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

Life insurance pays a lump sum when you die during the term, and usually on a terminal diagnosis. Critical illness cover pays a lump sum when you are diagnosed with one of a defined list of conditions and survive a set period, typically 14 days — you receive the money yourself, and the policy is about surviving rather than dying.

Not necessarily, and few budgets stretch to full cover on both. Life cover is the cheaper of the two per pound of benefit and protects against the outcome a family cannot recover from, so it is normally bought first and in full. Critical illness cover is then added at whatever sum assured the remaining budget supports.

How much more expensive is critical illness cover?

Roughly three to four times the price of life cover for the same sum assured. Broker sample quotes put £200,000 of 25-year critical illness cover at about £38 a month for a healthy 30-year-old and about £136 a month at 50, against roughly £18 a month for £250,000 of level term life cover at 35.

How often are critical illness claims paid?

Insurers paid 90.2% of critical illness claims in 2025 — 20,498 claims worth £1.42 billion, average payout £69,375. That is below the 96.7% paid on term life claims, because a critical illness claim depends on the diagnosis matching a written severity definition, and because non-disclosure at application surfaces at claim time.

Is a combined policy or two separate policies better?

A combined "life or earlier critical illness" policy pays once, on whichever happens first, and then ends — so an illness claim in your forties leaves you without life cover, and new cover after a diagnosis may be unaffordable or unavailable. Separate policies cost more but keep the death benefit intact, which usually justifies the extra premium if you have children and a long mortgage.

Should I buy critical illness cover or income protection?

Income protection pays a monthly income for as long as you cannot work, whatever the cause, covering the musculoskeletal and mental-health conditions that drive most long absences and rarely appear on a critical illness list. Critical illness cover pays a lump sum on a named diagnosis whether or not you stop working. If the worry is monthly bills, income protection does more per pound; if it is the mortgage balance, critical illness cover matches it better.

Critical illness cover vs life insurance — do you need both?

By Denissindependent developer, not a financial adviserPublished 18 August 2026 · How we research these guides

The two products are sold together so often that people end up with one when they wanted the other. They insure different events:

Life insurance pays a lump sum when you die during the term, and usually on a terminal diagnosis with less than twelve months to live.
Critical illness cover pays a lump sum when you are diagnosed with one of a defined list of conditions and survive a short period — commonly 14 days.

You can hold either, both, or a single policy that does both. What follows is the case for each, with the claims figures the industry actually publishes and the price gap that decides it for most households.

What the claims data shows

The Association of British Insurers reports what was paid each year. Across 2025 the protection market paid £7.84 billion on 280,992 claims. By individual product:

Individual product	Claims paid	Claims accepted	Average payout
Life insurance (term)	48,055	96.7%	£83,892
Critical illness cover	20,498	90.2%	£69,375
Income protection	18,469	79%	£23,416

Two things fall out of that table.

Critical illness claims are not rare. For every five life claims there were two critical illness claims, and cancer was the most common cause by a distance. Through your working years, being diagnosed with something serious and surviving it is the more likely event.

Critical illness claims are declined more often. A 90.2% acceptance rate is high in absolute terms — nine in ten — but it sits six points below life cover, and the reason is structural. Death is a fact. A critical illness claim turns on whether a diagnosis matches a written definition: how far a cancer has spread, how much permanent damage a stroke left behind. Early-stage and low-severity diagnoses often trigger a smaller partial payment, or none.

The other common reason a claim fails is non-disclosure at application. Answer the medical questions completely, including the awkward ones.

What it costs

This is where the decision is usually made. On the indicative rates behind the calculator, a healthy 35-year-old non-smoker pays roughly £18 a month for £250,000 of level term life cover over 20 years.

Broker sample quotes for critical illness cover — healthy non-smoker, low-risk job — sit at a different level entirely:

Age at application	£200,000 critical illness cover, 25-year term
30	about £38 a month decreasing, £56 level
40	about £74 a month
50	about £136 a month

Like for like, critical illness cover runs three to four times the price of life cover for the same sum assured. That is not a mark-up; it reflects how much likelier the insured event is.

The consequence matters more than the ratio. On a fixed budget, insisting on both at the same sum assured means buying much less of each. Most households are better served by the full life cover they need plus a smaller critical illness amount than by half of both.

Combined policy or two separate ones?

Insurers sell critical illness as an add-on, usually described as "life or earlier critical illness". That "or" is the entire point.

Combined — one sum assured, one premium, one payout. It pays on whichever happens first and then the policy ends. It is materially cheaper than two policies. The risk: a critical illness claim at 42 pays the money and leaves you with no life cover at all, and buying new cover after a serious diagnosis is expensive at best and impossible at worst.

Separate policies — a life policy plus a standalone critical illness policy. More expensive, but an illness claim does not extinguish the death benefit your family may still need. With children and twenty years of mortgage left, that separation is usually worth the extra premium.

There is a middle path any adviser will quote: full life cover with a smaller critical illness amount attached, sized to cover a year or two out of work and the costs an illness brings, rather than the whole mortgage.

Critical illness cover or income protection?

The risk critical illness cover addresses — being too ill to work — is also covered by income protection, which pays a monthly income for as long as you cannot work rather than a single lump sum.

They are not interchangeable:

Critical illness cover pays on a named diagnosis whether or not it stops you working. Being a lump sum, it can clear the mortgage, adapt the house or fund a year off.
Income protection pays on incapacity, whatever the cause — including the musculoskeletal and mental-health conditions that drive most long absences and rarely appear on a critical illness list. A third of income protection claims in 2025 were musculoskeletal. Its 79% acceptance rate is the lowest of the three, because "unable to work" is a harder test than "died".

If the worry is paying the bills, income protection does more work per pound. If the worry is the mortgage balance, critical illness cover matches it better.

Check what work already gives you

Group schemes sometimes attach critical illness cover to death-in-service benefit, and almost always at a lower level than you would buy privately. Whatever is there is still worth subtracting before you buy — see the guide to death-in-service cover. Both end when the job does.

How to decide

Size the death gap first. The calculator totals the mortgage, debts, income replacement and children's costs, subtracts what you already hold, and shows what is missing. See how much life insurance you need.
Buy that amount of life cover in full. It is the cheapest protection per pound and covers the outcome a household cannot recover from.
Then price critical illness cover as an addition, at whatever sum assured the remaining budget supports. Clearing the mortgage is the common target; one to two years of income is the affordable one.
Match the terms to the debt. If the mortgage runs 22 years, so should the cover — see what happens when the term ends.
Answer the health questions in full. Non-disclosure is the main reason claims fail, and it fails them at the worst possible moment.

This is general information, not financial advice. Condition definitions vary more between insurers on critical illness cover than on any other protection product, so compare the condition lists and not only the premiums.