Demurrage is charged by the terminal for containers that stay in the port beyond their free time. Detention is charged by the carrier for equipment kept outside the port too long. Both are avoidable, and both are usually the result of work that could have started weeks earlier.
1. Check documents before the goods sail
The commercial invoice, packing list, certificate of origin and bill of lading must describe the same goods in the same terms. A discrepancy discovered at the port costs days. The same discrepancy discovered at origin costs an email.
2. Confirm the HS classification early
Classification determines duty rate and which approvals apply. Getting it wrong means an amended declaration, and amendments are slower than original filings.
3. Arrange conformity certificates at PO stage
SABER, SASO and SFDA approvals take weeks, not days. Start them when the purchase order is raised and the certificate will be waiting when the vessel arrives.
4. Know your free time before you book
Free time varies by carrier, trade lane and contract, typically seven to fourteen days. On cargo you know will clear slowly, negotiating extended free time at booking is far cheaper than paying for the overrun afterwards.
5. Pre-position the delivery
Arrange the truck before the release, not after. A container cleared on Wednesday with no transport booked until Sunday has spent four days earning charges for someone else.
6. Return empties promptly
Detention runs until the empty container is back at the nominated depot. Plan the return leg into the delivery schedule rather than treating it as an afterthought.
Every hour of demurrage was bought weeks earlier by a decision to deal with the paperwork later.
