What is Demurrage?

Demurrage is a charge for cargo or a rail car held at a terminal past its free time, billed by the party that owns the terminal or the car.

Demurrage arrives on a road operation as somebody else's charge: written under a terminal's schedule or a railroad's tariff, accruing while your truck is nowhere near the freight, landing weeks later on a drayage bill. Knowing which clock produced it is the difference between paying it and pricing it into the move.

Where demurrage reaches a road operation

The contact point is the drayage leg: the short container move between a marine terminal or rail ramp and an inland facility, and the leg mid-mile planning schedules around somebody else's gate hours.

On the rail side the charge has a statutory job. A rail carrier under the Surface Transportation Board's jurisdiction has to compute demurrage charges, and write the rules around them, in a way that serves the national need for freight-car use and distribution and for an adequate supply of cars available to move property^{[rail-demurrage]}. Read that as what demurrage is for: a car-supply instrument, not a service anyone bought. The railroad is not selling storage; it prices the absence of its car.

At a marine terminal the same word attaches to the cargo rather than the vehicle, and that side belongs to the Federal Maritime Commission and the port — neither of which Shyftbase touches. It reaches the road anyway: the drayage carrier who could not get an appointment is holding the container when the clock runs out.

Who is billed, and what starts the clock

Free time is the allowance the terminal's schedule or the carrier's tariff grants before the charge begins. It runs from the day the cargo or the car is made available, counted in days rather than hours, and usually excludes days the facility does not work. When it expires, demurrage accrues by the day, per container or per car, until the freight leaves.

Who gets the invoice is a question of tariff and contract, not of fault. The party the facility holds the freight for is the party billed — which is why a delay at a closed receiving dock surfaces as a charge against the carrier or the cargo owner. Once it reaches you as a pass-through on a freight bill it is no longer a terminal charge but an accessorial under your own agreement: what a rate confirmation commits you to is where the right to bill it should have been written, and accessorial charges is the line it lands on. That change of document starts a different clock: outside household goods and noncontiguous domestic trade, a motor carrier has to bill charges beyond those first billed within 180 days of the payer receiving the original bill to keep the right to collect, and the payer has 180 days to contest it^{[motor-billing]}.

What a dispute turns on

The rail argument is about reasonableness: a rail carrier has to establish reasonable rules and practices on matters related to the transportation it provides^{[rail-practices]}, and a charge for days the railroad itself could not work is where that language gets used. The ocean argument has moved to the invoice. The Shipping Act now requires a demurrage or detention invoice to carry specified information — when the container was made available, the free time allowed and its start and end dates, the rule the daily rate comes from, the total due — and failure to include it eliminates any obligation of the charged party to pay the charge^{[ocean-invoice]}. Nothing equivalent governs it on a motor carrier's bill.

The everyday case, though, is settled on records rather than rules: when an appointment was offered, when the gate took the truck and when it left. A track and trace record is where those timestamps come from, and Shyftbase rates completed services against each contract's own table, so automated freight billing either evidences a pass-through or gives you grounds to drop it.

The limits of this definition

The contract outranks the dictionary. How much free time you get, what a day costs after it, whether weekends count and who is invoiced are set by the terminal's schedule, the tariff or your own agreement. Where the schedule and this page disagree, the schedule wins.

The word moves with the mode. Demurrage is a rail and maritime term. In road freight the same waiting is a detention charge, billed on the carrier's equipment and the driver with it rather than on cargo in a facility, which is why the freight glossary keeps the two apart.

This is a boundary, not a capability. Shyftbase runs land-based freight: no air, no ocean, no port or customs work. The entry exists because the charge reaches a road operation as a pass-through somebody has to check and pay, not because the platform manages terminal free time.

A definition does not decide who pays. Demurrage is often owed to a party you have no contract with, under a schedule you never signed. Naming it tells you which document to read and which clock to evidence; it does not make the charge go away.