Maintenance Reserve per Mile
The cents per mile to set aside for tires, routine PM.
Example
You enter
- Tire set cost ($) 4000
- Tire life (mi) 80000
- PM service cost ($) 350
- PM interval (mi) 25000
- Major reserve ($/mi, optional) 0.1
- Monthly miles (optional) 10000
You get
- Total reserve $0.1640/mi
- Monthly set-aside $1,640.00
No published worked example is on file for this calculation. It is checked against a hand-worked derivation of its method and an independent reference test.
Details, formula, and sources
ScopeThe cents per mile to set aside for tires, routine PM, and a major-component reserve so the bills are funded when they land, with the monthly set-aside. Feeds the variable cost in cost per mile.
Formula or tableTotal reserve cpm = tire set / tire life + PM cost / PM interval + major-component reserve; monthly = total cpm x monthly miles.
Source and editionFirst-principles owner-operator reserve discipline.
Free accessFirst-principles; no proprietary source reproduced.
What governsMath aid for personal verification. The ELD on the truck and the carrier tariff are the legal record. State limits may be lower than federal.
API field namestire_set_cost, tire_life_mi, pm_cost, pm_interval_mi, major_reserve_cpm, monthly_miles, total_cpm, monthly_reserve
- Major-component reserve a few cents per mile over the truck's life (editable)owner-operator practice