What's the best month to buy a used car in the UK?

Late February and late August, just before the March and September plate changes. Dealers are keen to clear outgoing-plate stock and part-exchanges are piling up on the forecourt.

Do dealers really discount at the end of a quarter?

Yes. Sales targets and bonuses reset each quarter, so the final days of March, June, September and December are when a dealer is most likely to say yes to a discount.

When should I buy a used convertible?

November to February. Soft-top prices rise with the spring sunshine, so buying in the cold can save £800 to £1,500 on a £10,000 to £15,000 car.

Does the March plate change affect older used cars?

Barely. The value knock lands on nearly-new cars sitting on the outgoing plate. A three-year-old car has already taken its depreciation hit and is largely unaffected.

The Best Time of Year to Buy a Used Car in the UK — and Why

There’s no single date when every used car in Britain suddenly drops in price. But there are definitely windows in the year when the odds tilt your way — when dealers are keener to do a deal, when part-exchange stock is piling up, and when the car you’ve got your eye on is briefly out of fashion. Get the timing roughly right and you can realistically save several hundred pounds, or get a noticeably better car for the same money.

Here’s how the UK car year actually behaves.

Why timing moves the price at all

A used car isn’t priced by magic. It’s priced by what the dealer paid for it, what margin they need, how long it’s been sitting on the forecourt, and how many other people are waving money at them that week. Timing only really affects the last two — but those two matter far more than most buyers realise.

A car that’s been in stock for 60 days or more is quietly costing the dealer money. Floorplan finance, insurance and valeting add up to somewhere between £3 and £8 per car per day. At 90 days, plenty of dealers will take a thin margin just to stop the bleeding. If you turn up at the right moment, that’s your leverage.

The plate change: March and September

Two new registration plates land every year — 1 March and 1 September. March uses the year number (25 in 2025), September uses the year plus 50 (75 in 2025). The moment a new plate appears, every car on the previous plate suddenly looks a year older in the classifieds, even if it was registered three weeks earlier.

That has two effects, and both can work in your favour.

Why a new plate hurts the car you’re about to buy

Nearly-new cars take a small but real value knock when the plate rolls over. If you’re buying something six to eighteen months old, you’re effectively buying into a market that has just been nudged downwards — and the dealer knows it.

The sweet spot: late February and late August

The last fortnight before a plate change is usually the softest window for nearly-new stock. Dealers want the outgoing plate cleared, part-exchanges are arriving in bulk as new car buyers trade in, and sales targets are looming. On a typical £15,000 to £20,000 nearly-new car, a few hundred pounds to £1,000 off is a realistic ask — especially on something that’s been in stock a while.

If you’re buying a car that’s three years old or more, the plate change matters much less. The depreciation hit already happened, and the market for that car barely flinches.

End of quarter: the dealer target effect

Most franchised dealers work to monthly and quarterly targets set by the manufacturer, and sales staff have bonuses riding on hitting them. That bonus can be worth thousands to the person across the desk, which makes a £500 discount worth giving away in the last week of a quarter.

Dates worth circling

The last three working days of any month
The last week of March, June, September and December
The quiet week between Christmas and New Year, when forecourts are empty and staff are counting down
Any wet Tuesday in November

The best combination is simple: end of month, a car that’s been in stock over 60 days, and a quiet weekday when you’re the only person in the showroom.

Seasonal demand: convertibles, 4x4s and the weather

This is where the calendar gets genuinely interesting, because different cars go in and out of fashion with the seasons.

Convertibles: buy in the cold

A convertible’s price is driven by optimism. In May, a sunny weekend sends soft-top prices climbing. By November, the same car is a hard sell and it sits there looking expensive to keep. The swing is real: on a £10,000 to £15,000 used convertible you can easily see £800 to £1,500 between a February purchase and a May one.

Buy in November to February, and enjoy it from April. Just do your checks properly whatever the weather — damp carpets, mould around the hood, a misted rear screen and a boot that smells of pond are all clues. Take it out in the rain and look for leaks.

4x4s and SUVs: a smaller swing

The received wisdom is to buy a 4x4 in summer. In practice the UK swing is more modest — perhaps 3% to 6% — because SUVs sell all year round. Where you do notice it is proper off-roaders and pickups, which firm up in winter when anyone facing a muddy lane, a horse box or a flooded track starts shopping. Late summer, when families are on holiday and the plate change is looming, is the softest window.

The rest of the year in brief

January: quiet forecourts and motivated sellers, but trade-in stock is thin and choice is limited.
March to May: the busiest buying period of the year. Prices firm, haggling room shrinks.
August: quiet, holiday season, plate change on the horizon. One of the best all-round months.
October to November: post-plate lull, dealers building towards year end. Good for SUVs and 4x4s.

The honest caveat

Waiting eight months to save £500 is usually a bad trade if you need a car now. Insurance, servicing, repairs and hire cars all eat into a saving fast, and the car you wanted may well be gone. Use timing as a bargaining tool rather than a reason to put your life on hold.

What matters more than the month

Condition, mileage, service history and how you pay will move the numbers far more than the calendar ever will. A car with a full service record and two keys is worth paying more for. A car with a patchy history and a suspiciously cheap price rarely ends well.

A quick pre-purchase checklist

Check the MOT history free on gov.uk — the advisories tell you more than the pass or fail
Confirm the service book stamps, invoices and mileage all line up
Run an HPI-style check for outstanding finance, write-offs and theft markers
Make sure the V5C is in the seller’s name, the VIN matches, and there are two keys
Look for four matching tyres with at least 3mm of tread
Test drive from cold for 20 minutes plus, including a slow full-lock manoeuvre
Test every window, heated seat, camera and the air con on maximum
On anything over £8,000, budget £150 to £300 for an independent inspection

The takeaway

If you can be flexible, aim for late February or late August, in the final few days of the month or quarter, on a car that’s been in stock for a while. If you’re after a convertible, buy it in the winter. If it’s a proper 4x4, late summer is your friend. And whatever the date, always negotiate on the car in front of you rather than the one in the advert.

When you’re ready to make the change, UpCars.uk is a good place to start — the cars there are checked over properly before they’re ever listed, which takes a lot of the guesswork out of a job that already has plenty.