Cat S vs Cat N Cars UK — What's the Difference?
The UK's salvage categories changed in 2017. Cat S and Cat N replaced the old Cat C and Cat D classifications — but many buyers still don't fully understand what they mean for repair costs, insurance, and resale value. This guide explains everything.
What is a Category S Car?
A Category S vehicle has suffered structural damage. This means the chassis, crumple zones, sills, A-pillars, or other load-bearing components have been compromised. Before a Cat S car can legally return to the road, the structural damage must be professionally repaired and the vehicle must be re-inspected.
Crucially, the "S" stands for structural — not "serious". A relatively minor collision can result in a Cat S write-off if it catches a structural panel, even if the rest of the car is fine.
What is a Category N Car?
A Category N vehicle has non-structural damage. This covers cosmetic damage (bodywork, bumpers, lights), electrical faults, airbag deployments, or mechanical damage that doesn't affect the vehicle's structure. A Cat N car can legally be driven away from auction — though it should still be properly repaired before regular use.
Cat S vs Cat N: Repair Cost Comparison
| Factor | Cat S | Cat N |
|---|---|---|
| Structural repair needed | ✓ Always | ✗ Never |
| Average repair cost (mid-size hatchback) | £2,000–£5,000+ | £800–£2,500 |
| Can be driven unrepaired | ✗ Illegal | ✓ Technically yes |
| Insurance difficulty | High — many refuse | Moderate |
| Resale value vs PAV | 20–35% discount | 10–20% discount |
| Profit potential | Higher risk, higher reward | Lower risk, steadier margins |
Which Should You Buy?
For most private buyers, Cat N offers the safest entry point. Repairs are simpler, insurance is easier to arrange, and the vehicle doesn't require a structural re-inspection before returning to the road.
For experienced repairers or those with access to professional bodyshops, Cat S can deliver excellent returns — but only when the numbers stack up. The key is knowing your repair cost ceiling before you bid.
Insurance for Cat S and Cat N Vehicles
Both categories are recorded on HPI and similar vehicle history databases permanently. You must declare the salvage history when arranging insurance — failure to do so can invalidate a claim. Many mainstream insurers will decline to cover Cat S vehicles. Specialist salvage car insurers (such as Adrian Flux or Flux Direct) cater specifically to this market.
Frequently Asked Questions
What is a Category S car?
A Category S vehicle has suffered structural damage — chassis, crumple zones, sills or A-pillars. It must be professionally repaired and re-inspected before legally returning to the road.
What is a Category N car?
A Category N vehicle has non-structural damage — cosmetic, electrical, airbag or mechanical — and can legally be driven, though it should still be properly repaired.
Which is cheaper to repair, Cat S or Cat N?
Cat N is generally cheaper to repair, typically £800–£2,500 for a mid-size hatchback, versus £2,000–£5,000+ for Cat S structural repairs.
Know Your Numbers Before You Bid
Whether it's Cat S or Cat N, RepairIQ estimates your repair range, max safe bid, and profit potential in under 2 minutes — free.