Cat S and Cat N cars can be insured. The question is whether the cost and difficulty make them worth buying in the first place.
What Cat S and Cat N Mean
When an insurer writes off a vehicle, they categorise the damage. Since October 2017:
Cat S - Structural damage. The car's safety structure (chassis, crumple zones, pillars) was damaged. Must be professionally repaired and re-inspected before returning to the road.
Cat N - Non-structural damage. Bodywork, cosmetics, electrical systems. The car can legally return to the road without a compulsory re-inspection, though a thorough check is strongly advisable.
The old Cat C and Cat D categories were retired in 2017. Any car registered with those categories still carries them.
Getting Insurance on a Write-off
Most major insurers will quote for Cat N cars. Fewer are willing to quote for Cat S. Specialist insurers and brokers who handle modified and non-standard vehicles are more likely to provide cover.
Expect premiums to be higher than for a car with a clean history. The insurer is taking on more uncertainty about the repair quality and the car's structural integrity in a future claim.
Some direct insurer websites and comparison aggregators automatically exclude write-offs from results. If you cannot find a quote online, call insurers directly or use a broker.
The Declaration Requirement
You must tell your insurer about the write-off category when you apply for cover. This is not optional.
If you do not declare it and your insurer discovers the write-off - during a claim, renewal check, or at any other point - they can void your policy from inception. That means you were effectively uninsured for the entire period. Any claim made during that time can be refused and recovered from you.
What Insurers Want to Know
Most will ask:
- The write-off category
- Whether the car has been repaired
- Evidence of the repair (engineer's report, inspection certificate)
- The repairer's credentials (accident repair centre, bodyshop, private)
For Cat S, having a documented repair by a reputable bodyshop with before and after photos and an independent structural inspection significantly improves your chances of getting cover at a reasonable price.
Valuation at Claim Time
If a Cat S or Cat N car is written off again, the insurer will value it as a write-off. That value will be lower than an equivalent car with a clean history. This is a permanent discount that follows the car regardless of how well it was repaired.
Factor that into the purchase price. If you pay too much for a write-off, you may end up underinsured at claim time.
Check the History Before You Buy
Before you decide whether a Cat S or Cat N is worth it, run a full check at check.bad-drivers.uk. The full report shows the write-off category, the date of the incident, and whether any other markers are present. A clean finance and stolen check alongside the write-off record is at least a better starting position than one with additional problems.
Useful Links
- FCA guidance on car insurance - Regulated insurance information
- ABI write-off categories explained - Industry body explanation of categories
- Citizens Advice - car insurance disputes - What to do if a claim is refused




