How to complain to your insurer (and get a final response)

If your home insurance claim has been rejected, underpaid, or left to drift, a formal complaint is more than a way to vent. It is the legal gateway to the Financial Ombudsman Service and, often, the point where insurers take a fresh look at a bad decision. Insurers resolve a large share of complaints in the policyholder's favour before the ombudsman ever sees them, because a well-built complaint gets reviewed by different people, under regulatory deadlines, with the ombudsman's uphold statistics in view.

When you have a complaint (and not just a question)

The FCA defines a complaint broadly: any expression of dissatisfaction about a financial service, whether or not you use the word "complaint". In practice, you have a complaint worth formalising when:

• your claim has been declined and you think the reason does not hold up (see what to do when a claim is rejected)
• the settlement offer is lower than your actual cost to repair or replace (see challenging a low offer)
• the claim is taking unreasonably long with no clear explanation (see your rights on delays)
• you were given wrong or misleading information during the claim

A phone call asking your claims handler to reconsider is a question. A written complaint to the complaints team is a regulatory event with a clock attached. If you mean it, put it in writing and call it a complaint.

Where to send it

Do not rely on your claims handler to escalate for you. Every FCA-regulated insurer must publish a complaints procedure; it is on their website and usually in your policy booklet. Send your complaint:

• to the complaints department, by email or letter (keep a copy)
• quoting your policy number and claim reference
• with "Complaint" in the subject line, so there is no ambiguity about when the clock started

The 8-week deadline runs from the day the insurer receives your complaint, wherever in the organisation it lands. But addressing it correctly avoids days lost in internal forwarding and produces a clean paper trail.

What a strong complaint contains

The ombudsman's own data shows why structure matters: buildings insurance complaints hit a 10-year high of 7,321 in 2024/25, and around four in ten are upheld (FOS annual data). The complaints that succeed are the ones that read like a case file, not a grievance. Build yours in four parts:

1. A dated chronology

List every material event in order: the date of the loss, when you notified the insurer, every call and email, every visit, every promise made and missed. Delay complaints are upheld at some of the highest rates the ombudsman publishes, 57% for buildings insurance (FOS), but only when the delay is documented.

2. The policy wording

Quote the exact clause the insurer relied on, and the wording you rely on. If the rejection letter says "wear and tear", quote the storm or escape-of-water section that you claimed under, and any definition the policy gives. If you are not sure what your wording actually says, because policy documents are not written to be read, you can upload your policy to Roci and see what is covered, excluded, and conditional before you write a word.

3. Your evidence

Attach it, do not describe it: photographs, a roofer's or plumber's report, weather data for the date of loss, receipts, quotes on your own contractors' rates. Match each piece of evidence to the point it proves.

4. A specific ask

"Deal with my claim properly" is not an outcome. "Reinstate the claim and settle at the £8,400 quoted by my contractor, plus interest" is. Name the remedy: overturn the rejection, increase the settlement, pay compensation for the delay, or all three.

For delays, the Insurance Act 2015 (as amended by the Enterprise Act 2016) implies a term into your policy that claims must be paid within a reasonable time, and breach of it can entitle you to damages on top of the claim itself. Citing the right law signals that you know the ground you stand on.

A skeleton that works

If you want a starting structure, this five-paragraph shape covers everything an investigator will later look for:

1. Opening: "I am making a formal complaint about the handling of claim [reference] under policy [number]." State the decision or failure you are complaining about in one sentence.
2. Chronology: the dated timeline, kept to facts. One line per event.
3. Why the decision is wrong: the policy wording, the law if it applies, and the evidence, point by point. Deal with the insurer's stated reason head-on; do not argue past it.
4. Impact: what the failure has cost you, in money and in disruption. Quantify where you can; this is what distress and inconvenience awards are measured against.
5. The remedy: exactly what you want, and a note that you will refer the complaint to the Financial Ombudsman Service if it is not resolved.

Attach your evidence as numbered exhibits and refer to them by number. A complaint an investigator can navigate in five minutes is a complaint that gets taken seriously.

Common mistakes that weaken a complaint

The same avoidable errors appear again and again in rejected complaints:

• Complaining about everything. Ten grievances bury the two that matter. Lead with the decision that costs you money.
• Emotion in place of evidence. Anger is understandable, as weeks without a working kitchen will do that, but the impact section is where it belongs, translated into facts.
• Accepting an interim offer without reserving your position. You can take an urgent partial payment and still dispute the balance; say so in writing when you accept it.
• Missing the insurer's stated reason. If they said "gradual damage" and your complaint argues about something else, they will simply restate the rejection. Answer the reason they actually gave. If you are not sure what their clause means in your policy, that is a wording question worth solving first.
• Waiting. Nothing about complaining pauses your claim or your deadlines, and memories, receipts, and weather records all degrade with time.

The 8-week rule

Once your complaint is received, FCA dispute-resolution rules (DISP) set hard deadlines:

Two things catch people out. First, a summary resolution communication, the short letter used when a complaint is settled within three business days, still gives you full ombudsman rights. Second, nothing restarts the 8-week clock: not new correspondence, not a revised offer, not a request for more information. It runs from first receipt.

What a final response letter looks like

The final response is the insurer's formal last word. It must:

• state their decision on each point you complained about
• explain the reasoning, with reference to the evidence and policy terms
• tell you about your right to refer the complaint to the Financial Ombudsman Service, enclose or link the ombudsman's leaflet, and state the six-month deadline

Read it carefully against your complaint. Insurers sometimes answer an easier complaint than the one you made, upholding a minor service point while ignoring the declined claim. If the letter does not address your central issue, say so in your ombudsman referral; partial answers rarely survive an investigator's file review.

If eight weeks pass with nothing

You do not have to wait a day longer. Once eight weeks have elapsed without a final response, you can refer your complaint to the ombudsman immediately, and the insurer's silence becomes part of the case. In 2024/25 the ombudsman received 305,726 complaints across all products and upheld 34% (FOS annual data); claims-handling failures, including non-response, are exactly what it exists to fix.

Keep everything

From today until the claim is settled, keep:

• every letter and email, and contemporaneous notes of every call (date, name, what was said)
• copies of your complaint and all attachments as sent
• the final response letter, which the ombudsman will ask for
• receipts for anything the delay forced you to spend (alternative accommodation, emergency repairs)

If the final response does not resolve things, your file is already assembled for the next stage: taking your complaint to the ombudsman. It is worth checking your realistic chances before you decide.