Critical illness insurance pays you a tax-free lump sum if you’re diagnosed with one of the specified serious illnesses. It’s designed to cover your mortgage, living expenses, or medical costs while you recover.
Common Conditions Covered
| Condition | Typical Payout |
|---|---|
| Cancer | Full sum assured |
| Heart attack | Full sum assured |
| Stroke | Full sum assured |
| Multiple sclerosis | Full sum assured |
| Parkinson’s disease | Full sum assured |
| Kidney failure | Full sum assured |
| Coronary bypass | 25–100% of sum |
Most policies cover 30–40 conditions, but some cover 100+. Always check the specific list.
How Much Cover Do You Need?
Calculate: Outstanding mortgage + 3–5 years of living expenses + any debts
| Scenario | Recommended Cover |
|---|---|
| Single, renting | £50,000–100,000 |
| Couple, mortgage | £200,000–400,000 |
| Family, mortgage | £300,000–500,000 |
| Higher earner | £500,000+ |
Critical Illness vs Life Insurance
| Feature | Critical Illness | Life Insurance |
|---|---|---|
| Pays out | When you’re diagnosed | When you die |
| When you need it | During your lifetime | After your death |
| Policy structure | Can be standalone or added to life | Standalone or combined |
| Cost | More expensive | Less expensive |
Most people buy life insurance with critical illness cover as a combined policy.
What Affects Your Premium
| Factor | Impact on Premium |
|---|---|
| Age | Increases with age |
| Smoking | 2–3x higher |
| Family medical history | May increase |
| Occupation | Higher risk = higher premium |
| Cover amount | More cover = higher premium |
| Policy term | Longer term = higher premium |
Standalone vs Accelerated
Standalone: Separate from life insurance. Pays out if you’re diagnosed, and life insurance still pays on death.
Accelerated: Combined with life insurance. Critical illness payout reduces or cancels the life cover.
Accelerated is cheaper but provides less total protection.
What’s NOT Covered
- Pre-existing conditions
- Minor heart attacks (with full recovery)
- Low-grade cancers (stage 1, some skin cancers)
- Mental health conditions
- Back, neck, or spinal conditions (unless trauma)
- HIV-related conditions
Who Needs It Most
- Mortgage holders — Your home could be at risk
- Single-income families — One illness could devastate household finances
- Self-employed — No sick pay safety net
- People with family history — Higher likelihood of claiming
Who Might Skip It
- Young, healthy, no dependents — Premiums might not justify the cover
- Large savings — Can self-insure
- Employer death-in-service benefits — Check what your employer provides
How to Buy
- Work out your cover amount
- Compare quotes (use a broker for the best rates)
- Be honest about medical history
- Check the condition list — not all policies are equal
- Review every 5 years
Bottom Line
Critical illness insurance is essential if you have a mortgage or family depending on your income. It’s not cheap, but neither is the alternative — losing your home or savings if you get seriously ill. For anyone else, it depends on your savings and personal risk tolerance.
What to watch out for
The biggest mistake is assuming all critical illness policies are the same. Insurers define conditions differently, and what one policy pays out for at 100% of the sum assured, another may exclude entirely. Stage 1 prostate cancer, for instance, is covered by some policies and not others. Always compare the condition definitions, not just the headline price.
Another common error is underinsuring. People sometimes choose a cover amount based on what they can afford in premiums rather than what they actually need. A £100,000 payout sounds substantial until it has to cover a £250,000 mortgage, two years of school fees, and everyday living costs. Work backwards from your actual financial commitments instead.
Keeping your cover current
Your financial situation changes over time. A new mortgage, a second child, or a pay rise all affect how much cover you need. Review your critical illness policy every three to five years, or whenever a major life event occurs. If the cover no longer matches your obligations, increase it — though expect higher premiums if you have aged since the original policy.
It is also worth reassessing whether an accelerated policy is still the right structure. As your mortgage balance falls and your savings grow, you may find that standalone critical illness cover with a smaller sum assured does the job more cheaply. The right policy evolves with your circumstances.