An insurance claim rejection can arrive in a few blunt paragraphs after weeks or months of uncertainty. The insurer may refer to an exclusion, wear and tear, non-disclosure, a breach of a policy condition or insufficient evidence. Whatever the wording, the practical effect is the same: the insurer says it will not meet some or all of the loss.

An insurer should be able to connect its conclusion to the policy wording, the relevant facts and the evidence. A strong challenge starts by finding out exactly how it has done that—and where the reasoning may be incomplete.

Why do insurance companies reject claims?

The precise reason should appear in the insurer’s written decision. Common grounds include:

• The event is not covered by the policy.
• A policy exclusion applies.
• The damage developed gradually or amounts to wear and tear.
• The policyholder allegedly failed to take reasonable care when answering questions at inception or renewal.
• The insurer says a policy condition was not followed.
• The claim was notified late and the insurer says this affected its position.
• The evidence does not establish the cause, ownership or value of the loss.
• The insurer alleges exaggeration, misrepresentation or fraud.
• The policy was not in force when the event occurred.

Sometimes the insurer accepts that an insured event occurred but disputes part of the damage. For example, it may accept an escape of water but say that longstanding deterioration, the failed pipe itself or part of the repair falls outside the cover. That is not always a complete rejection, but it can still leave a substantial dispute about what the policy should pay.

First, obtain the insurer’s complete written reasons

Do not try to challenge a rejected insurance claim from a brief telephone explanation. Ask the insurer to confirm in writing:

1. The exact policy terms, definitions, conditions or exclusions relied upon.
2. The factual findings it says trigger those terms.
3. The reports, photographs, recordings, database entries or other evidence supporting those findings.
4. Whether it has rejected the whole claim or only part of it.
5. Whether the letter is a claims decision or a formal complaint response.

This distinction matters. A claims decision may tell you what the insurer has decided, while a final response to a formal complaint should explain the complaint outcome and how it can be referred to the Financial Ombudsman Service.

If the insurer refers to a loss adjuster’s, engineer’s or investigator’s report, ask for a copy. A summary prepared by a claims handler may omit assumptions, qualifications or evidence that affects the conclusion.

Read the policy as a whole—not only the exclusion quoted

Insurance disputes are rarely resolved by looking at one sentence in isolation. Check:

• The insured-event or “peril” wording.
• The relevant definition.
• The exclusion relied upon.
• Any exception to that exclusion.
• Claims conditions and notification requirements.
• Endorsements or special terms on the schedule.
• The basis on which the insurer may repair, replace, reinstate or pay cash.

An exclusion may appear broad until it is read with a policy definition or an exception elsewhere. Equally, wording that sounds unfair in ordinary language may form a clear part of the agreed cover. The objective is to test whether the insurer has applied the wording to the correct facts and in a fair and consistent way.

Build an evidence-led chronology

A persuasive challenge normally needs more than disagreement. Prepare a dated chronology covering:

• When the policy began or renewed.
• When the incident or damage first occurred.
• When it became visible or known.
• What was reported, to whom and when.
• Emergency steps taken to prevent further loss.
• Inspections, reports and decisions.
• Requests made by the insurer and your responses.
• The financial and practical consequences of the rejection.

Gather the documents that prove the important points. These may include the policy schedule and wording, statement of fact, photographs, video, invoices, receipts, maintenance records, expert reports, repair estimates, messages, call recordings and earlier insurer correspondence.

Test the insurer’s factual assumptions

Many rejected claims turn on an assumption rather than a genuinely established fact. Examples include:

• Treating discolouration as proof that damage must have been visible for months.
• Assuming a crack results from poor maintenance rather than an insured cause.
• Treating an estimate as an inflated demand without providing a competing scope.
• Concluding that an answer at policy inception was careless without checking the question actually asked.
• Relying on late notification without identifying any real prejudice caused by the delay.

List each material statement in the decision and place the supporting and conflicting evidence beside it. This turns a general complaint—“the decision is unfair”—into a focused response identifying which findings appear unsupported and why they matter.

Write a structured formal complaint

A useful complaint should be clear enough for someone new to the file to understand. A practical structure is:

For most complaints, the insurer normally has up to eight weeks to issue a final response. Eight weeks is the complaint-response period; it is not a universal deadline within which every insurance claim must be settled.

Can a rejected claim go to the Financial Ombudsman Service?

Eligible consumers and some smaller businesses may be able to refer an unresolved insurance complaint to the Financial Ombudsman Service. The service is free to use.

You can usually refer the complaint after receiving the insurer’s final response or if the insurer has not responded to the formal complaint within eight weeks. The usual referral deadline is six months from the date of a valid final response. Other jurisdictional time limits can apply, so dates should be checked promptly.

A long submission is not automatically a strong one. It should make the disputed findings, policy clauses, chronology, evidence and requested remedy easy to follow. Read more about preparing a Financial Ombudsman complaint.

What if the Ombudsman route is unavailable or unsuitable?

Depending on the policyholder, value, urgency and legal issues, other routes may include negotiation, mediation, court proceedings or advice from a solicitor or specialist barrister. Members of the public and businesses can sometimes instruct an authorised public-access barrister directly, although many direct-access barristers do not conduct the day-to-day litigation.

When professional claim support may add value

Some policyholders can challenge an insurance claim rejection themselves. Professional support may be useful where:

• The rejection depends on technical or competing expert evidence.
• Several policy clauses or causes of damage are in dispute.
• The insurer alleges non-disclosure, misrepresentation or fraud.
• The value of the loss makes a weakly prepared complaint particularly costly.
• An investigator’s assessment needs a focused response.
• Negotiation, litigation or specialist barrister input may need to be considered.

Insurance Dispute Service can review the policy, decision, chronology and available evidence before explaining the strongest apparent options. We cannot guarantee that a rejected claim will be overturned, and the appropriate route always depends on the facts.

Your free complaint options

You do not need to use a claims management company to complain to your insurer. You can do this yourself for free. If eligible and the complaint remains unresolved, you can also refer it to the Financial Ombudsman Service yourself for free.

Frequently asked questions

Official sources and further reading

• Financial Ombudsman Service: home and buildings insurance complaints
• Financial Ombudsman Service: complaint time limits
• Financial Conduct Authority: how to complain

This article provides general information, not legal advice. Insurance cover, complaint eligibility and limitation depend on the policy and individual circumstances.