Container detention vs demurrage: plan the actual clock

Which clock are you reading?

A carrier’s demurrage commonly concerns its container remaining inside a port, terminal or depot beyond agreed free time. Detention commonly concerns the carrier’s equipment outside that location after gate-out. Some contracts combine the clocks; terminal storage can be separate. The controlling definitions are the carrier’s contract and applicable local terms, not a generic website example.

Build a shipment-specific timeline

Record discharge or availability, free-time start, customs release, carrier release, gate-out, unloading and empty return. Put the contractual expiry and tariff next to each event. If a charge is disputed, the record should show actual documents, timestamps and notices, not an assumed cause.

• Carrier and terminal terms for this booking
• Free days and the event that starts each clock
• Daily rate bands and currency
• Last free day and expected release or return
• Owner for unresolved customs, line and transport tasks

Common planning mistakes

Do not assume that Out of Charge ends all charges; delivery and empty return may still be pending. Do not copy free days from a previous booking, assume weekends are excluded, or mix vessel laytime with container equipment terms. A release forecast should be updated when Customs, carrier or terminal instructions change.

Use the number to plan, not to promise

A simple exposure estimate may help prioritise tasks, but it must use the actual carrier tariff and the correct charge period. Motumal can help coordinate the clearance milestones; the carrier and terminal set their own commercial terms.