Category S write-off
Also known as: Cat S, Cat S write off, structural write-off
Category S means a UK vehicle has been written off due to structural damage but has been (or can be) repaired and legally returned to the road.
Cat S was introduced in October 2017 to replace the older Cat C classification. It applies to vehicles with damage to the structural frame, chassis or crumple zones - damage that affects how the car will perform in another collision, but which can be professionally repaired.
A Cat S vehicle is legal to drive once it has been repaired to a roadworthy condition; it does not need re-registering, and DVLA records the category on the log book (V5C). However, the write-off marker stays on the vehicle's record permanently. Insurance premiums on Cat S vehicles are typically higher, and the resale value is generally 20 to 40% below an equivalent vehicle with no write-off history.
Cat S vehicles can be a legitimate purchase if the repair quality is verifiable and the price discount reflects the marker. They should never be a surprise - always run a vehicle history (provenance) check before committing to buy.
How-to guides
- How to check if a car is a write-off (Cat A, B, S or N)Check whether a car has been written off and which category it was given. See the category, insurer and loss date by registration, and what each category means.
- Should you buy a Cat S or Cat N car?How to decide if a Cat S or Cat N car is worth buying: the repair evidence to ask for, when to get an inspection, insurance and finance, and how to price it.
- Cat C and Cat D write-offs: what they mean on an older carCat C and Cat D were write-off categories until October 2017. What they meant, how they differ from Cat S and Cat N, and what to check on an older car.
- How to start car flipping in the UK: a starter guide for part-time tradersHow to start car flipping in the UK: trader rules, insurance, tax, where to buy, what to pay and every cost, plus a free flip profit calculator to test deals.
Related terms
- Category A write-offCategory A is the most severe UK insurance write-off classification - the vehicle must be scrapped in its entirety with no parts salvaged for re-use.
- Category B write-offCategory B is the second-most-severe UK write-off - the body shell must be destroyed but salvageable mechanical parts may be sold for use in other vehicles.
- Category N write-offCategory N means a UK vehicle has been written off due to non-structural damage - cosmetic, electrical or component-level - and can be repaired and legally returned to the road.
- HPI checkAn HPI check is a UK vehicle history report that confirms whether a car is stolen, has outstanding finance, has been written off, has mileage discrepancy, or has had its plate, colour or keeper details changed.