Owner-Operator · Maintenance
Truck Maintenance Budget: What to Set Aside Per Mile
The repair that ends a one-truck operation is never a surprise mechanically — it is a surprise financially. Every wear item on the truck has a predictable life. Convert those lives into cents per mile and the big bills stop being emergencies.
Written and reviewed by Christopher Scott Sneed, 30+ year diesel technician, founder of Blue Collar Empire. Updated 2026-08-28.
Three buckets, not one
- Preventive maintenance: oil and filters, greasing, DOT inspection, coolant and fuel filter service.
- Wear items: tires, brakes, drums or rotors, batteries, belts, clutch or transmission service.
- Major components: engine work, aftertreatment, turbo, transmission, differential, EGR cooler.
Convert life into cents per mile
Take a component's replacement cost and divide by the miles you expect it to last. A set of drive tires at $3,600 lasting 120,000 miles is 3 cents a mile. Do that for every wear item, add the preventive services at their intervals, and you have a defensible maintenance number for your cost-per-mile math.
The major-component reserve
Big-ticket work is not an average, it is a lump. Set aside a separate per-mile amount into an account you do not touch, sized so that the reserve can cover the largest single repair your truck is realistically exposed to. On an older truck that means the engine or the aftertreatment; on a newer truck under warranty it means the deductible and the downtime.
Downtime costs more than the invoice
A week in the shop is a week of fixed costs with no revenue. When you compare a preventive repair now against waiting, price the days off the road, not just the parts.
Records make the next repair cheaper
Keep every invoice with mileage, and log every fault code and what fixed it. That history is what stops a shop from starting from zero on a repeat complaint, and it is what a buyer pays extra for when you sell the truck.
Tools that do this work for you
Everything above is included in the Blue Collar Empire membership — $14.99 a month.
Frequently asked questions
- How much should I budget per mile for maintenance?
- Build it from your own components rather than a rule of thumb: replacement cost divided by expected life for each wear item, plus preventive services at their intervals, plus a separate major-component reserve.
- Should the maintenance reserve be in a separate account?
- Yes. A reserve that lives in the operating account gets spent. Move it out every settlement and treat it as untouchable.