Cost Per Mile Calculator for Trucking

Every owner-operator knows their rate per mile. Far fewer know their cost per mile, and that second number is the one that decides whether the business survives a slow quarter. A cost per mile calculator is not a nice-to-have. It is the difference between picking freight and guessing at freight.

This guide gives you the formula, the expenses that slip through the cracks, the current industry benchmark, and a worked example. If you would rather skip the spreadsheet, the equipment payment calculator computes all of this automatically in its fourth step, including break-even miles and a plain-language profit verdict.

The cost per mile formula

Cost per mile is total monthly cost divided by total monthly miles:

CPM = (fixed costs + variable costs) / miles driven

Fixed costs show up whether the wheels turn or not: truck payment, insurance, ELD and software subscriptions, permits, plates. Variable costs scale with miles: fuel, maintenance, tires, dispatch fees, tolls, and driver pay when it is paid per mile.

The formula is simple. Getting an honest total cost is where people go wrong, because the expense list is longer than the obvious one.

The expenses everyone forgets

Ask a new owner-operator their costs and you will hear truck payment, fuel, insurance. The number that comes out of that list is a fantasy. Here is what the full list looks like, matching the field set the calculator uses:

• ELD and software. Fifty to a hundred dollars a month for the electronic logging device and the apps around it. Small, but it is a fixed cost and it belongs in the math.
• Dispatch fees. Running under a dispatcher typically costs 5 to 8 percent of gross revenue. On $21,000 of monthly revenue, 5 percent is $1,050. Forgetting this one line is the difference between a profitable month and a break-even month.
• Maintenance escrow. Trucks break. The operators who survive are the ones who pay the maintenance account before it sends an invoice. Fifteen cents per mile is a reasonable escrow for a used Class 8 truck. Skipping it does not remove the cost; it just schedules the surprise.
• Driver pay. Even if the driver is you. Paying yourself per mile forces the business to stand on its own. If the truck only profits when the driver works for free, the truck is not profitable; the driver is just unpaid.
• Tires and tolls. They hide inside maintenance and trip costs, but on certain lanes tolls alone can add real money per mile.

The 2026 benchmark

ATRI’s all-in operational cost for trucking runs about $2.26 to $2.34 per mile in 2026, including driver pay, fuel, truck and trailer payments, maintenance, insurance, and the rest. That is the industry average across fleets of every size, so treat it as a sanity check, not a target. A lean single-truck operation can run well under it. An operation paying 22 percent interest on an old truck with a driver can run well over it.

If your calculated cost per mile lands far from that band, in either direction, recheck the inputs before you trust the number.

Worked example: 10,000 miles a month

One used semi truck, one driver, 10,000 miles a month, freight averaging $2.10 per mile:

Cost per mile: $17,010 / 10,000 = $1.70. Revenue per mile is $2.10, so the spread is $0.40 a mile, or $3,990 a month, a net margin of about 19 percent. Healthy.

Now watch what the forgotten lines do. Strip out dispatch, maintenance escrow, and driver pay and the “cost” drops to $9,960, a fake CPM of about $1.00. That operator thinks every $1.50 load is a winner. It is not. At $1.50 a mile the real operation loses $2,000 a month.

This is also why miles matter as much as rate. The fixed costs ($2,960 here) get divided by miles. At 8,000 miles a month the same truck costs $1.87 a mile. At 12,000 miles it costs $1.50. Parked trucks are the most expensive trucks.

From cost per mile to break-even

Two numbers fall out of the math once you have it:

• Break-even rate per mile: the minimum rate you can haul at before the truck loses money. In the example, roughly $1.70. Every booking decision becomes a one-glance comparison.
• Break-even miles: how many miles you need to run at your current rate before the month turns profitable. Below that number, the month is a loss no matter how hard you drive.

Both numbers move with your financing. A balloon or TRAC lease drops the monthly payment, which drops the fixed costs, which drops the break-even rate. The financing types breakdown shows how each structure shifts that math, and our owner operator profit calculator guide walks through what a healthy margin looks like once the costs are honest.

Do it in two minutes instead of building a spreadsheet

Step 4 of the calculator takes your revenue, mileage, fuel, insurance, maintenance escrow, ELD cost, dispatch fee, and driver pay, then hands back cost per mile, break-even rate, break-even miles, monthly cash flow, and a verdict: strong, workable, tight, or underwater. Same math as this guide, none of the spreadsheet maintenance.

Run your real numbers. The freight market will not wait for you to find out whether the truck pays for itself.