Critical illness cover pays you a tax-free lump sum if you’re diagnosed with a serious illness listed in your policy, such as many types of cancer, a heart attack or a stroke. Unlike life insurance, it pays out while you’re alive. Whether it’s worth it depends on how you’d cope financially if you couldn’t work for months, but for most people with a mortgage or a family relying on their income, it’s well worth looking at.
This guide explains how critical illness cover works, how often claims are paid, and how to decide whether you need it.
How does critical illness cover work?
You choose an amount of cover and a term, often to match your mortgage. You pay a monthly premium, and if you’re diagnosed with one of the conditions in your policy during the term, and meet the insurer’s definition, the policy pays out the lump sum. You can use the money however you need: paying off some or all of the mortgage, covering time off work, adapting your home, or paying for treatment or care.
Most policies cover the same core conditions, which are defined to standards set by the Association of British Insurers, and many add dozens more. Some also make smaller partial payments for less severe conditions, and many include cover for your children at no extra cost.
Do critical illness claims actually get paid?
Most do. According to the Association of British Insurers:
- Insurers paid 90.2% of new critical illness claims in 2025.
- The average individual payout was £67,000.
- Individual critical illness payouts have topped £1 billion a year for five years running.
- Almost two-thirds of claims were for cancer.
When claims are declined, the usual reasons are that the illness wasn’t covered by the policy, didn’t meet the policy’s definition, or that information wasn’t disclosed when the policy was taken out. That’s why the details matter, and why it’s worth getting advice on which policy has the best definitions for you.
Is critical illness cover worth it?
Ask yourself what would happen if you were diagnosed with a serious illness tomorrow and couldn’t work for six months or a year:
- How long would your employer pay you full sick pay? Statutory sick pay is £123.25 a week from April 2026, for up to 28 weeks.
- How many months of mortgage payments and bills could your savings cover?
- Would your partner need to take time off to care for you?
- Would you want the option of private treatment, or adaptations to your home?
If the answers worry you, critical illness cover can take the financial pressure off at the worst possible time, so you can focus on getting better.
Critical illness cover or income protection?
They do different jobs. Critical illness cover pays one lump sum for a listed serious illness. Income protection pays a monthly income if any illness or injury stops you working, including common causes such as back problems and mental health conditions, which critical illness cover often won’t cover. Many people have both: critical illness cover to clear or reduce the mortgage, and income protection to keep the household bills paid.
Questions people ask
Is the payout taxed?
Payouts from a personal critical illness policy are normally free of income tax and capital gains tax.
Can I add critical illness cover to my life insurance?
Yes. Many people take combined life and critical illness cover, often to protect the mortgage. A combined policy usually pays out once, on whichever happens first, and is cheaper than two separate policies.
Are my children covered?
Many policies include free cover for your children if they’re diagnosed with a covered condition, usually for a smaller amount. We’ll show you what each insurer offers.
Can I get cover if I’ve been ill before?
Often, yes, though the insurer may exclude that condition or charge more. Insurers take different views, so it helps to have an adviser who knows which ones to approach.
How much cover should I have?
A common starting point is enough to clear your mortgage, or enough to cover one to two years of your income. We’ll help you work out a figure that fits your budget.
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How McDowell can help
We’re a Northern Ireland based adviser with over 30 years’ experience. We’ll explain the differences between insurers’ policies in plain English, so you know exactly which conditions you’re covered for, and find cover that fits your budget. Find out more on our critical illness cover page, or book a free call below.
Critical illness cover only pays out for the conditions defined in your policy, and some conditions are excluded. Cover is subject to the insurer’s acceptance and terms.
This article is general information only and isn't personal advice. Mortgage and protection products depend on your circumstances, so please speak to one of our advisers before making a decision.
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