Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Current projected maintenance CPM
$0.168
Projected annual maintenance cost
$18,533
Projected CPM one year from now
$0.202
Year-over-year CPM increase
$0.034
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How to use this
- 1Enter base maintenance cpm (new truck) ($/mi).
- 2Enter current odometer (mi).
- 3Enter cost escalation per 100k miles (%).
- 4Enter annual miles driven (mi/yr).
- 5Read your current projected maintenance cpm on the right — it updates as you type.
- 6Hit Share to keep the scenario or send it to someone.
About this calculator
Maintenance cost per mile is not flat over a truck's life — it starts low under warranty, climbs steadily as components wear, and can spike hard past 500,000-600,000 miles as major systems (engine, transmission, aftertreatment) start failing together. This calculator applies an age-based escalation curve to a base maintenance CPM you set for a new truck, projecting cost per mile at your current odometer reading. It's a planning tool for deciding when a truck has crossed from 'routine maintenance' territory into 'trade it before the big bills hit' territory — the point where projected CPM exceeds what a newer truck payment would cost you instead.
Worked example
Using the values the calculator loads with:
Inputs
- Base maintenance CPM (new truck): 0.08 $/mi
- Current odometer: 450000 mi
- Cost escalation per 100k miles: 18 %
- Annual miles driven: 110000 mi/yr
Results
- Current projected maintenance CPM: $0.168
- Projected annual maintenance cost: $18,533
- Projected CPM one year from now: $0.202
- Year-over-year CPM increase: $0.034
What each field means
Inputs
- Base maintenance CPM (new truck) ($/mi)
- The base maintenance cpm (new truck) used in the calculation, measured in $/mi. Starts at 0.08 $/mi so you have a working example on load.
- Current odometer (mi)
- The current odometer used in the calculation, measured in mi. Starts at 450000 mi so you have a working example on load.
- Cost escalation per 100k miles (%)
- The cost escalation per 100k miles used in the calculation, measured in %. Starts at 18 % so you have a working example on load.
- Annual miles driven (mi/yr)
- The annual miles driven used in the calculation, measured in mi/yr. Starts at 110000 mi/yr so you have a working example on load.
Results
- Current projected maintenance CPM
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Projected annual maintenance cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Projected CPM one year from now
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Year-over-year CPM increase
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
Where does the escalation rate number come from?
It varies by spec and duty cycle, but fleet maintenance data commonly shows maintenance cost roughly doubling to tripling between 100,000 miles and 500,000-600,000 miles on a Class 8 truck, which corresponds to roughly 15-25% escalation per 100k miles depending on how well it's been maintained.
At what CPM should I consider trading the truck?
There's no universal number, but many fleets use the rule that once projected maintenance CPM approaches or exceeds the CPM-equivalent of a new truck payment (often $0.35-0.45/mi on a typical note), it's time to seriously evaluate trading rather than absorbing the next major repair.
Does this account for a specific upcoming repair?
No, this is a smoothed trend estimate. If you know a $15,000 transmission rebuild is coming in the next 20,000 miles, add that as a one-time cost on top of this trend rather than expecting the curve to capture it precisely.
Does preventive maintenance change this curve?
Yes, significantly. Trucks on strict PM schedules (oil, filters, brake, and cooling system service on time) tend to sit toward the lower end of the escalation range; deferred maintenance accelerates the curve and often causes compounding failures.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Maintenance Cost Per Mile by Truck Age Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/maintenance-cost-per-mile-age
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/maintenance-cost-per-mile-age" target="_blank" rel="noopener">Maintenance Cost Per Mile by Truck Age Calculator — RevenueLab</a> (2026).</p>
Source: [Maintenance Cost Per Mile by Truck Age Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/maintenance-cost-per-mile-age) (2026).