Vehicle EconomicsLease Mileage Overage Calculator
Mileage overage fees build up quietly over the life of a lease, one per-mile charge at a time. Project your current pace forward to see what's coming.
Why this comes up
A mileage overage at lease turn-in can be one of the most expensive surprises in leasing, and it's entirely avoidable if you catch the pace early enough to adjust. This projects where your actual driving so far puts you at lease end, not just a guess.
How we calculated this
We compute your actual monthly pace (miles driven divided by months elapsed) and project it across the full lease term. If that projection exceeds your total allowance, the excess miles are charged at your contract's overage fee per mile.
Worked example, using this page's own defaults (36,000-mile allowance over 36 months, 6,000 miles in 5 months): that pace projects well past the allowance, run the calculator above to check your own numbers before it's too late to adjust.
What this means
- A small monthly pace overage compounds across every remaining month of the lease, catching it early gives you the most room to correct course.
- If the projected overage cost is significant, it's worth comparing against buying extra miles upfront or a lease buyout instead of paying the fee at turn-in.
- This does not model excess wear charges, only mileage, keep those separate when budgeting for lease-end costs.
Limitations
This projects your current pace forward linearly; actual future driving may differ. The overage fee is your contract's stated rate, not a universal figure. See Methodology.
Methodology
This engine is built on Vehicle Economics' lease payment and buyout model: cap cost, residual, and money factor split into a depreciation charge and a rent charge. See Methodology for the full detail.