What makes a car an insurance write‑off?
A car becomes an insurance write‑off when the insurer decides that repairing it would cost more than a set percentage of its pre‑accident market value, or when the vehicle is considered unsafe to return to the road. In the UK the Motor Insurers' Automotive Fraud and Theft Reduction (MIAFTR) scheme sets the thresholds and the four official write‑off categories.
MIAFTR write‑off categories explained
The categories are based on the extent of damage and the cost of repair relative to the vehicle’s estimated value at the time of the claim.
- Category A (Cat A) – The vehicle is so badly damaged it must be crushed. No parts can be reused.
- Category B (Cat B) – The vehicle is also written off for total loss, but parts may be salvaged and sold.
- Category S (Cat S) – Previously known as Category C. The car can be repaired and returned to the road, but structural repairs are required. A DVLA ‘S’ marker will appear on the registration certificate.
- Category N (Cat N) – Previously Category D. The car has non‑structural damage and can be repaired without affecting the vehicle’s structural integrity. No DVLA marker is added.
These categories are recorded on the DVLA’s database and appear on a vehicle’s MOT and V5C documents. They are also shown on most vehicle‑history checks.
How a write‑off affects a used‑car buyer
Buying a write‑off can be tempting because the price is often lower, but there are risks. A Cat S or N vehicle may have hidden damage that could affect safety, reliability, or resale value. Insurance premiums can be higher, and some insurers may refuse to cover the car or may charge extra for a vehicle with a write‑off history.
Cat A and B cars are usually unsuitable for road use, but they can be bought for parts or restoration projects. Always verify the write‑off status before making a decision.
Checking a car’s history
The safest way to confirm whether a vehicle has been written off is to run a full registration check. A reputable service will pull data from the DVLA, MOT history, and the MIAFTR database, showing any write‑off category, outstanding finance, mileage discrepancies, and whether the car has a PNC stolen marker.
Tip: Before you finalise any purchase, check the vehicle’s registration on motorpeek.com to see its full write‑off history and any other red flags.
What to do if you discover a write‑off
If the check reveals a write‑off, ask the seller for full details of the damage and any repairs carried out. Request receipts, a professional assessment, and, if possible, a road‑worthy certificate from an approved MOT centre. Compare the asking price with similar non‑written‑off models to ensure you’re getting a fair deal.
Should the price not reflect the risk, it may be wiser to walk away. Remember, a lower purchase price does not always offset the potential costs of future repairs, higher insurance, or reduced resale value.
Frequently asked questions
What does a Category S write‑off mean for a used car?
Category S indicates structural damage that has been repaired. The car can be driven legally, but the DVLA adds an ‘S’ marker to the V5C, and insurers may raise premiums.
Can a Category N car be insured at the same rate as a non‑written‑off vehicle?
Category N cars have non‑structural damage, so many insurers treat them like regular cars, but some may still apply a modest surcharge. It’s best to check with individual providers.
How can I find out if a car I’m interested in was written off?
Run a comprehensive registration check on motorpeek.com. The report will show any MIAFTR write‑off category, MOT history, finance status, mileage checks, and more.