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Avoid Trucking Accessorial Charges: Detention, TONU, and Layover

Resources > Avoid Trucking Accessorial Charges: Detention, TONU, and Layover
Truckload accessorial charges like detention, TONU, and layover can increase your freight bill and slow down your supply chain. Use our guide to learn about these fees and how to avoid them.
Published: March 27, 2026
Last Modified: March 31, 2026

A truckload accessorial charge is a supplementary fee on a shipper's freight bill when delays occur, schedules are changed, or additional services are needed. The most frequent accessorial charges are detention, “Truck Order Not Used” (TONU), and layover fees. This guide will explain each surcharge and how to prevent them to reduce your freight rates.

Key Takeaways:

  • Truckload accessorial charges are service fees added to a shipper’s freight bill to complete a shipment.
  • Common causes for accessorial charges are shippers missing appointments or not having the load ready for pickup; or carriers unable to book a driver’s next load in time.
  • Detention usually starts when loading or unloading exceeds the carrier's allowed free-time.
  • TONU applies when a shipper cancels after a carrier has accepted the load and assigned equipment or a driver.
  • Layover applies when a driver cannot move to the next scheduled load because of a delay that extends beyond the standard waiting period.

We’ll explain each accessorial charge to help you avoid them when you ship freight..

Defining Accessorial Charges

A trucking accessorial charge is an additional service fee carriers apply to shipments when operational delays or service changes increase the time, equipment use, or labor required to complete a shipment.

Detention, TONU, and layover are common fees shippers face due to scheduling issues or load readiness. We’ve created a chart that outlines the differences between each surcharge.

Infographic depicts the differences between accessorial charges like detention vs tonu vs layover

Now let’s take a closer look at each accessorial charge and what causes them.

Detention

Detention is a time-based accessorial charge. Carriers bill detention charges to shippers who exceed the allotted “free time” loading or unloading freight from containers. In truckload shipping, detention usually starts after the driver checks in and the free-time window expires. 

Free time is a grace period allowed by carriers for using their equipment without incurring extra fees. Free time can range from hours to days, but if shippers go over that time, carriers can charge up to $100 an hour for every hour containers are held.

TONU

TONU is a surcharge shippers pay when they cancel a shipment after the carrier accepts the tender and prepares transportation.

Shippers can cancel transportation for any reason, such as accidentally double-booking or their customer cancels the order. The TONU fee helps the carrier recover the time and capacity reserved for the original move.

Layover

Layover is a time-based surcharge when drivers are delayed from picking up or delivering their next load. A shipper or carrier can cause this delay. Layover typically starts when a driver has been waiting at least 24 hours.

The typical amount of a layover fee is between $20 and $80. However, you could pay up to $500 depending on the carrier. 

Shippers seeking to control freight cost can reduce accessorial charges by understanding their causes and using strategic planning practices across pickup, loading, and delivery.

We’ll go over common surcharge causes to help you navigate each.

Common Causes That Trigger Each Charge

Accessorial charges are headaches that can break trust between carriers and shippers. This can lead to problems like tender rejection. Let’s take a look at the usual triggers to avoid delays in your supply chain.

Appointment Misses and Dock Delays

Scheduling conflicts happen when shippers and carriers miscommunicate about the freight pickup time. This leads to detention from dock delays where a driver has arrived at the receiving location, but there isn’t a dock door available as it’s already in use.

Load Not Ready or Cancellation Timing

Load not read: Shippers who do not prepare or package loads correctly and on time for shipment trigger detention charges. Carriers can refuse to load freight that isn’t properly palletized or crated, causing shipping delays.

Late cancellation: TONU charges arise when shippers cancel the order after a driver and truck were matched with their shipment. Shippers can expect to pay up to $300 for a cancelled dry van shipment and $500 for oversized/over-length loads.

Typical Scenarios

Shippers or carriers can be responsible for triggering accessorial charges. We’ll look at two common scenarios for each one and discuss how the fees can be avoided.

Shipper is Responsible (TONU)

Here’s an example of a TONU fee:

A shipper has ordered a dry van truck for a full truckload (FTL) shipment of cosmetics to be picked up from Florida and driven to Texas.

The carrier has accepted this tender, assigned a driver to pick up the load, but the shipper calls to cancel the shipment because they accidentally selected the wrong truck. For cosmetics, they would need a reefer trailer to maintain temperature control to preserve the product.

The carrier would bill the shipper a TONU fee to recover expenses from the unused truck or even pay their driver if they were already en route to pickup.

Carrier is Responsible (Layover)

Here’s an example of a layover fee:

A carrier has assigned a driver to haul a less-than-truckload (LTL) shipment of onions to a local grocery store. The carrier completes the shipment late Friday afternoon and the driver now waits for the carrier to assign them their next load. 

However, the carrier says the next load won’t be until the next business day, which is Monday. Since the driver has to wait over 24 hours for their next load, the carrier will pay them their layover rate.

In the next session, we’ll discuss how to prevent accessorial charges with a few simple steps.

Prevention Checklist

Use our checklist to avoid accessorial charges and reduce your freight bill.

Accessorial Charges Prevention Checklist

Before you book your next shipment, follow these steps to ensure you don’t get stuck with a surcharge and maintain cost control.

  1. Confirm appointment details:
    • Verify the pickup date, time, and location
    • Record the arrival/check-in time of the driver
    • Record loading start and completion time
  2. Review shipping documents for accuracy:
  3. Review freight bill after delivery: Double-check charges and report any billing mistakes

Now let’s break down what to do if you’ve already been charged an accessorial fee.

Dispute and Validation Checklist

Did your carrier bill you for an inaccurate accessorial charge? Our checklist will help you dispute the charge with valid proof to provide to your carrier.

Accessorial Charges Dispute and Validation Checklist

Prepare yourself with proof to dispute billing errors in three steps:

  1. Audit your invoice: Compare invoice to agreed upon rate and verify correct calculation of accessorial charges.
  2. Review pickup/delivery details: Review your facility’s timestamps for load/unload to dispute detention fee.
  3. Provide shipping records: Send signed BoL and/or POD to carrier along with other supporting documentation to remove fee.

Result: By using this checklist, you’re able to successfully dispute accessorial charges with documented proof and improve carrier accountability.

Avoid Trucking Accessorial Charges With USA Truckload Shipping

What we do:

  1. Build a custom freight quote to match your shipping needs (mode and additional services like expedited shipping or white glove delivery).
  2. Confirm freight details (commodity, mode, pickup/dropoff location, and time sensitivity).
  3. Confirm shipping information (truck required, liftgate provided, pickup and delivery addresses, and location).
  4. Prepare and verify BoL, POD, and shipping documents prior to transportation.
  5. Communicate with you before, during, and after delivery to relay transit information and address questions/concerns.

Typical timeline: We prepare your truckload rate strategy and shipping papers the same day you book to confirm your lane.

What you’ll need: Freight information (including size, temperature-control, hazmat, or fragile details), origin, destination, and timeline.

Why choose us: USA Truckload Shipping is a 3PL with a vast carrier network that will match the best-fit carrier to your load for safe and on-time deliveries.

Outcome: We guarantee 99.5% on-time delivery to avoid disruptions in your supply chain. We communicate with you every step of the way. We can even calculate accessorial charges and reduce your freight bill.

At USA Truckload Shipping, we understand surcharges can throw a wrench in your supply chain with surprise fees. We partner with our freight experts in our 22,000+ carrier network to fit your business needs and complete your shipments without the extra steps or charges. Call us at (866) 353-7178 or reach out on our contact page

FAQ

What are truckload accessorial charges?

A truckload accessorial charge is a supplemental fee based on additional services or time-based penalties to complete a shipment.

Are shippers responsible for layover fees?

Shippers are responsible for layover fees if the shipper delays the driver from loading/unloading for over 24 hours. If the shipper’s receiving location was closed, loading docks were unavailable, or if staff wasn’t present, this can result in a shipper being at fault and paying a layover surcharge.

How can I dispute a truckload accessorial charge?

Shippers can dispute accessorial fees by presenting documentation that proves they were not at fault to receive a fee. Excessive or inaccurate surcharges should be disputed to maintain carrier accountability and trust between a shipper and carrier.

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