A fuel surcharge is a variable freight fee added to the base transport rate to pass changes in fuel cost through from the carrier to the shipper. It keeps logistics contracts priced against diesel, not against last year's assumption.
How a fuel surcharge is calculated
A wholesaler ships pallets under a carrier framework with diesel assumed at EUR 1.60 per litre. When the reference index (in Europe usually Platts; in the US the DOE diesel price) prints above that base, the surcharge grid steps the base line up and a EUR 900 shipment becomes EUR 972. The next week diesel falls back and the surcharge drops in line.
Fuel surcharges are structured as a step grid tied to the index: for every price band above the base, the surcharge rises by a fixed amount per shipment or per mile. Base, index source, cadence and true-up rules are the parameters carriers and shippers negotiate.
Where fuel surcharges appear in contracts
Fuel surcharges appear in transport agreements, distribution contracts, 3PL master service agreements and customer supply contracts where freight is not free on board. The clause sits alongside the rate card and defines the base assumption, the index, the cadence and any cap. Because the surcharge lands in freight cost, it flows through to contract economics and reshapes delivered contract value on every shipment. Reconciling invoiced surcharges against the published index catches overcharges before they compound.
Fuel surcharge FAQ
Is a fuel surcharge negotiable?
Yes. Base assumption, index, step size and cap are all commercial terms. Shippers with volume regularly negotiate a lower base or a shallower step grid.
Does a fuel surcharge apply when diesel falls?
It should. Well-drafted clauses are symmetrical: the surcharge drops or turns into a credit when the index prints below the base. Older one-way clauses only add cost when diesel rises.
Who audits fuel surcharges on freight invoices?
Either the shipper's freight-audit team or a third-party provider. Both compare the invoiced surcharge to the published index and claim back any delta.
