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What Does Cat S And Cat N Mean?

When it comes to buying a new car, knowing about the history of your new wheels is key. One of the things to check is whether the car has been written off in the past. As part of your checks, you might come across different classifications of write-offs, like Cat S and Cat N, but are not sure what they mean. We've broken down each classification so that you know what to look out for when purchasing your next car.

👉 What is an insurance write-off?
👉 What are the different insurance write-off categories?
👉 What is Cat S?
👉 What is Cat N?
👉 What are the differences between Cat N and Cat S?
👉 Should I buy a car that's previously been written off?
👉 Conclusion
👉 Cat S and Cat N FAQs

Two cars colliding, with both suffering serious damage.

What Is An Insurance Write-Off?

An insurance write-off is when a car is damaged to a point where it is either no longer roadworthy or repairing it makes no financial sense. In a write-off, your insurance company will pay you the current value of the car instead of repairing it. In order to know how serious the write-off is, your car will be assigned to a specific category. We’ve taken a look at each below.

Side view of a grey SUV with significant damage to the rear door, showing the aftermath of a collision or accident.

What Are The Different Insurance Write-Off Categories?

There are six write-off categories, all varying in how damaged your car is. Let’s break down each category.

  • Category A - Category A is the worst level of write-off there is. At this point, the car is beyond repair and needs to be crushed.
  • Category B - This is when the main part of the car is damaged but other parts can be salvaged.
  • Category C - The car can be repaired but repairing it will cost more than what the car is worth.
  • Category D - You can repair the car for less than it’s worth but transporting it for repairs might end up costing more than the car is worth.
  • Category N - The car hasn’t suffered any major structural damage but must be repaired to make it roadworthy.
  • Category S - The car has suffered structural damage but can be repaired. It will need to be repaired to be ready for the road.
Close-up of a rear-end collision involving a red and a yellow car, showing significant damage to both vehicles.

What Is Cat S?

A Cat S car can be driven on the road again but will need repairs to make it roadworthy. The S itself stands for structural damage, but it can be repaired. Damage will likely have occurred to the chassis or suspension, but the important thing is that it can be fixed. Once the car is fixed, it’s important to remember that your car needs to be re-registered with the DVLA. Not doing this could lead to you receiving a fine. AutoTrader have listed some of the more common category s write-offs.

  • Car chassis or frame damage.
  • Damage to the frame of the car.
  • Suspension damage.
  • Severe roof damage.
  • Damage to the floor pan.
  • A severe front or rear-end collision causing structural damage.
A car collided into a van in front, with the front bonnet damaged, but nothing else seriously damaged, symbolising a minor crash.

What Is Cat N?

Cat N cars have suffered damage, but these aren’t structural. However, if the car is to be driven on the road, it will need to undergo repairs. Again, the car will need to be re-registered with the DVLA, or you could face a hefty fine. AutoTrader has detailed some of the more common examples of a Cat N write-off.

  • Cosmetic damage like dents and scratches.
  • Electrical issues like wiring.
  • Interior damage like damaged seating and water damage.
  • Damage to non-structural components.
  • Engine and gearbox issues.
  • Damage to windows or windscreen.
  • Damage to the exhaust or catalytic converter.
  • Cosmetic fire damage.
A blue flame meets a red flame, with each rebounding as they meet. This represents a battle between two things.

What Are the Differences Between Cat N And Cat S?

The main difference between a Cat N car and a Cat S car is the level of damage. In a Cat N car, non-structural damage has occurred. Whereas for a Cat S car, structural damage has occurred. Both can be driven on the road again but will need repairs in order to be road-worthy. Cat N issues tend to be more cosmetic, and Cat S issues more structural.

A red toy car sat on a keyboard, symbolising online car buying.

Should I Buy A Car That’s Previously Been Written Off?

You can buy a car that’s been written off in the past, but you should always request an inspection before making the final decision. Cars that can be bought after undergoing a write-off fall in the categories C,D,N, and S. Therefore, when it comes to making a car purchase, if you notice a previous write-off, it is best practice to request a full inspection of the car to make sure all previous issues are resolved. Alternatively, you can bring a mechanic with you to inspect the car in person.

Conclusion

Write-offs happen, and this doesn’t necessarily mean that the car is ruined. For Cat A and B, the car is unfortunately unrecoverable, but for the other categories, C,D,N and S, the car can get back to being road ready. If you are about to buy a car and spot a past write-off, don’t panic. Order an inspection of the car to make sure all previous issues are corrected, and if they are, you can go ahead and buy your car!

Person holding a white question mark next to a red toy car, symbolising inquiries or uncertainties related to car ownership, buying, or financing.

Cat S And Cat N FAQs

What is a Cat S car?

A Cat S car is one that has suffered structural damage, but this damage can be repaired, and the car can return to the road (provided the repairs are made).

What does Cat N mean on a car?

A Cat N car is one that has suffered non-structural damage, but this can be repaired, and the car can return to the road (provided the repairs are made).

What is a write-off?

A write-off is when your car has been damaged to a point where it can no longer be on the road or where the cost of repairing the car is worth more than the actual car.

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