How to use this calculator
- Enter expected total distance at return, contract total allowance, charge per excess unit.
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Charge=max(0,expected distance−allowance)×charge per unit.
Assumptions and limitations
Use total contract allowance and consistent units; wear, early return and taxes are not included.
Worked example
With expected total distance at return = 65000, contract total allowance = 60000, charge per excess unit = 0.2, excess distance is approximately 5000.
What the result means
Estimate an end-of-lease mileage bill from your contract.
Common questions
How should I interpret excess distance?
Estimate an end-of-lease mileage bill from your contract.
What should I check before using this result?
Use total contract allowance and consistent units; wear, early return and taxes are not included.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.