What an accessorial charge actually is
An accessorial charge is any cost on a freight invoice that is not the base line-haul rate. The line-haul pays for the truck, the miles, and the driver's time on the road. Everything else — the truck sitting at your dock past the appointment, a lumper fee at the consignee, an extra tarp, a driver who helped load by hand — is an accessorial.
They are not hidden fees. They are real costs that carriers pass through, and most of them are legitimate. The problem is not that they exist. The problem is that they show up on a freight bill with no explanation attached, weeks after the load, and the shipper cannot tell whether they are real or invented. That is a documentation problem, and it is fixable.
The common ones you will see on a truckload invoice
Detention is the charge for a truck and driver held past the free time allowed at pickup or delivery. Layover is the overnight version, charged when the truck cannot complete its trip within a day and has to stop. Truck ordered but not used is what you get when a carrier tenders a truck, it shows up, and the freight is not ready to load or has been cancelled.
Lumper is a fee the consignee's facility charges to unload freight that is not touch-friendly — a live floor dock with no forklift, for example. The consignee's forklift operator typically collects it at delivery, and it arrives on your bill with no receipt.
Tarp or tarping covers the cost of covering a load that requires it, whether the carrier supplies the tarp or a third party does the work. Driver assist covers a driver getting off the truck to help load or unload beyond normal duties. There are also stop charges, layover at the customer's request, redelivery when a delivery attempt fails, and a long list of smaller line items.
Two terms get mixed up constantly, and they are worth separating. Detention and demurrage both mean "you kept something past the free time," but they apply to different assets in different places. Demurrage is what a port or rail terminal charges when a container sits inside the facility past its free days. Detention is what a carrier charges when the truck or the container is held past free time in your possession. Ocean freight moves in both worlds, so a shipper importing can genuinely see both on one shipment. For a domestic truckload out of a warehouse, you are looking at detention, not demurrage.
Why the free time is the whole negotiation
Every detention charge starts with a number of free hours, and that number lives in your rate confirmation, your contract, or your broker's default terms. Change how long the truck sits at your dock and you change what you pay. A dock that unloads on the first truck in the morning and a dock that lets trailers sit until the afternoon shift are two different costs for the same freight.
The single most useful thing a shipper can do is decide, in advance, what the free time should be and write it down. Then run the operation so the truck actually moves inside it. Free time is not a negotiation lever to squeeze out the last hour. It is a promise to the carrier that their truck will be released, and if you break it, the invoice will say so.
The federal record rules that back this up
These charges are not loose private arrangements. The regulatory framework around them is specific and checkable, and it is worth knowing before the next invoice dispute.
Under 49 CFR 371.3, a property broker must keep a record of each transaction, and that record has to show the consignor's name and address, the name, address, and registration number of the originating motor carrier, the bill of lading or freight bill number, the amount of compensation the broker received for the brokerage service and who paid it, a description of any non-brokerage service performed along with the compensation received and the payer, and the amount of any freight charges collected by the broker together with the date of payment to the carrier. Those records have to be kept for three years.
The same section states that each party to a brokered transaction has the right to review the record of the transaction. If you are trying to understand what a broker collected and what they paid the carrier, that is a right you can exercise, not a favor you have to ask nicely for.
That framework is why the documentation matters. A detention charge with no timestamps, no appointment record, and no driver or carrier reference is a line item nobody can defend. A detention charge backed by arrival time, the appointment window, and the carrier's record is a fact you can check.
Two related rules keep the parties honest about what they are. 49 CFR 371.2 defines the difference between brokerage and non-brokerage service: brokerage is arranging transportation or the physical movement of property, and non-brokerage service is everything else a broker does on behalf of a carrier, consignor, or consignee. 49 CFR 371.7 covers misrepresentation, and it is the reason a broker cannot present itself as a carrier or conduct brokerage service in any name other than the one its registration is issued under. When you are checking an invoice, knowing which party is billing which line is not a technicality.
How to set up the load so the invoice is clean
Most accessorial disputes trace back to something that was never written down or never communicated. Before the truck rolls, put these on the rate confirmation or in writing to the carrier:
- Free time at each end, in hours, and what happens past it.
- The appointment window, how it was booked, and who confirms it.
- Equipment and commodity specifics that determine whether a tarp or special securement is needed.
- Driver assist, whether it is expected, and what it costs if it is.
- Lumper policy, whether your facility charges it and whether it is reimbursed on the freight bill.
- Who receives the invoice, and to whom a disputed line should go.
Then hold up your end at the dock. When the driver arrives early, do not wave them in before the freight is ready and then let the trailer sit. When the appointment moves, say so. A carrier who gets a heads-up can reschedule; a carrier who gets surprised builds the detention into the invoice, correctly, and you pay for it.
How to challenge a charge you do not believe
You do not need to win an argument. You need the record.
Ask for the detail behind the specific line item: arrival time and departure time, the appointment window that was confirmed, and the carrier's documentation. Compare it to your own dock records and your copy of the rate confirmation. If the free time was never set in writing, that is worth raising on its own, because it changes who bears the cost.
If a lumper fee is on the bill, get the receipt. If a truck-ordered-not-used charge appears, ask whether the load was cancelled and when. If a detention charge appeared without any documented appointment, ask the broker to pull the transaction record under 49 CFR 371.3 and show you what supports it.
Most disputes resolve once both sides are looking at the same timestamps. The ones that do not resolve are the ones where the documentation never existed.
BKE's rule on accessorials
We put the accessorial terms on the rate confirmation before the load moves, not after it delivers. Free time at pickup and delivery, the appointment window, driver assist, lumper handling, and where a disputed line goes — all on the document. If a load is going to generate accessorial charges, both sides should know the rules before the driver closes his eyes on that paperwork.
We also keep the transaction record the way 49 CFR 371.3 requires, and we will show you what supports a charge when you ask. That goes for our own invoices and for the carrier invoices behind them.
Related reading
The rate confirmation guide covers the rest of the document these terms live on. The DOT, MC, and surety bond explainer covers the authority and surety background behind the carrier on your invoice, and the carrier vetting standard covers how a carrier is checked before it is ever tendering freight for you.
