Why does delay in notifying a claim matter so much?

Because prompt notification is a condition of almost every policy, and late notification can reduce or defeat a claim that would otherwise have been paid in full.

What policies typically require. Notification as soon as reasonably possible, or within a stated number of days, of any incident that might give rise to a claim — which is a lower threshold than an actual claim being made against you.

Liability policies frequently go further, requiring notification of circumstances that could lead to a claim, even where nobody has complained yet.

Why insurers require it, and the reasons are genuine:

Investigation while evidence exists. Witnesses can be traced, scenes photographed, CCTV obtained before it is overwritten, and damage inspected before repair. Delay destroys evidence, and an insurer that cannot investigate cannot assess liability properly.

Controlling the claim. Insurers frequently have the right to conduct the defence, and want to do so from the start rather than inheriting a case someone else has been handling.

Mitigation. Early action can limit the loss — drying a flooded building, securing a property, arranging temporary repairs.

Reserving. Insurers must set aside funds against known claims, and cannot do so for claims they do not know about.

Cost. Claims notified late cost more, consistently, which is why the condition exists.

What happens if you notify late. It depends on the policy and the circumstances:

Where notification is a condition precedent to liability, breach can defeat the claim entirely — which is severe and is why the wording matters.

Where it is an ordinary condition, the insurer may claim for any prejudice it suffered as a result.

Under the Insurance Act 2015 for business policies, an insurer cannot rely on breach of a term that could not have increased the risk of the loss that occurred — which has moderated some of the harshest outcomes.

For claims-made liability policies, notification within the policy period is what triggers cover at all, so late notification can mean no policy responds.

What to do:

Notify anything that might become a claim, even if you believe it will not.

Notify before admitting anything — policies prohibit admitting liability, and doing so can prejudice cover.

Do not repair or dispose of damaged items until told you may.

Keep a record of when and how you notified.

General information, not advice.