Driving on an illegal tyre is not a minor matter in the eyes of the law. The penalty is up to a £2,500 fine and 3 penalty points, and the detail that surprises most drivers is that this applies per tyre, not per car.
Per tyre, not per car
Because the penalty is counted for each illegal tyre, the numbers escalate fast:
| Illegal tyres | Maximum fine | Penalty points |
|---|---|---|
| 1 | £2,500 | 3 |
| 2 | £5,000 | 6 |
| 4 | £10,000 | 12 |
Four bald tyres, in other words, can mean up to £10,000 and 12 penalty points in one go.
Losing a licence
The points matter as much as the fines. Reaching 12 penalty points within three years triggers disqualification under the totting-up rules, so a full set of illegal tyres can, on its own, be enough to lose a licence.
It is stricter still for new drivers. Anyone within two years of passing their test has their licence revoked at 6 points, a threshold reached by just two illegal tyres. They then have to reapply for a provisional licence and pass the theory and practical tests again.
The insurance risk
The fine and points are only part of the exposure. If a car is found to have illegal tyres after an accident, an insurer may treat it as not roadworthy and reduce or refuse a claim. In a serious incident, that can mean being personally liable for damage and injury costs that dwarf the price of a set of tyres. It is a risk many drivers overlook entirely.
It is not only about tread
Tread depth is the most common reason a tyre is illegal, but it is not the only one. A tyre can also be illegal through damage such as cuts, bulges or exposed cord, by being the wrong size or rating for the vehicle, or by mixing tyre constructions on an axle. Any of these can attract the same penalties, which is why a quick legality check is worth the couple of minutes it takes, and anything that fails it is far cheaper to put right with a fresh set, ordered online from Tyres.co.uk, than to leave on the car.
From the workshop: when a customer hears the fine is per tyre, the penny usually drops. People budget for one tyre and assume one fine, but four illegal tyres is genuinely licence-losing territory, and far more expensive than just replacing them in good time.
Sources and accuracy. The fine and points figures, the totting-up and new-driver rules, and the insurance point here reflect UK law at the time of writing, which can change. Anything safety-critical should be confirmed against current official guidance. If anything here looks wrong, get in touch and we will check it and put it right.
Common questions
What is the fine for an illegal tyre in the UK?+
Up to £2,500 and 3 penalty points, and crucially this is per tyre, not per vehicle. Driving on illegal tyres can also lead to an MOT failure and, after an accident, problems with an insurance claim.
How much can four illegal tyres cost?+
Up to £10,000 in fines and 12 penalty points in total, £2,500 and 3 points for each of the four. Twelve points within three years is enough to be disqualified from driving under the totting-up rules.
Do penalty points for tyres affect new drivers more?+
Yes. Drivers within two years of passing have their licence revoked at 6 points, which just two illegal tyres would reach. They would then need to reapply and retake their tests.
Can illegal tyres affect my insurance?+
They can. If a vehicle has illegal tyres and is involved in an accident, an insurer may argue the car was not roadworthy, which can reduce or invalidate a claim. The financial risk can far exceed the cost of new tyres.