Life insurance and critical illness cover do different jobs, and the choice between buying them together or separately comes down to one question: do you want the two payouts to be independent of each other? Life insurance pays a lump sum when you die, or often when you are diagnosed with a terminal illness and are expected to die within 12 months1. Critical illness cover pays a one-off tax-free lump sum when you are diagnosed with one of the specific conditions listed in the policy, which typically runs to 100 or more diseases and conditions subject to severity requirements2.
A combined policy wraps both into one plan. It is usually the cheaper way to buy the two, but most combined policies pay out once, so a critical illness claim normally ends the life insurance element too3. Buying standalone critical illness cover alongside a separate life policy costs more, but a critical illness claim leaves the life cover untouched5.
What life insurance pays and what critical illness cover adds
Life insurance pays an agreed sum to the people you choose if you die while the policy is in force, and you pay a set amount every month for the length of the term7. Most policies also pay out early on a terminal illness diagnosis, often where you are expected to die within 12 months1. It is sometimes called life assurance, decreasing cover or mortgage protection insurance8.
Critical illness cover is a different product. It pays a lump sum if you develop a critical illness such as cancer, heart failure or stroke, and the money is yours to use as you wish9. Policies commonly cover cancer, heart attacks and strokes, and one provider describes its cover as including the three most common reasons for a claim10. The list of covered conditions is long, but the definitions are specific and severity requirements apply2.
The two can be arranged in three broad ways. You can buy life insurance on its own. You can add critical illness cover to a life policy, either as a combined plan or as an optional extra. Or you can buy critical illness cover separately, which is what this page compares12. Critical illness cover can be added to a life insurance policy or bought separately, and it is available as a single or joint policy12.
Combined cover pays once, not twice
This is the single most important difference, and it is where most of the confusion sits. Critical illness policies pay out once, and the cover then ends6. A combined life and critical illness policy will also reduce the final amount paid out on death if money has already been paid for critical illness1. Most combined policies pay out once, meaning that if you claim for a critical illness, the life insurance element usually ends too3.
The effect is that a combined policy behaves like a single pot of money that can be triggered by either event, whichever happens first. If you are diagnosed with a covered illness, you receive the lump sum and the policy is finished. If you die without having claimed for a critical illness, your beneficiaries receive the lump sum instead. You do not get both.
Two standalone policies behave differently. One provider sets out the choice plainly: one cover for life or critical illness pays out for whichever event happens first, while two separate covers mean a critical illness claim leaves the life cover unaffected5. That is the trade-off. The combined route is usually cheaper, and the standalone route costs more but keeps the two protections independent.
Joint policies add a further wrinkle. A joint life policy covers two people on one plan, usually pays the full cover amount once, and then ends with no cover for the surviving partner14. The insurer pays out only once, leaving the surviving partner uninsured15. On a joint plan with critical illness added, the cash sum is payable on the first life insured to suffer a critical illness16. Some insurers allow the survivor to continue critical illness cover after the first valid claim, and some allow the person who was not the cause of the claim to reinstate cover, but only once17.
Health questions, disclosure and GP checks
Both routes are medically underwritten, which means acceptance depends on your own circumstances19. Applicants are normally asked about current health, previous health problems and any major health problems in the family20. Life insurers commonly ask whether other illnesses have been diagnosed within the past five years and whether you have received any medical treatment in the past 12 months, and they will check your answers with your GP7.
You must tell your insurer if you smoke or vape using nicotine products, even occasionally, and insurers weight premiums for people who use vapes, gum and patches the same as for those who smoke cigarettes22. If you lie about your smoking to get a cheaper premium, you will have committed fraud, and the policy may be declared void and any payout refused when your family claims22. Providing false information during the application process may lead to a denial of the claim7.
For critical illness claims specifically, the insurer will likely contact your GP for confirmation of diagnosis23. Insurers may also require a medical examination, often sending a specialist nurse to your home in complex cases22. Where a policy includes an increase option, exercising it may not trigger further medical questions: one provider states that if you choose to exercise the option, it will not ask any more medical questions24.
A pre-existing condition changes the picture. Many insurers will not cover pre-existing medical conditions, and existing diagnoses will not be covered under the policy23. Any cover you do find is likely to be more expensive and may carry more extensive exclusions than cover for people without a history of medical issues6. People who have recovered from cancer may be asked for detailed medical information and to attend a medical examination, with higher premiums and restrictions on the maximum sum insured22.
Where a policy will not pay out
Critical illness policies typically will not cover being diagnosed with an illness outside your policy term, death during the term, death within a certain number of days of receiving the diagnosis, or an illness not explicitly covered by the insurer6. One insurer's policy documents state that no payout is made if the condition or procedure does not meet the definition, if you die, or if death occurs within 14 days of diagnosis of a covered critical illness25. Another lists the circumstances where a claim will not be paid as not meeting the policy definition, dying within 14 days of diagnosis, giving false information during the application, and the policy lapsing through missed payments26.
Critical illness cover does not pay out on death, and it does not pay out if you die27. That is the gap a life policy fills, and it is the reason the two are often bought together. Some conditions are excluded by name: one provider's cover excludes mental health conditions such as depression and anxiety, some types of cancer, and less advanced cases of cancer29. Some illnesses require permanent symptoms before a claim is valid18.
Life insurance has its own exclusions. These include non-death events, suicide within the first two years, illegal or criminal activities, dangerous activities, death outside the coverage area, policy lapse through non-payment, and misrepresentation or fraud21. Death by suicide or self-harm is mostly covered, except in the first year or two after taking out the policy7. If the policy lapses through non-payment, coverage stops and no benefits will be paid7.
Does life insurance pay out if I am diagnosed with cancer?
Usually not. Life insurance normally pays out only when you die, so a cancer diagnosis will not automatically pay anything22. Critical illness cover is the product that pays a lump sum on diagnosis of a serious illness, including many types of cancer22. If your cover is bundled with life insurance, a critical illness payout will reduce the amount that could be paid out if you later die within the term6. A combined policy that pays out for critical illness may reduce the final life insurance payout when you die2.
The exception on the life side is the terminal illness clause. A single life policy will pay out on death or, often, if you receive a diagnosis that you have a terminal illness and will die within 12 months1. That is different from critical illness cover, and not all policies include it, so it is worth checking your documents30.
Keeping cover in place and setting it up in trust
Critical illness cover comes in two main types: level cover or decreasing cover6. Level cover keeps the payout the same throughout the term; decreasing cover reduces it, typically in line with a repayment mortgage. Life insurance is most often underwritten on your personal circumstances, and premiums are affected by age, health and lifestyle30. The cost is based on factors such as your age, health, job, whether you smoke, the policy length and the amount of cover, and generally the younger you are when you take out the cover, the lower the cost11.
Policies can be placed in trust31. Writing a policy in trust means your family receives the money sooner, because they do not have to wait for probate, and the payment does not form part of your estate, so it is not subject to inheritance tax7. That matters because if your estate is valued at more than £325,000, inheritance tax will be charged on the insurance payout6. Life insurance payouts are not subject to income tax or capital gains tax32, and critical illness payments are not classed as income, so no income tax is due on the money6.
Children's cover is often an optional add-on rather than a built-in feature. One provider's combined plan has no built-in children's critical illness cover, and children's critical illness protection can be added at any time10. Another offers children's cover and critical illness cover as optional add-ons, each with a separate additional premium, and you can add one or both at the outset or later33. Where children's cover is built in, one provider pays £25,000 or 50% of your cover amount, whichever is lower10. On joint plans, only one payment is made for children's critical illness cover for any child in respect of each person covered17.
If you miss a payment or want to cancel
If you stop paying your premiums, your cover will stop, your policy will end, and you will receive no benefit3. If you do not pay on time, your cover will stop, your policy will end, and you will get nothing back23. You may lose your cover if you miss your monthly payments34. Many life insurance policies come with a grace period, usually around 30 days, but if the policy lapses through non-payment, coverage stops and no benefits will be paid7.
Cancelling is a separate decision from lapsing. Typically you will not get your money back if you cancel your life insurance, though a refund of premiums already paid is possible during the grace period21. A joint policy can be cancelled at any time, but there is no refund of premiums already paid outside the cooling-off window35. If you stop paying, the policy ends and you receive no benefit3.
Once a policy is in place, the premiums cannot be increased after a cancer diagnosis, and if you are later diagnosed with diabetes you do not have to tell your insurer or pay higher premiums22. Some insurers will reduce premiums if you sign a declaration that you have given up smoking, but most will not discount an existing policy22. If you need to change the policy itself, options typically include extending or reducing the period of cover, increasing or decreasing the amount of cover, removing a life on a joint policy, and changing how you pay your premiums24.
Where to get help
If a claim is turned down and you think the decision is wrong, the Financial Ombudsman Service handles complaints about insurance, including personal accident and medical insurance9. Free, impartial guidance on protection insurance and on dealing with debt is available from MoneyHelper, and debt advice charities can help where a death or illness has left debts behind. In Northern Ireland, nidirect sets out what happens to debt when someone dies, including which debts are paid from the estate and which may pass to someone else36.
Sources36 cited
- Joint life insurance explained Which?, 2025-08-06
- Over 50s life insurance Which?, 2025-12-03
- Critical illness insurance FAQs Cavendish Online, 2026-09-26
- Critical illness cover Cavendish Online, 2026-09-26
- The difference between life insurance and critical illness cover Royal London, 2026-09-26
- Critical illness insurance explained Which?, 2026-08-24
- Types of life insurance policy Which?, 2025-05-16
- How to leave your home to a disabled family member Scope, 2026-09-08
- Personal accident insurance complaints Financial Ombudsman Service, 2026-09-27
- Life and critical illness cover Guardian, 2026-06-08
- Life insurance explained Scottish Widows, 2026-09-25
- Family income benefit insurance explained Which?, 2026-09-07
- Increasing term life insurance Cavendish Online, 2026-09-26
- Types of life insurance Aviva, 2024-02-14
- What is life insurance Post Office, 2026
- Life cover help and support Post Office, 2026
- Plan life or critical illness cover Royal London, 2023-12
- Critical illness cover Legal & General, 2026-09-26
- Insurance The Hanley, 2026-09-26
- Insurance and genetic conditions FAQs Genetic Alliance UK, 2026
- Types of life insurance policy Which?, 2025-05-16
- Life insurance with cancer explained Which?, 2026-06-25
- What is critical illness cover Halifax, 2026-09-27
- Making changes to your policy Legal & General, 2026-09-26
- Life insurance and critical illness cover policy summary TSB, 2026-01
- Critical illness: what's covered Legal & General, 2026-09-26
- Critical illness Santander, 2026
- Life insurance glossary Aviva, 2026-09-26
- Critical illness cover FAQs Legal & General, 2026-09-26
- Accidental death insurance explained Which?, 2026-06-25
- Critical illness cover for advisers Legal & General, 2026-09-26
- How to write life insurance in trust Which?, 2026-04-06
- Children's cover Post Office, 2026
- Approach to PPI mis-sale complaints Financial Ombudsman Service, 2026-09-26
- Joint life insurance Cavendish Online, 2026-09-26
- Debt when someone dies nidirect, 2026-06-26







MoneyHelperFree, impartial money and pensions guidance, set up by government
Financial Ombudsman ServiceFree, independent help when a complaint about a firm is not put right
FSCSProtects your money if a bank, insurer or investment firm fails
Citizens AdviceFree advice on money, consumer and legal problems in England and Wales
Turn2usFree benefits calculator and grants search from a charity