Introduction
Hearing that your car has been "written off" can feel final and confusing in equal measure. In reality, a write-off category tells you a great deal about what happens next, from whether the car can ever return to the road to how your settlement is likely to be calculated.
This guide explains the four UK write-off categories, what to expect from the settlement process, and what to check if you're considering buying a previously written-off car. It pairs well with our guides on car insurance claims and comprehensive car insurance.
Key Terms Explained
- Write-Off (Total Loss)
- A vehicle declared uneconomical to repair or too severely damaged for safe repair, categorised under the UK's ABI system.
- Category A
- The most severe classification, requiring the vehicle and parts to be crushed, with no components reusable.
- Category B
- The vehicle's body shell must be crushed, though some individual parts may be salvaged.
- Category S
- Structurally damaged but repairable, and legally able to return to the road once properly repaired and inspected.
- Category N
- Non-structural damage, repairable, and generally the least severe of the four categories.
- Pre-Accident Market Value
- The estimated value of the vehicle immediately before the damage occurred, used as the basis for settlement offers.
The Four UK Write-Off Categories
A car is generally declared a write-off, or total loss, when the cost of repairing it is uneconomical relative to its value, or when the damage is so severe that safe repair isn't possible. Insurers use a standardised categorisation system to record the extent and nature of the damage.
| Category | Meaning | Can It Return to the Road? |
|---|---|---|
| Category A | Vehicle and parts must be crushed, cannot be reused | No |
| Category B | Body shell must be crushed, some parts may be salvaged | No |
| Category S | Structurally damaged but repairable | Yes, if properly repaired and inspected |
| Category N | Non-structural damage, repairable | Yes, if properly repaired |
These categories replaced the older Category C and D system in 2017, with Category S broadly replacing C and Category N broadly replacing D, alongside the newer A and B categories for the most severely damaged vehicles.
Common Situations
Keeping Your Written-Off Car
In some cases you can keep your car after it's declared a write-off, by agreeing a reduced settlement that accounts for the vehicle's salvage value, though this depends on the category and your insurer's specific policy on retained salvage.
Outstanding Finance
If you still owe money on a finance agreement, the settlement may go towards paying off the finance first, with any remaining balance paid to you. If the settlement is less than the outstanding finance, you may be liable for the shortfall unless you have gap insurance.
Category N Isn't Always Severe
Category N covers non-structural damage, which can range from relatively minor cosmetic issues to significant but non-structural repairs, so the category alone doesn't tell you the full extent of the damage.
Insuring a Repaired Write-Off
Previously written-off vehicles, even once properly repaired, can sometimes be more difficult or expensive to insure, as some insurers view them as higher risk. It's worth disclosing the vehicle's history and comparing quotes from insurers experienced in covering repaired vehicles.
What Happens If Your Car Is Written Off
Your insurer will typically offer a cash settlement based on the vehicle's pre-accident market value, sometimes referred to as its "actual cash value", taking into account its age, mileage, condition and comparable vehicles for sale.
How Insurers Actually Reach a Valuation
Insurers typically use one or more specialist trade valuation guides to identify an indicative market value, the same guides referenced by the Financial Ombudsman Service when it reviews disputed valuations. Where guides differ significantly, the Financial Ombudsman's own published approach is to rely on the highest value shown across the guides, unless the insurer can support a different figure with other evidence.
Adverts Are Now Accepted as Evidence
The Financial Ombudsman Service has previously been cautious about using online adverts to assess a fair valuation, on the basis that advertised prices don't always reflect what a vehicle actually sells for. However, having been told by the valuation guides themselves that vehicles are now typically selling at or close to their advertised price, the Ombudsman now typically does consider adverts as part of its assessment, provided they closely match your vehicle's specification, mileage and age.
Deductions You May See, and Whether They're Fair
Insurers may reduce a valuation below guide price for reasons including pre-existing damage, a left-hand-drive configuration, or the vehicle having previously been written off. The Financial Ombudsman's published approach is that any deduction should be evidenced and specific to your vehicle, not a standard blanket percentage applied regardless of individual circumstances; a deduction for wear and tear that would reasonably be expected for a vehicle of that age and mileage, for example, isn't considered fair, since guide prices already reflect this.
The FCA's Review of How Insurers Value Written-Off Cars
In 2024, the Financial Conduct Authority published the findings of a multi-firm review specifically examining how insurers value stolen and written-off vehicles, covering firms representing an estimated 70% of the market. The review was prompted by evidence that some customers were being offered settlement values lower than a fair estimate of their vehicle's market value, and the findings, last updated by the FCA in December 2025, remain directly relevant to how total-loss claims are handled today.
Firms Must Handle Claims Promptly and Fairly
The FCA's starting point is straightforward: insurers must handle claims promptly and fairly under rule ICOBS 8.1.1R, and, since July 2023, the Consumer Duty requires firms to act in good faith and deliver good outcomes for customers. The FCA was explicit that where a firm knowingly makes settlement offers below the value a customer is entitled to under their policy, this is likely to breach both requirements.
Low Initial Offers, Expecting a Challenge
One of the review's clearest findings was that some firms would sometimes make an initial settlement offer below their own best estimate of the vehicle's market value, on the basis that they would increase it later if the customer challenged or complained. The FCA considered this can lead to systematically worse outcomes for customers who are less likely to challenge or negotiate, including potentially vulnerable customers, and said this approach can be unfair.
Standard Deductions Without Individual Assessment
The review also found that many firms applied a standard 20% deduction to the settlement value whenever a vehicle had previously been written off in any category, regardless of the category or the individual circumstances. The FCA noted that while structural Category S losses are likely to have a genuine, lasting effect on value, this is less clearly true for non-structural Category N losses, and applying the same blanket deduction to both may not always be fair.
What Happens to Your Remaining Premium Payments
The review also looked at what happens to a monthly-paying customer's policy after a total loss. It found that around half of the firms reviewed deducted all remaining monthly instalments from the settlement payment in one lump sum, rather than allowing the customer to continue paying monthly for the rest of the term. The FCA flagged this as a potential risk to good customer outcomes, since it can leave a customer with less cash than expected at exactly the moment they need to fund a replacement vehicle.
Challenging a Settlement Offer
- Review the settlement basis carefully. Ask which valuation guide or guides were used, and confirm what comparable vehicles were considered.
- Gather your own evidence. Current adverts for closely matching vehicles are now accepted evidence by the Financial Ombudsman Service, alongside an independent engineer's report for higher-value or unusual vehicles.
- Query any deduction specifically. Ask for the evidence behind any reduction for pre-existing damage, wear and tear, or previous write-off history, rather than accepting a blanket percentage.
- Submit a formal challenge to your insurer. Most have a defined valuation review process, and firms should meaningfully consider any additional information you provide.
- Escalate if unresolved. The Financial Ombudsman Service can review unresolved disputes and, if it agrees your insurer's valuation is unfair, can direct the insurer to increase it, potentially with interest added.
- Factor in gap insurance if applicable. This can cover any shortfall against outstanding finance.
Agreed-Value Policies, Modified Cars and New-for-Old Replacement
Agreed-Value Policies
Some policies, typically for classic, modified or high-value vehicles, are written on an "agreed value" basis, where you and your insurer settle on a specific value when the policy starts, rather than it being assessed at the time of a claim. Where a genuinely agreed-value policy is in place, the Financial Ombudsman's expectation is that the insurer pays the amount that was agreed, not a value reassessed at claim time.
Modified Vehicles
If your car has been modified, don't assume this automatically increases your settlement. Many modifications and optional extras, such as satnav systems or upgrades needed simply to keep a vehicle roadworthy, have little effect on second-hand value compared with standard guide prices. More visually distinctive modifications, such as spoilers or performance exhausts, can appeal to some buyers and put others off, meaning the overall effect on market value is often smaller than owners expect, unless the vehicle is specifically insured on an agreed-value basis that already accounts for this.
Left-Hand-Drive and Imported Vehicles
Left-hand-drive vehicles are generally worth less on the UK market, so a deduction from market value guide prices for this is normally considered fair, provided your insurer can support it with evidence. The same generally applies to imported right-hand-drive vehicles that differ from UK-market specification.
New Vehicle Replacement Policies
Some policies for newer cars promise a brand new replacement vehicle, rather than a cash settlement, if the car is written off within a set period, typically where repair costs would exceed 60% to 70% of the current list price. If you have a Personal Contract Purchase (PCP) or hire purchase agreement, your insurer should still generally provide a new vehicle replacement if this was agreed with the finance company, even though the finance company technically owns the car until the final payment is made.
If Your Vehicle Is Scrapped Without Your Consent
Once you've accepted a settlement for the full market value of a written-off vehicle, your insurer typically becomes the legal owner of the salvage. However, the Financial Ombudsman Service doesn't consider it fair for an insurer to scrap your vehicle without telling you first, particularly if you wanted to keep the car or its salvage, or if personal belongings were left inside it.
If your insurer pays out the market value but you want to keep the damaged vehicle rather than hand it over, most will allow this, but will typically deduct an amount reflecting what they would have received for selling the salvage themselves. If this happens, you're entitled to ask for evidence supporting the amount deducted.
Buying or Insuring a Repaired Write-Off
Category S and N vehicles can be legally repaired and put back on the road, but should always be professionally inspected, and their write-off history should be disclosed when sold. Buyers should always check a vehicle's history before purchase, using a vehicle history check to confirm write-off category history alongside other records like outstanding finance, to understand whether a car has previously been written off before committing to buy.
Common Mistakes to Avoid
- Accepting a settlement offer without checking comparable vehicle values
- Assuming Category N always means minor damage
- Not checking for outstanding finance before agreeing settlement
- Buying a repaired write-off without a vehicle history check
- Not disclosing write-off history when selling a repaired vehicle
- Assuming gap insurance applies automatically without checking your policy
Frequently Asked Questions About Write-Off Categories
What does Category S mean?
Category S means the vehicle suffered structural damage but can be repaired and legally returned to the road, subject to proper repair and inspection.
Can a Category A or B car be put back on the road?
No. Category A and B vehicles must be crushed and cannot legally return to the road.
How much compensation will I get if my car is written off?
Typically the vehicle's pre-accident market value, based on comparable vehicles, age, mileage and condition, though this can be a source of dispute if you feel the valuation is too low.
Is it safe to buy a car with write-off history?
It can be, provided the vehicle has been properly repaired and inspected, particularly for Category S and N vehicles, but always check the vehicle's history and consider a professional inspection first.
What happened to Category C and D?
These were replaced in 2017 by Category S (structural damage, repairable) and Category N (non-structural damage, repairable) respectively, alongside Category A and B for non-repairable vehicles.
Can I keep my car if it's declared a write-off?
In some cases yes, by agreeing a reduced settlement that accounts for the vehicle's salvage value, though this depends on the category and your insurer's policy.
Does a Category N write-off always mean serious damage?
Not necessarily, Category N covers non-structural damage, which can range from relatively minor cosmetic issues to significant but non-structural repairs.
Will insuring a Category S or N car always cost more?
Often yes, since some insurers view repaired write-offs as higher risk, though pricing varies and specialist insurers may offer more competitive terms.
How do I check if a car I'm buying has a write-off history?
A vehicle history check, available from several providers, will reveal write-off category history alongside other records like outstanding finance.
Can gap insurance help if my settlement doesn't cover outstanding finance?
Yes, gap insurance is specifically designed to cover the shortfall between a write-off settlement and any outstanding finance balance.
Has the FCA looked into how insurers value written-off cars?
Yes. The FCA published a multi-firm review in 2024, reviewing insurers covering around 70% of the market, and found some firms were making initial settlement offers below a fair estimate of market value, on the expectation customers would negotiate. The FCA said this practice can breach the requirement to handle claims promptly and fairly.
What happens to my monthly car insurance payments if my car is written off?
Some insurers deduct the rest of your policy's instalments from your settlement in one go, rather than letting you continue paying monthly, which the FCA has flagged as a possible risk to fair customer outcomes since it can leave people short of funds for a replacement vehicle. Check your insurer's approach if you pay monthly.
Does a previous write-off automatically reduce a car's value by 20%?
Many insurers apply a standard 20% deduction if a vehicle was previously written off in any category, but the FCA has said blanket deductions without considering individual circumstances, particularly for non-structural Category N losses, may not always be fair.
Conclusion
Understanding the UK's write-off categories helps you know what to expect if your car is ever declared a total loss, and what to check if you're considering buying a previously written-off vehicle. If your car is written off, review your settlement offer carefully and don't hesitate to challenge a valuation you believe is too low.