A car category check reveals whether a UK vehicle has been declared an insurance write-off, and if so, which category it was assigned. When an insurer decides that repairing a vehicle is either unsafe or uneconomical, they classify it using one of four categories — A, B, S, or N — each of which has different implications for the car's roadworthiness, legal status, insurance costs, and resale value.
The DVLA's free vehicle enquiry service does not show write-off category information. To check a car's category reliably, you need a history check that draws on insurance industry databases — specifically the MIAFTR (Motor Insurance Anti-Fraud and Theft Register) — which is where insurers record write-off decisions. Our check searches this data by registration number and returns any category recorded against the vehicle, along with the rest of the car's history.
This matters more than many buyers realise. According to data published by carVertical, one in six used cars on UK roads has previously been written off or badly damaged, and 86 per cent of those were formally declared write-offs by insurers. A car is written off in the UK roughly every 90 seconds. Buying without checking is a significant financial risk — a Cat S vehicle can be worth 20 to 40 per cent less than an equivalent undamaged car, even after professional repair, because the write-off marker remains on the vehicle's record permanently.
We search the MIAFTR and related insurance industry records — the same databases that insurers use — to return any write-off category recorded against the registration. The DVLA alone cannot provide this information.
Our check covers all current UK write-off categories — Cat A, Cat B, Cat S, and Cat N — as well as the older Cat C and Cat D classifications still carried by vehicles written off before October 2017.
A write-off category permanently reduces a vehicle's market value, even after expert repair. Our check gives you the information you need to negotiate accurately — or walk away with confidence.
Enter any UK registration number and receive category status data in seconds. No paperwork, no VIN required. Check before you travel to view the car, agree a price, or hand over a deposit.
Since October 2017, UK insurers have used four categories to classify written-off vehicles, following an update to the Association of British Insurers' salvage code. The change was introduced to place greater emphasis on structural safety rather than repair costs alone. If you are buying a used car, here is what each category means in practice.
Category A is the most severe classification. A Cat A vehicle has sustained catastrophic damage — typically from a severe collision, fire, or flooding — to the point where neither the car nor any of its individual parts can be safely salvaged. Cat A vehicles must be crushed entirely. They cannot be repaired, resold, or stripped for parts. The vehicle identification number is removed before crushing to prevent the identity being fraudulently transferred to another car. If a category check returns a Cat A result, you should not proceed with the purchase under any circumstances.
Category B vehicles are also beyond repair for road use, and the body shell must be crushed. However, unlike Cat A, undamaged components — such as the engine, gearbox, and electrical parts — can be removed and resold before the shell is destroyed. Cat B cars are often bought by breakers' yards, which strip usable parts before disposal. A vehicle with a Cat B marker cannot legally be returned to the road in any form. Again, if a check returns Cat B, walk away.
Category S (formerly Category C) applies to vehicles that have sustained structural damage — such as to the chassis, crumple zones, or suspension — but where professional repair and return to the road is possible. Insurers write these vehicles off because the repair cost is uneconomical relative to the vehicle's value, not because repair is impossible. A Cat S vehicle can legally be driven again, but only after specialist repair and re-registration with the DVLA. The insurer is legally required to submit a Form V23 to the DVLA when a vehicle is categorised as Cat S. Cat S vehicles typically sell for 20 to 40 per cent less than undamaged equivalents.
Category N (formerly Category D) covers vehicles with non-structural damage, such as cosmetic bodywork problems, electrical faults, airbag deployment, or mechanical component damage that does not affect the chassis or frame. Cat N vehicles can be repaired and returned to the road without DVLA re-registration, making them a more common sight in the used car market. However, the write-off marker remains permanently on the vehicle's history, which affects insurance costs and resale value. You must inform your insurer if you own or purchase a Cat N vehicle.
Before October 2017, UK insurers used a different system with four categories: A, B, C, and D. Categories A and B remain unchanged. Categories C and D were replaced by S and N respectively. If you are buying a vehicle that was written off before October 2017, you may still encounter Cat C or Cat D on its history record — these markers remain permanently and are not updated to the newer classification.
Category C meant that the vehicle's repair cost exceeded its market value, and structural damage was often — though not always — a factor. Like Cat S today, Category C vehicles could legally be repaired and returned to the road, but required DVLA notification and re-registration.
Category D was the least severe of the old write-off classes and covered vehicles that were uneconomical to repair but did not necessarily have structural damage. Category D is broadly equivalent to today's Category N. Cat D vehicles could be repaired and driven without re-registration, and many that were written off as Cat D in the early 2010s are still on the road today.
The reason the ABI updated the categories was specifically to shift focus from repair economics to structural safety. Under the old system, a vehicle could be given a Cat C label primarily because parts were expensive, even if the structure was sound. The newer system makes the distinction clearer: S is always structural, N is always non-structural. When running a category check, our report will flag whichever classification system applies to the vehicle, so you always know exactly what you are looking at.
Cat S and Cat N vehicles are legally sold in the UK every day, and many represent genuine value for buyers who understand what they are purchasing. However, going in without the full picture is where buyers get into difficulty. Here is a practical guide to assessing whether a category vehicle is worth buying.
The first question is always whether the repair has been done — and done properly. A Cat S vehicle that has been professionally repaired to a roadworthy standard, with documentation to prove it, is a very different proposition to one where the repair quality is unknown. Ask the seller for the repair invoice, any engineer's report, and the updated V5C logbook. For Cat S vehicles, confirm that DVLA re-registration has been completed, as this is a legal requirement. If the seller cannot produce these documents, that is a significant warning sign.
Price is the other central consideration. Cat S and Cat N vehicles carry a permanent write-off marker on their records, and this suppresses their market value even after full repair. A Cat S car typically sells for 20 to 40 per cent less than a comparable undamaged vehicle of the same age, mileage, and specification. If the asking price does not reflect this discount appropriately, either the seller is unaware of the category status — which itself raises concerns — or they are hoping the buyer is. Run our check before viewing so you know the category before any price negotiation begins.
Insurance is the third factor many buyers overlook until it is too late. Some insurers charge significantly higher premiums for category vehicles, while others will decline to cover them at all. Cat S cars are particularly affected because the structural damage history creates uncertainty about repair quality. Before committing to a purchase, contact your insurer and confirm they will provide cover, and at what premium. Factoring in the increased insurance cost is essential to working out whether the deal actually represents value.
Cat A and Cat B vehicles are straightforward: do not buy them. They cannot be legally repaired or returned to the road. If a seller is offering a Cat A or Cat B vehicle for road use, that is illegal and you should not proceed.
There are four active write-off categories in the UK: Category A, Category B, Category S, and Category N. Cat A vehicles must be completely crushed — not even individual parts can be salvaged. Cat B vehicles must also have their body shell crushed, though undamaged components can be removed and resold first. Cat S vehicles have sustained structural damage but can be professionally repaired and re-registered for road use. Cat N vehicles have non-structural damage and can be repaired and driven again without DVLA re-registration. The current four-category system replaced the older Cat C and Cat D classifications in October 2017, following a review by the Association of British Insurers.
Enter the vehicle registration number into our car category check tool above. We search insurance industry databases — including the MIAFTR (Motor Insurance Anti-Fraud and Theft Register) — as well as DVLA and salvage records, to return any write-off category recorded against that vehicle. The DVLA's free vehicle enquiry service does not include write-off category data, which is why a dedicated history check is the only reliable way to confirm a vehicle's category status before buying.
Yes, a Category N car can legally be driven once it has been properly repaired to a roadworthy standard. Unlike Cat S, Cat N vehicles do not require DVLA re-registration before returning to the road. That said, you must inform your insurer of the write-off status before driving the vehicle — failing to do so can invalidate your policy. It is also worth having the car independently inspected to confirm the quality of any repairs, particularly if the seller cannot provide documentation.
Yes, but a Category S car must be professionally repaired and formally re-registered with the DVLA before it can legally return to the road. The insurer is legally required to submit a Form V23 to the DVLA at the time of categorisation. Because Cat S involves structural damage to the chassis, crumple zones, or frame, the repair must be carried out by qualified professionals — not a DIY job — and the updated V5C logbook should reflect the vehicle's write-off status. An independent inspection before purchase is strongly advisable.
The essential difference is structural versus non-structural damage. Cat S (formerly Category C) means the vehicle's structural components — such as the chassis, crumple zones, or suspension mounting points — were damaged. This requires specialist repair and DVLA re-registration before the car can legally be driven. Cat N (formerly Category D) means the damage was non-structural — typically cosmetic bodywork, electrical systems, airbags, or mechanical components that do not affect the car's frame. Cat N vehicles do not require re-registration, though insurers must still be informed. Both categories carry a permanent marker on the vehicle's history record that affects value and insurance costs.
Cat C and Cat D were the write-off classifications used in the UK before October 2017 and are broadly equivalent to today's Cat S and Cat N respectively. They are still highly relevant because any vehicle written off before that date will carry a Cat C or Cat D marker on its history record permanently — it does not get updated to the newer system. If you are buying a used car more than a few years old, there is a reasonable chance it could carry one of these older categories, which is why our check covers both the current and legacy systems. A Cat C or Cat D result should be evaluated with the same care as Cat S or Cat N.
Yes, almost always. Many insurers charge higher premiums for Cat S and Cat N vehicles, and some will refuse to provide cover for them at all — particularly for Cat S cars where structural damage has been involved. You must disclose a vehicle's write-off status to your insurer when arranging cover; failing to do so can invalidate the policy entirely. Before purchasing a category vehicle, it is worth contacting your preferred insurer to confirm they will cover it and at what premium. For some buyers, the increased ongoing insurance cost can offset the savings made on the purchase price.
Yes, significantly and permanently. A Category S vehicle typically sells for 20 to 40 per cent less than an equivalent undamaged car of the same make, model, year, and mileage. Cat N vehicles also attract a discount, though usually a smaller one than Cat S. Crucially, the write-off marker never disappears from the vehicle's history record, even after expert repair. This means the depreciation impact is permanent — when you come to sell the car in future, the category status will still be visible to any buyer who runs a check, which will be factored into any offer you receive.