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Typical owner-operator: 8,000–12,000 mi/month
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Your rate must exceed your CPM to profit.
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How to Calculate Your Trucking Cost Per Mile
Cost per mile (CPM) is the single most important number an owner-operator or small fleet can know. It is the total cost of running your truck divided by the miles you drive. If you don't know your CPM, you can't know whether a load pays — a $2.10/mile load looks great until you realize your truck costs $1.95/mile to run before you've paid yourself a dime. Your CPM is your floor: any rate below it loses money on every mile.
Fixed costs vs. variable costs
Trucking costs split into two buckets, and the calculator above keeps them separate on purpose because they behave very differently as your mileage changes.
- Fixed costs are the bills you pay every month no matter how far you drive: truck and trailer payments, insurance, the Heavy Highway Vehicle Use Tax (HVUT), health insurance, permits, and office or software costs. The more miles you run, the lower your fixed cost per mile becomes — this is why empty weeks are so expensive.
- Variable costs scale directly with miles driven: fuel, tires, and maintenance set-asides. These stay roughly constant on a per-mile basis whether you run 5,000 or 12,000 miles in a month.
The CPM formula
CPM = (Total Fixed Costs ÷ Monthly Miles) + Variable Cost per Mile
Fuel cost per mile is itself a small calculation: divide your fuel price per gallon by your average MPG. At $4.50/gallon and 6.5 MPG, that's about $0.69 per mile in fuel alone — usually the single largest line on the sheet.
Worked example
A typical owner-operator running 10,000 miles a month:
- Fixed costs: $2,400 truck/trailer + $1,200 insurance + $600 health + $300 office = $4,500/month
- Fuel: $4.50/gal ÷ 6.5 MPG = $0.69/mi
- Maintenance set-aside: $0.15/mi · Tires: $0.05/mi
Variable per mile: $0.69 + $0.15 + $0.05 = $0.89/mi
Break-even CPM: $0.45 + $0.89 = $1.34/mile
At $1.34/mile break-even, this driver needs every load to clear that rate just to cover the truck — and well above it to pay a salary, set aside taxes, and build a cushion. Most owner-operators target a margin of $0.50–$1.00/mile over their CPM.
What's a typical trucking CPM in 2026?
Industry surveys put the average owner-operator's all-in cost between $1.80 and $2.20 per mile once you include an owner's salary, taxes, and downtime — higher than the bare-truck figure above. Fuel is roughly 25–35% of total cost, fixed overhead 25–35%, and maintenance, tires, tolls, and everything else make up the rest. Your number will be higher if you finance new equipment or run fewer miles, and lower if your truck is paid off and you run steady volume.
How to lower your cost per mile
- Drive more miles. Because fixed costs are spread across your mileage, cutting deadhead and avoiding empty weeks is the fastest way to drop CPM. Going from 8,000 to 11,000 miles can shave $0.15+/mile off fixed cost alone.
- Improve fuel economy. A single MPG improvement at $4.50/gal saves roughly $0.10/mile. Manage idle time, tire pressure, and speed — and watch your fuel surcharge to make sure it's keeping pace with diesel.
- Book better-paying freight. Lowering CPM only helps if your rates clear it. Dedicated cross-border lanes and direct shipper relationships typically pay more per mile than spot load boards.
Frequently Asked Questions
What is a good cost per mile for trucking?
There's no universal "good" number — a lower CPM is always better, but it depends on your equipment and miles. As a benchmark, many owner-operators run an all-in cost of $1.80–$2.20 per mile in 2026 once an owner's salary and taxes are included. The goal isn't a specific CPM; it's making sure every load you book pays comfortably above whatever your CPM actually is.
Should I include my own salary in cost per mile?
Most carriers calculate a bare-truck CPM (what it costs to operate the equipment) and then add a target driver pay and profit margin on top. The calculator above gives you the bare-truck break-even number. Whatever salary you want to earn should be added as a margin requirement above that break-even, not buried inside it — that keeps your true floor rate visible.
How do fixed costs affect my cost per mile?
Fixed costs (truck payment, insurance, permits) stay the same each month regardless of miles, so the more you drive, the lower they become on a per-mile basis. A $4,500 monthly overhead is $0.56/mile at 8,000 miles but only $0.41/mile at 11,000 miles. This is why minimizing empty miles and downtime is the most powerful lever you have over your CPM.
How do I calculate fuel cost per mile?
Divide your fuel price per gallon by your average MPG. At $4.50 per gallon and 6.5 MPG, that's $4.50 ÷ 6.5 = about $0.69 per mile. Fuel is usually the largest single variable cost, so even a small MPG improvement or a well-timed fuel surcharge has an outsized effect on your bottom line.
What's the difference between cost per mile and rate per mile?
Cost per mile is what it costs you to run the truck. Rate per mile is what a shipper or broker pays you for a load. You profit only when your rate per mile exceeds your cost per mile. The gap between the two is your margin — and knowing your CPM is the only way to tell, in real time, whether a load on the board is worth taking.
Related Tools
Results are estimates based on inputs provided. Actual operating costs vary by equipment, routes, and market conditions. Consult an accountant for financial planning.