Fuel is the swing cost
Running a truck has fixed costs (equipment, insurance, licensing) and variable costs (fuel, maintenance, driver pay). Of those, diesel is both one of the largest and by far the most volatile — it can move double digits in cents per gallon week to week. That volatility is exactly why fuel is handled as a separate, adjustable surcharge rather than folded into the base rate.
How a diesel move flows into a rate
When diesel rises, the cost of covering the same miles rises, and the fuel surcharge rises with it so the carrier is not running underwater. When diesel falls, the surcharge falls and the shipper sees the saving. The base linehaul rate — the part that reflects the lane, equipment, and market — stays comparatively stable, so both sides are insulated from fuel whiplash. See exactly how a fuel surcharge works.
Why transparency matters
A rate that quietly absorbs fuel into a vague "market rate" hides whether you're being charged fairly when diesel drops. QuickShip shows the fuel component openly, anchored to the public EIA price, so you can see why a number moved — and keep the decision. That's the honest-pricing idea behind every QuickShip rate estimate.