Cat N (formerly Cat D) cars – the ultimate guide

So, what are Cat D cars? Cat D cars (now officially called Category N) are vehicles an insurer has decided are uneconomical to repair after damage.

When an insurer decides not to repair a damaged car after an accident, it is classed as ‘written off’. That means it is no longer suitable for the road.

A ‘write off’ is essentially an accounting term for something that has had its value greatly reduced. But not all insurance write-offs are equal, and a Cat D car is a very particular classification of vehicle.

What is a Cat D car?

But what are Cat D cars in practice? They are also known as ‘Category D’ or, more recently, ‘Category N’.

In each case, the insurer has assessed the damage as uneconomical to repair. Under the old Cat D system, the threshold was often cited as 50% or more of the car’s value, though it varied by insurer. The current Category N classification is based on the type of damage rather than a fixed cost threshold.

You can check your car’s value to see where a repair bill would leave you.

Cat D status does not always mean the car is badly damaged or fit only to become a scrap car. It means the insurer, who has a duty to return the car to its original condition, decided repair was uneconomical.

So there are many Cat D cars on the road, as plenty are still safe to drive after repair. Owners often keep the car once it is fixed, or sell it on.

Even with newer cars, fairly cosmetic scrapes can be enough to write off the vehicle. This is because new panels, painting, and finishing can cost too much. The bill gets too close to the actual value of the car to be worth fixing.

But Category D does not just cover minor paint and bodywork damage. It can also include non-structural parts that stop the car being drivable, such as the brakes, steering, and electrics. This guide explains how to navigate insurance write-offs, whether you are selling a Cat D car or buying one to repair.

What this Cat D car guide covers

1. Buying and repairing Cat D cars
2. What are the other categories for insurance write offs?
3. Buying a Cat D
4. Selling a Cat D car
5. Insuring a Car D car, does it cost more?
6. How to check if a car is a Cat D?
7. How to repair a Cat D car?

Buying a Cat D car

Want to save money and practise your mechanical skills? Buying and repairing Cat D cars could be the answer.

When a car is damaged in an accident, the insurer decides whether to repair or destroy it. A Cat D car might not be economical for the insurer to fix, but nothing stops you from repairing it yourself and saving money.

Being an insurance write-off can affect the future value of your car, and it can make insurance more complicated. But rebuilding a category D car can give you a road or track toy you might not otherwise afford.

Now known as Category N, and focused more on the car’s condition, making the most of Cat D cars comes down to research. That is where this guide can help you secure a bargain.

What are the other write-off categories?

Not every damaged car falls into Category D. There are four current write-off categories in the UK.

Until October 2017, these were Category A, B, C, and D, with both C and D based on the economic viability of repair. From October 2017, the Association of British Insurers updated its salvage code, replacing Cat C and Cat D with Cat S and Cat N. The new categories focus more on the car’s condition than on cost.

Some cars, such as classics or models of special interest, can be repaired regardless of the damage. They just need to be safe to return to the road.

Category A: junk cars so badly damaged they must be destroyed for scrap or put through a scrappage scheme. Even salvageable parts must be crushed. Few car buying sites will buy them.

Category B: cars that must be destroyed, with the body shell crushed. They have suffered extensive damage, though some parts can be removed and reused in other cars.

Category C: repairable damage that costs more to fix than the car is worth, including accident, flood, and fire damage. This has now been replaced by Category S.

Category D: relatively minor damage that is still enough for the car to be written off as too expensive to repair. This has now been replaced by Category N.

Category S: since October 2017, cars with repairable structural damage, such as a bent chassis or collapsed crumple zone. You will need a professional repair for it to be safe to drive.

Category N: replaces Cat D, for cars with no structural impact but that are still too costly to repair. Issues can be cosmetic, electrical, or affect parts such as the brakes and steering.

The official write-off categories today are A, B, S, and N. Category C and D are the pre-2017 labels you may still see on older history checks.

A repaired Category S car needs a new V5C from the DVLA, which records the write-off category before it returns to the road. A Category N (formerly Cat D) car keeps its existing log book. According to the government’s official guidance, you “can use the vehicle again if it’s repaired to a roadworthy condition”.

Why is a car written off as Cat D?

An insurer writes a car off as Cat D, now Category N, when repair costs are uneconomical compared with the car’s value. The damage is non-structural, so the chassis and crumple zones are intact. As gov.uk sets out, a Category N car can return to the road once repaired to a roadworthy condition.

It is a financial decision by the insurer, not a sign the car is beyond saving. That is why so many former Cat D cars stay on the road.

Should you buy a Cat D write-off car?

Whether you buy a Cat D car depends on the specific vehicle, your mechanical knowledge, and your plans for it once repaired.

For many category D cars, the answer comes down to economics. Can you buy the damaged car cheaply enough to make repair worthwhile? Or would a regular second-hand car simply cost less?

That depends on the cost of parts and labour. It also means being honest about how much work you are willing and able to take on.

Cat D can be a route to a car you could not otherwise afford. A category D Ferrari or Porsche costs far less than one in mint condition, and the same applies to vintage models.

Disadvantages of buying Cat D cars

Buying a category D car can be a gamble, and reducing your risk takes plenty of research.

Trade dealers have a legal obligation to disclose all information on every car they sell. Private sellers only have to make sure the car is as described, so tread carefully when buying a Cat D privately.

Any guide to buying second-hand cars will recommend a history check. If you are considering a category D write-off, it is worth investing in a professional inspection, which can reveal damage you might have missed.

A professional inspection may also help when you come to arrange insurance cover, as we explain below.

Many category D car buyers limit themselves to trade dealers. This brings greater confidence in the description, plus the option to return the car if repaired parts cause problems.

Buyers may find existing repairs were done badly or with substandard parts. That can be an annoyance at best, or a safety risk at worst.

Advantages of buying a Cat D car

The big advantage of buying a category D write-off is the saving. It can get you a car you might not otherwise afford.

It also gives you the chance to sharpen your skills as a mechanic, or to bring your own written-off car back to life. And it can let you spend relatively little on a track day toy.

A category D car carries the record on its logbook for the life of the vehicle, which affects the sale price. It will also come with limited insurance options.

Selling a Cat D car

Selling a category D car is essentially the same as selling any other car. But you need to factor in its history and write-off status when trading it in or selling it on.

When you sell a Cat D car on Motorway, more than 8,000 verified dealers compete for it. You get free home collection and same-day payment once you accept an offer.

It is always best to be honest and disclose the information rather than risk legal action later. You must also tell the DVLA if your car has been written off. You can be fined £1,000 if you do not, according to gov.uk.

Who buys category D cars?

Cat D cars are generally bought by the same people as any other car. That includes online car buying services and professional dealers. It can also mean private buyers.

A Cat D car usually attracts fewer buyers, because of the added risk involved. If you advertise online, many sites will ask you to disclose that the car is a category D write-off.

Will a category D car sell for less?

A Cat D car is usually valued noticeably less than a similar model of the same age, mileage, and condition. That holds true even when it has been repaired to a high standard.

Trade estimates commonly suggest a repaired Cat D car sells for around 20% to 40% less than a clean-history equivalent. The actual figure varies with damage severity, repair quality, and vehicle age.

Even so, it’s often easier to sell a Cat D car that still needs repairing. A buyer with the right expertise can save money by doing the work themselves.

What helps to sell a category D car?

If your Cat D car still needs repairing, documenting the damage accurately will help. If you have fixed it yourself or hired a professional, supply as much detail, receipts, and other evidence as you can.

Insuring a Cat D car

You can insure a repaired Cat D car for road use. The exact cost depends on your circumstances. Insurers may charge less if you bought back and repaired your own car that was previously insured with them.

Is it more expensive to insure a Cat D car?

In general, expect to pay a higher premium to insure any car recorded as a category D write-off. Some brokers and insurers may refuse cover, but most will charge slightly more.

You tend to get the same level of cover as any other owner, and in some cases the same price. While you do not need a specific test to put a category D car back on the road, insurers may require a professional inspection first.

Is it worth insuring a Cat D car?

It is cheaper to pay a higher premium than to risk invalidating your insurance by not declaring the car properly. The savings from buying and repairing a write-off can offset the higher insurance cost, so you may still save money overall.

Where to check a policy covers category D cars

Most big comparison sites do not ask you to declare a category D car during the quote process. So it’s down to you to contact insurers individually and check whether they’ll cover the car. Alternatively, use a specialist broker to do the legwork for you.

How to check if a car is Cat D

A car trader has to declare if a car has been written off as part of any sale. Private sellers do not have to reveal a category D car by law. So it is worth investing in a car data check before you buy.

Can you check for a category D car online?

Several companies offer vehicle history checks, including HPI, the RAC, and the AA. They cost anywhere from £6 to £20 and also cover outstanding finance, reported thefts, and more. All are available online and simply need the registration number.

The dangers of buying a category D car by mistake

If you discover you have bought a repaired car previously recorded as a Cat D, problems can follow. You may not be covered by your insurer after an accident. Any payout may also be based on a much lower value than you expected, so a vehicle history check is a worthwhile investment.

How to repair a Cat D car

If you are buying a damaged, unrepaired category D car, you have the normal options for repairing it. If you are skilled and confident, or willing to learn, you can do much of the work yourself. Alternatively, you can hire professional mechanics and painters for part or all of the job.

If you are repairing a Cat D car, you need to be more diligent than ever about checking everything and documenting all your work.

How much will it cost to repair a category D car?

The cost of repairs depends on the original damage, how much work you can do yourself, and your choice of manufacturer or aftermarket parts.

For some manufacturers, original parts add a hefty cost. Rarer cars may require patience while you track down what you need.

Try to estimate the cost before you buy. Allow for the price to creep up if you discover extra issues or need parts that were not in your original budget.

Is it worth repairing a category D car?

Whether it is worth repairing a Cat D car depends on who you ask. Some owners have had bad experiences and escalating costs.

Others have landed a dream car at a bargain price after some time in the garage. Ultimately, it comes down to being realistic about the risks and commitment involved.

Cat D car FAQs

What is a Cat D car?

A Cat D car, now officially Category N, is a vehicle an insurer decided was uneconomical to repair after non-structural damage. The car is often still safe to repair and drive. Cat D reflects the cost of repair, not the severity of the damage.

Is buying a Cat D car a good idea?

It can be, if the numbers work and you are honest about the repairs involved. A category D car can get you a model you could not otherwise afford. But it sells for less later and comes with limited insurance options, so research the specific car first.

Cat D vs Cat C, and Cat N vs Cat S

Cat C and Cat D are the pre-2017 labels, replaced in October 2017 by Cat S and Cat N. Cat S covers repairable structural damage. Cat N covers repairable non-structural damage, the category that now applies to what used to be Cat D.

How do I check if a car is Cat D?

Buy a vehicle history check from a provider such as HPI, the RAC, or the AA. Enter the registration number, and the check reveals write-off records, outstanding finance, and reported thefts. Checks cost roughly £6 to £20.

Is a Cat D car more expensive to insure?

Usually, yes. Most insurers charge a higher premium for a car recorded as a category D write-off, and a few may refuse cover. You will normally get the same level of cover, though insurers may ask for a professional inspection first.

Ready to sell?

Need to sell your car, or want to understand more about documentation or maintenance? Check out more of our guides here, covering everything from the paperwork you need when buying and selling, to various notices you may need to file with the UK’s driver and vehicle licensing agency. 

• Scrap my Cat D car
• How to sell your car
• Should you sell a diesel car?
• Should you sell a petrol car?
• How to buy or sell a private number plate
• Service history – the ultimate guide
• V5C – the ultimate guide to the V5 logbook
• How to sell a car without a V5C
• Car scrappage schemes
• Car buying sites – selling sites explored