Fuel Surcharge Calculator

A fuel surcharge is a separate charge carriers add to freight and parcel bills to pass through the cost of diesel above the level their base rates assume. It exists so carriers do not have to reprice every lane each time fuel moves: the base rate stays put and the surcharge floats with a published fuel index, most commonly the weekly DOE on-highway diesel average.

Two mechanisms cover almost every schedule. Percent of linehaul: the schedule names a peg price, a price step, and an escalator, and the surcharge percent rises by the escalator for every full step the diesel index sits above the peg. Cents per mile: the surcharge is the current price minus a base price, divided by an assumed truck MPG, then multiplied by the miles. LTL and parcel bill the first way, truckload usually the second.

Most schedules in the United States key to the DOE weekly retail on-highway diesel price, a national average published by the U.S. Energy Information Administration. Some contracts use one of the EIA's regional averages instead of the national number, which matters when your freight runs in a region that consistently prices above or below the average, so check which index your contract names.

On the EIA's gasoline and diesel fuel update page at eia.gov, which publishes the weekly retail on-highway diesel average. Carriers read their surcharge tables off that number, typically applying each week's price to shipments in the following week, though parcel carriers usually lag a week or two further behind. The surcharge on your invoice still traces to a specific published figure you can verify.

The peg is the diesel price at or below which the schedule charges its base percent, often zero. It represents the fuel cost the carrier says is already built into the base rate. Everything above the peg escalates. A low peg with a fine step means the surcharge starts earlier and climbs in small moves; that is why two carriers can quote the same base rate and bill very different totals.

The long-standing matrix assumes 6.0 miles per gallon, and many contracts still use it even though modern tractors commonly do better. The assumption matters: at the same fuel price, a 6.0 MPG schedule bills about 8 percent more per mile than a 6.5 MPG schedule. If your carrier's equipment runs efficient, the MPG assumption is a legitimate negotiating point.

Yes. Both carriers publish fuel surcharge percentages for ground services indexed to the EIA on-highway diesel average, and for air services indexed to a jet fuel price, adjusting weekly. The percentage applies to the base transportation charge and, at both carriers, to several accessorial charges as well, so the effective impact on a parcel invoice is larger than the headline percent applied to the base rate alone.

The week-to-week percent is not, because it follows the published index, but the schedule that turns the index into a percent is contract language: the peg, the step, the escalator, the choice of index, and whether the surcharge applies to accessorials are all negotiable terms. Shippers with volume also negotiate discounts stated against the published table, and caps that limit how high the percent can float.

It depends on the mode and the contract. Freight surcharges usually apply to the linehaul only. Parcel carriers apply fuel to many accessorials, residential delivery and delivery area surcharges among them, which compounds the cost of those fees. The service guide or your contract lists exactly which charges carry fuel; auditing an invoice against that list is one of the quickest checks a shipper can run.

A 3PL that arranges your freight or parcel shipping passes the carrier's fuel surcharge through, either as its own line or folded into the shipping rate. When you compare fulfillment quotes, ask whether quoted shipping rates include fuel and which schedule they float on. A quote that looks lower with fuel excluded can invoice higher once the surcharge lands.