The Policy That Pays When You're Alive
Life insurance is easy to understand: you die, it pays your family. Millions of UK households have it, often through a workplace death-in-service scheme or a decreasing-term policy attached to a mortgage. What far fewer people have — and what turns out to be statistically more likely to be needed — is critical illness cover.
For a 35-year-old male non-smoker, the probability of dying before 65 is roughly 10–12%. The probability of being diagnosed with a critical illness — cancer, heart attack, stroke, or one of 60–100 other named conditions depending on the policy — before 65 is closer to 33%. You are three times more likely to claim on a critical illness policy than a life policy, and three times more likely to face the kind of financial shock that wipes out savings and forces decisions about housing, work, and care that no one plans for.
What Critical Illness Cover Actually Pays For
A critical illness policy pays a lump sum on diagnosis of a specified condition, provided you survive a survival period of 14–28 days after diagnosis. The money is unrestricted — pay off the mortgage, fund private treatment unavailable on the NHS, adapt the home, cover income during a prolonged recovery. One claim, one payment, no ongoing reassessment.
The conditions covered vary considerably between providers. Aviva's policy covers around 63 conditions; Royal London covers 80+; Legal & General's 2026 policy covers 74. More conditions is not inherently better — what matters is whether the conditions most likely to affect you are covered under the definitions used. Prostate cancer diagnosed at stage T1 or below is excluded by several major providers. Skin cancers other than melanoma are excluded by most.
Look for "ABI model definition" in the policy documents. The Association of British Insurers publishes minimum definitions for the most common critical illnesses; policies meeting or exceeding those definitions offer more predictable claims outcomes than policies using narrower proprietary definitions.
The Overlap With Income Protection
Income protection pays a monthly income — typically 50–70% of gross salary — if you're unable to work due to illness or injury. It doesn't require a specific diagnosis. It pays on incapacity to work, not on the presence of a named condition.
This distinction matters for conditions like long-term back pain, depression, or chronic fatigue syndrome — none of which typically triggers a critical illness payout, but all of which can prevent someone from working for months or years. Income protection covers that income gap. Critical illness does not.
For most UK households, income protection should be prioritised over critical illness cover if the budget forces a choice, because it covers a broader range of disabling conditions and pays ongoing income rather than a lump sum. But both together provide a more complete safety net than either does alone: the lump sum clears the mortgage, the monthly income covers living costs.
Underwriting: Disclose Everything
Both policy types are underwritten individually. A pre-existing condition — diabetes, a history of depression, a parent who died of a heart attack before 60 — may result in a higher premium, a specific exclusion, or a decline. This underwriting decision happens at application, not at claim.
UK insurers operate post-claims underwriting — checking the accuracy of your application when a claim is made. Non-disclosure is one of the most common reasons for disputed life and CI claims. A past diagnosis of mild anxiety treated with a short course of antidepressants is worth disclosing. A GP visit for unexplained chest pain is worth disclosing. The worst outcome from disclosure is a slightly higher premium. The worst outcome from non-disclosure is a denied claim when your family needs the money most.
What Reasonable Cover Costs in 2026
A healthy 35-year-old non-smoker can expect to pay £35–£65 per month for £200,000 of level-term critical illness cover over a 25-year term from providers such as Aviva, Royal London, or Legal & General, depending on health history. Add a life insurance element to the same policy and the cost rises to approximately £45–£80 per month.
These premiums are fixed at application. Cover at 35 costs considerably less than the same cover at 45 — the cumulative premium difference over a 25-year policy is typically £8,000–£20,000. The argument for buying earlier than you think you need it is financially straightforward, not merely a sales pitch.
Use a whole-of-market broker rather than applying directly to a single insurer. Networks such as LifeSearch and Cavendish Online have access to all major UK providers and can identify which insurer's underwriting is most likely to be favourable given your specific health history. Going direct means you never know whether a decline or exclusion was the market's verdict or just one provider's.