When is my MOT due?

The three year rule, and what starts the clock

The requirement comes from section 47 of the Road Traffic Act 1988, which makes it an offence to use a vehicle on a road when no test certificate has been issued within the appropriate period. The section bites on a vehicle first registered not less than three years before the moment it is used. GOV.UK puts the same rule in plainer words: you must get an MOT by either the third anniversary of the vehicle's registration, or the anniversary of its last MOT if it is already over three years old.

The date that counts is the date of first registration, which is printed on the V5C log book. It is not the day you bought the car, not the model year in the advert, and not the date on the dealer's invoice. A car first registered on 14 September 2023 does not need a certificate on 13 September 2026 and does need one on 14 September 2026. Cars registered late in a plate cycle catch people out here, because a car sold as a 2024 model can carry a registration date from the previous December.

After the first test the anniversary belongs to the certificate, not the registration. A certificate issued on 2 August runs to 1 August the following year, and from then on the expiry date is the only date that matters. That is why a five year old car bought in spring can have an MOT falling due in November: at some point in its life it was tested outside the original window and the anniversary moved.

• V5C, date of first registration: the only date that decides when the first test is due.
• Current certificate, expiry date: the date that decides every test after the first one.
• MOT history service: where to look when you have neither document in front of you.

Finding the exact date without guessing

DVSA's MOT history service answers the question from the number plate alone. It shows whether the vehicle passed or failed each test, the mileage recorded at the time, and for tests in England, Scotland and Wales it also shows where the test was done and what failed or was noted as a minor problem. Records go back to 2005 for cars, vans and motorcycles, to 2018 for lorries, trailers, buses and coaches, and to 2017 for Northern Ireland. Adding the 11 digit number from the V5C brings up the extra detail on the same record.

If the service returns no test history at all for a car that is nearly three years old, nothing is wrong. There is simply nothing to show yet, because the car has never needed a test. The same blank result on a ten year old car is a different matter, and it usually means the plate has been typed in wrongly or the vehicle has spent years off the road.

DVSA will also tell you before the date arrives. The free reminder service sends a text message or email one month before a car, van or motorcycle MOT is due, and two months before a lorry, bus or large trailer test. It is not available to Northern Ireland residents, who get a reminder by post instead. One reminder a year is a cheap insurance policy against a lapse you did not notice.

Testing early: the month minus a day window

You can have the test done up to a month minus a day before the current certificate runs out and keep the same renewal date. GOV.UK gives the example of a certificate expiring on 15 May: the earliest you can test and still keep 15 May as your renewal date is 16 April. Test inside that window and the new certificate is dated to expire on the same day of the following year, so you lose nothing.

Go earlier than the window and the new certificate runs twelve months from the day of the test instead. Book a test on 1 March when the current certificate has until 15 May and the new expiry becomes 1 March the following year. You have paid the same fee and thrown away 75 days of cover you already held, and you have moved your anniversary forward permanently, because next year's window is now measured from the new date.

The same window applies to the first test. A car approaching its third anniversary can be tested in the month before it and keep the anniversary as its renewal date. There is one reason to test earlier on purpose, which is to find out what a car needs before a deadline you cannot move, for example if you are about to sell it or you are going away. That is a deliberate trade, and it is worth making knowingly rather than by accident.

The vehicles tested from one year old

Section 47 sets a shorter period for vehicles that carry the public. Anything adapted to carry more than eight passengers, a licensed taxi and an ambulance are all tested from one year old rather than three. DVSA's fee table is the easiest place to see which class a vehicle falls into, because the first test age sits in the same row as the maximum fee.

This catches private owners more often than you would expect. A converted minibus with nine seats still fitted, a former ambulance bought at auction and a private hire car that has kept its licensing history are all tested annually from year one. If you have bought something unusual, check which class it tests in before assuming a three year old vehicle is inside its first window.

• Ambulances and taxis: class 4, first test at one year, maximum fee £54.85.
• Private passenger vehicles and ambulances with 9 to 12 passenger seats: class 4, first test at one year, maximum fee £57.30.
• Private passenger vehicles and ambulances with 13 to 16 passenger seats: class 5, first test at one year, maximum fee £59.55.
• Private passenger vehicles and ambulances with more than 16 passenger seats, and playbuses: class 5, first test at one year, maximum fee £80.65.

Northern Ireland, and cars over 40 years old

Northern Ireland runs its own scheme through the DVA, and the first test comes later. Cars and motorcycles there are tested from four years old and then annually. The MOT history service does carry Northern Ireland results, but only back to 2017, so a longer paper trail on an older car will be thinner than the equivalent car from Great Britain.

At the other end of the age range the test stops being compulsory. A vehicle built or first registered more than 40 years ago is exempt from the MOT as long as no substantial changes have been made to it in the last 30 years, and GOV.UK gives replacing the chassis, body, axles or engine to change the way the vehicle works as its examples of a substantial change. No application is needed to stop testing it. The obligation to keep the vehicle roadworthy does not go anywhere, and neither does the offence of using a vehicle in a dangerous condition, so plenty of owners keep testing voluntarily for the evidence it leaves behind.

If the date has already passed

There is no grace period. From the day after expiry the vehicle cannot be used or parked on a public road, and the fine for driving without a valid certificate runs up to £1,000. Two narrow exceptions exist, and they are the subject of a separate guide: driving to a test you have already booked, and driving to or from a place where the vehicle is being repaired.

A lapsed certificate also blocks the tax. You cannot tax a vehicle that needs an MOT and does not have one, and the MOT record can take up to two days to update after a pass, so a same day plan of test in the morning and tax in the afternoon does not always work. If the certificate has expired and the tax is about to, book the test first and leave yourself a working day of slack.