What does Cat S mean? Category S explained

Category S means an insurer recorded structural damage and decided repair was uneconomical. What that means for buying, repairing, insuring and reselling.

BASICS · 4 min read

See this week's free Copart research shortlist →

The short definition

Category S (sometimes written Cat S) means an insurance company recorded the car as a structural write-off. The chassis, crumple zones, suspension turrets or another load-bearing part were damaged. The insurer decided it was not economical for them to repair, so they wrote it off and sold the salvage. It does not mean the car is scrap.

What structural damage actually covers

Structural means the parts that keep the car safe in a crash: chassis rails, sills, A, B and C pillars, subframes and suspension mounting points. A bent chassis leg is structural. A dented door is not. The S marker is about where the damage is, not always how bad it looks in photos.

Is a Cat S car legal to drive?

Yes, once it has been properly repaired and passes an MOT, with tax and insurance that knows the category. The DVLA issues a new V5C logbook with the S category recorded on it, and the marker stays on the record permanently. There is no separate DVLA inspection.

Get a graded deal ticket for your lot →

Can you insure and finance a Cat S car?

You can insure one, but you must declare the marker or the policy is void. Some insurers decline Cat S, some load the premium, and some pay reduced claims. Finance is harder because many lenders will not lend against a structural write-off, which shrinks your future buyer pool.

What Cat S means for a flipper

The auction discount on a Cat S car is usually deeper than the true repair cost on light structural hits, which is exactly where the profit is. But you need a bodyshop that can measure and pull a shell, and you must price the resale at 60 to 75 percent of a clean equivalent. Run the numbers in the Analyzer before you bid.

Cat S versus Cat N

Cat N is non-structural: cosmetic, electrical or mechanical damage with no chassis involvement, and the owner can keep the existing logbook. Cat S is structural and gets a new logbook with the category on it. Read our full Cat S vs Cat N guide for the money differences.

Confirm the write-off category, finance and stolen status, 5 credits

Related guides

• What does Cat N mean? Category N explained - Category N means a non-structural insurance write-off. What it covers, why it is the easiest salvage to flip, and the hidden traps that catch beginners.
• Cat A and Cat B explained: the cars that never come back - Category A and Category B are the two write-off categories you must never buy to put back on the road. Here is exactly what they mean and why.
• Cat S vs Cat N: the real differences - Structural versus non-structural write-offs compared: cost to return to the road, resale discounts, insurance, finance and which one to buy first.