Failing an MOT is annoying, but it is not the end of the road. Every car service that fails gets a second chance through an MOT retest. The tricky part is knowing whether that retest is free, whether you owe a partial fee, or whether you are back to square one with a full test and a full bill.
Let's break it down so you know exactly where you stand.
An MOT retest checks whether the faults listed on your failure certificate have been fixed. It is not a brand-new MOT from scratch. The tester only looks at the specific items that caused the failure, along with anything he or she needs to check to confirm the car is safe.
The rules around cost and timing depend on two things: where you get the repairs done and how quickly you bring the car back for testing. Get these details right, and you could pay nothing at all. Get the timing wrong, and you may end up paying for a completely new test.
This is the question most drivers search for, so here is the short answer.
Free retest: You leave the car at the same test centre for repairs, and it goes back in before the end of the next working day, or within 10 working days for certain items. No fee is charged.
Partial retest fee: You take the car away for repairs and bring it back to the same centre within 10 working days. A reduced fee may apply, capped at half the price of a full test.
Full retest fee: You wait longer than 10 working days, or you go to a different test centre. In this case, the garage treats it as a brand new MOT and charges the full price.
According to GOV.UK, you will not have to pay again if you take your vehicle back to the same test centre before the end of the next working day for a partial retest on a defined list of items. You will only need a partial retest, which may carry a fee, if you take the vehicle away and bring it back within 10 working days of the original failure.
A free retest depends on two conditions working together: where the car sits while it gets fixed and which parts failed.
You get a free retest if:
You leave the car at the same MOT test centre for the repairs.
The retest happens within 10 working days of the original failure.
GOV.UK confirms that you only need a partial retest if you leave the vehicle at the test centre for repair and it gets retested within 10 working days, and there is no fee for this.
There is also a faster route to a free retest if you take the car away. If you drive it to your own mechanic, get the fault fixed, and return it to the same test centre before the end of the next working day, the tester will not charge you again. This only applies to a defined list of failure items, including things like:
Doors, bonnet, and boot lid
Mirrors and windscreen wipers or washers
Horns and lamps
Seat belts (not the anchorage points)
Registration plates
Wheels and tyres
Vehicle identification number (VIN)
This list covers items that a tester can check quickly without a full re-examination of the vehicle. Brake faults, suspension issues, or emissions problems will not qualify for this next-day free check. They need the 10 working-day partial retest route instead.
A partial retest is not the same thing as a free retest, even though the two often get mixed up. A partial retest simply means the tester only checks the items that failed rather than running through the entire MOT checklist again. Whether you pay for it comes down to timing and location.
If the same garage that tested your car also repairs it, and you get it back within 10 working days, that counts as a partial retest with no charge. This is usually the cheapest and simplest option, since the garage already has your failure report on file.
If you prefer to use your own mechanic, or the test centre does not offer repairs, you can take the car away. Bring it back to the same test centre within 10 working days, and you still only need a partial retest, though the garage can charge a fee for it. Go past that 10-day window, or switch to a different test centre, and the garage has to treat it as a full MOT. That means the full checklist and the full fee.
Here is the timeline in plain terms:
Next working day: Free retest on a specific list of minor items, whether the car stayed at the centre or was taken away for repair.
Within 10 working days: Partial retest on the original failed items. Free if the car stayed at the test centre. A capped fee if you took it away.
After 10 working days: A full retest is required. The full MOT fee applies.
Working days do not include weekends or bank holidays, so plan around that if you fail to land on a Friday. If your car is off the road for parts or a busy garage schedule, keep an eye on the calendar. Missing the 10-day mark by even one day pushes you back to a full test.
There is a maximum amount MOT test stations can charge, and this depends on the type of vehicle. The maximum fee for a car is £54.85, and it is £29.65 for a standard motorcycle. This figure sets the ceiling for a partial retest fee too. A partial retest fee cannot legally exceed half of that full test price, so garages typically charge somewhere between nothing and around £27 for a partial check, depending on the centre and how much work the retest actually involves.
Prices vary between garages, since this is a maximum rather than a fixed rate. It pays to ask the garage what they charge for a retest before you book the original MOT, so there are no surprises if your car does not pass the first time.
Yes, in most cases, but there is one condition that matters more than any other: whether your car failed with a dangerous fault. If the failure report lists a dangerous defect, your vehicle cannot legally be driven, even with a valid MOT certificate still showing. You will need to arrange a tow or a recovery service to get it to a repair garage.
If the failure only lists major or minor faults, and your existing MOT certificate has not expired yet, you can drive the car to a different garage for repairs. Once fixed, bring it back to a test centre within the timeframes above to keep your retest options open.
It does happen, particularly if a repair was not quite finished or a different fault turns up during the recheck. The process simply repeats. You get another failure report, another chance to fix the issue, and the same free, partial, or full retest rules apply based on timing and location.
If the same problem keeps failing the retest, it is worth asking the garage directly what is going on before you pay for a third attempt. A good mechanic should be able to explain exactly what still needs fixing.
Read the failure report carefully and note whether any fault is marked "dangerous".
Decide whether to repair at the same test centre or take the car elsewhere.
Book the repair as soon as possible to protect the free retest window.
Return the car within the next working day for eligible minor items, or within 10 working days for a partial retest.
Keep your paperwork, including the failure certificate, in case a dispute comes up later.
If you would rather skip the phone calls and paperwork, a platform like Drivlu lets you compare local garages, check pricing before you commit, and book both the repair and the retest in one place. It will not fix the timing rules for you, but it does make it easier to find a garage that can turn the work around inside that 10-working-day window.
Whether your car passed with no issues or needs a retest after repairs, keeping track of test centres and pricing across different garages takes time. Drivlu connects drivers with vetted local garages for MOT tests, retests, and the repair work in between, with upfront pricing so you know what to expect before you book.
Do you pay for an MOT retest?
It depends on timing and location. Leave your car at the same test centre and return within 10 working days, and it is free. Take it away and bring it back within 10 working days, and a capped partial fee may apply. After that, you pay for a full test.
How long do I have for a free MOT retest?
For a specific list of minor items, you have until the end of the next working day. For other failed items, you have 10 working days if the car stays at the same test centre; otherwise, a partial fee may apply within that same window.
What is a partial MOT retest?
A partial retest only checks the items that caused your original failure, rather than running the full MOT checklist again. It applies when you return to the same test centre within 10 working days of the initial failure.
Can I take my car to a different garage after an MOT fail?
Yes, as long as no dangerous fault was recorded and your existing MOT certificate is still valid. If a dangerous fault is found, the car cannot be driven and needs recovery to a repair garage instead.
What happens if I miss the 10 working-day retest window?
The test centre has to treat the retest as a brand new MOT. That means the full checklist gets tested again, and you pay the full MOT fee rather than a reduced partial retest charge.
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