The invoice says two hours of detention and the receiver is certain the truck was only there for forty-five minutes. Both parties are partly right, and the disagreement almost always comes down to when the clock started.

Detention at the consignee’s dock is the accessorial that generates the most friction in drayage, partly because it is genuinely expensive and partly because it is the one charge the cargo owner has real control over. It is worth understanding precisely.

What detention is, and what it is not

In drayage, the word “detention” gets used for two different things and the confusion is costly.

Driver detention is the charge for the driver and truck waiting at a facility beyond an agreed free window – usually one or two hours. It is the trucking company’s charge and it compensates for a tractor and driver that cannot be earning elsewhere.

Container detention, sometimes called per diem, is the ocean carrier’s charge for keeping their container outside the terminal beyond the allowed free days. Different party, different clock, different invoice.

Our full breakdown of demurrage, detention and per diem separates these properly. This article is about the first one: the driver sitting at your gate.

When the clock starts

This is the fight. Most carrier tariffs start free time at arrival at the facility – meaning when the driver reports in, not when the driver backs into a door. Some receivers believe the clock should start at the dock assignment. Some contracts specify check-in at the guard shack.

Whatever your carrier’s tariff says, the defensible version is documented arrival. That means a timestamped gate-in or geofence event, not a driver’s handwritten note. If your carrier cannot show you an automatic arrival timestamp, ask for it before you dispute a charge – and if you are selecting a carrier, treat arrival documentation as a real evaluation criterion.

What actually causes the wait

No appointment, or an appointment that means nothing

A facility that accepts containers first-come-first-served during a four-hour window is guaranteeing queues. The truck arrives inside the window, so it is not late, and it waits behind five others. Every one of those trucks bills detention.

Doors are full of outbound

Many warehouses prioritize outbound shipping in the morning and receive in the afternoon, but schedule inbound containers all day. The doors physically are not available when the container arrives.

Floor-loaded containers with no labor assigned

A 40-foot container hand-stacked floor to ceiling takes hours to strip, and it takes people. If the receiving team did not know a floor-loaded box was coming, they staffed for palletized freight and the unload crawls.

Paperwork holds

The delivery order does not match the purchase order, a lot number is wrong, or the receiving system will not accept the container without a reference that nobody sent. The truck sits while two offices email each other.

Damage or discrepancy discovered at the door

Legitimate, and it does take time – but it takes less time when the receiving team knows in advance how to document and proceed rather than escalating from scratch.

The fixes, in order of payoff

1. Switch from live unload to drop and hook

The single largest lever. If the container can be dropped on a chassis at your yard and stripped on your schedule, driver detention goes to zero. You trade it for chassis and per diem exposure, which is usually cheaper and always more predictable. Our comparison of drop and hook vs. live unload works through when each makes sense.

2. Give real appointments, in 60-minute slots

Not “Tuesday.” Not “morning.” A slot with a door number attached. Facilities that do this see detention nearly disappear, because the constraint becomes visible and gets managed.

3. Tell the carrier how the container is loaded

Floor-loaded, palletized, or mixed changes the labor plan. This information exists on the packing list and almost never reaches the receiving supervisor before the truck does.

4. Pre-clear the paperwork

Send the delivery order, container number, seal number and PO reference to receiving the day before. Ninety percent of paperwork holds are resolvable in advance.

5. Use a pre-pull and a staging yard during peaks

If the terminal free time is expiring but your dock is full, pulling the container to a nearby yard buys you scheduling room without demurrage. That is what yard storage near the port is for – it decouples the terminal clock from your receiving clock.

How to handle a detention charge you think is wrong

Do not just refuse to pay it. Build a short file:

• The carrier’s arrival timestamp and departure timestamp.
• Your gate log or camera record for the same window.
• The appointment confirmation, with the slot time.
• Any documented cause of the delay that was outside the receiver’s control.

Then send it as a single message with the container number in the subject. Carriers reverse charges regularly when the record contradicts the invoice. They reverse almost nothing in response to a phone call with no documents.

Why carriers cannot simply absorb it

It is worth saying plainly: a drayage tractor has a limited number of productive turns in a day, and the economics assume the truck keeps moving. A three-hour wait does not cost the carrier three hours – it costs a second turn, and often an appointment at the terminal the next morning. Detention exists because the alternative is either pricing every move as if it will be delayed, or declining the business.

The healthiest version of this relationship is one where detention is rare enough that neither side thinks about it much. That is achievable, and it is mostly a scheduling problem. If you want help mapping where your current delays are coming from, start with a drayage quote and a conversation about your receiving pattern.

Frequently asked questions

How much free time does a drayage driver normally get at a receiving facility?

One to two hours is typical, defined in the carrier’s tariff or your contract. Anything beyond that is billed in increments. Confirm the exact free window and increment in writing before your first shipment rather than after the first invoice.

Does detention apply if the delay was the terminal’s fault, not mine?

Detention at your facility covers time at your facility. Delays at the terminal are separate and are usually addressed through other accessorials such as a dry run or a waiting-at-terminal charge. If a single invoice blends the two, ask for them itemized by location.

Is drop and hook always cheaper than paying detention?

Not always. Drop and hook shifts cost into chassis rental and container per diem, so it is cheaper when your unload is slow or unpredictable and more expensive when you can reliably strip a container in under an hour. Compare your average actual unload time against the free window to decide.