How does mileage work on a lease?

2026-10-13 Silver hatchback on a country road illustrating how does mileage work on a lease.

When you lease a car or van, you agree a mileage allowance up front, and the monthly rental is set around it. Go over the total for the contract and you normally pay a per-mile excess charge when the vehicle is returned.

The detail

The allowance is set at the start. You choose an annual mileage, and the funder multiplies it by the length of the contract to get a total allowance. Contract hire is a rental, not a purchase, so the funder needs to estimate what the vehicle will be worth when it comes back. More miles usually means lower expected value, so a higher allowance generally means a higher monthly rental.

It is a total, not a yearly limit. Most agreements measure mileage across the whole term. Driving more in one year and less in another is usually fine, as long as the final reading is within the total. Check your own agreement, as the wording can vary by funder.

Excess mileage is charged per mile. If the odometer reading at the end is above the total allowance, you pay a set charge for each extra mile. The rate is stated in your quote and agreement before you sign. It differs between funders and vehicles, so read it as carefully as you read the monthly rental.

Unused miles are not normally refunded. If you come in under the allowance, you generally don't get money back. Some agreements have specific terms for this, so ask if it matters to you.

Estimating is the hard part. Look at your current odometer readings and service history, and think about any changes ahead, such as a new site, a bigger territory or more deliveries. Vans used for regular trade work often cover more miles than people expect. It is usually better to pick an allowance you are unlikely to exceed than to rely on paying excess charges.

Changing it mid-contract. Some funders will consider adjusting the allowance during the term, but this is at their discretion and may change the rental. Don't assume it will be available.

White van on a motorway, a detail in how does mileage work on a lease.

A worked example

This uses letters rather than made-up figures, so you can substitute your own numbers.

Your annual allowance is A miles.
The contract runs for Y years.
Your total allowance is A × Y miles.
The excess charge in your agreement is R per mile.

When the vehicle is returned, subtract the starting odometer reading from the final one. Call the result M, the miles driven over the term.

If M is less than or equal to A × Y, you have stayed within your allowance and there is no excess mileage charge.
If M is greater than A × Y, the excess is M − (A × Y) miles, and the charge is that number multiplied by R.

Before signing, you can also work backwards. Divide your expected total miles by the number of years and compare the answer with the annual allowance you are being quoted. If the two are close, consider whether a slightly higher allowance gives you more comfort.

Estate car on a Dales road, a worked example of how does mileage work on a lease.

Questions people ask

Can I change my mileage allowance after I've signed?

Sometimes, but it depends on the funder and is not guaranteed. A change would usually affect the monthly rental, so ask before you rely on it.

Is the mileage limit per year or for the whole contract?

Most agreements apply it across the whole term, but the wording differs between funders, so check the terms in your agreement.

What if I'm not sure how many miles I'll do?

Use your current odometer readings and service history as a starting point, and allow for any planned changes to how you use the vehicle. A broker can explain the options, but the final terms come from the funder.

Do I get anything back if I drive fewer miles than allowed?

Not normally. The rental is based on the allowance you chose, not the miles you actually drove, though some agreements have different terms.

Learn more about car leasing