About the Lease Mileage Overage Calculator
This lease mileage overage calculator tells you whether you are on track to go over your lease mileage allowance and what it will cost if you do. Enter the lease length, the yearly mileage allowance, how many months you are into the lease and how many miles you have driven so far, plus the per-mile charge in your contract. It projects your mileage at turn-in based on your current pace and estimates the excess-mileage fee.
Use it a few times during a lease: halfway through to decide whether to slow down, buy extra miles from the leasing company (usually cheaper than paying at the end), or plan to buy the car out instead of returning it. It also shows the monthly mileage you would need to stay at or below the limit for the rest of the term.
Mileage on most leases is counted from the odometer reading on your contract, so enter miles driven since the lease began, not the total odometer reading. Excess-mile rates of roughly 15 to 30 cents per mile are common; check your lease agreement for the exact rate and whether any extra miles you purchased are already included in the allowance.
With the default inputs, the projected excess-mileage charge is $1,000.00. Change any value above to recalculate instantly.
How to use the lease mileage overage calculator
- 1Find the lease term, yearly mileage allowance and excess-mile rate in your lease contract.
- 2Subtract the odometer reading on the contract from your current odometer.
- 3Enter the months elapsed and the miles driven so far.
- 4Read the projected miles and excess charge at turn-in.
- 5Use the monthly limit to adjust your driving or decide whether to buy extra miles.
Formula and method
Your total allowance is the yearly allowance × term ÷ 12, plus any extra miles you bought up front. Your current pace is the miles driven since the lease started divided by the months elapsed, and the projection assumes you keep driving at that pace for the remaining months.
Any projected miles above the allowance are multiplied by the excess-mileage rate in your contract to estimate the turn-in charge. The monthly limit spreads the miles you still have left evenly across the remaining months. Leasing companies typically bill the overage only if you return the car; buying it out avoids the charge.
- Driven
- Miles driven since the lease began
- Allowed
- Yearly allowance × term ÷ 12 + purchased extra miles
- Rate
- Excess-mileage charge per mile from the lease contract
Worked examples
Halfway through a 36-month, 12,000-mile lease
You have driven 20,000 miles in 18 months, a pace of 1,111 miles a month, so you are projected to reach 40,000 miles against a 36,000-mile allowance. The 4,000 excess miles at $0.25 would cost $1,000, unless you hold to about 889 miles a month for the last 18 months.
24-month, 10,000-mile lease after 10 months
A pace of 950 miles a month projects to 22,800 miles at the end of 24 months, 2,800 over the 20,000 allowed. At $0.20 per mile that is a $560 charge; driving 750 miles a month from here would avoid it.
Low-mileage driver with extra miles bought
The allowance is 10,000 × 39 ÷ 12 = 32,500 miles plus 3,000 purchased, or 35,500. Driving 22,000 miles in 30 months projects to 28,600, comfortably under, so no excess charge is due.
Frequently asked questions
How much does it cost to go over lease mileage?+
Most leases charge between about 15 and 30 cents for every mile over the allowance, with some luxury brands charging more. The rate is printed in the lease agreement. Going 5,000 miles over at $0.25 a mile costs $1,250 at turn-in.
Is it cheaper to buy extra lease miles in advance?+
Usually yes. Many leasing companies sell additional miles at signing (and sometimes mid-lease) for less than the end-of-lease excess rate, and some refund unused pre-purchased miles. Ask your lender before you reach the end of the term.
What happens if I am over my lease miles?+
If you return the car you pay the excess-mileage charge on the turn-in bill. If you buy the car at the lease-end purchase price, or trade it in to a dealer who pays off the lease, the mileage charge normally does not apply.
How are lease miles calculated?+
Allowed miles are the yearly allowance multiplied by the number of years in the lease, counted from the odometer reading recorded on the lease contract, not from zero. A 36-month lease at 12,000 miles per year allows 36,000 miles.
Can I get credit for unused lease miles?+
Standard leases generally do not pay you for miles you did not use, although a low-mileage car may give you more equity if you buy it out or trade it in. Some lenders refund miles you pre-purchased but did not use.
Results are estimates for educational purposes and are not financial advice. Rates, fees and terms vary — confirm with your lender or a licensed advisor before making decisions.