When can I get my MOT done?
Up to a month (minus a day) before it runs out, and if you test inside that window you keep the same renewal date — so nothing is lost by going early. Test before that window and the new expiry becomes one year minus a day from the day it passed, which quietly costs you the time you were ahead. In Great Britain a car needs its first MOT by the 3rd anniversary of registration (Northern Ireland differs: first test at four years), and driving without a valid one risks a fine of up to £1,000.
The rule worth remembering. Within a month (minus a day) of the expiry date, an early test is free of charge in the sense that matters: the anniversary does not move. Outside it, the clock resets to the day you passed. People who book “whenever it is convenient” a few months early are giving away weeks of certificate every time.
Working out your own date
- Find the current expiry date. It is on the last MOT certificate, and GOV.UK’s free MOT history service shows it from the registration.
- Count back a month (minus a day) from that expiry. That is the earliest you can test and keep the date. If you know the date of the last MOT, our MOT due date checker does the counting for you.
- Book inside that window, not before it, and leave room for a retest if something fails.
If it has already expired
You cannot drive or park on the road on an expired MOT. GOV.UK gives two exceptions: driving it to a pre-arranged MOT test, or to or from somewhere to be repaired. The fine reaches £1,000, and an expired certificate can affect insurance, which is usually the costlier consequence of the two.
Buying a car? The MOT date comes with it
The certificate belongs to the vehicle, not the keeper, so the expiry does not reset when you buy — see whether the MOT transfers when you buy a used car. Before you commit, the history is worth more than the date: advisories on the last test are the best available guide to what the next one will find, and an advisory is not a failure.
For how likely the next test is to pass at all, given the car’s age and mileage, see the odds a used car passes its next MOT.
Where this comes from
GOV.UK, getting an MOT, read 2026-09-21. Read the original. These are the rules for Great Britain; testing in Northern Ireland is run by the DVA on its own schedule, and nidirect states no “test a month early” rule there: see the MOT checker for Northern Ireland. General guidance, not advice on a particular vehicle.
Frequently asked
How early can I get an MOT without losing the renewal date?
Up to a month (minus a day) before the current certificate expires. Test within that window and the new expiry stays on the same anniversary, so an early test costs you nothing. It is the single most useful thing to know about MOT timing and the one most often got wrong.
What happens if I test more than a month early?
The renewal date moves. The new certificate runs one year minus a day from the date the vehicle last passed, rather than from the old expiry, so you give up the time you were ahead. Over several years of testing early, the anniversary can drift a long way from where it started.
Can I drive my car if the MOT has expired?
GOV.UK gives two exceptions: to a pre-arranged MOT test, or to or from somewhere to be repaired. Otherwise you cannot drive or park it on the road, and the fine can reach £1,000. Note that insurance can also be affected, which is usually the more expensive problem.
When is the first MOT due on a new car?
In Great Britain, by the 3rd anniversary of registration for most cars. A few vehicle types are tested from one year old instead, so check the class if the vehicle is not an ordinary car.
Does a failed test end my existing certificate?
If the existing certificate is still valid and the car did not fail on a dangerous defect, it generally remains valid until its expiry date. A dangerous defect means the car must not be driven away. This is one to confirm at the test station for the specific result rather than assume.
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