Lease Mileage Overage Calculator
Most car leases include a mileage allowance, a cap on how far you can drive over the term before extra charges apply. Drive past that cap and the lender bills you a per-mile excess fee at the end of the lease, a cost many drivers do not see coming until the return inspection. This calculator helps you estimate that bill before lease end so there are no surprises. Enter the total miles you have driven or expect to drive, the mileage allowance written into your contract, and the per-mile excess charge your lease specifies. The tool subtracts the allowance from your miles to find how many excess miles you have, then multiplies those excess miles by your rate to produce the overage fee. If you are under the allowance, the charge is zero. The per-mile rate is left fully editable because it is set by your individual lease, commonly between 15 and 30 cents, and the Consumer Financial Protection Bureau advises checking your own agreement rather than assuming a figure. Every number here is computed deterministically from the simple formula shown below, with a worked example that reconciles exactly to the calculator so you can follow each step and plan ahead.
The overage fee is the miles you drove over your allowance, multiplied by the per-mile rate: (miles driven minus allowance) x rate. Driving 45,000 miles against a 36,000 mile allowance at $0.25 per mile gives 9,000 excess miles and an overage charge of $2,250.00.
Lease mileage overage formula
Overage fee = ( miles driven - mileage allowance ) x rate per mile
If miles driven is less than or equal to the allowance, overage fee = 0
miles driven = total miles over the lease term
mileage allowance = miles permitted by the contract
rate per mile = excess charge stated in the lease
Excess miles are the miles beyond your contract cap. Multiply them by the per-mile rate in your lease to get the charge. Driving under the allowance gives zero excess miles and no overage fee.
Worked example
Suppose you drive 45,000 miles on a lease with a 36,000 mile allowance and a 25 cent per-mile excess charge.
- Excess miles = 45,000 - 36,000 = 9,000
- Rate per mile = $0.25
- Overage fee = 9,000 x 0.25 = $2,250.00
The overage charge is $2,250.00. These are the calculator's default inputs, so the result above matches the widget exactly.
Overage at common per-mile rates
Charge for 9,000 excess miles at a range of typical lease rates.
| Rate per mile | Charge for 9,000 excess miles |
|---|---|
| $0.15 | $1,350.00 |
| $0.20 | $1,800.00 |
| $0.25 | $2,250.00 |
| $0.30 | $2,700.00 |
Rates vary by contract. Check your lease for the exact excess mileage charge.
Lease mileage overage calculator: frequently asked questions
What is a lease mileage overage charge?
A lease mileage overage charge, sometimes called excess mileage or over-mileage, is a fee you pay at the end of a car lease for every mile driven beyond the agreed allowance in your contract. The lease sets an annual or total mileage limit and a per-mile rate, often between 15 and 30 cents, that applies to each mile over the cap. Your lease agreement states both numbers.
How is the overage fee calculated?
Subtract the contract mileage allowance from the total miles you actually drove to get your excess miles. If the result is positive, multiply it by the per-mile excess charge from your lease. Excess miles times the rate equals the overage fee. If you drove fewer miles than the allowance, the excess is zero and no overage charge applies, though most leases do not refund unused miles.
What per-mile rate should I enter?
Use the exact excess mileage rate printed in your lease agreement. It is a fixed figure set when you signed, commonly 15 to 30 cents per mile depending on the vehicle and lender. Because the rate varies by contract, this calculator leaves it as an editable input rather than assuming a figure for you.
Can I avoid the overage charge?
Some lessees buy additional miles upfront at a lower rate, drive less near lease end, or buy the vehicle outright instead of returning it, which makes the mileage cap irrelevant. The Consumer Financial Protection Bureau recommends reviewing your lease terms early so you can plan. This tool only estimates the charge; check your contract for exact terms and any options.
Does this calculator include taxes or other end-of-lease fees?
No. It computes only the mileage overage charge, which is excess miles multiplied by your per-mile rate. End-of-lease bills can also include disposition fees, wear-and-tear charges and applicable sales tax. Those are separate line items set by your lease and your state, so check your agreement and final statement for the full amount due.
Official sources
- Auto leasing, mileage limits and end-of-lease charges guidance: US Consumer Financial Protection Bureau (CFPB). As at 25 June 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 25 June 2026. See our methodology. This is general information, not financial, tax, legal or investment advice.