Last updated: July 2026 — figures checked against gov.uk, DVSA data and the named UK sources on 8 July 2026.
Around 27% of cars fail their MOT at the first attempt (DVSA, April–June 2026) — and most failures are cheap: lamps, tyres and suspension top the list. A fail is usually a repair bill, not a death sentence.
The maths only turns against the car when the fail list is long, structural or engine-related. Here is how to read yours.
First: understand what your fail sheet means
Your result lists defects by category, defined by the DVSA: dangerous (direct and immediate risk — fail, and you cannot drive the car away), major (affects safety or the environment — fail, but you can drive it away only if your old MOT is still valid), minor and advisory (pass, fix or monitor). Driving after a fail outside those conditions risks prosecution — the rules are on gov.uk.
The free retest window
Per gov.uk: leave the car at the test centre for repair and a retest within 10 working days is free. Take it away and bring it back within 10 working days and you pay at most a partial retest fee. Return it to the same centre by the end of the next working day for one of 33 listed simple items (bulbs, mirrors, wipers, seats and similar) and the partial retest is also free. Miss those windows and it is a full test again — up to the legal maximum of £54.85 for a car.
What actually fails — and what fixing it costs
| Failure category (DVSA, % of tests, Apr–Jun 2026) | Typical repair |
|---|---|
| Lamps, reflectors and electrics — 10.4% | Often just bulbs — among the cheapest fixes on a car |
| Suspension — 8.7% | Coil spring pair ≈ £167–£275 (Checkatrade/ClickMechanic) |
| Tyres — 6.2% | Per tyre; puncture repair averages £23 (FixMyCar) |
| Brakes — 6.1% | Front pads ≈ £105–£135 (Checkatrade); pads+discs £200–£500/axle (RAC) |
| Visibility (wipers, screen) — 4.7% | Wiper blades and washers — trivial |
Source for the failure shares: DVSA MOT testing data for class 3 and 4 vehicles, 2025-26 Q1 — the overall initial failure rate was 27.24%, and FixMyCar notes the pass rate rises after retests. In other words: the most common MOT failures are two-figure and low-three-figure repairs.
So: fix it or scrap it?
- Total the fail list honestly — quotes for everything marked dangerous or major, plus advisories you know will fail next year.
- Apply the 50–60% rule — insurers write cars off when repairs hit half to two-thirds of value (AA; RAC uses a 60% example). A £400 fail list on a £2,500 car is a routine year of motoring; a £1,400 list on the same car is a decision.
- Check the pattern, not just the bill — corrosion and structural items are the classic sign a car has reached end of life; bulbs and tyres are not.
- Know your floor — average scrap payout is £279 (CarTakeBack, June 2026), and a car with a fresh long fail list can still sell to trade above that.
Frequently asked questions
Can I drive my car home after failing the MOT?
Only if your existing MOT certificate is still in date AND nothing on the fail sheet is marked dangerous — gov.uk is explicit. With a dangerous defect or an expired certificate, the car stays put until repaired.
How long do I have for a free retest?
Free if the car stays at the test centre and is retested within 10 working days. Take it away and return within 10 working days and you pay at most a partial fee; back by the next working day for the simple listed items is free too.
What percentage of cars fail the MOT?
27.24% initially in the latest DVSA quarter (April–June 2026, class 3 and 4 vehicles). Many pass on retest after quick fixes — FixMyCar puts the pass rate around 70% and rising after retests.
Is it illegal to scrap a car that failed its MOT?
No — but it must go to an authorised treatment facility (ATF), you should receive a Certificate of Destruction, and you must tell the DVLA or risk a £1,000 fine (gov.uk).
Related guides
- Is my car worth repairing? The 60% rule
- Brake pads and discs cost guide
- Coil spring replacement cost
Sources: gov.uk MOT rules, gov.uk retest rules, DVSA MOT testing data, the RAC on common MOT fails and FixMyCar, all checked 8 July 2026. See how we verify prices.