Car Lease Mileage Calculator
Enter your remaining lease term, allowed mileage, current odometer, and expected monthly mileage to project your overage cost before it happens.
Monthly mileage projection
Projected odometer reading at each future month, assuming your expected monthly mileage stays constant.
How it works
Projected total mileage equals your current odometer plus expected monthly mileage times the remaining lease-term months:
Projected total = current mileage + (monthly mileage × remaining months)
Overage miles is the amount by which that projection exceeds your total allowed mileage (zero if it doesn't exceed it), and overage cost multiplies overage miles by your per-mile rate.
Worked example
18 months remaining, 36,000 mi allowed, 18,000 mi on the odometer, 1,200 mi/month expected: projected total = 18,000 + 1,200 × 18 = 39,600 mi, which is 3,600 mi over the 36,000 mi allowance — at $0.25/mi that's a $900 projected overage charge.
Assumptions
- Monthly mileage is assumed constant for the rest of the term.
- Figures are based on your lease agreement's stated allowance and per-mile rate — confirm both against your actual contract.
Reference
For exact terms, consult your lease agreement or leasing company directly.
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Frequently asked questions
How is lease mileage overage calculated?
Projected total mileage is compared to your allowed mileage, and any excess is multiplied by the per-mile overage rate.
Can I avoid a lease overage charge?
Drive less for the rest of the term, negotiate a mileage adjustment, or purchase the vehicle instead of returning it.
Is the monthly projection exact?
No — it assumes constant monthly mileage. Update the field periodically for a more current projection.