Key Takeaways
- Demurrage runs while the container sits at the terminal past its free time. Detention, billed as per diem, runs while carrier equipment stays out too long. One shipment can trip both.
- Free time is shrinking. Arrangements that once ran four or five business days now show up as three, so verify the allowance per shipment.
- Port Houston turned trucks in roughly 43 to 44 minutes in the week of October 19, 2026. A warehouse taking three hours is where exposure builds.
- Transloading into a domestic trailer stops the per diem clock, and cutting deadhead miles lowers fuel surcharge exposure at the same time.
- Under the Federal Maritime Commission rule, the billed party has at least 30 calendar days to request mitigation, refund or waiver.
Two Charges, Two Clocks
Demurrage is what the terminal charges when a container stays on terminal property past its allotted free time. Detention, sometimes billed as per diem, is what the ocean carrier charges when its container or chassis stays out in the field past the window. A full breakdown of how to avoid demurrage and detention charges covers where each clock starts. Both are time charges, which is why the fix is scheduling rather than negotiation.
Start With the Last Free Day
Lines that historically offered four or five business days are now writing shorter windows, including three day arrangements. Allowances vary by steamship line, equipment type, terminal and shipping agreement, and a berthing delay pushes everything downstream. A shipper planning around five days who actually holds three has lost two before anyone opens the file.
Port Houston’s Lynx portal carries container availability, vessel schedules, gate transactions, equipment details and holds across both Bayport and Barbours Cut. A pre-alert turns that data into protection, letting a drayage provider identify the Last Free Day before arrival and reserve capacity while capacity still exists.
A simple daily report does most of the work, carrying container number, steamship line, terminal, availability date, Last Free Day, delivery appointment, warehouse appointment and empty return location. Once the container is available and nothing has been arranged, free time is already burning. Shipments heading into a weekend or port holiday carry the most risk, since two closed days inside a three day window leave almost nothing.
The Warehouse Is Usually the Bottleneck
The truck can be ready, the container available, the driver on time. If the warehouse cannot receive it, the clock keeps running anyway.
Port Houston publishes truck turn times every week. In the report covering the week of October 19, 2026, Barbours Cut averaged 43 minutes and Bayport 44. A one hour truck turn at the warehouse is a reasonable goal against that benchmark.
When a truck waits several hours instead, the cost does not stay in one place. Capacity tightens across the fleet, drivers burn available drive time sitting still, chassis charges accrue, and an unload finishing too late to terminate the container back at the port adds an extra yard trip and another day. How far out a warehouse is booked, and whether it accepts cargo across its full operating window or only a narrow slot, shapes exposure more than anything at the terminal gate.
Does the Cargo Need to Stay in the Container?
The instinct is to move the container faster. In many cases the more effective move is to get the cargo out of it altogether.
Houston transloading services cover the case where a container cannot be delivered inside the free-time window, or where the destination does not require marine equipment. The container comes to the warehouse, the cargo transfers into a domestic trailer, and the ocean container goes back to the terminal. The clock stops. Draying a van one way can cost less than moving an ocean container roundtrip, since the container was built for international transportation rather than final-mile distribution.
The savings compound on the equipment side. A planned one-way domestic move cuts deadhead miles, lowering diesel consumption and fuel surcharge exposure. For companies carrying sustainability commitments, that is transportation efficiency doing double duty rather than a separate environmental program.
Street turns are the other option worth asking about. Matching an import container directly to an export booking switches the box from import to export without a terminal trip in between, stopping the per diem clock immediately and removing two moves from the plan.
Connect the Chain and Keep a Plan B
Express Pass, now a mandatory appointment for truckers accessing the container terminals, lets trucking companies initiate transactions before arriving at the gate. Technology alone does not solve it. What works is connecting the whole chain, from steamship line to port to drayage provider to warehouse to transload to final delivery.
The backup plan has to exist before the container arrives. If the warehouse cannot receive it on the planned day, the alternatives are another day inside the window, another warehouse, a transload, or a domestic van. Shippers weighing free time exposure on a lane can request a freight rate before the next container lands.
Excargo Services
4300 Malone Dr Ste 100,
Pasadena, TX 77507, United States
Pasadena
Texas
77507
United States
