Whether critical illness cover is worth it depends on what a lump sum on diagnosis would replace for you, and on what you already have to fall back on. It is a monthly cost for a single payment that only a policy's own definitions can trigger, with nothing returned if you never claim, so the answer differs from one household to the next.

Want it priced for your own age, health and chosen amount? The quote form here introduces you to an FCA-authorised broker who can do that; there is no charge, and no obligation to buy.

How the cover itself works is in our guide to critical illness cover, one of our critical illness and income guides. This page is about the decision: what you get for the money, how claims fare, and what else might do part of the same job.

What does critical illness cover pay, and what does it not?

It pays one lump sum, once, if you are diagnosed with a condition your policy lists and the diagnosis meets that policy's definition; MoneyHelper (archived September 2026) says the policy then ends. The money can meet more than lost pay: the same guide points to costs beyond ordinary bills, such as adapting your home or getting to appointments.

It does not pay for an illness the policy does not list, or for a diagnosis that falls short of the wording. The lists differ widely: MoneyHelper says the most comprehensive policies cover 50 different conditions or more, while others are much more limited, and it names non-invasive cancers, high blood pressure and broken bones among common exclusions. Which conditions are covered goes through the detail.

Nothing comes back if you never claim: Legal & General's product page (reviewed 29 January 2026) says its cover has no cash value unless a valid claim is made. The premiums buy protection for the term, used or not.

Nor does it follow your income. It pays on a diagnosis, not on time off work, so an unlisted illness pays nothing however long it keeps you away. That is the main difference from income protection, set out in critical illness cover compared with income protection.

How often does critical illness cover pay out, and why do claims fail?

The Association of British Insurers (ABI) reported on 29 June 2026 that individual critical illness claims came to £1.25 billion in 2025, that 65% of them were for cancer, and that the average payout was £67,000. Those are market totals: they show claims being paid at scale, but not what your own policy would pay. The ABI's headline 97.9% is the share of all individual protection claims paid, life and income protection included, so it says less about critical illness than it first seems to.

Some insurers publish their own rates. Aviva's release of 25 March 2026 says it paid 90.7% of the claims it received for critical illness, children's benefit and total and permanent disability. LV='s look back at 2025 (July 2026) says 90% of its critical illness claims were paid, almost £33m to 444 individuals and families. The two are counted differently, over different books of business, so neither is a reason to pick one insurer over the other; critical illness claims statistics has more.

The reasons for the claims that were not paid are worth knowing before you decide:

  • The definition was not met. Aviva says that where claims in the combined category above could not be paid, the majority were because the diagnosis did not meet the policy definition for the condition. Having a serious illness and meeting the wording are different tests.
  • What was said at application. Aviva also says that for its declined life insurance claims the leading cause was misrepresentation of relevant information, especially about health and lifestyle. That figure is for life cover, but the same duty applies: its Life Insurance+ summary (AL50001, from its adviser library) says you must answer health questions fully, truthfully and accurately or it may amend or cancel the policy or not pay a claim, and MoneyHelper says an inaccurate or undisclosed answer can lead to a rejected claim. See disclosure requirements and when critical illness cover does not pay out.
  • The policy lapsed. Legal & General's summary says cover ends 60 days after the first missed premium, unless the policy expires within that period.

Why does critical illness cover cost more than life cover?

Added to a life policy, it gives the insurer a second reason to pay, and that is charged for: Legal & General's product page says its critical illness cover can be added to its life policies "for an extra cost". The ABI's guide to minimum standards (updated April 2023) says the terms and cost of a policy reflect, among other things, the breadth of conditions covered, so part of what you pay for is the length of the list.

How much more it comes to depends on your age, health, the amount and the term, so the difference is something a quote shows you rather than a number you can know in advance. Each lever that lowers a quote, such as a smaller amount, a shorter term or a narrower list of conditions, also changes what the policy does, so the cheapest way to buy it is rarely a like-for-like saving. What critical illness cover costs takes the factors in turn, and life and critical illness cover shows how the two parts fit together.

To see the difference for your own case, ask for two quotes on the same sum and term, one for life cover alone and one with critical illness added; an FCA-authorised broker reached through the quote form can set the pair side by side.

Is employer critical illness cover enough?

That depends on the scheme, which the employer chooses. Aviva's group critical illness page (WC13019, July 2026) offers employers standard cover for 15 critical illnesses and operations and extended cover that adds 28 others, and says it does not cover pre-existing conditions or conditions relating to them. Set against MoneyHelper's 50 or more for the most comprehensive individual policies, the counts are not like for like, but they show why cover at work is not an answer until you have read it.

Questions to put to your employer or the scheme booklet:

  • Which conditions are covered, and to what definition?
  • How much would it pay, and is that a fixed sum or tied to your pay?
  • Does it carry on if you change job or leave?

MoneyHelper lists a workplace benefits scheme as a reason you might not need your own cover, and Legal & General's page notes that some people rely on an employment benefit package. Whether yours does enough is for you to judge. How the premium is taxed for the employer and employee is on group critical illness cover.

What could do the same job: income protection, sick pay, savings and state benefits?

None of these is a like-for-like substitute, but each answers part of the same worry, and weighing them is most of the decision.

  • Income protection responds to being unable to work rather than to a named diagnosis, and pays regularly rather than once. Whether income protection is worth it is its own question.
  • Sick pay. MoneyHelper says that in reality employees are usually moved onto Statutory Sick Pay within six months, and that state benefits might not be enough to replace your income. Your contract sets any employer sick pay above that.
  • Savings. MoneyHelper says you might not need the cover if your savings could pay ongoing expenses and the extra costs of serious illness. Savings also count against benefits: GOV.UK (read 18 October 2026) says a Universal Credit payment is reduced by £4.35 for every £250 held between £6,000 and £16,000, and that you need £16,000 or less in savings to be eligible.
  • State benefits. GOV.UK (read 18 October 2026) says Employment and Support Allowance pays up to £95.55 a week in the work-related activity group and up to £145.90 a week in the support group, if you qualify.

When is critical illness cover worth it, and when is it not?

This is general information, not a recommendation. The advantages and disadvantages line up like this:

AdvantagesDisadvantages
A lump sum on diagnosis that can meet extra costs, not only lost payPays only for listed conditions that meet the definition
Does not depend on how long you are off workPays once, then the policy ends
Can sit alongside sick pay, savings or an employer schemeAn extra cost on top of life cover, with nothing back if you never claim
Some include children's cover, Aviva's Life Insurance+ among themA claim can fail on the definition, a missed premium or an inaccurate answer

What tips it for a household is usually a short list of questions. Who relies on your income, and for how long? What would savings, sick pay and any workplace cover provide in the first year? Are the conditions you worry about most on the list, and would they meet the wording? Could you keep paying the premium for the whole term? MoneyHelper frames the decision the same way: depending heavily on your income, too little in savings and no employee benefits package are its reasons to consider the cover, and enough savings or an employer scheme are its reasons you might not.

If you do want a figure to weigh, how much critical illness cover you need sets out a method, and critical illness cover for self-employed people covers the case where there is no employer scheme at all.

Frequently asked questions

Is critical illness cover essential?

No rule makes it so. It is optional: Legal & General, for one, offers it as an extra-cost addition to its life insurance. Whether it is worth that cost turns on the questions above.

Is critical illness cover worth it when you are young?

LV='s look back at its 2025 claims gives 51 years old as the average age at the time of a critical illness claim. Buying younger usually costs less for the same cover, but the test does not change with age: who would be stretched if you were seriously ill now, and what you already have to fall back on.

When you are ready to see what cover would cost you and how an insurer might view your health, the quote form is the next step: it puts you in touch with an FCA-authorised broker, free, and asking commits you to nothing.

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