Critical Illness Cover vs Income Protection: Which Do You Need?
Critical illness cover pays a lump sum on diagnosis. Income protection pays a regular income while you cannot work. They serve different purposes and many people with dependants or mortgages need both. This guide explains the differences, how each product works, and how to decide what your situation requires.
What each product does
Critical illness cover
- Pays a lump sum on diagnosis of a listed condition
- Pays regardless of whether you can return to work
- Only covers defined conditions — typically cancer, heart attack, stroke, and others on the insurer's list
- Payment is once per policy, then the policy ends (or continues if a separate life element)
- Use of money is unrestricted — mortgage, treatment, adaptations, income replacement
Income protection
- Pays a regular income (monthly) while you cannot work
- Covers any illness or injury preventing work — not a defined list
- Pays from the end of a deferred period (e.g., 4 weeks, 13 weeks, 26 weeks) until you return to work or the policy ends
- Long-term policies can pay to retirement age if you never return to work
- Benefit is typically 50–65% of pre-disability income (to maintain work incentive)
When each product helps most
Critical illness suits
- Paying off a mortgage on diagnosis — removing a large debt changes your financial position fundamentally
- Funding private treatment or experimental therapies not available through the NHS
- Home adaptations required after a stroke or loss of limb
- A financial injection at the time of a specific serious diagnosis, regardless of ability to work
Income protection suits
- Maintaining mortgage payments, household bills, and day-to-day living costs during an extended absence
- Protecting against common conditions that prevent work but fall outside a CI list — back problems, mental health conditions, musculoskeletal issues
- Self-employed workers with no employer sick pay — see our guide for the self-employed
- Long-term income replacement if illness prevents permanent return to work
Side-by-side comparison
| Feature | Critical illness cover | Income protection |
|---|---|---|
| Payment type | Lump sum | Monthly income |
| Trigger | Diagnosis of defined condition | Inability to work (any cause) |
| Conditions covered | Defined list only | Any illness or injury |
| Duration of benefit | One-off | Ongoing until return to work or policy end |
| Typical amount | £50,000–£250,000+ lump sum | 50–65% of salary, monthly |
| Works if you return to work? | Pays regardless | Stops on return to work |
| Deferred period | Usually 14–30 day survival period | 4 weeks to 52 weeks (you choose) |
CI vs income protection FAQ
Frequently asked questions
- They can overlap in the period immediately after diagnosis of a serious illness — you might claim on your critical illness policy (lump sum) while also being off work and claiming on your income protection policy (regular income). The two products are complementary rather than mutually exclusive. The CI payment might clear your mortgage; the IP payment sustains your monthly outgoings. See our critical illness explained article and our income protection article.
- Generally yes, for equivalent cover levels. Income protection is a longer-term commitment (potentially paying out to retirement age) and covers any illness or injury preventing work — a much broader scope than critical illness, which only covers defined conditions. The cost of both depends on age, occupation, health status, and the specific terms chosen.
- If budget is constrained, income protection is generally considered the higher priority for most working adults with financial commitments — it covers a broader range of scenarios (including conditions not on a CI list) and provides sustained income replacement. Critical illness adds value as a capital injection at the time of a serious diagnosis, but income protection addresses the underlying financial vulnerability more completely.
- Employer sick pay (statutory or enhanced) provides short-term support — typically 1–6 months. Income protection starts where sick pay ends (after a deferred period you choose) and continues until you return to work or reach the policy end date. For anyone with financial obligations extending beyond 6 months, employer sick pay alone is insufficient. See what insurance do I need? for a stage-of-life framework.