Car lease mileage & excess charges explained
Updated August 2026 · 3 min read
A lease or hire agreement sets an annual mileage allowance you agree upfront. Go over it and you pay an excess-mileage charge — a set pence-per-mile rate — for every extra mile, worked out when you hand the car back. Estimating your real annual mileage accurately is the way to avoid a surprise bill.
How mileage allowances work
When you take out a lease or longer hire, you agree an annual mileage — common bands are 8,000, 10,000 or 15,000 miles a year. The allowance is one of the biggest levers on your monthly: a higher limit costs a bit more each month but buys you headroom. The figure is a total across the whole agreement, so a good year and a quiet year can balance out — it is your average that matters, not any single month.
What are excess-mileage charges?
If you drive more than your total allowance over the agreement, you pay an excess-mileage charge for each mile over. It is a fixed pence-per-mile rate written into your agreement at the very start, so there are no surprises about the rate — only about how many miles you rack up. Rates vary by vehicle, and are typically higher on premium and prestige models. It is charged once, at the end, when the actual mileage is confirmed.
How to choose the right allowance
Work it out from real life, not a guess. Add up your commute (days per week × round-trip miles × ~45 working weeks), then add regular trips — the school run, seeing family, weekends away — and a buffer for the unexpected. It is almost always cheaper to buy a slightly higher allowance upfront than to pay excess mileage later, because the upfront rate is lower. If in doubt, round up. Tell us your real annual mileage when you get a quote and we will match a sensible allowance.
What if your mileage changes mid-agreement?
Life changes — a new job with a longer commute, or suddenly working from home. Some providers let you adjust the allowance partway through; many do not. If you can see early that you are going to go over, it is worth asking the supplier — sorting it mid-term is sometimes cheaper than paying excess at the end. This is also where a shorter, flexible agreement earns its keep: you are never locked to a mileage guess for years.
Low mileage? You could pay less
If you barely drive, do not over-buy mileage — a lower allowance means a lower monthly. And if your driving is genuinely light or seasonal, a short-term or pay-monthly hire can beat a long lease, because you are not paying for a big mileage bank you will never use. Match the agreement to how you actually drive and you stop paying for headroom you do not need.
FAQs
What happens if I go over my lease mileage?
You pay an excess-mileage charge — a fixed pence-per-mile rate set in your agreement at the start — for every mile over your total allowance. It is calculated once, when you hand the car back and the actual mileage is confirmed.
How much is excess mileage on a car lease?
It is a set pence-per-mile rate written into your agreement, and it varies by vehicle — usually higher on premium and prestige cars. Because the rate is agreed upfront, there are no surprises about the price, only about how many extra miles you drive.
Is it cheaper to add mileage upfront or pay excess later?
Almost always cheaper to buy a higher allowance upfront, because the upfront per-mile cost is lower than the excess rate. If you expect to drive a lot, round your allowance up rather than risk an excess bill at the end.
Can I change my mileage allowance during the agreement?
Some providers allow a mid-term adjustment, many do not. If you can see you will go over, ask the supplier early — arranging it mid-agreement is sometimes cheaper than paying excess at the end. A flexible short-term agreement avoids the problem entirely.
Do unused miles get refunded?
Usually not — the allowance is what you pay for, whether or not you use it all. That is why it pays to estimate your real mileage rather than over-buying. If you drive very little, a lower allowance or short-term hire keeps costs down.
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