Know your break-even before you book the load.

Deadhead is the mile everyone forgets to price

Here is the gap this calculator exists to close. Say your total costs come to $18,500 a month and you run 10,000 miles. Divide one by the other and you get $1.85 per mile. That is the number nearly every cost-per-mile calculator hands you, and it feels like the answer.

But you did not get paid for 10,000 miles. At 15% deadhead you got paid for 8,500. The same $18,500 spread over 8,500 paid miles is $2.18 per loaded mile — thirty-three cents higher. Book a load at $2.00 a mile thinking you are forty cents to the good, and you are actually eighteen cents under water on every mile of it. On a 1,200-mile run that is a $216 loss on a load that looked profitable when you accepted it.

Empty miles do not stop costing money. They burn the same fuel, wear the same tires, add the same hours to the engine and the same time to your clock. The only thing they do not do is generate revenue — which means every empty mile has to be paid for by a loaded one. That is not an accounting nicety; it is the difference between a rate that works and a rate that quietly does not.

Fixed costs versus variable costs

Fixed costs are what you owe whether the truck runs or sits: the truck and trailer payment, insurance, permits and licensing (IRP, IFTA decals, UCR, the heavy vehicle use tax spread monthly), your ELD and software subscriptions, bookkeeping and tax prep, parking. They do not care about mileage — which is exactly why they are dangerous. Fixed costs per mile fall as you run more miles and spike when you sit. A week down for a repair does not pause the truck note.

Variable costs scale with the odometer: fuel, maintenance and repairs, tires, tolls, and driver pay if you employ a driver rather than driving yourself. Fuel is almost always the largest single line, which is why the calculator lets you enter it either as a flat cost per mile or as fuel price divided by MPG. Entering price and MPG separately is worth doing at least once, because it shows you how much a half-mile-per-gallon change is really worth: at $3.85 a gallon, going from 6.0 to 6.5 MPG saves about five cents a mile — around $6,000 a year on 120,000 miles.

The maintenance reserve most people skip

There is a difference between what you spent on maintenance this month and what maintenance actually costs you. This month you bought an oil change. You did not buy the turbo, the DPF, the injectors, the clutch or the set of drives — but you are using all of them up, mile by mile, and one day the bill arrives all at once.

That is what the maintenance reserve line is for: a per-mile accrual for the repair that has not happened yet. Whatever figure you choose, the point is that it is a real cost of the mile you just ran, and it belongs in the rate you quote. Ignoring it is the classic owner-operator mistake — the cost per mile looks excellent for eighteen months, and then a five-figure engine job goes on a credit card at 24% because there was no reserve. Carriers who fold a reserve into their cost per mile and actually move that money into a separate account do not have that month.

Break-even, margin, and what to charge

Your break-even rate is your cost per loaded mile. It is the rate at which you finish the month exactly even: bills paid, nothing earned. It is a floor, not a target.

To turn it into a rate you should actually quote, apply a margin. The calculator uses margin on revenue, which is how brokers, factors and lenders all talk about it: a 15% margin means your costs are 85% of the rate, so the rate is your cost divided by 0.85. That is a slightly higher number than adding 15% to your cost, and the difference is not a rounding error — marking up cost by 15% actually yields only a 13% margin. Getting this backwards is a common way to quote yourself out of the profit you thought you had built in.

One caution: this is a pre-tax number and it does not include your own pay unless you put it in. If you drive the truck yourself and left driver pay at zero, the "profit" figure is the money the business made and your wages for the month. Decide which one you are looking at before you use it to judge whether a lane is worth running.

How to use this number day to day

Write your break-even rate on something you can see while you are booking. Rate negotiation gets much simpler when there is a number you will not go under, because the argument stops being about what the market is paying and starts being about what the load costs you to haul.

Then rebuild the figure quarterly. Insurance renews, fuel moves, the truck ages into a higher maintenance bracket, and your deadhead percentage drifts with the lanes you are running. A cost per mile from last year is a guess. Pull your real deadhead from trip records rather than estimating it — the difference between 10% and 20% deadhead is roughly a quarter a mile on a $2 cost base, which is most of a small carrier's margin. Fuel purchasing is worth the same discipline; see the IFTA calculator for why the cheapest sign on the interstate is not always the cheapest fuel once fuel tax settles on the quarterly return.

If you pay drivers, the same math runs one level down. Per-mile pay, accessorials and deductions all have to reconcile against the revenue the load produced, which is why settlement accuracy and cost per mile are the same problem viewed from two ends. Our settlement tools keep those calculations transparent, and the driver resource library covers what drivers should be checking on their own statements.