Critical Illness Cover Calculator

Calculate the right amount of critical illness cover and get premium estimates. Covers cancer, heart attack, stroke and 40+ conditions for 2025/26.

Critical Illness Cover Calculator

Critical Illness Cover Results

Income Replacement (illness period)-
Mortgage Payoff-
Debts + Adaptation Costs-
Recommended CI Cover-
Estimated Monthly Premium-
MB
Mustafa BilgicInsurance & Protection Specialist — Updated April 2026
Critical IllnessCI Cover2025/26

Critical Illness Statistics UK

Condition% of CI ClaimsAverage Age5-Year Survival
Cancer64%4954%
Heart Attack12%5270%+
Stroke8%5460%
Multiple Sclerosis4%38Ongoing
Other Conditions12%VariousVaries

Source: ABI Claims Statistics 2024. 1 in 2 people will experience a critical illness before age 65.

CI Cover Types

Standalone CI
Pays on diagnosis
CI with Life
Combined cover
Children's CI
Usually free add-on

How to Use This Calculator

1

Enter your income

Input your annual income. CI cover should replace income during your recovery period.

2

Set years of replacement

Choose how many years of income you want covered. Most advisers recommend 2-3 years for recovery and adaptation.

3

Add mortgage and debts

Enter your outstanding mortgage and other debts that CI cover should pay off if you become seriously ill.

4

Enter age and smoking status

Your age and smoking status significantly affect premiums. Non-smokers pay substantially less.

5

Review cover and premium

The calculator shows recommended cover amount and estimated monthly premium based on UK market rates.

Frequently Asked Questions

What is critical illness cover?
Critical illness cover pays a tax-free lump sum if you are diagnosed with a serious illness specified in the policy, such as cancer, heart attack, stroke, or multiple sclerosis. Unlike life insurance, you receive the money while you are alive, allowing you to pay off debts, fund treatment, or adapt your home.
How much critical illness cover do I need?
A common recommendation is enough to cover your mortgage plus 2-3 years of income. This gives you time to recover, adapt, or make necessary life changes. You should also consider home adaptation costs, private treatment costs, and reduced earning capacity. Typical cover amounts range from £100,000 to £500,000.
Is critical illness cover worth it?
1 in 2 people will be diagnosed with a critical illness before age 65. The average CI claim in the UK is around £68,000. If you have a mortgage, dependants, or would struggle financially during a serious illness, CI cover is worth considering. The ABI reports that 92% of CI claims are paid.
What conditions are covered?
Policies typically cover 40+ conditions including: cancer (all types), heart attack, stroke, coronary artery bypass, kidney failure, major organ transplant, multiple sclerosis, Parkinson's disease, Alzheimer's, blindness, deafness, and loss of limbs. Minimum definitions are standardised by the ABI Statement of Best Practice.
How much does critical illness insurance cost?
For a non-smoking 35-year-old, £100,000 of CI cover for 25 years costs approximately £25-£40 per month. Premiums increase significantly with age and for smokers. Adding CI to a life insurance policy (CI with Life) is cheaper than standalone CI, but only pays once for either death or critical illness.
Can I get critical illness cover with pre-existing conditions?
Yes, but with exclusions or higher premiums. The pre-existing condition itself will usually be excluded from cover. Some conditions like controlled diabetes or treated high blood pressure may be covered with increased premiums. A specialist broker can search the whole market for the best terms for your situation.

Official Sources & References

Data verified against official UK government sources. Last checked April 2026.