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Write-off categories A, B, S and N explained

Insurers write a car off when repairing it is uneconomic or unsafe. Category A must be crushed, Category B can only be broken for parts, Category S had structural damage and can be repaired and driven again, and Category N had non-structural damage and can also be repaired. S and N replaced the old C and D in October 2017. A written-off car is typically worth 20 to 40 percent less than an equivalent clean one, and the marker stays with it for life.

The four categories

CategoryMeaningBack on the road?
AScrap only. Nothing can be salvaged, not even parts.Never
BBody shell must be crushed. Parts may be removed and sold.Never
SStructural damage, such as the chassis or crumple zones. Repairable by a professional.Yes, after repair
NNon-structural damage, such as panels, electrics or the interior. Repairable.Yes, after repair

Cars written off before 1 October 2017 carry the old categories C (repairable, repair cost exceeded value) and D (repairable, cheaper than value but the insurer chose not to). Those markers remain on older cars.

Why the marker is not on the V5C

The log book does not show a write-off. The insurer records it with the industry salvage register, and that record is what a vehicle history check reads. A free DVLA check shows tax, MOT and specification only. The write-off, finance and stolen markers come from paid data, which is why the full report costs money.

Buying a Category S or N car

Many are good value. A Category N with a replaced bumper and headlamp is a different proposition from a Category S with a straightened chassis leg. Ask for the repair invoice and photographs of the damage before repair. Some insurers decline cover or load the premium, so get a quote before you buy. Expect to sell it on at a discount as well.

How the categories affect a BeakScore

A write-off marker is the single largest negative in a vehicle history, and it does not expire. Finance can be settled and a stolen marker lifted, but a Category S remains for the life of the car.

Questions people ask

Is it illegal to sell a written-off car without saying so?

Selling as a trader without disclosing a known write-off is an offence under the Consumer Protection from Unfair Trading Regulations. A private seller must still answer honestly if asked, and a buyer can find it with a history check anyway.

Does a Category N write-off need a new MOT?

No. Categories S and N do not require a fresh MOT or an inspection before returning to the road, which is why a professional repair invoice and your own inspection matter.

Can a Category S be insured?

Usually, yes, but some insurers will not cover it and others charge more. Ask before buying rather than after.

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