers to charges for keeping a container inside the terminal beyond allowed free time. The terminology is used inconsistently across carriers and regions, making it a persistent source of commercial disputes.