MOT rules and original analysis
How early can you MOT a car?
Up to a month, minus a day, before your MOT runs out, and you keep the same renewal date. Go earlier and the date moves. Here’s the rule in full, then what 58.3 million MOT tests from 2024 and 2025 say about when to book.
Not sure when yours runs out? Enter the registration for the date DVSA holds.
The rule
GOV.UK: you can get an MOT up to a month (minus a day) before the current one runs out and keep the same renewal date. You can test earlier than that, but then the next MOT runs out a year, minus a day, from the day the car passes.
| Your MOT runs out on 15 May. You test on… | Your next MOT runs out on |
|---|---|
| 16 April to 15 May | 15 May next year: you keep your date |
| 14 April (GOV.UK’s example) | 13 April next year: you lose a month |
| After 15 May | A year, minus a day, from the pass. You can’t drive it in the meantime except to a pre-booked test or repairs |
Driving without a valid MOT can bring a fine of up to £1,000, and you can’t renew the vehicle tax until it passes. The MOT due date check gives the exact expiry for any registration.
When drivers actually go
We followed every car that passed an MOT in the first half of 2024 to its next test, 8,995,936 of them. 48.3% came back in the month before the anniversary, inside GOV.UK’s window. 7.6% came back more than a month after it, which means the MOT had certainly run out. The later the test, the higher the fail rate:
| Next test, against the last pass | Cars | Share | Fail rate |
|---|---|---|---|
| One to two months early | 183,615 | 2.0% | 18.1% |
| Within the month before | 4,341,323 | 48.3% | 19.7% |
| Up to a month after | 3,325,222 | 37.0% | 20.7% |
| More than a month late | 679,876 | 7.6% | 23.8% |
Late testers are older cars on average, so we checked within age bands: in every age band, cars tested more than a month late failed more than cars tested in the month before.
| Car’s age | Month before | Month after | Over a month late |
|---|---|---|---|
| 3 to 6 years | 12.3% | 13.0% | 15.2% |
| 7 to 10 years | 20.0% | 20.4% | 23.6% |
| 11 to 15 years | 27.6% | 27.8% | 30.1% |
| 16 years and over | 28.7% | 28.3% | 29.1% |
What this doesn’t show is that testing late causes fails. A driver who lets the MOT lapse may also put off repairs, and we can’t see that. The practical reading: book for the month before, and a car that’s been left late is more likely to need work.
Does the month matter?
For passing, hardly. Test volumes follow the months cars were first registered, so some months carry far more cars of one age than others, and the raw fail rate swings with them. Compare cars of the same age and the fail rate moves by under 3 points across the year. April was the highest month and December the lowest in both 2024 and 2025, but the gap is small next to a car’s age or condition.
What changes is how busy it is. September and March were the busiest months in 2025, with 3,181,319 and 3,111,730 tests, following the March and September number-plate changes. If your MOT is due then, book as soon as the window opens.
| Month | Tests, 2025 | Fail rate, 2024 | Fail rate, 2025 |
|---|---|---|---|
| January | 2,908,512 | 24.6% | 23.2% |
| February | 2,059,422 | 24.1% | 23.7% |
| March | 3,111,730 | 23.2% | 22.9% |
| April | 2,328,226 | 24.8% | 23.9% |
| May | 2,209,986 | 23.7% | 22.9% |
| June | 2,178,220 | 23.3% | 22.8% |
| July | 2,578,807 | 23.9% | 23.1% |
| August | 2,287,980 | 23.3% | 22.6% |
| September | 3,181,319 | 22.7% | 22.2% |
| October | 2,936,225 | 23.2% | 22.8% |
| November | 2,502,318 | 23.2% | 22.5% |
| December | 1,895,413 | 22.4% | 22.1% |
Fail rates are standardised to each year’s age mix, so every month is compared on the same spread of car ages.
Does the day matter?
Here the data shows a clear gap. Saturday tests failed 16.4% of the time in 2025, against 23.4% on weekdays, comparing cars of the same age, and 2024 was the same (17.1% on Saturdays). Saturdays carry 6.5% of all tests. Within the week the rate drifts down from Monday to Friday.
The data doesn’t say why. Our guess, which we can’t test: weekday MOTs are often booked with a service at the same garage, where the tester records the faults before fixing them, while Saturday tests come more from owners who’ve checked the car first. So the useful step is getting the car ready before the test, whichever day it’s booked.
| Day | Tests, 2025 | Fail rate, 2024 | Fail rate, 2025 |
|---|---|---|---|
| Monday | 5,686,807 | 24.7% | 24.0% |
| Tuesday | 5,948,472 | 24.4% | 23.8% |
| Wednesday | 5,640,563 | 24.2% | 23.5% |
| Thursday | 5,557,561 | 23.8% | 23.3% |
| Friday | 5,308,349 | 22.8% | 22.2% |
| Saturday | 1,968,599 | 17.1% | 16.4% |
| Sunday | 67,807 | 14.6% | 13.7% |
Sunday is a very small sample: few test stations open.
Before you book
The pre-MOT checklist covers what you can check on the driveway. Across MOTs of every age, suspension, lights, brakes and tyres are where most fails sit. For a car’s first MOT, see which new cars fail it.
How this was worked out
From DVSA’s anonymised MOT test results for 2024 and 2025, published under the Open Government Licence and retrieved 11 Oct 2026: class 4 normal tests (cars and light vans) on vehicles 3 or more years old, 28,091,552 in 2024 and 30,178,158 in 2025. A fail is a first-attempt fail. Monthly and daily rates are standardised to each year’s age mix, single year by single year.
For the timing, every passing test from January to June 2024 was matched to that vehicle’s next normal test, so a car up to six months late still shows up in 2025. 12.5% had no later test by the end of 2025: scrapped, exported, off the road, or later still. Next tests within 300 days of the pass (5.2%) are left out of the table: they’re mostly taxis on six-monthly council checks rather than annual MOTs. “More than a month late” means over 396 days after the pass. That’s past any expiry the earlier pass could have set, so those MOTs had certainly run out. Some of the “month after” group were still in date, because the pass before was itself taken early.
The MOT rules are from GOV.UK’s Getting an MOT, read 11 Oct 2026. Page last reviewed 11 Oct 2026.
Questions
How early can you MOT a car?
Up to a month, minus a day, before the current MOT runs out, and the new certificate keeps the same renewal date. GOV.UK's example: if the MOT runs out on 15 May, the earliest test that keeps the date is on 16 April.
Can I MOT my car 3 months early?
Yes, you can take an MOT at any time. But anything earlier than a month (minus a day) before the expiry moves your renewal date: the new MOT runs out a year, minus a day, from the day the car passes. Testing 3 months early gives up those 3 months.
What happens if my MOT runs out?
You can't drive the car except to a pre-booked MOT or to a garage for repairs, you can be fined up to £1,000, and you can't renew the vehicle tax. Insurance is usually invalid too.
Is there a best time of year for an MOT?
For passing, the month makes little difference: once you compare cars of the same age, the fail rate moves by under 3 points across the whole year. What changes is demand: September and March were the busiest months in 2025, following the March and September plate changes, so book early in those months.
Are Saturday MOTs less likely to fail?
In DVSA's data they fail less: 16.4% of Saturday tests in 2025 against 23.4% on weekdays, comparing cars of the same age, and 2024 shows the same. The data doesn't say why, so it isn't a reason on its own to move a booking.
How many people MOT their car late?
Of the cars that passed in the first half of 2024 and came back for another MOT, 7.6% came back more than a month after the anniversary of that pass, so their MOT had run out. Those late tests failed 23.8% of the time, against 19.7% for cars tested in the month before.