Compare trucking terms
Fuel Surcharge vs Accessorial Charge
The practical difference
Fuel surcharge and accessorial charge both appear as line items on a freight invoice beyond the base linehaul, but they work differently and serve different purposes. A fuel surcharge is a per-mile adjustment that tracks diesel prices — it rises when fuel is expensive and falls when it is not. Most broker fuel surcharges are calculated from a fuel surcharge table that ties a per-mile add-on to a weekly diesel price index. An accessorial charge is a fee for a specific service beyond basic transportation: detention, driver assist, extra stops, liftgate, inside delivery, or TONU. Fuel surcharge is predictable and mileage-based; accessorials are event-based and require documentation to collect. A carrier can estimate the fuel surcharge in advance; accessorials are generally billed after the load based on what actually happened at the facility.
The cleanest way to separate the terms is to attach each one to a specific document, party, cost, mile type, or piece of equipment.
| Question | Fuel Surcharge | Accessorial Charge |
|---|---|---|
| What it covers | A mileage-based adjustment for diesel price changes — applied to compensate the carrier for fuel cost fluctuations. | A fee for a specific service or event beyond basic transport — detention, driver assist, extra stop, TONU. |
| How it is calculated | Per mile, based on a fuel price index table — predictable and known before the load is accepted. | Based on the event that occurred — hours waited, work performed, or service rendered after delivery. |
| Collection requirements | Verifiable against the broker's published FSC table — no special documentation typically needed. | Requires proof of the triggering event: timestamps, BOL signatures, broker notification records. |
When each one matters
- Use fuel surcharge when discussing the mileage-based add-on that compensates the carrier for diesel price fluctuations — it is calculated per mile and moves with a fuel price index.
- Use accessorial charge when discussing a fee for a specific service performed beyond basic transport — detention, driver assist, extra stop, or TONU.
- The distinction matters for invoice review and dispute: fuel surcharge is predictable and verifiable against a published index; accessorials require documentation of the specific event that triggered the charge.
What to check before acting on it
Start with the record that raised the question, then name which term controls that decision.
- Check which exact document, role, charge, mileage basis, or equipment requirement uses Fuel Surcharge.
- Check which separate decision depends on Accessorial Charge.
- Write the final answer in plain language so dispatch, billing, and the driver are not using one term for two different things.
Example in trucking
A rate confirmation for a 650-mile refrigerated load shows: linehaul $2,300, fuel surcharge $110 (based on the broker's FSC schedule at $0.17/mile for the loaded miles), and accessorial policy: detention $50/hr after 2 hours. The fuel surcharge of $110 was predictable — the carrier knew it before accepting the load based on the published FSC table. When the driver arrives at the delivery and waits 3.5 hours for the receiver to finish with another truck, a detention accessorial of $75 (1.5 billable hours at $50) is added to the invoice. The fuel surcharge was baked into the rate; the detention accessorial required a timestamp record and notification to the broker to collect.
How people confuse them
- Explaining Accessorial Charge when the driver or back office needed a decision about Fuel Surcharge.
- Treating a comparison page as a substitute for the contract, policy, rule, or load document.
- Failing to note who requested the item and when it was approved.
Quick questions
What is the main difference between Fuel Surcharge and Accessorial Charge?
A fuel surcharge adjusts the linehaul rate to account for diesel price changes — it is a blanket cost offset applied to the mileage; an accessorial charge is a separate fee for a specific service beyond the basic move.
When should a trucking office check Fuel Surcharge vs Accessorial Charge?
Use fuel surcharge when discussing the mileage-based add-on that compensates the carrier for diesel price fluctuations — it is calculated per mile and moves with a fuel price index. Use accessorial charge when discussing a fee for a specific service performed beyond basic transport — detention, driver assist, extra stop, or TONU. The distinction matters for invoice review and dispute: fuel surcharge is predictable and verifiable against a published index; accessorials require documentation of the specific event that triggered the charge.
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Last updated: 2026-05-10