How Much Does Cat S or Cat N Reduce a Car's Value? (UK)

A Cat N car is usually priced 10% to 20% below the same car with a clean history, and a Cat S car 20% to 30% below, sometimes more. Those are this guide's working ranges, built from salvage trade guidance and what repaired write-offs actually sell for. Cat S loses more than Cat N because the damage was structural. In both cases the marker is permanent, so the discount follows the car through every future sale, including yours.

There is no official table. Motoring press tends to put the gap in cash terms: a few hundred pounds on an older car, thousands on a newer one. Salvage trade guidance we have seen puts a properly repaired Cat N at 10 to 15% below clean market value and a Cat S at 20 to 30% below, and suggests pricing at clean value minus 12% for Cat N and minus 25% for Cat S. The 10 to 20% range for Cat N used here stretches that trade figure to cover cars where the Cat N damage was from an accident rather than theft, flood or vandalism, which buyers discount harder. The real figure for a specific car depends on the model, the age, the repair and the paperwork. The rest of this guide explains where the discount comes from, how to turn a range into a price for the car in front of you, and what the marker does to the sale when you come to sell it on.

How much less is a Cat N car worth?

A Cat N car is commonly valued 10% to 20% below an identical car with no write-off history. Some trade commentary pushes the top of that range to 25% on cars where the repair was cosmetic and well documented, and some sellers of very popular models hold out for the bottom of it. Most deals land in the middle.

Cat N (the current category for non-structural damage, which replaced the old Cat D in October 2017) covers cars an insurer wrote off because repair would cost too much against the car's value, even though the chassis and structure were not damaged. Think of a stolen-and-recovered car with a broken ignition barrel and trashed interior, a hailstorm that dented every panel, a flood that reached the carpets, or a heavy rear bump that needed new bodywork and lights but left the frame alone.

The insurer's decision is about economics, not safety. A 2012 hatchback worth £4,000 can be written off because the repair estimate is £3,000 plus the salvage value, while a perfectly good repair on a £40,000 car would never be written off for the same damage. That is why you will see Cat N on cars that are, in practice, sound. It is also why we cover whether a Cat N car is worth buying in its own guide. This one is purely about the money.

Where in the range will a Cat N car sit? A few rules of thumb from how the trade prices them:

• Older, cheaper cars sit nearer the 20% end. When the repair cost was a large share of the car's value, the car is more likely to carry a mix of cheap parts and tired panels, and buyers know it.
• Newer, in-demand cars sit nearer the 10% end. A two-year-old family SUV with a documented, franchised-dealer repair attracts more interest than a ten-year-old supermini.
• Cosmetic or theft damage is easier to forgive than accident damage. A Cat N after a recovered theft or a flood is judged differently from a Cat N after a front-end collision, because buyers fear hidden structural or electrical trouble in the latter.

How much less is a Cat S car worth?

A Cat S car is commonly valued 20% to 30% below a clean equivalent, and for some cars the gap is wider. Cat S means the vehicle suffered structural damage, such as to the chassis, floorpan, a pillar or a crumple zone, and an insurer judged repair uneconomic. The car can legally return to the road once it has been repaired to a roadworthy condition, but buyers, insurers and lenders treat it with more caution than a Cat N car.

Why more caution? Because structural repairs are the hardest to judge from the outside. A well-done repair on a sound chassis can drive perfectly and last for years. A poor one can affect how the car crumples in the next crash, how the tyres wear and how the doors close. Buyers cannot see which one they are looking at, so they price the uncertainty into the offer. Our guide to Cat S write-offs explains what structural damage means in practice, and whether you can insure a Cat S car covers the premium side.

A realistic way to think about a Cat S range is as three tiers:

If you are looking at a Cat S car priced as though it were clean, or with only a token discount, treat that as a signal. Either the seller does not understand the history, or they hope you do not.

Illustrative examples: what the percentages mean in pounds

These figures are illustrative. They apply the commonly quoted ranges above to three round "clean" values so you can see the scale. They are not valuations of any real car.

Two things stand out. First, the ranges are wide enough that on a £20,000 car the difference between the top and bottom of the Cat S range is £2,000. Where you land inside it is where the real negotiation happens. Second, the cheaper the car, the less the pound figure matters and the more the discount is about risk rather than money. A saving of £800 on a £5,000 car is real, but it will not cover a failed repair.

Why is the discount bigger than the cost of the repair?

Buyers often ask the sensible question: if the car was repaired for £2,000 and drives perfectly, why is it £2,500 or £4,000 cheaper than a clean one? The repair cost is not the whole story. The discount is a market penalty, and it comes from several places at once.

A much smaller pool of buyers. Many private buyers and many franchised dealers will not consider a car with a write-off history, full stop. When demand shrinks, price falls, and it falls whether the car is good or not.

Insurers. Some insurers will not quote at all for a repaired write-off, and others load the premium or restrict cover. The Association of British Insurers (ABI) publishes a code of practice on the categorisation of vehicle salvage that insurers follow, but each insurer decides for itself how to treat a declared write-off at renewal or new business. A buyer who has to phone round for cover, or who pays more once found, will want that cost off the price.

Finance houses. Some lenders will not finance a repaired write-off and dealer forecourt finance is often unavailable on one, so the buyer pool skews to cash buyers and people with an unsecured personal loan already arranged. That alone removes a large slice of the market.

Trade-in refusal. Many dealers refuse a repaired write-off as a part exchange, or will offer a figure well below auction value because they know it will be hard to retail. If you cannot trade the car in, you have to sell privately or take what the trade will pay, and the buyer you are negotiating with knows that.

Residual uncertainty. Even an excellent repair leaves a question mark that cannot be fully answered by inspection. Buyers pay for certainty, and a write-off record takes some of it away.

Stigma, fairly or not. Some buyers simply dislike the idea. That is a feature of the market, and it affects what the next person will pay.

Put together, these effects explain why a car with, say, £1,500 of bodywork repair can sit 15% to 25% below a clean example. The repair is the cause, but the market reaction is the price.

How do I work out a fair price for a specific Cat S or Cat N car?

Use a three-step method rather than picking a number from a headline.

Step 1: Find the clean market value. Look at a good run of similar cars with no write-off history: same model, age, engine, trim, mileage and condition. Use advert listings and a recognised valuation guide, and ignore outliers at either end. The Carhealth report includes a valuation where one is available for the model, which gives you a starting figure to work from. Write down a range, not a single number.

Step 2: Apply the range for the category. Take 10% to 20% off for Cat N, or 20% to 30% off for Cat S. Now you have a window. Anything above the top of the window needs a very good reason.

Step 3: Adjust for the repair and the paperwork. Move up or down inside the window, or even outside it, based on what you can verify:

• Evidence of the repair. Photographs from before, during and after, itemised invoices, and the name of the repairer. A repair by a known bodyshop with a written warranty belongs at the high end.
• An independent inspection. A written report from an engineer or inspection service is far better than the seller's word. Check our guide to what Cat S damage looks like so you know what to ask about.
• MOT history. A clean pass sequence after the repair is good. Advisories about corrosion, uneven tyre wear or structural welding are not.
• Panel gaps, paint and alignment. Mismatched paint, uneven gaps and signs of overspray are signs of a rushed job.
• How the car drives. Tracking straight on a flat road, tyre wear that is even across the tread, no pulling under braking.
• Insurance quote. Get a real quote for the actual car and your details before you agree a price, and take any extra premium off the offer.

If the seller cannot show any of these, move to the bottom of the window and say why.

Does the Cat S or Cat N marker ever go away?

No. A write-off marker is permanent. Once an insurer records the category against the car's registration and VIN, it stays on the record for the life of the vehicle, however well it was repaired and however many owners it has had since. Selling the car, re-registering it or getting a fresh V5C does not remove it. Anyone who tells you the marker "drops off after a few years" is wrong.

What does change is how much it matters. The pound figure is larger on a newer car, where a clean example is easy to find and the clean value is high. On an older car the percentage can be just as big or bigger, but the car's age and mileage are already the main drivers of value, so a ten-year-old Cat N car may be only a few hundred pounds cheaper than a clean one in poor condition. That does not mean the history is irrelevant to the next buyer. It means the car is already cheap enough that the discount is less visible.

Cars that were written off before October 2017 carry the old categories (C and D) rather than S and N. Those cars are older now, but the same principle applies: the record does not expire. Our guide to how the write-off categories work covers the old and new systems side by side.

What will the discount look like when I come to sell?

This is the part many buyers forget to price in. If you pay 20% under clean value for a Cat N car, you are not buying a clean car at a discount. You are buying a car that will be 10% to 20% under clean value on the day you sell it too. The discount is not a gain you keep. It is the price of buying into the same smaller market you will have to sell into.

Three practical consequences:

1. The discount is applied again when you sell. Buyers will value the car against clean examples on the day and knock the same sort of percentage off, so the saving you made is not profit. It is a discount you pass on, minus whatever the repair file lets you claw back.
2. A slower, private sale. Because trade buyers will tend not to take it, plan on selling privately, with patience, and with the repair file ready.
3. Your paperwork matters most at exit. The buyer you meet in three years will ask the same questions you ask now. Keep every photograph, invoice and report from day one, and keep the V5C and service history together.

If you want an idea of how normal depreciation compares, our guide to which cars hold their value best puts the write-off discount in context. A car that holds its value well will still lose that edge once a write-off marker is added.

How should I negotiate as a buyer?

Negotiating a write-off car is easier than negotiating a clean one, because the history gives you a fact to anchor to. You are not haggling over taste. You are pricing a record. For the wider toolkit, see our guide on how to negotiate a used car price. Here is the specific approach for a Cat S or Cat N car.

Before you contact the seller:

• Work out the clean value range and the category window (above).
• Run a history check on the registration so you know what is recorded. If the advert says nothing about a write-off and the record shows one, you have a conversation to have.
• Get an insurance quote for that exact car.

A script you can adapt:

"Thanks for sending the photos. Before we talk about a price, I checked the history and it shows a Cat N write-off in [month, year]. Clean examples of this car are selling for about £X. With a Cat N record, the market normally takes 10 to 20% off that, so I would expect to be around £Y. Can you send me the repair invoices and the before and after photographs? If the repair evidence is strong, I would be happy to go towards the top of that range."

Then do three things:

1. State the fact, not an accusation. The record is the record. You are not saying the seller lied.
2. Name your number and your reason. "£Y because of the category and the clean market value of £X" is hard to argue with.
3. Leave the door open on evidence. Telling the seller that good paperwork moves you to the top of the range gives them a reason to produce it.

If the seller says "it is only Cat N, it makes no difference", that is a negotiating position, not a fact. Ask them whether they would be happy to take the same car in part exchange at clean value.

When to walk away. Leave the deal if the seller refuses to show repair evidence on a Cat S car, will not let an independent inspector look at it, or pushes you to pay a deposit before you have seen the history. A good price does not make up for those.

What should a seller expect?

If you are selling a car with a write-off history, honesty and paperwork are both your best price tools.

• Declare it up front. The buyer will find it, and a seller who raises it first looks trustworthy. A seller who hides it risks the sale and a complaint.
• Price it for the category. Start from the clean market value and apply the range. Pricing a Cat S car as if it were clean will get you phone calls and no offers.
• Build a repair file. Photographs of the damage, invoices, repairer details, any warranty and an engineer's report. A thick file lets you ask for the top of the range and shorten the time to sale.
• Expect mostly cash buyers. Some lenders will not finance a repaired write-off, and trade buyers will tend to offer less than a private buyer will pay.
• Do not expect the marker to disappear. If a buyer runs a history check, it will show.

If you have repaired the car after a claim and want to know what is recorded against it before you advertise, you can check your own car with the same tools a buyer would use. It is better to know now than to find out from a buyer.

Has the car you are looking at actually been written off?

A write-off is not visible on the bodywork, and it is not shown on the free government tools. It is a decision made by an insurer, recorded on the insurance industry's register (MIAFTR) and attached to the car's registration and VIN. The DVLA vehicle enquiry service does not display it, and the MOT history does not either. That is why a car can look spotless, pass an MOT every year and still carry a Cat S marker. Our guide on how to check whether a car has been written off walks through the steps.

The reliable route is a history check by registration. A Carhealth report shows the write-off category and date from insurer records, via Experian, alongside a valuation where one is available for the model. That means you can do the sum on the actual vehicle: take the valuation as your clean-value guide, apply the range for the category, and adjust for what you can verify. The same report shows outstanding finance, the stolen marker, the number of previous keepers, the MOT history and mileage trail from DVSA, open recalls where DVSA holds them, and a Visible Damage Check where the car has photos from earlier sale adverts, so you are not relying on the seller's account of any of it.

If you want to see what a registration returns before you commit to anything, you can start with a free check for the DVLA and DVSA basics; the write-off category and date are in the full report. Whatever you use, run it before you travel to view the car and before you hand over a deposit, not after.

One limit applies. A clean result means no insurance total loss is recorded. It does not prove a car has never been in an accident, because a car that was damaged and repaired privately without an insurance claim has no write-off marker. The physical inspection, the MOT history and the mileage trail still matter.

Frequently asked questions

How much does a Cat S reduce the value of a car?

A Cat S car is commonly priced 20% to 30% below the same car with a clean history. The gap can be wider on older cars with thin repair evidence and narrower on newer cars with a full engineer's report. Because the damage was structural, buyers and trade valuers apply a bigger discount than for Cat N.

How much does a Cat N reduce the value of a car?

A Cat N car is commonly valued 10% to 20% below a clean equivalent. Where the Cat N was caused by theft, flood or cosmetic damage and the repair is well documented, the discount tends to sit at the lower end. Where it followed an accident, expect buyers to push towards the upper end.

Is a Cat S car worth less than a Cat N car?

Yes. Cat S means structural damage, and Cat N means non-structural damage, so the same car will usually be worth more as a Cat N than as a Cat S. Our Cat N versus Cat S comparison sets the two side by side if you are choosing between them.

Will a Cat S or Cat N car lose more value over time?

Not usually. If you bought at the discounted price, the same percentage comes off the clean value when you sell, so in percentage terms your depreciation is similar to a clean car's. The extra loss was taken by whoever owned the car when it was written off. As the clean value falls with age, the pound size of the discount shrinks, even though the marker stays on the record.

Can I get the marker removed after a good repair?

No. The write-off category stays on the insurance record for the life of the car. A good repair, a fresh MOT or a new V5C does not remove it. What a good repair does is support a price near the top of the range, because you can show the work was done properly.

Do dealers pay less for Cat S and Cat N cars?

Yes, in most cases. Many dealers will not take a repaired write-off as a part exchange, and those that do usually offer well below the clean trade value because the car is harder to retail and cannot easily be sold with finance. If you want the best price, expect to sell privately and keep a full repair file.