Insurer Undervalued Your Written-Off Car? How to Challenge It
When your car is written off, your insurer must pay you its 'market value', what it would cost to replace with a comparable vehicle just before the loss. Insurers routinely make a first offer that's lower than the true market value, often leaning on a single trade guide. You don't have to accept the first figure. With the right evidence you can push back, and if they still won't pay a fair amount you can take it free to the Financial Ombudsman Service, which has been firmly critical of lowball valuations.
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Build my claim →Your rights
Your policy entitles you to the car's market value at the time of loss, defined by the Financial Ombudsman Service as the cost of replacing it with one of the same make, model, specification, age, mileage, and condition immediately before the loss. The Financial Conduct Authority warned insurers in December 2022 not to undervalue vehicles when settling claims. Its 2024 multi-firm review found some firms offered less than a vehicle's fair market value, only increasing offers when customers complained. The Financial Ombudsman Service's long-standing approach is that insurers should not simply pick the lowest trade guide. The FOS expects insurers to consider leading motor trade guides (such as Glass's, CAP and Percayso/Autotrader-type valuations) and, where guides differ significantly, to rely on the highest valuation unless there is good evidence-based reason not to. Advertised prices for genuinely comparable vehicles are strong supporting evidence. You complain first to the insurer. If they do not resolve it within 8 weeks, or if you are unhappy with their final response, you can refer it free to the FOS. The insurer must send a final response within 8 weeks. If they need more time, they must explain why and tell you about your right to go to the FOS. If you receive a final response, you generally must refer your complaint to the FOS within 6 months of the date it was sent. The final response must state this 6-month time limit. The FOS can order the insurer to increase the payout and add 8% simple interest for the delay.
Step by step
- 1Do not accept the first offer. Ask the insurer in writing to explain exactly how they calculated the figure and which trade guides and valuations they used.
- 2Build your own evidence. Print adverts for the same make, model, age, mileage, specification, and condition currently for sale. Run valuations on the main motor trade guides. Keep dated copies. Aim to show the realistic replacement cost just before the write-off.
- 3Submit a written complaint setting out your evidence and the fair market value you believe applies. Reference the FCA's warning on fair value and the Ombudsman's approach of not relying on the lowest guide. Request an increased settlement.
- 4If the insurer does not resolve your complaint within 8 weeks, or if you are unhappy with their final response, you can refer it free to the Financial Ombudsman Service.
- 5If you receive a final response, you generally must refer your complaint to the FOS within 6 months of the date it was sent. Attach all your comparable adverts and guide valuations.
What they'll say, and your comeback
“Our valuation is based on our trade guide, so it's final.”
Comeback, A single trade guide isn't conclusive. The Financial Ombudsman expects insurers to consider all the leading guides and, where they differ significantly, to rely on the highest figure unless there's good evidence-based reason not to. I've provided comparable adverts showing a higher market value.
“Advertised prices are just asking prices, not real values.”
Comeback, The market value is what it would cost me to replace the car like-for-like, and the cars actually for sale are the market I'd have to buy from. The Ombudsman treats genuinely comparable adverts as strong evidence of fair value, especially where they exceed your guide figure.
“We've deducted for condition and mileage, so the lower figure stands.”
Comeback, Any deduction must be justified with evidence, not applied as a blanket reduction. If you're reducing the payout below the guide and advert figures, you need to show specific, documented reasons. Otherwise the deduction is unfair and I'll ask the Ombudsman to review it.
What actually happens
In practice, many consumers find their initial write-off offer is indeed low. Insurers are required to respond to complaints within 8 weeks, and often an improved offer comes during this internal complaint stage, especially when presented with strong evidence like comparable adverts and multiple trade guide valuations. If the insurer still undervalues the car, referring the case to the Financial Ombudsman Service is the next step. The FOS aims to resolve cases fairly, often leading to increased payouts. While the FOS process can take several months, successful complaints typically result in the insurer being ordered to pay the difference, plus 8% simple interest for the delay. The key is persistent, evidence-based communication, first with the insurer, then with the FOS if needed.
FAQ
Can I still drive a hard bargain if I've already accepted the offer?
It's harder once you've accepted, but not always impossible, especially if you accepted under pressure or without the information to judge it. Raise a complaint quickly explaining why the settlement was unfair, and the Ombudsman can still consider it within the time limits.
What evidence carries the most weight?
Adverts for genuinely comparable vehicles (same model, year, mileage, spec and condition) on sale around the date of loss, plus valuations from several leading motor trade guides. The closer the match, the stronger your case for a higher payout.
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Sources
A self-serve tool, not a law firm. General information, not legal advice. Last researched 2026-09-24.