An MOT is valid for one year from the date of the test. Once it expires it's illegal to drive the car on public roads - there is no grace period. You can renew up to a month (minus a day) early and keep your existing renewal date, so most drivers never lose time. You can check any car's MOT expiry date free in seconds on RegScan, using official DVSA data.

This guide covers everything around MOT validity: how long it lasts, the grace-period myth, when your MOT runs out and how to find the date, the early-renewal window, driving on the expiry day, when a new car needs its first test, and what happens if you let it lapse.

How long is an MOT valid for?

An MOT certificate lasts 12 months. The expiry date is exactly one year on from the test date - unless you used the early-renewal window (more on that below), in which case it runs to the anniversary of your previous expiry, not the test.

The MOT confirms the car met minimum safety and emissions standards on the day of the test. It doesn't guarantee the car stays roadworthy all year - that's the driver's ongoing responsibility - but legally the certificate is good for those 12 months.

Is there an MOT grace period?

No. This is the single biggest MOT myth. There is no grace period after your MOT expires - not a day, not a week. The moment the certificate lapses, driving the car on a public road is illegal (except to a pre-booked test or for repairs).

The confusion comes from the early-renewal window at the other end - you can test the car up to a month before expiry - and from the separate rule that lets you drive an expired-MOT car to a booked test. Neither of those is a grace period for normal driving after expiry.

When does my MOT run out, and how to check

Your MOT runs out on the expiry date printed on your last MOT certificate - 12 months after that test (or your kept renewal date). If you don't have the certificate to hand, you don't need it:

  • Enter your registration on RegScan to see the exact MOT expiry date, current status, and the full test history - free, no sign-up.
  • Or use the GOV.UK MOT history service, which shows the same official DVSA record.

Checking takes seconds and is the reliable way to know exactly when the MOT runs out, rather than relying on memory.

The one-month early renewal window

You can have the MOT done up to one month (minus a day) before it expires and keep the same renewal date. For example, if your MOT expires on 15 September, you can test any time from 16 August onwards and the new certificate still runs to 15 September next year - you don't lose the days.

Test more than a month early and the new expiry is set 12 months from the test date instead, so you'd lose part of your existing cover. The sweet spot is within that final month.

Can I drive on the MOT expiry date?

Yes - the MOT is valid up to and including the expiry date shown. So if it expires on 15 September, you can legally drive on the 15th; it's the 16th when you're driving illegally. That said, cutting it that fine is risky - if the car then fails a re-test you could be stuck, so it's better to renew within the early window.

When does a car need its first MOT?

A new car needs its first MOT when it's three years old (from first registration), then every 12 months after that. A few vehicle types differ - for example some are tested from one year - but for ordinary cars and vans it's three years, then annual. If you've bought a nearly-new car, it's worth noting the registration date so you know exactly when that first test falls due, rather than assuming it's already been done.

How often does a car need an MOT?

After the first test, an ordinary car or van needs an MOT every 12 months for the rest of its life - there's no point at which annual testing stops (unless the car becomes MOT-exempt as a 40-year-old historic vehicle). So the pattern for a typical car is: no MOT for the first three years, then one every year, each certificate valid for 12 months.

Some vehicle types are tested on a different schedule. Taxis, ambulances and vehicles with more than eight passenger seats, for example, are tested from one year old rather than three, and some are tested more frequently. Larger goods vehicles and buses follow their own annual testing regime entirely. For the everyday car, van or motorbike most people drive, though, the rule is simply first test at three years, then once a year after that.

Because the clock resets to the test date (or your kept renewal date) each year, the simplest way to stay on top of it is to note the expiry and check it whenever you're unsure. A quick registration lookup on RegScan shows the current expiry date and the full history in one place, so you always know how long is left to run.

What happens if your MOT expires?

Driving without a valid MOT carries a fine of up to £1,000, rising to £2,500 and 3 penalty points if the car has a dangerous defect. It can also invalidate your insurance, and police ANPR cameras automatically flag vehicles with no valid MOT.

There's a knock-on with tax, too: you generally need a valid MOT to tax the vehicle, so an expired MOT can leave you unable to renew tax - meaning the car can't legally stay on a public road and would need to be declared SORN and kept off-road.

The only journeys allowed on an expired MOT are to a pre-booked test, or to a garage for repairs to pass it - and the car must still be taxed, insured and roadworthy.

Does a valid MOT mean the car is safe all year?

No - and this catches people out. An MOT is a snapshot on the day of the test. It confirms the car met the minimum standards at that moment; it does not certify the car will stay roadworthy for the whole 12 months. Tyres wear, bulbs blow and brakes fade between tests, and keeping the car roadworthy is the driver's legal responsibility throughout the year - not just at MOT time. A valid certificate is a legal requirement, not a guarantee of ongoing condition.

Which vehicles are exempt from an MOT?

A few vehicles don't need an annual MOT at all. The main one drivers ask about is historic vehicles: cars over 40 years old are generally MOT-exempt, provided they haven't been substantially modified. Exempt doesn't mean unregulated, though - the vehicle must still be roadworthy, and you formally declare the exemption when you tax it. If you're unsure whether a car qualifies, its record on RegScan shows the date of first registration to work from.

MOT validity when buying a used car

Buying used? Don't assume the MOT has long to run. Check the expiry date before you agree a price, because a car that needs an MOT within weeks may also need work to pass it. Just as usefully, the full MOT history shows how the car has fared year on year - mileage, past failures, and advisories that keep recurring. A repeating advisory is often the very thing about to become a failure, so it's worth factoring into the price. Enter the registration on RegScan to see the expiry date and the complete history free.

How MOT and tax are linked

MOT and vehicle tax are separate, but connected. You generally need a valid MOT to tax the car. So if the MOT lapses you can hit a chain reaction: no MOT means you can't renew tax, which means the car can't legally stay on a public road, which means it must be declared SORN and kept off-road until it's tested and taxed again. Keeping the MOT current keeps the whole thing simple - and you can see MOT and tax status together on one page with RegScan.

Is MOT validity different in Northern Ireland?

The one-year validity is the same, but in Northern Ireland MOTs are run by the DVA (Driver and Vehicle Agency) at government test centres, rather than the DVSA-approved garages used in Great Britain. The rules on expiry, the early-renewal window and driving to a booked test work in much the same way; the main practical difference is that NI test slots can need booking well in advance.

How to avoid missing your MOT

A few habits keep you covered:

  • Know the date - check your MOT expiry on RegScan so it's never a guess.
  • Sign up for the free GOV.UK MOT reminder, which emails or texts you before it's due.
  • Renew within the last month - you keep your date and build in time for any repairs.
  • Watch recurring advisories - if the same advisory keeps appearing on your history, it's likely to become a failure, so fix it before the test. RegScan flags these automatically.

The bottom line

An MOT is valid for exactly one year, there's no grace period once it expires, and you can renew in the final month without losing your date. Get it done within that window, keep an eye on recurring advisories, and you'll never be caught driving illegally or scrambling for a last-minute test slot. When in doubt about the date, don't guess - enter the registration on RegScan to see the exact expiry, the current status and the full MOT history free, straight from official DVSA data.

Frequently Asked Questions

How long does an MOT last?

An MOT lasts one year (12 months) from the test date, or to your kept renewal date if you tested within the early-renewal window.

Is there a grace period after an MOT expires?

No. There is no grace period. Once your MOT expires it's illegal to drive on public roads, except to a pre-booked test or a garage for repairs.

How do I check when my MOT runs out?

Enter your registration on RegScan (or GOV.UK) to see the exact MOT expiry date and status free, from official DVSA data.

Can I get my MOT done early without losing time?

Yes. Test up to one month (minus a day) before expiry and the new certificate keeps your existing renewal date. Test earlier than that and you lose the extra days.

Can I drive on the day my MOT expires?

Yes - the MOT is valid up to and including the expiry date. Driving becomes illegal the day after.

When does a new car need its first MOT?

Most cars need their first MOT at three years old, then every year after that.

What happens if I drive with an expired MOT?

A fine of up to £1,000 (up to £2,500 and 3 points with a dangerous defect), possible invalid insurance, and automatic detection by ANPR cameras.

Which cars don't need an MOT?

Historic vehicles over 40 years old are generally MOT-exempt, as long as they haven't been substantially modified. They must still be kept roadworthy, and you declare the exemption when you tax the car.

Does a valid MOT mean my car is safe for the whole year?

No. An MOT only confirms the car met the standards on the test day. Keeping it roadworthy for the rest of the year - tyres, brakes, lights - is the driver's responsibility.

Do I need a valid MOT to tax my car?

Yes, in most cases. If the MOT has expired you generally can't renew the tax, so the car can't stay on a public road and would need to be declared SORN until it's tested and taxed again.