PCP mileage limits are the annual mileage allowance you agree to when you sign your PCP agreement and they catch a lot of first-time buyers off guard, because going over that limit costs you money at the end of the contract.
Getting the figure right from the start is what keeps you from overspending. That's exactly what this guide walks through: how to calculate your mileage accurately, whether your limit can be changed mid-contract, and what it actually costs you if you go over.
How PCP mileage limits work
When you sign a Personal Contract Purchase (PCP) agreement, you agree to an annual mileage allowance upfront. The lender uses that figure to calculate the Guaranteed Future Value (GFV) – its prediction of what the car will be worth at contract end, which directly sets your monthly payments. Higher predicted mileage means lower GFV and higher monthly costs.
Mileage is assessed as a cumulative total at handback, not year by year. This means driving fewer miles one year and more the next lets the shortfall and surplus cancel out.
You can't reduce your agreed mileage allowance mid-contract. Lowering it offers no financial benefit to the lender and would disrupt the GFV calculation locked in at signing.
How are PCP excess mileage charges calculated?
PCP excess mileage charges work by multiplying the miles you've driven beyond your agreed contract total by a fixed per-mile rate set at signing.
The formula is straightforward: excess miles × pence per mile = total charge.
Mainstream PCP lenders charge between 5p and 30p for every mile over your agreed total. The exact rate depends on the car and the finance agreement. Mainstream cars typically attract 5p to 15p per mile, premium and luxury models 15p to 25p, and high-mileage specialist agreements 4p to 8p.
Drive 5,000 miles over your agreed total at 12p per mile and you owe £600 at handback – a single lump sum. The numbers add up pretty quickly.
PCP excess mileage charges fall due only at contract end, when the lender inspects the odometer. You won't see it on your monthly statement mid-contract.
You can run your own numbers through our PCP excess mileage calculator.
How your chosen mileage on PCP affects monthly and the balloon payment
The mileage figure you agree to signing shapes 2 things at once: your monthly payment and the balloon payment.
Mileage allowance and monthly payment size
A higher annual mileage allowance raises your monthly payment, because the lender predicts the car will depreciate more heavily. This means the lender sets a lower Guaranteed Future Value (GFV), which widens the gap between the car's purchase price and its predicted end-of-contract worth. That gap is what your monthly payments cover so the wider it gets, the more you pay each month.
The difference is measurable. On the same vehicle, a 30,000-mile contract costs around £418 a month; a 45,000-mile contract runs to around £451 or an extra £33 a month.
That £33 spread across a 3-year term costs less than a potential £1,500 lump-sum excess charge at handback, which is exactly why paying slightly more monthly beats risking the bill later. Most lenders quote multiple mileage tiers at the point of sale, so you can compare monthly figures side by side before you sign.
Mileage allowance and the Guaranteed Future Value
Your mileage allowance shapes the Guaranteed Future Value (GFV), the lender's estimate of what the car will be worth at contract end. The GFV then sets the balloon, the price you pay to keep the car.
Higher mileage means faster depreciation, so the lender sets a lower GFV. That lower GFV cuts both ways: it means a lower balloon if you want to keep the car, but also less equity if you plan to part-exchange before the contract ends. Pay the balloon, though, and neither of those trade-offs matters – no excess charge is due, regardless of the odometer reading.
What actually happens at the end of a PCP agreement if I have gone over my agreed mileage?
At the end of a PCP agreement, you have three choices: hand the car back to the finance company, buy it by paying the balloon payment, or part-exchange it with a dealer. Of those three, though, excess mileage charges only apply in one scenario – handing the car back.
The end-of-contract inspection and settlement
Hand the car back, and the finance company checks the odometer against your agreed total mileage for the full contract term. If you're over, they calculate the charge – miles exceeded multiplied by your per-mile rate – and send an invoice, typically within four weeks of handback.
That charge is a contractual obligation you signed for, so the finance company can enforce it. But lenders rarely pursue minor discrepancies through the courts, and some will negotiate on the final figure if you call before handback.
Choose the second option instead – pay the balloon payment and buy the car outright – and this whole question disappears: no excess mileage charge applies at all.
Part-exchanging an over-mileage PCP car
Part-exchange works differently, though the outcome ends up much the same. You won't receive a separate excess mileage invoice, but the dealer's trade-in valuation will reflect the higher mileage as a depreciation factor – so the financial impact lands either way, just through a different route.
If you'd have owed £600 in excess charges at handback, expect the dealer's offer to be roughly £600 lower than a same-model car within its limit. In other words, the cost is absorbed into the valuation rather than billed separately.
Mileage carryover and annual rollover rules
All of this hinges on how your mileage gets totted up in the first place. PCP mileage is assessed against your cumulative contract total at handback, not year by year, so a 3-year deal at 10,000 miles per year gives you a 30,000-mile total to work with, not a strict yearly cap.
Drive 8,000 miles in year 1 and 12,000 in year 2, and you're still on track – the shortfall offsets the surplus. Just check your agreement for "total contract mileage" or "aggregate mileage" first, so you know your lender actually uses this approach before you rely on it.
Can I change or increase my agreed mileage on a PCP agreement while it is still running?
Your agreed mileage can be increased mid-contract with most UK PCP lenders but it's not automatic, and acting early makes the difference between a smooth amendment and a flat refusal.
Contact your finance company directly, ideally around six months before your contract ends – leave it any later, and requests made in the final weeks are routinely declined.
Once the lender agrees, the mechanics work against you slightly: they recalculate your Guaranteed Future Value (GFV) based on the higher mileage, which lowers it, and adjusts your remaining monthly payments upward to cover the wider gap. Even so, that increase is almost always cheaper than paying a lump-sum excess charge at handback.
The reverse doesn't work though, you can't reduce your mileage allowance mid-contract, because lenders simply have no financial incentive to agree to it.
How to request a mileage amendment from your lender
Start with the right call: contact your finance company's customer service line, not the dealer, since the dealer has no power to amend the agreement. Have your account number, current odometer reading, and target new annual allowance ready before you dial.
Even with everything in order, approval isn't guaranteed: lenders weigh your contract stage, any negative equity, and your payment history. Once you've made the request, you can expect a decision within one to two weeks.
How increasing your allowance changes the monthly payment and GFV
That approval, once granted, has a direct knock-on effect: increasing your mileage allowance lowers the Guaranteed Future Value (GFV), widening the gap your monthly payments must cover. In practice, upgrading from a 30,000-mile contract at £418 a month to a 45,000-mile contract raises payments to £451, or an extra £33 each month.
Set against a potential £1,500 lump-sum excess charge at handback, though, that extra £33 looks like a bargain – the amendment pays for itself well before the contract ends.
When lenders decline a mid-contract amendment
Lenders decline mileage amendments most often when you're near the end of your contract, when negative equity makes the numbers unworkable, or when your credit profile has changed. Some lenders won't amend at all, because mileage is built into the Guaranteed Future Value (GFV) from day one.
A declined amendment doesn't leave you stuck: reduce your driving pace, part-exchange early, or accept the excess charge at handback.
What should you do if you are already over your PCP mileage pace?
If you suspect you'll overshoot your agreed mileage or you already have, 5 paths exist, in order of typical cost-effectiveness:
- Request a mid-contract amendment — contact your lender at least 6 months before the contract ends. Increasing your allowance mid-contract is usually cheaper than paying excess charges at handback.
- Reduce your driving pace — realistic for some, not for daily commuters.
- Part-exchange or trade early — a dealer settles your finance and rolls any shortfall into a new deal.
- Voluntary termination under Section 99 of the Consumer Credit Act — available once you've paid 50% of the total amount payable; mileage charge enforceability in this scenario is disputed.
- Accept the excess charge at handback — calculate your total liability using the per-mile rate in your agreement before deciding.
If you haven't signed yet, choosing the right allowance upfront avoids all of this — see the mileage selection section above.
Getting the right PCP deal as a high-mileage driver
As a high-mileage driver, you can find a PCP deal that fits your actual driving, but only if you go in with an accurate mileage figure and know where to look.
Getting the allowance right at signing is almost always cheaper than paying excess charges at handback. That's because a higher cap raises your monthly payment only slightly and predictably, spread evenly across the term while excess charges land as a single lump sum at the end.
Calculating your actual annual mileage before you sign
Don't guess – work it out from your actual driving patterns before you sign anything.
- Start with your commute – daily round-trip miles multiplied by 250 working days.
- Add holiday driving – number of trips multiplied by average miles per trip.
- Add leisure and errands across the year.
- Add a 10–15% buffer for unexpected trips.
Run the numbers and they add up fast: a 25-mile round-trip commute across 250 days, plus a few holidays and regular leisure driving, can easily reach 13,000 miles or more once the buffer's in. So choose an allowance that covers that figure comfortably.
Once you have a number, your previous car's MOT history gives you a useful cross-check on whether it holds up.
Negotiating a high-mileage allowance and finding the best deals
Ask the dealer or broker to quote the deal at multiple mileage levels – 10,000, 15,000, and 20,000 per year so you can see exactly how the monthly payment shifts. Lender policies vary significantly on mileage pricing, which is exactly why shopping multiple quotes matters.
But if no PCP deal accommodates your mileage at a sensible cost, Hire Purchase and personal loan agreements carry no mileage cap, making them a genuine alternative worth costing out.
Mileage limit ranges across lenders, vehicle types, and new vs used cars
Most new-car PCP deals sit between 10,000 and 20,000 miles per year, though some lenders will quote up to 70,000 miles annually. Used-car agreements work differently: they typically carry lower maximum allowances, because residual value is harder to predict on an older vehicle.
The same logic applies by vehicle type. Sports and luxury cars often face tighter caps, so mainstream models give you the most flexibility if you need a high allowance.
Will you have unused mileage at the end of your PCP? Here's what happens
Unused mileage on a PCP doesn't earn you a refund at the end of your agreement. Hand the car back having driven fewer miles than your allowance, and the finance company keeps the difference – no credit, no rebate, nothing.
That might feel unfair, but the logic is already baked into your monthly payments. A lower mileage allowance meant the lender predicted a higher residual value for the car, which lowered your monthly cost from day one so you already got the benefit, just spread across the term instead of handed back at the end.
The same logic explains the equity, too. The car may well be worth more than the Guaranteed Future Value (GFV) at handback, but that equity goes to the finance company.
This is why most people get the mileage decision backwards: overestimating is almost always the safer call. Paying a few extra pounds a month for a higher allowance is far cheaper than facing an excess charge bill at the end.
Does excess mileage affect your end-of-contract options?
Excess mileage reshapes which end-of-contract path makes financial sense for you, but all three remain open.
- Hand the car back to the lender – the finance company inspects the odometer and invoices you directly for every mile over the agreed limit. This is the only path where a separate excess mileage charge lands in your inbox.
- Part-exchange at a dealer – no separate invoice lands, but the dealer's trade-in valuation drops to reflect the higher mileage, which reduces the equity you carry into your next deposit.
- Pay the balloon and buy the car – excess mileage has zero impact here, because once you own the car outright, there's no mileage limit left to breach.
Which path fits best depends on how far over you are. If you're significantly over, buying via the balloon is the cleanest escape – it sidesteps the mileage question entirely. And if you're in genuine hardship instead, voluntary termination under Section 99 of the Consumer Credit Act offers a fourth route worth exploring.
Final words
Getting the mileage right before you sign is almost always cheaper than paying excess charges at handback. Three actions are worth taking now, because each one closes off a different way excess mileage can catch you out:
- Calculate your real annual mileage – add your daily commute, weekend trips, and holidays before agreeing to any allowance, then build in a 10–15% buffer so short-notice trips don't push you over.
- Contact your lender if you're already over pace – a mid-contract amendment is usually possible, but only if you act early, so don't wait until the contract ends.
- Compare deals with your chosen allowance built in – rates and caps vary between lenders, which is exactly why shopping around matters.
And if you do end up over your limit anyway, you still have options.
Read more about PCP:
- PCP car finance or bank loan
- What are PCP mileage limits?
- Advantages & Disadvantages of PCP
- What happens at the end of a PCP term?
- How to refinance a PCP balloon payment on a car?
- Can you trade in a PCP car to another dealer?
- PCP vs Lease: What’s Better for You?
- PCP vs. HP: What is the best option for me right now?
- What deposit will I need to pay for a PCP deal?
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