Critical Illness Cover Calculator — The Honest 2026 Cost

Critical illness cover (CIC), also called critical illness insurance or dread disease cover, pays a tax-free lump sum if you're diagnosed with one of the serious medical conditions specified in your policy. Unlike income protection, which replaces your income monthly for as long as you can't work, CIC pays a one-off amount — typically £50,000 to £500,000 or more — that you can use however you genuinely need, whether that's clearing the mortgage, funding private treatment, or simply covering bills during recovery.

For £100,000 of standalone critical illness cover over a 25-year term, a healthy non-smoker can typically expect:

Premiums rise meaningfully with age, reflecting genuinely higher underlying risk. Smokers typically pay around 1.8 times more than non-smokers at the same age and cover level. These are illustrative benchmarks, not personal quotes — your own price depends on health, family history and the specific insurer.

Many insurers offer critical illness cover combined with life insurance as a single policy, paying out on whichever happens first — death or a qualifying critical illness diagnosis. This is generally more cost-effective than buying two separate policies, but it provides only one payout; claim on the critical illness element, and the life insurance element ends with it.

Standalone critical illness cover, held alongside genuinely separate life insurance, allows for two independent claims if your budget allows — a claim on one doesn't affect the other. This suits people who specifically want the protection to remain fully intact even after a critical illness payout, rather than combining everything into a single, first-event policy.

UK critical illness policies typically cover 40 or more specified conditions, defined against the ABI 2020 standard — a set of agreed definitions used across the industry to reduce disputes at claim time. The core conditions almost every policy includes are cancer (most types, though not all), heart attack of a specified severity, stroke, multiple sclerosis, and kidney failure. Some modern, "severity-based" policies also pay partial claims — typically 10% to 50% of the sum assured — for lower-severity diagnoses that don't meet the full definition of a specified condition.

It's worth being honest at application about family medical history, particularly first-degree relatives (parents, siblings) with certain hereditary conditions diagnosed before age 60-65 — misrepresentation can void a policy entirely, and honest disclosure at the outset, even if it means a modest rate increase or exclusion, is genuinely far better than a claim being declined years later.

A genuinely practical approach: add up your outstanding mortgage balance (the largest debt most families carry), any other significant debts (car finance, credit cards, personal loans), and enough to cover living costs and childcare for a realistic recovery period, typically expressed as a year or more of income replacement. The average UK critical illness claim pays around £67,600 to £70,000 according to Association of British Insurers data — a useful benchmark, though your own genuine need may be higher or lower depending on your specific mortgage and family circumstances.

You're 35, a healthy non-smoker, wanting £150,000 of standalone critical illness cover over a 25-year term to match your mortgage. Level cover costs roughly £66 a month. The same sum assured on decreasing cover, tracking your mortgage balance down, costs roughly £40 a month — a genuine saving of around £26 a month, or £7,800 over the full 25-year term, in exchange for cover that reduces alongside your mortgage rather than staying fixed.

Official sources & further reading: read general protection insurance guidance at MoneyHelper, check ABI claims statistics at the Association of British Insurers, and verify any broker on the FCA register. Compare against whole of life vs term insurance, or browse every tool on the mortgage calculators homepage.