How to Calculate Your Truck's Cost Per Mile (Step by Step)

19 October 2026  ·  8 min read

Every owner-operator has heard it: know your numbers. The number that matters most is your cost per mile, because it decides which loads make you money and which ones only keep the wheels turning. Yet many drivers book loads off a rate that "feels right" without ever doing the math.

This guide walks through how to calculate your truck's cost per mile step by step, how deadhead and fees change it, and how to turn it into a break-even rate you can use on every broker call. If you would rather skip the arithmetic, the free Truck Cost Per Mile Calculator does all of it for you.

What cost per mile actually means

Cost per mile (CPM) is the total cost of running your truck for a period, divided by the miles you drove in that period. If it cost $19,000 to run your truck last month and you drove 10,000 miles, your cost per mile is $1.90.

Simple in theory. The hard part is making sure every cost is in the total, because the ones people forget are exactly the ones that turn a profitable month into a losing one.

Step 1: Add up your fixed costs

Fixed costs are the bills you pay whether the truck moves or sits in the yard. For most owner-operators they include:

• Truck payment or lease
• Trailer payment or rental
• Insurance (liability, cargo, physical damage)
• Permits, IRP plates and registration, spread over the year
• ELD subscription, phone, load board and software
• Parking, accounting and any other monthly subscriptions

Add them up for one month, then divide by the miles you ran that month. That is your fixed cost per mile. Notice what happens when miles drop: the same fixed bills get spread over fewer miles, so your cost per mile goes up. A slow week is expensive even when you are not driving.

Step 2: Work out your variable costs per mile

Variable costs rise with every mile you drive:

• Fuel: divide the price per gallon by your miles per gallon. At $3.90 a gallon and 6.5 MPG, fuel costs $0.60 a mile.
• Maintenance and tires: oil changes, brakes, tires and the repairs that eventually come. Setting aside a fixed amount per mile, often somewhere around 15 to 25 cents for a semi, keeps big repair bills from wiping out a month.
• Your pay: a per-mile wage for the driver, even when the driver is you.
• Tolls, scales and lumpers that are not reimbursed.

Add these together for your variable cost per mile.

Step 3: Total cost per mile

Your total cost per mile is simply fixed cost per mile plus variable cost per mile. Here is a worked example for a dry van running 10,000 miles a month:

Step 4: Adjust for deadhead

Brokers only pay for loaded miles, but your truck burns money on every mile, including the empty drive to the next pickup. That means your costs have to be recovered from loaded miles alone.

To find your cost per loaded mile, divide total cost per mile by the share of miles that are loaded. In our example, with 12% deadhead, 88% of miles are loaded:

$1.90 / 0.88 = $2.15 per loaded mile.

That 25 cent jump is why deadhead deserves its own attention. We cover how to cut it in Deadhead Miles: What They Really Cost You.

Step 5: Add dispatch and factoring fees to get your break-even rate

Dispatch and factoring fees are charged as a percentage of the load pay, so they cannot simply be added per mile. Instead, divide by what you keep after fees. With a 5% dispatch fee and a 3% factoring fee, you keep 92% of every dollar:

$2.15 / 0.92 = $2.34 per loaded mile.

That is your break-even rate: the lowest rate per loaded mile that covers every cost, your own pay and your fees. Below it, every load loses money. If you factor, our guide to freight factoring for owner-operators explains what that fee covers.

Step 6: Turn break-even into a target rate

Break-even keeps the business alive but does not grow it. Decide on a profit goal, either as a percentage or a dollar amount a month, and work out the rate that gets you there. In the example, earning an extra $3,000 a month on top of the driver's pay takes about $2.71 per loaded mile.

Now you have three numbers for every broker call: the rate you walk away from, the rate you aim for, and the rate that makes the month worth it.

Common mistakes that hide your real cost per mile

• Leaving out your own pay. The most common one, and the most expensive.
• Using a good month as the average. Use several months so slow weeks and big repairs are included.
• Forgetting yearly bills. Plates, permits and insurance down payments need to be spread across the year.
• Ignoring deadhead. Cost per mile without it always looks better than reality.
• Not updating it. Fuel alone can move your cost per mile by 10 to 20 cents.

Frequently asked questions

What is a good cost per mile for an owner-operator?

There is no single good number. It depends on your equipment, your truck payment, insurance and the miles you run. What matters is knowing your own number and never booking below the break-even rate it produces.

Should my own pay be included in cost per mile?

Yes. If your pay is left out, a load can look profitable while you are effectively driving for free. Include a per-mile wage for yourself, then treat anything above it as business profit.

What is the difference between cost per mile and cost per loaded mile?

Cost per mile spreads your costs over every mile the truck drives. Cost per loaded mile spreads the same costs over only the miles you are paid for, which is why it is always higher once you have any deadhead.

How often should I recalculate my cost per mile?

Every month, and any time a big cost changes, such as fuel prices, insurance renewal, a new truck payment or a major repair.