Detention charges are fees a carrier levies when a container is kept outside the port or terminal — such as at the importer’s or exporter’s premises — beyond the allowed free time.
Detention charges are fees that a shipping line or carrier applies when a container is kept outside the port or terminal beyond the free time allowed. This typically happens when an importer takes a full container to their premises to unpack it, or an exporter holds an empty container to load it, for longer than the agreed period.
Detention is closely related to demurrage, but the two apply to different locations and are important to distinguish, because both can add unexpected cost to a shipment.
When a container is released from the terminal, the carrier allows a number of free days for the customer to use it — to move it to the warehouse, unpack the goods, and return the empty container (or, for exports, to collect an empty, load it and return it full). If the container is held beyond this free period, detention charges accrue, usually as a daily fee that grows the longer the container is retained.
The key difference is location. Demurrage applies to the time a container or cargo stays inside the port or terminal beyond free time. Detention applies to the time the container is held outside the terminal — at the importer's or exporter's premises — beyond the allowed period. In short, demurrage is about cargo sitting at the port, while detention is about the carrier's container being kept away from circulation.
Detention is largely preventable with good planning. Importers should arrange transport in advance, unpack containers quickly, and return the empty container within the free period. Exporters should collect, load and return containers promptly. Coordinating closely with a freight forwarder and negotiating sufficient free time with the carrier — especially for large FCL shipments — helps keep these costs down.
Responsibility depends on the agreed Incoterms and the contract between buyer and seller. In most cases, detention at the destination is borne by the importer, while any at origin falls on the exporter. Agreeing free-time terms and responsibilities in advance avoids disputes.
Detention charges apply when a container is kept outside the terminal beyond its free time, and — like demurrage — they can quietly erode a shipment's profitability. Understanding the difference between detention and demurrage, anticipating common causes, and planning transport and unpacking carefully allows importers and exporters to minimise these fees and keep their logistics efficient.