Why write-off categories should be read before buying a cheap vehicle

A cheap car or van can look like an opportunity until the write-off marker is understood properly. Insurance categories are not decorative labels. They say something important about the damage history, the repair route and the future resale and insurance position.

The current UK category language is Cat A, Cat B, Cat S and Cat N. Category A vehicles are scrap. Category B vehicles are not returned to the road as a complete vehicle, although suitable parts may be recovered. Category S means structural damage that is repairable. Category N means non-structural damage. The difference between Cat S and Cat N is often where buyers make expensive mistakes.

The insurance write-off guide is useful because it explains the categories in the context of the current ABI salvage code and the practical checks a buyer should make before treating a repaired write-off as a bargain. A Cat N car with panel or electrical damage can still need careful inspection, but a Cat S vehicle raises deeper questions about structure, repair method, alignment and crash protection.

The ABI Code of Practice was updated in 2025. That matters because vehicle construction has changed. Electric vehicles, high-voltage batteries, advanced driver-assistance systems and newer body structures can make damage assessment more complicated than the old repair-cost shorthand suggests. Buyers need to know whether the category reflects repairable cosmetic damage or something that affected the structure of the vehicle.

The paperwork trail is central. A repaired write-off should have invoices, inspection evidence, MOT history and a clear explanation of the damage. Photos before repair are valuable because they show whether the visible finish matches the original condition. If a seller cannot explain what happened, who repaired it and what was replaced, the discount may not be enough.

Insurance is another practical issue. Some insurers will cover Cat S and Cat N cars, but premiums, terms and appetite can vary. Resale is affected too. The marker stays with the vehicle, so a buyer who gets a discount today should expect the next buyer to demand one as well.

None of this means every repaired write-off is unsafe or poor value. It means the category should be treated as part of the decision, not a footnote. A cheap vehicle only remains cheap if the repair standard, insurance position and future resale risk have been priced in.