Cost per mile
Also called CPM
Cost per mile is your total operating cost divided by total miles driven, and it is the break-even figure every rate decision should be measured against.
Last reviewed · by the Fleetchart team
A complete cost per mile includes fixed costs that accrue whether the truck moves or not — truck payment, insurance, permits, software, accounting — and variable costs that scale with distance, chiefly fuel, maintenance, tires and tolls.
Two things push most calculations wrong. The first is forgetting irregular expenses: tires, major services and annual filings do not arrive monthly but they arrive. Amortizing them across the year keeps good months from looking better than they are. The second is leaving out owner compensation and self-employment tax, which makes the business look profitable while the owner is unpaid.
Once the figure is honest it changes how you work: you have a floor to negotiate from, and you can tell instantly whether a rate clears it.
Use the miles you actually ran, not the miles you hope to run. Fixed costs divided by fewer miles make a bigger number per mile, so a slow month raises your cost per mile even if you spent the same. That is why a truck sitting for a week costs you money even though it burns no fuel.
For a public yardstick, ATRI's annual cost survey put the 2025 industry-average cost to operate a truck at $2.336 per mile, or $1.854 per mile without fuel. That is an average across the carriers ATRI surveyed, not a target. Your own figure can sit well above or below it. But if yours is far lower, check that your own pay, tires and yearly bills are in it.
Cost per mile only means something next to rate per mile, measured over the same period and the same miles, deadhead included. The gap between the two is your margin per mile.
Worked example
One truck, one month
A truck runs 9,000 miles in the month. Fixed costs: $2,200 truck payment, $1,400 insurance, $200 permits, $150 software, $150 accounting and $5,000 owner pay. It gets 6.5 mpg with diesel at $3.80, and spends $0.10 a mile on maintenance, $0.03 on tires and $400 on tolls.
- Fixed costs: $2,200 + $1,400 + $200 + $150 + $150 + $5,000 = $9,100. Per mile: $9,100 ÷ 9,000 = $1.011.
- Fuel per mile: $3.80 ÷ 6.5 = $0.585.
- Tolls per mile: $400 ÷ 9,000 = $0.044.
- Variable per mile: $0.585 + $0.10 + $0.03 + $0.044 = $0.759.
- Cost per mile: $1.011 + $0.759 = $1.77.
This truck needs $1.77 for every mile it turns just to break even, owner pay included. At 7,000 miles instead of 9,000, the fixed part rises to $1.30 and the total to about $2.07.
Sources
- ATRI, An Analysis of the Operational Costs of Trucking: 2026 Update (July 2026) · 2025 industry-average operating cost of $2.336 per mile ($1.854 excluding fuel), and 2025 operating margins by sector. (checked )