Failed the MOT? Retest Rules, the Free Window & Driving After a Fail (UK)

Quick answer: Fail the MOT and your retest can be free: leave the car at the test centre for repair and it’s a free partial retest within 10 working days; take it away and return by the end of the next working day and it’s free for a specific list of items; return within 10 working days and it’s a partial retest that can carry a reduced fee. As for driving home: a dangerous defect means the car doesn’t move; a major-only fail with your old MOT still valid can legally be driven — but only while the car is actually roadworthy.

The three retest situations

• Car stays at the test centre: repaired and partially retested within 10 working days — free.
• You take it away, back by end of next working day: free partial retest, but only for the listed quick items (wipers, mirrors, seatbelts, lamps and similar).
• You take it away, back within 10 working days: partial retest — the station may charge up to half the full fee.
• Beyond 10 working days: full test, full fee.

Can you drive after failing?

• Dangerous defect: no. Driving it is an offence regardless of whether the old certificate is still in date.
• Major defects, old MOT still valid: the MOT position allows driving until the old certificate expires — but the Road Traffic Act still requires the car to be roadworthy, so a car with a failed braking component is not defensible.
• Old MOT expired: you may only drive to a pre-booked test appointment or to/from repair.

Disagree with the result?

You can appeal a fail to DVSA (there’s a formal complaint route with a time limit) — don’t repair the disputed item before the appeal or the evidence goes with it.

FAQs

Does a fail cancel my existing MOT?
No — a certificate runs to its expiry date. But the failed defects are on the public record, and driving an unroadworthy car is an offence regardless of certificate dates.

Is the retest at a different garage free?
No — the free/reduced windows only apply at the original test centre.

🔍 Free tool: see any car’s full MOT history — every test, every mileage, clocking flags included — with our MOT history checker.

Related guides

• Free MOT history checker (with mileage timeline)
• The V5C decoded
• Buying a used car: the 7 documents to check

Sources

gov.ukMOT retestsgov.ukIf your vehicle fails the MOT