What is a Cat A, Cat B, Cat S or Cat N write-off car?

While searching for a used car, you may see listings marked “Cat S” or “Cat N”. Here’s what they mean – and whether buying one is a smart move.

A “Cat” car is a vehicle that an insurer has deemed beyond economic repair, meaning it’s cheaper to replace than fix. These write-offs are grouped into categories that indicate the type and severity of damage.

The main categories are Cat A, Cat B, Cat S and Cat N. Cats S and N replaced the older Cat C and D system in 2017. This guide explains what each category means and whether these cars are worth considering.

If your car is a write off, you can buy a brand new or used car right here on Carwow. We’re here to help you through every step of your car-changing journey.

What is an insurance write-off?

An insurance write-off is a car that’s been so badly damaged that it’s considered unsafe or uneconomical for an insurer to repair. Instead of fixing it, the insurer declares it a total loss and removes it from the road, usually when repair costs reach around 50-70% of its value once additional expenses such as transport and storage are included.

Write-offs are classified into categories A, B, S and N, with S and N replacing the older C and D system in 2017 to better highlight structural damage and safety concerns.

Here’s a quick breakdown of the four write-off categories, with a more detailed explanation for each below.

• Cat A – Severe damage; vehicle must be crushed and no parts can be reused
• Cat B – Severe damage; vehicle cannot be repaired, but some parts may be salvaged before the shell is crushed
• Cat S – Structural damage that can be repaired
• Cat N – Non-structural damage that can be repaired

What is a Cat A car?

Category A write-offs are vehicles that have suffered severe structural damage and must never return to the road. The chassis and/or body shell will have been extensively damaged, often as a result of a collision or fire.

The entire vehicle must be crushed, and a Certificate of Destruction issued once it has been disposed of. No parts from a Cat A vehicle can be reused.

If your car is classified as Cat A, the insurer will usually handle the disposal process. You’ll need to send the V5C logbook to the insurer (keeping the appropriate section) and notify the DVLA that the vehicle has been written off.

What is a Cat B car?

Category B write-offs have suffered severe damage and cannot be returned to the road. The vehicle’s structure is considered unsafe and must be crushed once any usable parts have been removed.

Some components may still be salvaged for use on other vehicles, but the shell itself is permanently destroyed and handled through authorised treatment facilities.

In most cases, the insurer takes control of the vehicle once it is declared a Cat B write-off, arranges disposal, and settles the claim with the policyholder, with no responsibility for scrapping resting on the owner.

What is a Cat S car?

Category S write-offs have suffered structural damage, such as to the chassis or crumple zones. The key difference between Cat S and Cat A or B is that Cat S vehicles can be repaired and returned to the road.

Once repaired, the car must be made roadworthy and properly documented, and it may be inspected by an insurer or engineer to confirm the repairs are safe. The vehicle’s status is recorded on its history, and it must be declared as Cat S if sold in the future.

When a car is written off as Category S, the insurer will usually take ownership after paying out but may offer you the option to buy it back. This is because repaired Cat S vehicles can legally be driven again once they meet roadworthiness requirements.

There’s no need for a new registration number, but the write-off category will remain recorded on the vehicle’s history and logbook (V5C).

What is a Cat N car?

Category N write-offs are vehicles that have suffered non-structural damage and can be repaired to a roadworthy condition. Once repaired, they can be returned to use.

“Non-structural” damage typically includes items such as lights, wiring, body panels and interior components, rather than the car’s main structural frame.

A Cat N car doesn’t require a special DVLA inspection before returning to the road, but it must still pass a standard MOT to be driven legally.

Once a car has been given Cat N status, it can be bought and sold like any other vehicle. The write-off marker remains recorded on its history, but it does not require re-registration, and the V5C logbook is simply updated to reflect its status.

What happens if my car is written off?

If your insurer decides it isn’t economical to repair your car, it will declare it a write-off, dispose of the vehicle, and pay you a settlement based on its pre-incident market value. If you have GAP insurance, it can cover any shortfall between that payout and what you still owe on finance.

Cat A cars must be scrapped and cannot legally return to the road, so you’ll receive your payout and the vehicle will be destroyed.

Cat B cars can be bought back, but the body must be crushed and only parts may be salvaged or reused.

Cat S and Cat N cars can be repaired and returned to the road, and may be bought from insurers. However, repairs can be costly and time-consuming. The car’s write-off history will permanently reduce its value and must be declared when selling.

If you want to keep a Cat S or Cat N vehicle, you’ll need to agree a price directly with your insurer.

Can I dispute an insurance write-off?

Yes, but you need to be confident in your case.

If you’re challenging the insurer’s decision, you’ll need evidence such as independent repair quotes from reputable garages and proof of your car’s true market value.

However, bear in mind that insurers must record written-off vehicles on the MIAFTR (Motor Insurance Anti-Fraud and Theft Register) within seven days of declaring them a write-off. Once listed, it is very difficult to have a car removed, and this database is used by vehicle history check providers to identify write-offs.

What if I’m not happy with the repairs to my Cat S or Cat N car?

If you’re not satisfied with the repairs to your car, you should inform your insurer immediately, regardless of the extent of the work. Poor-quality repairs could affect its resale value or, more importantly, its safety.

Inspect the vehicle carefully as soon as it is returned and note any issues. If you’re not confident doing this yourself, organisations such as the AA and RAC offer vehicle inspection services. Be sure to explain what work has been carried out so the engineer knows what to check. You’ll receive a report outlining any problems, which should be sent to your insurer.

The insurer should then arrange any necessary rectification work. In some cases, you may need to repeat this process until the repairs are completed to a satisfactory standard.

If repeated attempts fail to resolve the issues, you may be entitled to escalate the complaint or seek a financial settlement or replacement vehicle, depending on your insurer’s terms and the circumstances.

Should I buy a Cat S or Cat N car?

Cat S and Cat N cars can offer good value, but they are not risk-free. You should expect to pay less than for an equivalent car that has never been written off, and even after repair, they will usually be worth less at resale.

The key is to do thorough checks and understand the history and quality of the repair before committing. Here are some important steps to reduce risk:

1. Get a history check: A vehicle history check will confirm write-off status and flag issues such as theft, outstanding finance, or identity problems.
2. Consider buying from a dealer: Buying from a reputable dealer offers more consumer protection than a private sale, making it easier to resolve issues if something goes wrong.
3. Ask for full repair details: Request evidence of damage and repairs, including photos where possible. Lack of clear information is a warning sign.
4. Be cautious about repair quality: Even properly repaired structural damage can cause future issues, so ensure work has been carried out to a high standard.
5. Check insurance first: Some insurers will not cover Cat S or Cat N vehicles, and others may charge higher premiums.
6. Consider a warranty: A warranty can help cover unexpected repair costs, but not all providers include write-off vehicles.

Do Cat S or N cars cost more to insure?

Cat S cars generally cost more to insure than Cat N cars because the former have sustained more severe damage impacting the vehicle’s frame. Insurers view them as higher-risk and will often charge a higher premium.

Insurance write-off cars FAQs

Is car insurance cancelled after a write-off?

When your car is written off, your insurer will usually settle the claim by paying out its value and taking ownership of the vehicle. At that point, the cover for that car ends. You’ll then need to arrange a new insurance policy if you replace it with another vehicle.

Can I insure a repairable write-off?

Yes, you can insure a repairable write-off, so long as it’s a Cat S or Cat N vehicle.

How do insurance companies value write-offs?

Insurance companies value a write-off based on its pre-accident market value, which is the amount the car would reasonably have sold for just before the incident. This is calculated using similar vehicles of the same make, model, age, mileage, and condition on the open market. Cars will typically then be considered a write-off if the cost of repairs comes to about 50-70% of this value.

How can I check if my car is a write-off?

To check if your car has been written off, you’ll need to look it up on the Motor Insurance Anti-Fraud and Theft Register (MIAFTR), which is the UK database insurers use to record total loss vehicles.

The simplest way to access this information is to run a full vehicle history check using the registration number. Services such as HPI check will show whether the car has been recorded as a write-off, along with its category (A, B, S or N) and the date it was declared a total loss.

What is a Cat C car?

A Category C car is an older UK insurance write-off classification for a vehicle that was damaged in an accident, fire or flood. It meant the car was repairable, but the cost of repairs was higher than its market value, so the insurer decided it was uneconomical to fix.

What is a Cat D car?

A Category D car is an old classification that has sustained non-structural damage. It was deemed uneconomical to repair because the total cost of repairs – along with additional expenses such as administration, recovery, or a courtesy car – was higher than the car’s market value, even if the repair costs alone were not.

Car change? Carwow!

Looking for a new set of wheels? With Carwow you can sell your car quickly and for a fair price – as well as find great offers on your next one. Whether you’re looking to buy a car brand new, are after something used or you want to explore car leasing options, Carwow is your one stop shop for new car deals.

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