Rate per mile is the number everyone in trucking talks about. Cost per mile is the number that decides whether you survive. If you do not know your true trucking cost per mile, you cannot tell a profitable load from a loss. This guide shows you how to calculate it, which costs to include, and how to use it when you negotiate.
What Is Cost Per Mile in Trucking?
Cost per mile (CPM) is your total operating cost divided by the total miles you drive in the same period. It includes every dollar it takes to keep the truck legal, insured, fueled, maintained, and driven, plus a paycheck for you. Your revenue per mile must beat your CPM for you to earn a profit.
For context, the American Transportation Research Institute (ATRI) publishes an annual study of industry operating costs. Recent editions have put the average all-in cost per mile for carriers somewhere in the low-to-mid $2 range, but averages hide huge variation by fleet type, region, and lane. Check the latest ATRI report for current benchmarks, and use your own numbers for decisions.
The Basic Formula
Cost per mile = (fixed costs + variable costs) ÷ total miles
Use the same time period for both sides, usually a month or a year. Include deadhead miles (empty miles), not just loaded miles. Otherwise you will understate your real cost.
Step 1: Add Up Your Fixed Costs
Fixed costs do not change much with how many miles you drive. They are the bills that arrive whether the wheels turn or not.
- Truck and trailer payments, or lease payments.
- Insurance premiums (liability, cargo, physical damage, occupational accident where applicable).
- Permits, licenses, and registration fees.
- UCR, IFTA and IRP administrative costs, and the heavy vehicle use tax where applicable.
- Accounting, software, and communications.
- Load board and ELD subscriptions.
- Parking and storage.
- Your owner’s draw or driver salary if you are not counting it as a variable cost.
Step 2: Add Up Your Variable Costs
Variable costs rise and fall with mileage.
- Fuel: usually the largest variable cost. Divide your miles by your average miles per gallon and multiply by your average price per gallon.
- Maintenance and repairs: oil changes, brakes, belts, and so on.
- Tires: a major and often underestimated line item.
- Tolls and scales.
- Driver pay for employee drivers, per mile or per hour.
- Factoring fees if you use them. See how factoring works.
- Detention, lumper and accessorial costs you absorb. Some of these are recoverable, and our guides to lumper fees and TONU explain how.
Step 3: Count Your Total Miles
Use all miles, loaded and empty. Your ELD, fuel card reports, or trip sheets can provide the numbers. If your deadhead is 15 percent of total miles, that is 15 percent of your driving that earns nothing, but it still costs fuel and wear.
A Worked Example
Suppose, for illustration only, that in one month an owner-operator has:
- Fixed costs of $6,500 (truck payment, insurance, permits, software, and so on).
- Variable costs of $9,500 (fuel, maintenance, tires, tolls, and fees).
- Total miles driven of 9,000, including deadhead.
Total cost is $16,000, so cost per mile is $16,000 ÷ 9,000 = about $1.78 per mile. These are made-up numbers to show the math. Your figures will differ.
If this trucker takes a load that pays $2.00 per loaded mile but requires 100 empty miles to get there and 100 empty miles to get back to the next freight, the real revenue per total mile can drop below break-even. That is why you must compare rate against total miles, not just loaded miles.
Fixed vs. Variable: Why You Need Both Numbers
Knowing your variable cost per mile tells you the minimum you must earn to cover the cost of moving the truck one more mile. Knowing your total cost per mile tells you the rate you need to stay in business. In a very slow market, a carrier might temporarily accept a load that covers variable costs and part of fixed costs rather than sit idle. That is a short-term survival tactic, not a business plan.
How to Add Profit to Your Number
Break-even is not the goal. Decide on a target profit margin, for example a percentage of revenue or a dollar amount per mile, and add it to your cost per mile to set your minimum acceptable rate. Then use that number when brokers ask you to “take it or leave it.”
How to Lower Your Cost Per Mile
- Cut deadhead. Plan backhauls and use a good load board strategically.
- Improve fuel efficiency. Reduce idling, manage speed, and maintain tire pressure.
- Negotiate insurance and shop annually. A clean safety record helps.
- Prevent breakdowns. Preventive maintenance is cheaper than roadside repairs and missed deliveries.
- Charge for time. Recover detention and accessorial charges in your rate confirmations.
- Use software. Even simple tools to track expenses per load show you which customers and lanes really make money. See what to look for in TMS software for small carriers.
Frequently Asked Questions
Should I include my own pay in cost per mile?
Yes. If you do not, you are treating your labor as free. Include a realistic salary or owner’s draw so you see the true cost of operating.
How often should I recalculate?
At least quarterly, and whenever fuel prices, insurance premiums, or equipment costs change significantly.
What is a good cost per mile?
It depends on your equipment, lanes, and driver pay model. The only number that matters is whether your rate per mile, measured on all miles, exceeds your own cost with a margin.
Bottom Line
Know your number, update it regularly, and use it to say no. Many small carriers fail not because there is no freight, but because they accept freight priced below their real costs.
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