Life Insurance and Critical Illness Cover: A Plain Guide

Life insurance and critical illness cover do two different jobs: life insurance pays a cash lump sum when you die (or are diagnosed as terminally ill), while critical illness cover pays a lump sum if you are diagnosed with a serious condition listed in the policy, such as cancer, a heart attack or a stroke, and survive it. You can buy them separately or bundle them into one policy, and many people choose the combined route to protect both a partner’s future and their own income if they became seriously unwell.

Critical illness cover is a form of protection insurance, regulated by the Financial Conduct Authority, that pays a tax-free lump sum on diagnosis of a defined illness at the severity set out in the policy. The key distinction: life insurance pays out when you die, critical illness cover pays out while you are still alive but seriously ill. Understanding which risk you are worried about, dying and leaving dependants short, or surviving an illness but losing your income, is the starting point for deciding what to buy.

Last updated: August 2026

Written by the Free Price Compare editorial team | Reviewed August 2026

What is the difference between life insurance and critical illness cover?

Life insurance pays a lump sum to your loved ones when you die, whereas critical illness cover pays a lump sum to you if you are diagnosed with a serious illness defined in the policy and meet the severity criteria. Both pay a single tax-free cash sum, but the trigger is completely different: death versus diagnosis. That difference shapes who the money is really for.

Life insurance is designed to clear a mortgage or replace lost income for the people who depend on you after you have gone. Critical illness cover is designed to give you money while you are still here but unable to work or facing large costs, for example adapting your home, paying for treatment, or simply covering the mortgage while you recover.

The Association of British Insurers notes that critical illness policies typically cover core conditions such as cancer, heart attack and stroke, with the ABI’s revised Guide to Minimum Standards for Critical Illness Cover released on 16 September 2022 setting the baseline definitions insurers must meet. Life cover is fairly standardised across the market; critical illness cover is where policies differ most, so the condition list and wording matter as much as the premium.

If you are weighing up which type of cover fits your situation, our overview of everything you ever asked about life insurance sets out the basics in plain terms.

What conditions does critical illness cover pay out for?

Critical illness cover pays out for a defined list of serious conditions, most commonly cancer of a specified severity, heart attack and stroke, which together account for the large majority of UK claims. Beyond these three, most policies also cover conditions such as multiple sclerosis, kidney failure, major organ transplant, Parkinson’s disease, benign brain tumours and permanent loss of sight or limbs.

The exact list varies by insurer, and this is where cover quality differs most. Some providers cover 40 or so conditions; others cover 80 or more. A longer list is not automatically better, because most claims fall under the core three, but the severity wording and definitions decide whether a real-world diagnosis actually qualifies. According to the ABI, insurers paid out 98.3% of critical illness claims in 2022.

• Core conditions: cancer, heart attack and stroke, which the ABI highlights as typically covered and which drive most claims.
• Severity-based conditions: many cancers and heart conditions only pay the full sum if they reach a defined stage or severity.
• Partial or additional payments: some plans pay a smaller amount for less severe conditions (for example early-stage cancers) without ending the policy.
• Children’s cover: several 2026 provider plans include cover for your children as standard, paying a lump sum if a child is diagnosed with a listed condition.

Because a policy only pays what its definitions allow, read the illness list and severity wording before you buy, not after a diagnosis. Two policies at similar prices can differ sharply in what they actually pay for.

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How much does critical illness cover cost in the UK?

Standalone critical illness cover costs vary widely by age, health and cover amount, and provider examples can start from around £5 a month depending on the policy chosen. Price rises steeply with age because the chance of a serious diagnosis increases over time.

The figures below are illustrative level-term premiums for critical illness cover by age. Actual prices depend on your health, smoking status, cover amount and term.

Figures are indicative and may change.

Two things drive the biggest price swings. First, age: premiums roughly quadruple between 25 and 45 in these examples. Second, whether your premiums are guaranteed or reviewable. MoneyHelper notes that the cost of critical illness cover depends on whether the premiums are reviewable or guaranteed. Guaranteed premiums stay fixed for the term; reviewable premiums can start lower but rise over time.

Free Price Compare arranges life and protection cover with our partner LifeSearch, comparing quotes from major UK insurers so you can see combined and standalone options side by side. If you want to understand how the underlying life element is priced, our guide to level or decreasing term life insurance explains the two main policy shapes.

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Is it better to combine these covers or buy them separately?

Combining life insurance with critical illness into one policy is usually cheaper and simpler than buying two separate policies, but buying separately can give you more control over cover amounts and the ability to keep one policy if you cancel the other. There is no universally correct answer, it depends on your budget and what you are protecting.

A combined policy pays out once, on the first event, either death or a qualifying critical illness diagnosis, and then ends. That keeps the price down and covers the two most common worries in one product. The trade-off is that a single lump sum has to do two jobs, so you may want a higher sum assured than for life cover alone.

• Combined cover: lower overall cost, one policy to manage, pays out on the first qualifying event.
• Separate policies: you can set different sums assured and terms, and cancelling one leaves the other in place, but you typically pay more overall.
• Additional (accelerated) critical illness: bringing the critical illness payment forward from a shared life sum reduces what is left for death, unless you choose standalone cover.

Many buyers protecting a mortgage choose combined cover so the loan is cleared whether they die or become critically ill. If you have dependants who would need money after your death on top of money for you during a serious illness, standalone or higher combined cover is worth pricing up in a level term life insurance comparison.

Can you get critical illness cover without life insurance?

Yes, you can get critical illness cover without life insurance by buying it as a standalone policy. Standalone critical illness cover pays a lump sum only on diagnosis of a listed condition and pays nothing on death, so it suits people who already have separate life cover or who mainly want to protect their own income.

Standalone critical illness cover often costs more than adding it to a life policy, because the insurer prices it purely on the illness risk without a bundled death benefit spreading the cost. It can still make sense if you want the critical illness sum to be entirely separate from any death benefit, or if you have life cover through work or an existing policy you want to keep.

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How does income protection cover fit alongside these?

Income protection cover is a separate type of policy that replaces part of your monthly salary if illness or injury stops you working, paying a regular income rather than a one-off lump sum. That makes it the natural companion to critical illness cover, which pays a single lump sum, because between them they handle both a sudden major diagnosis and a longer-term inability to work.

The distinction matters for the many people who assume one product does everything. Critical illness cover pays out once, on diagnosis of a listed condition, and then the policy ends. Income protection keeps paying a monthly amount, often until you recover, retire or the policy term ends, and covers a far wider range of illnesses and injuries, including conditions that would never trigger a critical illness claim, such as long-term back problems or stress-related absence.

• Critical illness cover: one lump sum on diagnosis of a defined serious condition; good for clearing debt or funding treatment.
• Income protection cover: regular monthly payments while you cannot work; good for covering everyday bills over a long absence.
• Life insurance: lump sum on death; good for protecting dependants and clearing a mortgage.

If you are self-employed with no sick pay to fall back on, income protection often matters more than a lump sum, because a long illness hits your monthly cash flow hardest. Our guide to life insurance for self-employed people explains why self-employed income needs a different protection mix.

Is critical illness cover worth it?

Critical illness cover is worth it if a serious diagnosis would leave you unable to work and short of money to cover the mortgage, bills or treatment, and you do not have enough savings or sick pay to bridge that gap. It is a form of protection that trades a monthly premium for a lump sum you may never claim, which is why the value depends entirely on your finances and how much risk you can absorb yourself.

The case is strongest for people with a mortgage, dependants, limited savings and no meaningful employer sick pay. A lump sum on diagnosis can clear or reduce the mortgage, buy time to recover without financial pressure, or pay for care and home adaptations. The case is weaker if you have substantial savings, generous long-term sick pay, or no dependants relying on your income.

Cost is a real factor. A combined life and critical illness plan can run well over £100 a month at older ages for a large mortgage, while life-only cover for the same sum is far cheaper. Some buyers reasonably decide the critical illness element is not affordable and prioritise life cover plus a smaller emergency fund. There is no single right answer, but the decision rule is clear: if a serious illness would create a funding gap you cannot self-insure, critical illness cover fills it.

Should I add critical illness cover when reviewing my life insurance?

Add critical illness cover to a life policy when protecting your own income during a serious illness matters as much as protecting your dependants after your death, and your budget can absorb the extra cost. Adding critical illness typically increases the premium noticeably, because it is the more expensive of the two elements.

When reviewing existing life insurance, check whether your circumstances have changed: a new mortgage, children, or becoming self-employed all strengthen the case for adding illness cover. Also check the quality of any critical illness cover on offer, since the condition list and severity wording vary far more between insurers than plain life cover does.

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Can life insurance companies access my medical records?

Life insurance companies cannot access your full medical records without your written consent, but they will ask health questions when you apply and may, with your permission, request a report from your GP under the Access to Medical Reports Act 1988. You have the right to see that report before it is sent and to ask for factual errors to be corrected.

Answering the health questions accurately is essential. If you leave out or misstate a material health fact, the insurer can refuse a claim or void the policy, and any dispute would ultimately be handled by the Financial Ombudsman Service. Critical illness underwriting is often more detailed than for life cover alone, because the insurer is assessing the risk of you developing a serious condition, not just of dying.

If you have been declined critical illness cover, you are not out of options. You may be able to get life-only cover, apply to an insurer that underwrites your condition differently, or seek advice on cover with exclusions for a specific health issue. Being honest at application stage gives you the strongest position if you ever need to claim.

What to check before you buy: a life and critical illness insurance comparison

When you run a life and critical illness insurance comparison, look beyond the monthly price at the condition list, severity definitions, whether premiums are guaranteed or reviewable, and any partial-payout or children’s cover features. Because critical illness cover quality varies far more than life cover, the cheapest quote is not automatically the best value.

• Guaranteed vs reviewable premiums: guaranteed stays fixed; reviewable can start cheaper but rise. MoneyHelper flags this as a key cost driver.
• Condition list and definitions: check the core conditions meet the ABI minimum standards and read the severity wording for cancer and heart conditions.
• Partial and additional payments: some plans pay smaller amounts for less severe conditions without ending the policy.
• Sum assured: make sure a combined lump sum is large enough to do two jobs if it has to cover both a mortgage and living costs.
• Term length: match the term to your mortgage or the years your dependants rely on your income.

Major UK insurers including Aviva, Legal & General, Royal London, Zurich, LV=, Vitality and Guardian all offer critical illness options, and their 2026 plans differ on children’s cover and partial payouts. Comparing quotes across insurers, rather than accepting the first offer, is the practical way to match cover quality to price. For context on how many households actually hold this cover, see our UK life insurance statistics.

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Information correct as of 27 August 2026. Prices, tariffs, policy details and providers change frequently, so please check the latest details before making a decision. This article is for general information only and does not constitute financial advice. Free Price Compare is authorised and regulated by the Financial Conduct Authority (FCA).