How Much Critical Illness Cover Do You Need in the UK?

Key Takeaway

Critical illness cover pays a tax-free lump sum if you are diagnosed with a specified serious condition such as cancer, heart attack, or stroke. Most employer sick pay schemes run for 3 to 6 months at full pay, then drop sharply or stop altogether, leaving you to rely on Statutory Sick Pay of just £116.75 per week (as of August 2026; verify current rates with an FCA-authorised adviser). The right cover amount replaces lost income, clears debts, and funds treatment or home adaptations during recovery.

Why Critical Illness Cover Matters

When you fall seriously ill, your income can disappear faster than your bills. According to the Association of British Insurers, critical illness cover is designed to bridge the financial gap that opens when employer sick pay ends and you face months or years of reduced earning capacity.

Employer schemes vary widely. Some pay full salary for 6 months, others for just 8 weeks. After that, you drop to Statutory Sick Pay, which rarely covers a mortgage, let alone living costs. Critical illness cover gives you a lump sum to replace that income, pay for private treatment if NHS waiting times are long, adapt your home, or clear debts so you can focus on recovery.

What Employer Sick Pay Typically Covers

Most UK employers offer occupational sick pay that tops up Statutory Sick Pay for a limited period. A common pattern is full pay for 3 months, half pay for another 3 months, then nothing beyond statutory minimums. Some public sector roles offer more generous terms; many small businesses offer less.

Once employer sick pay stops, you fall back on Statutory Sick Pay, currently £116.75 per week for up to 28 weeks (MoneyHelper, 2026). That works out to around £500 per month, far below most household budgets. If you are self-employed, you get nothing beyond statutory benefits unless you have arranged your own cover.

How Much Cover Do You Actually Need?

The right amount depends on your monthly outgoings, your savings, how long your employer sick pay lasts, and whether you have dependants. As covered in foundational texts such as Principles of Finance, insurance planning starts with calculating your true financial exposure, not guessing at round numbers.

Start with your essential monthly costs: mortgage or rent, utilities, council tax, groceries, insurance premiums, loan repayments, and school fees if applicable. Multiply that figure by the number of months you would need to cover if you could not work. Subtract any employer sick pay you would receive during that period, and subtract your accessible savings (emergency fund, easy-access accounts).

The gap is your cover need. For example, if your essential spending is £2,500 per month and your employer pays full salary for 6 months, you might aim for a lump sum that covers 12 to 24 months beyond that point, plus a buffer for one-off costs such as home adaptations or private treatment. That could mean £30,000 to £60,000 or more, depending on your circumstances.

Factors the Calculator Considers

The critical illness cover calculator walks you through the key variables:

Your monthly essential spending (mortgage, bills, food, travel, loan repayments)
How long your employer sick pay lasts and at what percentage of salary
Your current savings and emergency fund
Debts you would want to clear immediately (credit cards, personal loans, car finance)
One-off costs you might face (home adaptations, private medical treatment, childcare)
How many months of replacement income you want beyond employer cover

It then shows you a recommended lump sum and lets you adjust assumptions to see how the figure changes. You can compare the cost of different cover levels and policy terms to find a balance between affordability and protection.

What Critical Illness Policies Cover

Critical illness cover pays out on diagnosis of a listed condition, not when you are simply off work. The core list typically includes cancer (excluding early-stage skin cancers), heart attack, stroke, major organ transplant, kidney failure, multiple sclerosis, and paralysis. Insurers may cover 40 to 50 conditions in total; the policy wording defines each one precisely, so read the definitions carefully.

The payout is a one-time lump sum. You can spend it however you choose: replacing income, clearing the mortgage, funding private treatment, adapting your home, or building a buffer while you recover. Some policies offer partial payments for less severe diagnoses; others pay the full sum on first claim and then end.

According to the Financial Conduct Authority, it is important to understand which conditions are covered, the survival period (typically 14 to 30 days after diagnosis), and any exclusions (pre-existing conditions, self-inflicted injury, conditions diagnosed within the first 90 days).

Next Steps

Use the calculator to work out your cover need based on your real numbers. The result is a starting point, not a final answer. Every household is different, and your circumstances may change (a new baby, a house move, a promotion that increases your employer sick pay).

Once you have a target figure, compare policies from FCA-authorised insurers. Check the definitions of covered conditions, the exclusions, whether the policy pays out more than once, and whether it includes any partial payment options. Consider speaking to an FCA-authorised financial adviser who can recommend a policy suited to your personal situation and health history.

Cover, premiums, and terms vary by insurer and by individual risk factors. Always read the policy wording, the key facts document, and the policy summary before deciding. Verify current terms and confirm your personal eligibility with an FCA-authorised adviser, as the information above is general education only and not regulated financial advice. We are not authorised by the FCA to provide personal recommendations.

Disclaimer: This article provides general information only and does not constitute regulated financial, insurance, or health advice. We are not authorised by the Financial Conduct Authority. Critical illness cover terms, definitions, exclusions, premiums, and eligibility vary by insurer, policy, and individual circumstances. The calculator provides an estimate based on the information you enter; it is not a personal recommendation. You should read the full policy wording, key facts document, and policy summary from any insurer you are considering, and consider speaking to an FCA-authorised insurance adviser or financial adviser for guidance tailored to your personal situation and health history before making any decision. Statutory Sick Pay rates and employer sick pay schemes change; verify current rates and your employer’s actual scheme terms. This information is current as of August 2026; always confirm details with an FCA-authorised adviser or the insurer before deciding.