# What Does Cat S Mean? Cat S Cars Explained

> What does Cat S mean on a car? A write-off after structural damage. Is a Cat S car safe to buy, what it is worth, insurance, and how to check.

Cat S means a car was written off after structural damage. What that means for safety, price and insurance, and how to check a car.

## What does Cat S mean?

**Cat S** (Category S) means a car has been written off by an insurer after **structural** damage: damage to the chassis, the frame, the crumple zones or other parts that hold the car together and protect you in a crash. Typical causes are a heavy collision or hitting a kerb or pothole hard enough to bend suspension mountings.

A Cat S car can be repaired and driven on the road again, but the repair has to restore the structure, so it should be done by a professional body shop.

Enter the registration in the search box above to start a check. The [write-off check](https://carcheckup.co.uk/written-off-vehicle-check) in the full report shows any write-off category, the date and, where recorded, the damaged areas.

## Cat S and Cat N: the difference

- **Cat S:** structural damage, professionally repaired.
- **[Cat N](https://carcheckup.co.uk/what-is-a-cat-n-car):** non-structural damage, such as panels, lights, trim or electrics.

Cat S replaced the old Cat C in October 2017, but the two do not match exactly: Cat C was about repair cost, Cat S is about the type of damage. Cat A and Cat B cars must never return to the road. See all [write-off categories explained](https://carcheckup.co.uk/blog/cat-s-cat-n-cat-c-cat-d-write-offs-explained/).

## Is it safe to buy a Cat S car?

A properly repaired Cat S car can be safe and good value, but this is the category where a poor repair matters most, because the structure decides how the car protects you in a crash. Before you buy:

- Ask what the damage was, and for photos of it and invoices from the body shop that repaired it.
- Pay for an independent inspection: ask the inspector to check the chassis legs, welding, panel gaps, paint depth, wheel alignment and the airbags.
- Test drive it on a straight road: the car should not pull to one side, and the steering wheel should sit straight.
- Walk away from a seller who cannot or will not show what was repaired.

## Cat S cars: price and insurance

**Price:** a Cat S car sells for noticeably less than the same car with a clean history, usually more of a discount than a Cat N car, and it will be worth less when you sell it too.

**Insurance:** many insurers cover Cat S cars, often at a higher price, and some decline them. You must tell your insurer the car is a Cat S write-off, or a claim could be refused. Get a quote before you buy.

## How to find out if a car is Cat S

Write-off records are held on the insurance industry's register and are not shown on the free DVLA record or the MOT history. A [written-off car check](https://carcheckup.co.uk/written-off-vehicle-check) shows the category and date. The full report also shows salvage auction records, which can reveal damage even when no write-off is recorded, plus [outstanding finance](https://carcheckup.co.uk/outstanding-finance-check) and [stolen](https://carcheckup.co.uk/stolen-car-check) records.

## Cat S FAQs

**What does Cat S mean on a car?** It was written off by an insurer after structural damage, and has been, or can be, professionally repaired and driven again.

**Is Cat S worse than Cat N?** Generally yes: Cat S means the structure was damaged, Cat N means it was not. A well-repaired Cat S car can still be a better buy than a badly repaired Cat N one.

**Can you drive a Cat S car?** Yes, once it has been repaired and is roadworthy, with a valid MOT, tax and insurance.

**Does a Cat S car need to be re-registered?** No. It keeps its registration.

**Can a Cat S car pass an MOT?** Yes, if the repair makes it roadworthy. An MOT checks the car's condition on the day, not whether it was written off, so it is no proof of a good structural repair.

**Does a Cat S record ever come off?** No. The write-off stays on the car's record for life.

Run the check: enter a UK registration or VIN at https://carcheckup.co.uk/what-is-a-cat-s-car (free: DVLA details, MOT history and mileage readings; finance, write-off, stolen, keeper records and the mileage anomaly check are in the full report). HTML page: https://carcheckup.co.uk/what-is-a-cat-s-car