Most owner-operators can't tell you their cost per mile — and that's exactly why some struggle. It's the number that tells you if a load pays and if your business works. Here's how to find yours.
Why cost per mile matters more than anything
Cost per mile is the yardstick for every load decision you make. Without it, you're guessing whether a rate is good based on gut feel — and gut feel is how drivers stay busy without staying profitable. With it, you know exactly what a load needs to pay before you accept it. It's the difference between running a lot of miles and running miles that actually make you money.
The two kinds of costs
Your true cost per mile needs both fixed and variable costs — leaving either out gives you a number that's wrong.
- •Fixed costs. Stay roughly the same no matter how many miles you drive — truck payment, insurance, permits, ELD subscription.
- •Variable costs. Rise and fall with your miles — fuel, maintenance, tires, tolls, scales.
How to calculate your cost per mile
- •1. Total your fixed costs for the period. Truck payment, insurance, permits, ELD — everything that doesn't change with miles driven.
- •2. Total your variable costs for the same period. Fuel, maintenance, tires, tolls, scales — everything that does.
- •3. Add them together. Fixed costs + variable costs = your total operating costs for the period.
- •4. Total your miles for the same period. Include every mile, loaded and deadhead (empty) — you paid for both.
- •5. Divide total costs by total miles. That result is your cost per mile.
A simple example: say your fixed costs for the month are $3,000 (truck payment, insurance, permits) and your variable costs are $2,400 (fuel, maintenance, tires, tolls) — $5,400 in total costs. If you drove 3,000 miles that month, your cost per mile is $5,400 ÷ 3,000 = $1.80 per mile. Any load paying less than that is losing you money once you factor in what it actually costs to run.
Your breakeven rate — and using it to pick loads
Your cost per mile is your breakeven rate — the minimum you need to earn per mile just to cover your costs. When you're offered a load, compare its rate per mile against that number, accounting for any deadhead miles to reposition for it. A rate comfortably above your breakeven is profit; a rate below it is a load that's costing you money to run, no matter how full your schedule looks. Knowing your number is what lets you say no to cheap freight with confidence instead of guessing.
How TruxSheet helps
TruxSheet tracks your expenses and miles as you log them, then calculates your cost per mile and shows whether a load beats your breakeven — based on your actual logged costs and miles for the period, not a guess. You always know your number, and whether a lane is worth running.
Frequently asked questions
What is cost per mile for an owner-operator?
Cost per mile is your total operating costs divided by the total miles you drive over a period. It tells you what it actually costs to run your truck one mile — the foundation for knowing whether a load pays and whether your business is profitable.
How do I calculate cost per mile?
Add up all your costs for a period (fixed costs like truck payment and insurance, plus variable costs like fuel, maintenance, and tolls), then divide by the total miles you drove in that period. Total costs ÷ total miles = cost per mile.
What's the difference between fixed and variable costs?
Fixed costs stay roughly the same no matter how much you drive — truck payment, insurance, permits. Variable costs rise with miles — fuel, tires, maintenance, tolls. You need both to get your true cost per mile.
What is my breakeven rate?
Your breakeven rate is the per-mile rate you must earn just to cover your costs — it's essentially your cost per mile. If a load pays less than that per mile, you're losing money on it. Anything above it is profit.
How do I know if a load is worth taking?
Compare the load's rate per mile against your cost per mile. If the load's rate comfortably beats your cost per mile after accounting for deadhead (empty) miles, it's profitable. Knowing your number lets you say no to cheap freight with confidence.
What's a typical cost per mile for owner-operators?
It varies widely by operation, but many owner-operators land somewhere in the range of roughly $1.50 to $2.00+ per mile once all costs are counted. The important number isn't the average — it's YOUR number, based on your actual costs and miles.