How do fleets set a maintenance reserve?
Track every repair and PM dollar for a year and divide by miles driven to get your own cost per mile. Older, high-mileage trucks cost more; newer trucks under warranty cost less. Save that amount per mile from every load into a separate account.
Your own history beats any rule of thumb. If you do not have a year of records, start tracking now and set a conservative reserve until the data builds up. Include tires, brakes, oil changes, filters and the occasional major repair.
What should a PM schedule include?
Oil and filter changes on a mileage or hour schedule, brake and tire checks, greasing, coolant and DEF checks, belts and hoses, lights and an inspection of the aftertreatment system. A written schedule per truck keeps it consistent.
Pair the schedule with a simple log: date, mileage, work done and cost. That log helps you set the reserve, supports warranty claims and shows a funder that the truck is cared for.
Should I outsource PM or do it in-house?
Small fleets usually outsource PM to a trusted shop because a bay, tools and a technician are expensive. Larger fleets often bring routine PM in-house once the volume justifies it.
Even when outsourcing, own the schedule: know each truck’s due dates and mileage, and do not wait for the shop to remind you. Compare shop rates and turnaround times once a year. Doing simple checks like tire pressures, lights and fluid levels in your own yard extends the time between shop visits.
| Item | Typical interval basis | Why it matters |
|---|---|---|
| Oil and filters | Miles or engine hours | Engine life |
| Brakes and tires | Every PM and pre-trip | Safety and inspections |
| Greasing | Every PM | Suspension and steering wear |
| Aftertreatment check | Every PM | Avoids derates |
Worked example: a big repair before the reserve is built
A four-truck fleet with $88,000 in average monthly deposits started a per-mile reserve three months ago, then faced a $16,000 overhaul on its oldest truck before the reserve had grown enough. Using an illustrative factor rate of 1.26, $16,000 would mean $20,160 repaid over roughly 6 months: 26 weekly payments of about $775.
That works out to about $3,360 a month, or 3.8% of the $88,000 this business deposits monthly, and the total cost of the money is $4,160. Funding covers the gap this once, and continuing the reserve means the next major repair is paid from savings instead.
For comparison, repaying the same $20,160 over 4 months would lift the monthly outlay to about $5,040, or 5.7% of deposits, and because shorter terms often carry a lower factor rate in practice, it is worth asking to see both before choosing.
| Average monthly deposits | $88,000 |
|---|---|
| Amount funded | $16,000 |
| Factor rate (illustrative) | 1.26 |
| Total repaid | $20,160 |
| Cost of the funding | $4,160 |
| Term | about 6 months |
| Weekly payment (26 payments) | $775 |
| Payments as a share of deposits | 3.8% |
Who this fits
Usually a fit
- Fleets starting a maintenance reserve
- Carriers hit by a major repair early in the plan
- Owners who want predictable monthly costs
When to skip it
- Fleets whose reserve already covers the repair
- Trucks near the end of their useful life
- Businesses without recent deposits
What you’ll typically need
- Recent business bank statements
- Maintenance logs if available
- Repair estimate
- Business details
Frequently asked questions
What is a good maintenance cost per mile?
It varies with truck age, miles and duty cycle. Your own records are the best guide; track a full year to set it.
Should maintenance money be in a separate account?
Many fleets keep it separate so it is not spent on fuel or payroll.
Can funding replace a maintenance reserve?
It can bridge a gap, but a reserve is cheaper over time. Use funding for surprises, not routine PM.
Does a 500 credit score rule me out for a major overhaul?
No. Applicants from 500 can be reviewed for a major overhaul; the deposit history does most of the work, and better credit typically improves the terms you are offered.
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Updated October 6, 2026