Fuel Surcharge Calculator
Compute a defensible, DOE-based fuel surcharge per mile and pass diesel price swings through to the shipper — instead of quietly absorbing them out of your own margin.
Fuel Surcharge Calculator: The Complete Guide
How the DOE-based fuel surcharge works, what the peg really means, and how to quote it without arguing.
1. The Fuel Surcharge Formula
One formula, three outputs — per mile, per load, and a floor rule that protects shippers when diesel drops:
Total Surcharge = Surcharge/mile × Loaded Miles
If Diesel ≤ Peg → Surcharge = $0
2. The Three Numbers That Decide Everything
- The diesel index. The DOE/EIA Weekly Retail On-Highway Diesel price, published every Tuesday — national or regional depending on your contract.
- The peg. The neutral price where no surcharge applies. History puts it at $1.20–$1.25, but it is negotiable: a lower peg pays you more at every pump price.
- The assumed MPG. Commonly 6.0, with real trucks running 6.0–7.5. Lower assumed MPG raises the per-mile surcharge.
3. Worked Example: $4.83 Diesel, 1,000-Mile Load
With diesel at $4.83, a $1.25 peg, and 6.0 MPG: ($4.83 − $1.25) ÷ 6.0 = $0.597 per mile. On a 1,000-mile load that is about $597 billed on top of the linehaul — money that keeps the fuel swing off your P&L instead of inside it.
4. Why the Surcharge Protects Both Sides
The fuel surcharge is a two-way shield. When diesel spikes, the carrier is made whole instead of quietly hauling at a loss. When diesel falls, the surcharge shrinks to zero — the shipper's base rate never carries a hidden fuel premium. That symmetry is the negotiating point: a transparent pass-through beats a fuel escalator clause either side has to fight.
5. Your Contract Beats Any Calculator
Fuel surcharge terms are negotiated, not statutory. The peg, MPG, index (national vs. regional), and payment timing in your contract override any standard formula. This tool applies the industry-standard DOE method so you can sanity-check invoices and quotes — but when the contract and the calculator disagree, the contract wins.
6. This Week's Diesel Snapshot
Source: EIA Gasoline and Diesel Fuel Update, updated weekly on Mondays.
7. Make Sure You're Getting Paid — The Full Toolkit
The surcharge is one line of a defensible rate. Set your floor with the trucking cost per mile calculator, build the quote with the rate per mile calculator, and keep your per-state fuel records audit-ready with the IFTA mileage tracker.
8. Frequently Asked Questions: Fuel Surcharge
The standard DOE-based formula is: (current diesel price − base peg price) ÷ assumed MPG = surcharge per mile. Multiply by loaded miles for the load total. If diesel falls to or below your peg, the surcharge is $0.
The peg is the neutral diesel price written into your contract — the price at which no surcharge applies. Historically it sits around $1.20–$1.25 per gallon, but it is a negotiated number: the lower your peg, the more surcharge you collect at any given pump price.
The industry standard is the DOE/EIA Weekly Retail On-Highway Diesel price, published every Tuesday. Contracts may specify the national average or a regional index — use exactly what your contract names.
Most trucking fuel surcharge agreements assume 6.0 MPG, with real-world heavy trucks typically running 6.0–7.5. Like the peg, the MPG in your contract is the one that counts — this calculator just applies the standard formula.
The shipper or broker pays it on top of the linehaul rate. It is not a penalty — it is a transparent pass-through that keeps the base rate stable while diesel moves, protecting both sides of the deal.
The surcharge is measured from the peg upward. A $1.20 peg means every pump price is measured against a lower starting line, so the (diesel − peg) gap — and your surcharge per mile — is larger at the same diesel price.