By Luis Lopez, AI transportation consultant, CEO of Go Hub.io Holdings Corp and subsidiaries, and host of the Freight Guru Podcast
A truckload quote usually starts with one number: the linehaul rate to move the freight from origin to destination. The invoice that arrives afterward sometimes has more lines than the quote did. Those extra lines are accessorial charges, the payments for services and circumstances beyond the basic point-to-point move. Understanding them is one of the easiest ways for a shipper to make freight costs less surprising.
As an AI transportation consultant, I pay close attention to how freight data gets recorded, and accessorials are an area where records are often untidy. This guide explains the common ones conceptually, why they exist and how to manage them.
What an accessorial charge is
An accessorial is any charge added to the base rate because something extra was required or something did not go as planned. Linehaul, with fuel surcharge treated separately, pays for the truck, the driver and the miles. Anything that consumes additional driver time, requires special equipment or services, or changes the plan after booking tends to show up as an accessorial.
The rules are set by your agreement, rate confirmation or tariff, not by a universal standard. Terms, time allowances and rates vary between carriers and brokers, which is why the details of your own paperwork matter more than any general description.
Time-based charges
Detention
Detention compensates the carrier when a driver waits at a pickup or delivery location beyond an agreed amount of free time. A truck sitting at a dock is a truck not earning, and the driver is not moving freight or making progress on available hours. Most agreements specify a free period and then a charge for time beyond it. Disputes usually center on arrival and departure times, so accurate timestamps are crucial. For tactics on preventing it, read how to reduce truck detention time.
Layover
Layover applies when a driver has to wait overnight or for an extended period because the load was not ready, the receiver could not take the delivery or a rescheduled appointment pushed the truck into another day. It reflects the lost opportunity of the driver and equipment over a longer span than ordinary detention.
Driver-related waiting and hours
Drivers operate within federal hours-of-service limits, so waiting time can reduce the hours they have left to drive. That interaction is part of why delays at a facility can cascade into missed appointments.
Charges tied to the stops and handling
Stop-offs
A stop-off charge covers additional pickup or delivery locations on a single truckload. Each extra stop adds time, routing complexity and sometimes mileage. Agreeing on the stop sequence and locations upfront prevents arguments later, because a stop that was not in the original booking is a common source of disagreement.
Driver assist
When the driver helps load or unload, the carrier may charge for the labor and the added time. Many truckload moves are intended to be loaded and unloaded by the shipper and receiver, so a driver assist should be agreed beforehand and documented rather than arranged at the dock.
Lumper services
Some facilities require third-party unloading crews. The cost is generally passed along to whoever is responsible under the agreement. For the specifics, see What Is a Lumper Fee.
Tarping
On flatbed and some open-deck loads, freight needs protection from weather. Tarping requires equipment and effort, and carriers commonly price it separately from the base move. Whether tarps are needed should be settled at booking, along with any related securement requirements.
Charges tied to changes and cancellations
Truck order not used
A truck order not used, usually abbreviated TONU, applies when a carrier dispatches a truck and the load is canceled or becomes unavailable after the truck has committed to it. The carrier gave up other opportunities and incurred cost getting to the pickup. TONU terms differ, including when the cancellation is considered late. There is a separate full explanation in What Is a TONU in Trucking.
Reconsignment and diversion
Reconsignment means changing the destination or the receiving party while the shipment is already in transit. A diversion can mean redirecting the truck to a different place. Either one can alter the route, mileage and timing from what the carrier planned, so the carrier may price the change. Clear written instructions matter here, as does telling the carrier as early as possible.
Redelivery and failed delivery
When a receiver is closed, unprepared or refuses a delivery attempt, the truck may need to return another time. Additional trips and waiting generate costs that are usually billed to the party responsible.
Charges tied to the freight and the route
- Hazardous materials. Loads that require placarding and special handling or driver qualifications often carry an added charge.
- Temperature control. Refrigerated moves involve fuel for the unit and other requirements that affect pricing, usually reflected in the equipment type rate and any specific service terms.
- Team drivers and expedited service. Faster transit that needs two drivers or priority handling costs more.
- Appointment and access requirements. Restricted access sites, special check-in processes, or locations that need extra time can lead to additional charges depending on the agreement.
- Permits and escorts. Oversize or overweight moves may need permits or escort vehicles, with related costs.
How shippers can keep accessorials predictable
Read the paperwork before the truck arrives
The rate confirmation or contract is where the accessorial rules live. Check the free time allowance, the charges listed and the process for approving additional costs. If something is missing, ask before dispatch.
Give complete information at booking
Many accessorials arise from details that were unknown or omitted: a second stop, a facility with restricted hours, a need for tarps, a dock that requires an appointment. A thorough booking request is the cheapest way to avoid them.
Keep good time records
Gate logs, check-in times and signed receipts are your evidence when a time-based charge is questioned. Carriers rely on them too. Accurate records make disputes shorter and fairer for both sides.
Approve changes in writing
If a stop is added or a destination changes, confirm the new charge in writing before the move continues. Informal verbal agreements are hard to reconstruct weeks later.
Review invoices against the agreement
Check each accessorial line against what was authorized. Unexpected lines are worth a question, and legitimate ones are worth understanding so they can be avoided on the next shipment. The process behind this is described in Freight Audit and Payment Explained.
Accessorials are information, not just cost
If the same shipper pays detention at the same facility repeatedly, that is a scheduling or dock-capacity problem, not a billing problem. If reconsignments happen often, the planning process upstream deserves attention. Tracking accessorials by type, lane and facility tells you where the operation is leaking money and where carriers may view your freight as hard to haul. Shippers who cut avoidable accessorials tend to become easier customers to serve, which supports better service over time.
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About the author: Luis Lopez is a Miami-based AI transportation consultant and logistics entrepreneur, the CEO of Go Hub.io Holdings Corp and subsidiaries, and host of the Freight Guru Podcast.
