Fuel Surcharge
What is Fuel Surcharge?
A fuel surcharge is a separate, temporary line on a quote or invoice that rises and falls with the price of fuel, letting a route business pass through part of a fuel spike without permanently repricing the work. A workable surcharge has three parts, all written down in advance: a published index it tracks, a trigger price above which it starts to apply, and a formula that converts each step above the trigger into a percentage of the job or a flat amount per stop. Because it is indexed, it recedes when fuel does — which is exactly what separates it from a price increase.
Fuel moves faster than contracts do. A route business burns fuel between every stop, so a spike hits work already sold at last season’s price. Repricing the whole book takes a letter and some churn; a surcharge disclosed up front takes effect on its own terms.
That disclosure is the whole game. Name the index — in the US the Energy Information Administration publishes weekly on-highway diesel and retail gasoline averages each Monday, nationally and by region; other countries publish their own. Name the trigger, the step size, and how often you recalculate. A surcharge invented after the fact reads as a hidden fee; one written into the agreement reads as arithmetic.
Three tools sit around this. The vehicle cost per mile calculator gives the number a surcharge should be sized against; the fuel surcharge calculator turns the trigger and step size into the per-stop add-on; and the trip charge covers the fixed cost of showing up. If fuel has moved far enough that a permanent increase is the honest answer, model it with the price increase impact calculator. The 2026 fuel move works the same EIA series through a lawn route.