Your MOT expiry date is fixed, but the day you take the test is up to you. Getting it done early gives you room to sort repairs and pick a slot that suits you. Go too early, though, and you can lose some of the cover you've already paid for, so the timing matters.
How early can you MOT your car and keep your renewal date?
An early MOT keeps your renewal date as long as you take it no more than 1 month minus 1 day before the current certificate runs out. The new certificate then runs for 12 months from your old expiry date, not from the day of the test. You don't lose a single day of cover.
This early-testing window is counted in calendar months. It works out at roughly 4 weeks, but the exact count shifts with the length of the month.
The quickest way to find your date is to take your expiry date, go back one calendar month and add a day.
Say your MOT runs out on 15 May. The earliest you can test and keep that date is 16 April, and if the car passes, your next MOT is due on 15 May the following year.
Earliest MOT date examples
Your earliest MOT date is one calendar month before your expiry date, plus one day. Test on or after that day and the next expiry date stays exactly where it was.
| Current MOT expires | Earliest test date that keeps it | Next expiry if it passes |
|---|---|---|
| 10 January 2027 | 11 December 2026 | 10 January 2028 |
| 20 March 2027 | 21 February 2027 | 20 March 2028 |
| 15 May 2027 | 16 April 2027 | 15 May 2028 |
| 12 August 2027 | 13 July 2027 | 12 August 2028 |
| 5 October 2027 | 6 September 2027 | 5 October 2028 |
If your MOT runs out on the 29th, 30th or 31st, confirm the exact day with your test centre before you book. Shorter months can move the start of the window by a day or two.
Can you MOT a car 2, 3 or 6 months early?
An MOT taken 2, 3 or 6 months early is allowed, but it moves your renewal date. A test before the early-testing window opens resets the certificate, which then runs for one year minus a day from the date the car passes.
Your MOT is due on 15 May, so the early-testing window opens on 16 April. If you test on 14 April instead and the car passes, your next MOT is due on 13 April the following year.
That's a month of cover you'd already paid for, gone. And every MOT after that falls a month earlier too.
But a deliberate early test can still make sense. Moving your MOT away from a month when you're often away, or lining it up with your annual service, are both fair reasons to accept a new date.
How far in advance can you book an MOT?
An MOT booking can be made as far in advance as the test centre allows, because the 1-month-minus-1-day rule applies to the test date, not the booking date. So booking in March for a June expiry is fine, as long as the test itself falls inside the early-testing window. Check how long an MOT takes when you pick a slot, so the test fits round your day.
Early booking pays off most in busy months, when slots near your expiry date can fill up. Testing near the start of the window helps too, because it leaves time to fix any of the common MOT fails before the old certificate runs out.
Not sure you'll remember? The government runs a free MOT reminder service by text or email, and you only need your registration number to sign up.
Can you drive your car if it fails an early MOT?
A failed early MOT doesn't stop you driving, as long as the old certificate is still valid and the tester found no dangerous defects. The old certificate keeps running until its own expiry date, which means you can take the car away to get the faults fixed. If you're weighing up repairs, what happens if your car fails its MOT walks through your options.
A dangerous defect is the exception, because it means the car mustn't be driven at all until it's repaired, not even to a garage. Driving it anyway can bring a fine, penalty points and a driving ban.
Major defects are different. They still fail the test, but you can drive the car to get it fixed while the old MOT lasts, provided it's roadworthy.
Get the repairs done within 10 working days and the car usually needs only a partial retest of the failed items. It's free if the car stays at the test centre for the work.
Is there a grace period after your MOT expires?
An expired MOT has no grace period, so you can't drive the car or park it on a public road after the expiry date. The only exceptions are driving to a pre-booked MOT test, or to and from a garage for repairs, and even then the car mustn't have a dangerous defect.
Driving without a valid MOT can bring a fine of up to £1,000. And it could cause problems with an insurance claim, too. That risk is the best reason to test early, because it gives you time to fix faults before the old certificate runs out.
How do you check when your MOT is due?
The GOV.UK MOT history service shows when your MOT is due, using just your registration number. It also lists past results, advisories and recorded mileage. With that record in front of you, it takes seconds to work out your MOT due date and the early-testing window that goes with it.
The paper MOT certificate isn't needed to book a test, because test centres work from the same online record. What you do need on the day is in our list of documents you need for an MOT.
When does a car need its first MOT?
A car in England, Scotland or Wales needs its first MOT by the third anniversary of its registration, so the early-testing window only matters from its second test onwards. For what the test itself involves, see the complete guide to the MOT.
Cars in Northern Ireland are first tested at 4 years old by the Driver and Vehicle Agency (DVA), which sets its own booking rules. So check its early-testing policy before you rely on the 1-month-minus-1-day window.
Buying a car on finance? Here at Carplus, we'd suggest budgeting for the MOT and any repairs alongside your monthly repayments, so the full monthly cost fits what you can afford. You can check your eligibility with a soft search, which has no impact on your credit score.
Table of Contents
