The Hidden Cost of Detention and Demurrage

Detention and demurrage rarely appear in a freight budget, because they are not freight. They appear later, as a line item nobody forecast, and they are frequently the largest controllable cost in an ocean programme.

The four causes worth auditing

Documents arriving after the cargo. If the bill of lading is not released before the vessel berths, the clock starts and nothing can be collected. This is a process problem, not a carrier problem.

Free time that was never negotiated. Standard free time is a default, not a fixed term. On volume lanes it is negotiable, and the negotiation costs nothing.

Chassis and haulage booked reactively. Booking drayage after arrival means competing for capacity at the moment demand peaks. Booking against the ETA — and rebooking against deviations — removes most of the exposure.

Warehouse receiving windows that do not match arrivals. A container that arrives on Friday afternoon into a site that receives Monday to Thursday will accrue charges for reasons that have nothing to do with shipping.

Measure it per container, not in total

A total is a number you flinch at. A per-container figure by lane, by carrier and by cause is a number you can act on. Once the causes are attributed, the pattern is usually stark: a small number of lanes and a small number of documentation gaps generate most of the charge.

What good looks like

An account with the four causes addressed typically sees accessorials fall by half to two thirds within two quarters. None of that requires a better rate. It requires the paperwork to move ahead of the freight, which is the same discipline that fixes customs queries, and for the same reason.