What critical illness cover actually covers
Insurers pay on definitions, not on the number of conditions a comparison site counts. That gap is where declined claims come from.
Cancer, heart attack and stroke make up the large majority of critical illness claims. Each condition carries a severity definition that must be met, so the wording of the top three matters far more than how many conditions are listed. Most policies also cover your children at no extra premium.
The conditions that make up most claims
Insurers publish their claims data. Three conditions dominate almost every insurer's figures.
| Condition | Roughly what share of claims | Note |
|---|---|---|
| Cancer | Around 65% | Subject to a severity definition, not every diagnosis |
| Heart attack | Around 10% | Must meet a defined severity |
| Stroke | Around 8% | Must cause permanent symptoms in most definitions |
| Everything else | The remainder | Multiple sclerosis, organ failure and many others |
Typical UK industry proportions. Every insurer publishes its own claims statistics, and you can ask for them.
A policy listing 90 conditions is mostly listing the tail. What matters is how the top three are defined.
Definitions decide claims, not lists
- Cancer definitions usually exclude early stage and non-invasive types
- Heart attack definitions require specific measured evidence
- Stroke definitions usually require symptoms lasting beyond a set period
- Some conditions pay a partial amount rather than the full sum
- Severity-based policies pay a percentage matched to how serious the diagnosis is
Ask for the policy summary and read the top three definitions before you compare prices. That is the whole comparison.
What a claim is typically for
Insurers publish average claim sizes. The figures are large enough to change a family's options and smaller than most people expect.
| Cover | Typical claim amount | What it usually pays for |
|---|---|---|
| Critical illness | Around £67,000 | Clearing or reducing a mortgage, time off work, adaptations |
| Life cover | The mortgage, and a period of replaced income | |
| Income protection | Around £10,700 | Monthly bills while you are unable to work |
Illustrative industry averages rather than a promise. Your own claim would be whatever sum you insured.
Want this checked against your own situation?
Send us the figures and we will tell you what they mean. If it is not ours to advise on, we will say who should.
Ask us a questionPrefer WhatsApp? Message us there. We are open Monday to Saturday, 9am to 8pm.
We advise on and arrange life cover, critical illness cover and income protection ourselves. There is no fee to you for our advice. If you take out a policy, the insurer may pay us a commission.
Children's cover is usually included
Most critical illness policies cover your children at no extra premium, up to a capped sum and between set ages.
It is one of the least known features and one of the most used. For many families it is the reason to take critical illness cover rather than the alternative.
Terms differ. Some include the child from birth, some from a few weeks old. Some cover a child up to 18, some to 22 in full-time education.
Why claims get declined
Where you stand
- Clearing the mortgage outright is the priority
- You want children's cover included
- Your employer sick pay is generous and long
- You have savings that would bridge several months
- You are self-employed with no sick pay
- Your main worry is being unable to work at all
- Mental health or musculoskeletal problems concern you
- You need income rather than a single lump sum
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Broadband speeds can vary street by street, so check the exact address before you commit. Ofcom's free checker shows which broadband speeds and mobile coverage are available at any UK property.
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Questions people actually ask
What does critical illness cover actually cover?
How many conditions should a policy cover?
Are children covered?
Does critical illness cover mental health conditions?
Why do critical illness claims get declined?
How do I check broadband speed at a property?
Where to go next
Figures checked on 1 September 2026 and correct for the 2026/27 tax year. Rates change, so check the source before you act on a number.
Want the definitions read properly before you buy?
That is the part of this job that matters. We advise on and arrange critical illness cover ourselves.
Start a conversationPrefer WhatsApp? Message us there. We are open Monday to Saturday, 9am to 8pm.
We advise on and arrange life cover, critical illness cover and income protection ourselves. There is no fee to you for our advice. If you take out a policy, the insurer may pay us a commission.