What is Demurrage in Commodity Shipping?

Demurrage is a penalty charge paid to the vessel owner when loading or discharging takes longer than the agreed laytime (the time allowed in the charter party for these operations). Laytime is typically expressed in days or hours, calculated based on the cargo quantity and the agreed loading/discharge rate (e.g., '10,000 tonnes per day').

Demurrage rates vary by vessel size: Capesize vessels can charge $15,000-40,000 per day, Panamax $10,000-25,000, and Supramax $8,000-18,000. These rates are agreed in the charter party and reflect the opportunity cost to the vessel owner of having their ship idle. Even a few days of demurrage can add $50,000-200,000 to a commodity trade's cost.

Port congestion is the most common cause of demurrage — if a vessel arrives and must wait at anchorage for a berth, the waiting time may count against laytime depending on the contract terms. Slow loading/discharge due to equipment breakdowns, labor issues, or weather also causes demurrage. Customs delays, inspection holdups, and incomplete documentation can prevent operations from starting.

For commodity traders, the party responsible for demurrage depends on the Incoterm and specific contract provisions. Under FOB, the buyer (who chartered the vessel) typically bears demurrage risk at both loading and discharge. Under CIF, the seller bears demurrage at loading but may pass discharge demurrage to the buyer.

Plan ahead — ensure cargo is ready before the vessel arrives, documentation is complete, and port capacity is available. Negotiate favorable laytime terms in the charter party, including weather working days only (WWDO) clauses that exclude bad weather from laytime calculation.

Monitor vessel positions and port congestion in real time using maritime tracking services. If delays are expected, communicate early with all parties. Despatch (the opposite of demurrage — a reward for completing operations faster than allowed) incentivizes efficiency. Good relationships with port authorities and stevedores can help prioritize your operations.