Fuel Surcharge
A variable fee added to freight or service rates that adjusts with fuel price indexes, allowing carriers to recover fluctuating fuel costs without renegotiating base contracts, typically calculated as a percentage of the base rate tied to the DOE weekly retail diesel price.
Category: Fleet ManagementOpen Fleet Management SoftwarePublished June 13, 2026Updated June 13, 2026
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Compare Fleet Management Software software →How Fuel Surcharge Tables Work
A fuel surcharge (FSC) table maps DOE (Department of Energy) weekly retail diesel prices to a percentage or per-mile charge added to the base freight rate. The DOE publishes diesel prices every Monday for the prior week. Most carriers use a base price (called the 'peg' or 'trigger') — commonly set at $1.20 or $1.25/gallon — below which no surcharge applies. As diesel rises above the peg in defined brackets (typically $0.06 increments), the surcharge steps up by a fixed percentage, often 0.5–1.0% per bracket.
Percentage vs. Per-Mile Fuel Surcharge Methods
There are two dominant FSC structures in practice. Percentage-of-base-rate FSC ties the surcharge to the value of the load — so a high-value shipment pays a higher FSC dollar amount even if it travels the same distance as a lower-value load. This benefits carriers on premium lanes but creates inconsistency for shippers managing costs. Per-mile FSC charges a flat dollar amount per mile regardless of load value, making it easier for both parties to forecast and audit. The American Trucking Associations (ATA) and many shipper associations advocate for per-mile tables as more transparent and directly correlated to actual fuel consumption.
Operational Example: FSC Impact on a Regional Contract
Scenario
A carrier has a contract with a retailer on a 420-mile round-trip lane at a base rate of $1,800 per load. The contract uses a percentage-of-base FSC pegged at $1.25/gallon. When diesel averages $4.25/gallon in Q1, the FSC table shows 37.5%. The carrier collects $1,800 + ($1,800 × 37.5%) = $1,800 + $675 = $2,475 per load. When diesel drops to $3.10/gallon in Q4, the FSC falls to 24.0%, and the total drops to $1,800 + $432 = $2,232. The carrier's actual fuel cost on 420 miles at 6.8 MPG is 61.8 gallons × diesel price — roughly $381 at $3.10 and $520 at $4.25. Understanding this gap helps carriers verify whether their FSC table actually covers their exposure.
Negotiating and Auditing Fuel Surcharge Terms
- Always specify which DOE index applies — national average, regional (e.g., Lower Atlantic, Midwest), or on-highway diesel — as regional prices can differ by $0.15–0.30/gallon from the national average
- Clarify which day's published price triggers the surcharge for that week's shipments — Monday publication vs. prior Friday's price creates ambiguity
- Audit FSC invoices quarterly against the actual DOE price tables — billing errors and misapplied brackets are common in high-volume carrier relationships
- Negotiate a mutual review clause: both parties can request a table renegotiation if diesel prices sustain a level outside the table's designed range for 60+ consecutive days
- Watch for FSC applied to accessorial charges (liftgate, detention) — this is a common carrier practice that shippers often dispute