How early can you get an MOT?
You can get your MOT up to one month minus one day before your current MOT expires and keep the same renewal date for next year. If you have it done earlier than this, you can still take the test, but your future MOT expiry date will change. This is the current rule in Great Britain.
For most drivers, that one-month-minus-a-day window is the best time to book. It gives you some breathing space before the current MOT expires without shortening your normal MOT cycle.
Earliest MOT date: a worked example
The rule can sound more complicated than it actually is, so here is a real-date example.
Imagine your current MOT expires on 15 September 2026.
Your earliest MOT date without changing your usual renewal date is 16 August 2026.
If your car passes its MOT on any date from 16 August to 15 September 2026, your new MOT can retain the original renewal date and run until 15 September 2027.
This is a calendar-month calculation rather than simply counting back 30 days. The easiest way to calculate it is to go back one calendar month from your expiry date, then add one day. GOV.UK gives the same example principle: an MOT expiring on 15 May can be tested from 16 April while retaining its renewal date.
How do I find out when my MOT expires?
Before working out your earliest MOT date, you need your current expiry date.
If you do not have your MOT certificate handy, you can use the registration checker on the Windmill Garage homepage:
Enter your registration number to check your vehicle details and find when your MOT is due.
You can also check your MOT history through GOV.UK.
Once you know the exact expiry date, you can work backwards by one calendar month and then add one day to find the earliest date you can test without changing your renewal date.
What happens if I get my MOT more than a month early?
There is nothing to stop you having an MOT earlier.
The important difference is what happens to your renewal date.
If you test before the one-month-minus-a-day window and your vehicle passes, the next MOT expiry date will be one year minus one day from the date it passed. You will therefore give up some of the remaining time on your existing MOT cycle.
For example, imagine your MOT expires on 15 September 2026, but you decide to have the test on 1 August 2026.
That is too early to retain your 15 September renewal date. If the vehicle passes on 1 August, the new MOT will expire on 31 July 2027.
You have not done anything wrong. You have simply moved your annual MOT date forward.
That can occasionally be useful. Perhaps you are going away for several months, selling the car or deliberately want to move your MOT to a more convenient time of year. Otherwise, there is usually little benefit in testing that early.
Why booking your MOT early can be useful
You do not have to wait until the last few days before your MOT expires. In fact, using the permitted early window can make life considerably easier.
Booking early gives you more choice over appointment dates and means you are less likely to find yourself trying to arrange an MOT at the last minute.
It can also give you time to deal with repairs if the MOT uncovers a problem.
For example, if your MOT expires on 30 September, waiting until 30 September itself leaves very little room to sort things out if the vehicle fails. Having the test earlier in the permitted window gives you more time before the existing certificate reaches its expiry date.
There is an important safety point here, though. If your vehicle fails an early MOT, you can only take it away if the existing MOT is still valid and no dangerous defects were found. The vehicle must also remain roadworthy. A current MOT certificate does not make an unsafe car legal to drive.
What if my MOT has already expired?
Once your MOT has expired, you cannot normally drive or park the vehicle on a public road.
There are limited exceptions, including driving to a pre-arranged MOT test or to or from somewhere for repairs. The vehicle still needs to be roadworthy.
Driving without a valid MOT when one is required can result in a fine of up to £1,000.
So if you realise your MOT has already expired, do not simply carry on driving until you get around to booking it. Arrange the test first.
At Windmill Garage in Horndean, you can book online 24 hours a day:
When is the first MOT due?
For most cars in Great Britain, the first MOT is due by the third anniversary of the vehicle’s registration. After that, an MOT is normally required every year. Some types of vehicle have different requirements.
There are also exemptions for some historic vehicles. Vehicles built or first registered more than 40 years ago may not need an MOT if no substantial changes have been made, although they must still be kept in a roadworthy condition.
If you are unsure, check your vehicle’s actual MOT status rather than relying on its age alone.
Should I book my MOT on the earliest possible date?
You do not have to. The earliest date is simply the start of the window in which you can have your MOT while retaining your existing renewal date.
For example, if your MOT expires on 20 November, you could book it for 21 October, 1 November, 10 November or any other suitable date before it expires.
The advantage of booking towards the beginning of the window is that you have more time if something needs attention.
It also means your MOT is dealt with well before the deadline without sacrificing the remaining validity of your existing MOT cycle.
If you know your MOT expiry date, you can book a suitable appointment with Windmill Garage at:
Our online booking system is available 24/7, so you can see available appointments without needing to call during opening hours.
MOT testing in Horndean
Windmill Garage is a family-run garage at 249 London Road, Horndean, Waterlooville, Hampshire PO8 0HW. We have been looking after local cars for more than 35 years.
We carry out MOTs, servicing, diagnostics and repairs, and our MOTs include a free re-test if your vehicle fails its first test.
You can see our current published prices here:
If you have a question about when to book your MOT, contact us here:
Or call 02392 571003. We are open Monday to Friday, 8.30am–5pm, and closed at weekends.
Frequently asked questions
How early can I do my MOT?
You can have your MOT up to one month minus one day before its current expiry date and retain the same renewal date. For example, if it expires on 15 September, you can test from 16 August.
What happens if I test more than a month early?
You can still have the MOT, but you will not retain your existing renewal date. If the vehicle passes, the new MOT will expire one year minus one day from the date it passed.
Can I drive after my MOT expires?
Generally, no. You cannot drive or park a vehicle on a public road after its MOT has expired. Limited exceptions include driving to a pre-arranged MOT test or to or from somewhere for repairs. Your vehicle must still be roadworthy.
How do I calculate my earliest MOT date?
Take your current MOT expiry date, go back one calendar month, then add one day. For example, an expiry date of 25 October gives you an earliest test date of 26 September if you want to keep the same renewal date.
[FEATURE FOR CHRIS: earliest-date calculator — user enters expiry date, it shows the earliest test date]
What happens if my car fails an early MOT?
If your existing MOT is still valid and the new test does not identify any dangerous defects, you may be able to take the vehicle away. It must still meet minimum roadworthiness standards. If a dangerous defect is recorded, you must not drive it until the problem has been repaired.
Book your MOT or service in under a minute
Book early enough to give yourself breathing space while keeping your existing MOT renewal date.
Book online any time at https://www.windmillgarage.co.uk/book-in-your-car/ or call us on 02392 571003 (Mon–Fri, 8.30am–5pm).