Critical illness insurance
Insurance that pays a lump sum on diagnosis of a covered serious illness, regardless of actual costs incurred.
Last reviewed July 15, 2026
Reviewed for accuracy and clarity by Sandeep Singh before publication. Learn about our editorial process.
What it means
Critical illness insurance pays a lump-sum benefit if you're diagnosed with a serious illness named in the policy — commonly cancer, heart attack, or stroke — regardless of what it actually costs you. The payout is generally yours to use however you choose: medical costs, replacing lost income, or anything else.
Why it matters
It solves a different problem than disability or life insurance: a serious diagnosis often creates costs and income disruption even if you're able to keep working, or before a disability claim would apply.
Common misunderstandings
- It only pays out for illnesses specifically named in the policy, and usually only after surviving a defined waiting period after diagnosis.
- It isn't a substitute for disability insurance — one covers a diagnosis event, the other covers an ongoing inability to earn income.
- Coverage and covered conditions vary meaningfully between insurers, so "critical illness insurance" isn't a single standardized product.
Where you'll see it
Often offered alongside life insurance, and worth comparing carefully rather than assuming policies are equivalent.
Related terms
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