How early can you MOT a car without losing days?

Booking your MOT at the last minute is risky. If the car fails, it can't legally be driven except to a booked repair or retest. The rules allow you to test early without losing any of the time you've already paid for, but only within a specific window. It's not a small risk either: 29% of cars failed their first attempt in DVSA's 2023 data.

The rule in one sentence

You can take your MOT up to one month minus a day before your current certificate expires, and the new certificate will run from your old expiry date, not the test date.

In practice, this means testing early inside the window costs you nothing. You get a full year from your existing renewal date, plus the safety net of a valid certificate while any repairs are done.

Working out your earliest test date

Take your expiry date, go back one calendar month, then add one day.

1. Find your current expiry date. It's on your last MOT certificate, or you can look it up with our MOT due date checker.
2. Go back one calendar month. For 15 May, that's 15 April.
3. Add one day. That gives 16 April, the earliest date you can test without losing days.

If you'd rather not do it by hand, the MOT due date calculator does it for you and can add a reminder to your calendar.

Worked examples

Month-end dates

Months have different lengths, which trips people up. If your MOT expires on 31 March, going back a month lands on 28 or 29 February, because February has no 31st. Add a day and you reach 1 March. The calculator handles these edge cases automatically.

Why testing early is a good idea

The biggest advantage is protection against a fail. Compare the same failure on two different test dates:

There are other benefits too:

• Easier booking. Popular garages fill up quickly, especially at the end of the month.
• Time to shop around. If the fail list looks expensive, you have time to get a second quote.
• Less stress. You're not tied to one specific day.

One caution: if the test finds a dangerous defect, the car shouldn't be driven until it's repaired, even if your old certificate is still in date. Our guide to dangerous, major and minor defects explains the difference.

Can you test even earlier?

Yes. There's no rule against testing two, three or six months early. The catch is that your new certificate will run for twelve months from the date of the test, minus a day. You lose the time between the test and your old expiry date, and your renewal date moves permanently.

That can sometimes make sense:

• Moving your MOT away from a busy time, such as December, or a month when you're usually away.
• Before a long trip abroad, when your MOT would expire while you're gone.
• Lining up your MOT and service, so both happen on one garage visit each year.
• Before selling, because a car with a fresh MOT is easier to sell.

If you choose to move your date, do it once and then stick to the normal window afterwards.

First MOTs follow the same rule

A new car in Great Britain needs its first MOT by the 3rd anniversary of its first registration. You can test up to one month minus a day before that anniversary and still get a certificate that runs to the anniversary date the following year. Our guide to first MOTs has more detail, including pre-registered and imported cars.

Planning your test

A little preparation makes the most of the early window:

1. Check what was flagged last time. Advisories from your last test are a preview of possible failures. See them with our MOT advisories check.
2. Do the basic checks yourself. Bulbs, tyres and wipers cause many avoidable failures. Our pre-MOT checklist covers 20 of them.
3. Book at a garage that also does repairs if you'd like repairs done straight away, or a council-run test centre if you'd prefer one with no interest in selling repairs.
4. Know the maximum fee. Test centres can't charge more than £54.85 for a car. Our MOT cost calculator has the figures for other vehicles.

Timing tips for different situations

Company, lease and finance cars

Lease and contract hire agreements usually make you responsible for keeping the MOT current, even if the leasing company pays for servicing. Check your agreement, and book early in the window. Leasing companies often have approved garages, and their availability can be limited.

Households with more than one car

If two cars expire within a few weeks of each other, it can be worth moving one so they line up. Testing the earlier one a little more than a month early sacrifices a few weeks once, but means one garage trip each year from then on. Equally, some families prefer spreading the cost across different months.

Seasonal use

Convertibles, motorhomes and cars that are laid up over winter are best tested shortly before you start using them again. If the MOT expires while the vehicle is off the road, declare it SORN, then book a test before the season starts. You can drive it to the pre-booked test even with an expired certificate.

Approaching a holiday

If your MOT expires while you're away, test before you go. A car that fails the week before a long drive is much easier to deal with than one that fails the day you get back and need it for work.

What to take to the test

You don't need the V5C logbook or your old certificate. The tester finds everything from the registration. It does help to:

• bring the locking wheel nut key, so the tester can check the wheels if needed
• remove clutter from the boot and the footwells, so seatbelts and mounting points can be inspected
• make sure there's enough fuel and oil, as the emissions test runs the engine at high revs
• bring a phone number the garage can call if they find something during the test

Common mistakes

• Counting 30 days back instead of a calendar month. The rule is a calendar month minus a day, which isn't always 30 days.
• Using the test date instead of the expiry date. If you tested early last year, your expiry may be later than "one year after the test".
• Assuming the window extends after expiry. It doesn't. There's no MOT grace period.
• Testing on the very first day of the window without checking the date. One day too early and you lose a year's worth of alignment. Double-check with the calculator.

Summary

Test any time in the month before your expiry, starting from the day after the same date the previous month. You keep your renewal date, you get a safety net if the car fails, and you avoid the last-minute rush. Testing earlier is allowed, but your renewal date will move.