Every 60 seconds, a car is written off by an insurer in the UK. In 2024 alone, 562,185 vehicles were recorded as written off, according to DVLA data obtained through a Freedom of Information request. Many of these cars are repaired and returned to the used car market, sometimes without any mention of their history in the listing.
If you are buying a used car, understanding write-off categories helps you spot risk before you hand over any money. This guide explains what each category means, how write-offs affect insurance, and how to check whether a car you are looking at has ever been written off.
Check any car's write-off history before you buy
A Brumble Premium Vehicle Report searches the Motor Insurance Anti-Fraud and Theft Register (MIAFTR) for write-off markers, outstanding finance, stolen status, and more. Reports start from £9.99.
When an insurer decides that repairing a damaged car would cost more than the car is worth, or that the damage makes it unsafe to repair, the car is declared a write-off. The insurer pays the owner a settlement based on the car's market value before the damage happened, then assigns the vehicle a category.
The UK uses four write-off categories, set by the Association of British Insurers (ABI) under their Code of Practice for the Categorisation of Motor Vehicle Salvage. The current system came into effect on 1 October 2017, replacing the older Cat C and Cat D classifications.
| Category | What it means | Can it return to the road? | Parts salvageable? |
|---|---|---|---|
| Cat A | The most severe. The entire vehicle must be crushed. | No, never | No |
| Cat B | The body shell must be destroyed, but mechanical parts may be recovered and resold. | No, never | Yes (non-structural parts only) |
| Cat S | Structural damage (chassis, crumple zones, pillars, suspension mountings) that can be repaired. | Yes, after repair and DVLA re-registration | Yes |
| Cat N | Non-structural damage (body panels, electronics, airbags, lighting) that can be repaired. | Yes, after repair | Yes |
Cat A and Cat B vehicles cannot legally return to the road. If someone tries to sell you a Cat A or Cat B car for road use, walk away.
Cat S and Cat N are the categories most buyers will come across. Both can be repaired and driven again, but there is an important difference. Cat S means the car's structural frame was damaged. This includes the parts designed to protect you in a crash, such as the chassis, crumple zones, and roof pillars. Cat N means the damage did not affect the structure, but may still have been significant. Deployed airbags, faulty electronics, and damaged braking components can all result in a Cat N classification.
Before October 2017, insurers used Cat C and Cat D instead of Cat S and Cat N. The old system was based on whether the repair cost exceeded the car's value, rather than whether the damage was structural. Cat C is broadly equivalent to today's Cat S, and Cat D is broadly equivalent to Cat N. If you see a Cat C or Cat D marker on an older vehicle, treat it the same way you would Cat S or Cat N.
Any write-off marker, whether old or new, stays on the vehicle's record permanently. It cannot be removed.
A previously written-off car will typically cost less than an equivalent vehicle with a clean history. That discount can be tempting, but it comes with trade-offs that are worth understanding before you commit.
None of this means you should never buy a Cat S or Cat N car. It means you should check the car's full history before making a decision, so you know exactly what you are dealing with.
A Brumble Premium Vehicle Report tells you whether a car has ever been written off, what category it was assigned, whether it has outstanding finance, whether it has been reported stolen, and more. You can also see a sample report to check exactly what is included.
A seller is not always required to tell you about a car's write-off history. Dealers have a legal obligation to disclose it, but private sellers do not. This means the only reliable way to know for certain is to check the car yourself before buying.
Start with the Brumble MOT Checker, which pulls the full MOT history from the DVSA. While this does not show write-off status directly, it can flag signs of past damage. Look for gaps in the MOT timeline, a sudden cluster of advisory notices related to structural components, or a change of testing station that coincides with other unusual patterns.
Ask for repair invoices, photographs of the damage and the completed repair, and the name of the garage that carried out the work. A reputable seller should be willing to share this. If they cannot or will not provide documentation, that is worth noting.
A Brumble Premium Vehicle Report searches the Motor Insurance Anti-Fraud and Theft Register (MIAFTR) for any recorded write-off marker against the vehicle. MIAFTR is the centralised database maintained by the Motor Insurers' Bureau where all insurer write-offs are recorded. Once a marker is added, it stays permanently. The report also checks for outstanding finance, stolen status, mileage discrepancies, and other issues that a visual inspection would not reveal.
For Cat S vehicles in particular, consider paying for an independent vehicle inspection before completing the purchase. A qualified engineer can assess whether structural repairs have been carried out to an acceptable standard. This is especially important if you are spending a significant amount on the car.
Can you check for free? The Brumble MOT Checker is free and can flag signs of past damage through MOT history gaps and advisory patterns. The Brumble Tax Checker confirms whether a car is taxed and has a valid MOT. However, neither free tool can confirm write-off status. The free DVLA vehicle enquiry on GOV.UK does not show it either. Only a full vehicle history check that searches MIAFTR can confirm whether a car has been recorded as a write-off.
Yes, a write-off marker can affect your insurance, though the impact varies between insurers.
You must declare a car's write-off history to your insurer. If you do not disclose it and later need to make a claim, your insurer could refuse to pay out or cancel your policy. The write-off marker is permanently recorded on insurance databases, so your insurer is likely to find out regardless.
Cat S car insurance is available from most mainstream insurers, but premiums may be higher than for an equivalent vehicle with a clean history. Some insurers may ask additional questions about the nature of the structural repairs before offering a quote, and a small number may not offer cover at all. If you are considering buying a Cat S car, it is worth getting insurance quotes before you commit to the purchase so you know what the cover will cost.
Cat N car insurance tends to be easier to arrange than Cat S, because the damage did not involve the vehicle's structure. However, premiums may still be slightly higher than for a car with no write-off history. Fewer insurers decline Cat N cover outright compared to Cat S.
Whether you are looking at a Cat S or Cat N vehicle, you can compare car insurance quotes via Brumble to see what cover is available and what it might cost for a previously written-off car.
No. Once a write-off category has been recorded against a vehicle on MIAFTR, it cannot be removed. This applies regardless of how well the car has been repaired, how much money has been spent on the repair, or how long ago the write-off happened.
The marker stays on the vehicle's record for its entire life. Any future vehicle history check will show it. This is one of the reasons why previously written-off cars sell for less than equivalent vehicles with a clean record.
Be cautious of anyone who claims they can remove a write-off marker or "clean" a car's history. This is not possible through any legitimate process.
If your insurer writes off your car after an accident, the process typically works like this:
If you believe the settlement offer is too low, you can challenge it. Gather evidence of comparable cars for sale at higher prices and submit this to your insurer's valuation team. If they reject your challenge, you can escalate to the Financial Ombudsman Service.
For Cat S and Cat N write-offs, you may have the option to buy back the vehicle from your insurer and arrange repairs yourself. The buyback price is typically a fraction of the car's pre-accident value.
If your car is on finance when it is written off, the settlement money goes to the finance company first. If the settlement is less than the remaining balance, you may still owe the difference. This is where GAP insurance can help, if you have it. For more on how car finance works, see our car finance guide.
A Brumble Premium Vehicle Report checks write-off status, outstanding finance, stolen markers, mileage history, and more. It takes less than a minute and reports start from £9.99.
Since 2017, the DVLA has added a salvage marker to the V5C (logbook) of vehicles that have been written off and re-registered. However, not all previously written-off vehicles will have this marker, particularly those written off before the system was introduced. A vehicle history check is the most reliable way to confirm write-off status.
Cat N cars sell for less because the write-off marker is permanent and affects resale value, some buyers are put off by any write-off history, and insurance may cost slightly more. The discount reflects these factors, not necessarily the current condition of the car.
Cat S involves structural damage, which is generally considered more serious than the non-structural damage covered by Cat N. Structural repairs affect the parts of the car designed to protect you in a crash, so the quality of those repairs matters more. Cat S vehicles also require DVLA re-registration before they can return to the road, while Cat N vehicles do not.
Cat D was the old equivalent of Cat N (non-structural damage), while Cat S covers structural damage. In that sense, Cat D generally indicates less severe damage. However, the old categories were based on repair cost rather than damage type, so a Cat D car may still have had significant issues. Always run a vehicle history check regardless of which category marker you see.
Yes. You must declare any write-off history to your insurer, whether it is Cat S, Cat N, or one of the older categories. Failing to declare it could invalidate your policy and leave you uninsured.
A manufacturer warranty may be affected by a write-off, particularly if the damage involved structural components. It depends on the terms of the specific warranty. If you are buying a Cat S car that still has a manufacturer warranty, it is worth checking with the manufacturer directly before assuming the warranty will transfer.
The free DVLA vehicle enquiry shows tax and MOT status but does not confirm write-off history. The free Brumble MOT Checker can flag signs of past damage through MOT advisories and test history gaps, but only a full vehicle history check that searches MIAFTR can confirm whether a car has been recorded as a write-off.
MIAFTR is the Motor Insurance Anti-Fraud and Theft Register, a centralised database maintained by the Motor Insurers' Bureau. It holds records of vehicles that have been written off or reported stolen across the UK. Once a write-off marker is recorded on MIAFTR, it remains against the vehicle permanently. A Brumble Premium Vehicle Report searches MIAFTR as part of the check.
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