Income protection vs critical illness cover: how they differ

Both policies pay out after illness or injury, but they respond to different events and pay in different ways. This guide puts income protection vs critical illness cover side by side, whether you are employed or self-employed.

It then shows how sick pay, benefits and savings change the picture, and what can go wrong when you claim.

Jump to information on:

• The key differences
• How income protection works
• How critical illness cover works
• Which fits your situation
• Having both
• When a claim falls short
• FAQs

The key differences at a glance

The main difference is what starts a claim. Income protection pays when illness or injury means you cannot work, as your policy defines it. Critical illness cover pays when you are diagnosed with a condition your policy lists. Terms vary between insurers, so treat this table as a guide.

	Income protection	Critical illness cover
What starts a claim	You cannot work because of illness or injury, as your policy defines it	You are diagnosed with a listed condition, at the severity your policy sets
How it pays	Regular payments, a share of your income	One tax-free lump sum
How often you can claim	As many times as you need while the policy lasts	Once, then the policy ends
When payments start	After your deferred period	When your claim is accepted
Most common cause of claims in 2025	Musculoskeletal conditions (33% of claims)	Cancer (65% of claims)
Average claim paid in 2025	£10,700	£67,000

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The 2025 claims figures cover individual policies and come from the Association of British Insurers. The other rows are explained, with sources, in the next two sections.

How income protection works

An income protection policy replaces part of your income if illness or an accident stops you working. The Financial Ombudsman Service says policies usually pay 50% to 75% of your income from before you became ill, less state benefits and any income from similar policies.

MoneyHelper, the government-backed guidance service, says it covers most illnesses that leave you unable to work, and you can claim as many times as you need while the policy lasts.

Payments start after a waiting time called the deferred period. The same guide lists 4, 13 and 26 weeks or a year as the most common, and a longer wait means lower premiums.

The Ombudsman also describes a policy that runs for a fixed term, such as up to retirement age, without yearly renewal. On a policy like that, once a claim is accepted, benefits continue until you can return to work, retire or die. Check your wording for how long payments can last on each claim.

Your policy also defines what being unable to work means. The Ombudsman sets out three levels:

• Own occupation, which is the job you did just before you became ill or injured.
• Any suited occupation brings in other roles that your qualifications, skills and experience fit.
• The strictest is any occupation at all.

Some policies use the own occupation test for 12 or 24 months, then change to a different definition.

How critical illness cover works

Critical illness cover pays a lump sum if you are diagnosed with one of the serious illnesses listed in your policy. The Ombudsman’s critical illness page says all policies include cancer, heart attack and stroke. Some may not cover every type of those illnesses.

MoneyHelper’s critical illness guide adds that the lump sum is tax-free and paid once, after which the policy ends. The widest policies cover 50 or more conditions. Examples include multiple sclerosis, Parkinson’s, Alzheimer’s, major organ transplant and traumatic head injury.

Some policies pay a smaller amount, such as 25% of the lump sum, for a less severe condition. Some also pay if one of your children is diagnosed with a specified condition.

Severity matters as much as the name of the illness. In one case study on the same Ombudsman page, a policyholder’s heart attack was not severe enough to meet his policy’s definition.

Which fits your situation

It depends on what else you would have to live on, and what you can pay for yourself.

If you only get Statutory Sick Pay

Since 6 April 2026, your employer pays Statutory Sick Pay (SSP) from your first full day off sick, with no minimum earnings. The change came in the Employment Rights Act 2025. It took effect across the UK under commencement regulations made in March 2026.

GOV.UK says SSP is £123.25 a week or 80% of your normal weekly earnings, whichever is lower, for up to 28 weeks. You also need to meet the eligibility rules, which include being classed as an employee and having done some work for your employer.

If your employer pays sick pay for months

Check how long your employer’s sick pay lasts and what your benefits include. MoneyHelper’s income protection guide says you might not need this cover if you could get by on sick pay for 12 months or more. A deferred period can be set to end when your sick pay does. Check your benefits for critical illness cover too.

If you’re self-employed

SSP is only for employees, so it will not apply to you. In Great Britain, you can apply for New Style Employment and Support Allowance (ESA) instead. GOV.UK says you need to have paid enough National Insurance, usually in the last 2 to 3 years.

The ESA assessment rate is up to £75.65 a week if you are under 25, or £95.55 if you are 25 or over. It normally applies for 13 weeks while your claim is assessed. In Northern Ireland, New Style ESA is claimed through nidirect, which sets the same National Insurance test.

Check how any income protection policy defines your earnings. The Ombudsman’s guidance for insurers lists the definition of earnings for self-employed people among the issues behind income protection complaints.

If you have a mortgage or dependants

Income protection can help with monthly bills, including the mortgage, while you cannot work. A critical illness lump sum can clear part of a debt, but only if your condition is on the list. Mortgage payment protection insurance and life insurance cover other risks.

Quotezone’s guide to life insurance for a mortgage explains how cover can be set against a loan. How much cover you need depends on your own costs.

If you have savings or a partner’s income

You may need less cover, or none. MoneyHelper’s income protection guide says you might not need it if state benefits, savings, early retirement or support from family would cover your outgoings. Its critical illness guide makes the same point about savings that would meet your bills and the extra costs of a serious illness.

Can you have both?

Yes. The two cover different events, so one diagnosis can lead to a claim on both if each policy’s terms are met. Critical illness cover is often taken out alongside other insurance, such as life insurance or income protection, according to MoneyHelper.

If you hold both, read each wording on its own terms. A claim is assessed against the definitions in the policy it is made on, not the other one.

When a claim falls short

A claim can pay less than you expected, or nothing.

A long illness is not always on the list. If a back condition keeps you off work for a year, critical illness cover would pay only if its wording listed that condition. Income protection can pay once your deferred period ends.

Severity can also count against a claim. A diagnosis that falls short of the policy’s definition may lead to a partial payment or none, as in the heart attack case above.

With income protection, the test of being unable to work matters most. An any-occupation definition is the hardest to meet, and some policies change definition after 12 or 24 months.

Your answers when you apply matter too. Section 2 of the Consumer Insurance (Disclosure and Representations) Act 2012 applies across the UK. It says you must take reasonable care not to make a misrepresentation to the insurer.

If a claim is refused, complain to your insurer first. The Ombudsman says the insurer has eight weeks to give a final response for most complaints. If you are unhappy with it, or get none, you can go to the Ombudsman. It checks whether a critical illness insurer followed industry guidelines and was clear about what the policy covers.

When you have weighed the two against your own situation, you can compare income protection quotes from UK insurance providers on Quotezone with one short form.

Providers shown on Quotezone’s income protection page include BPS and Sage Financial. Seopa Ltd, trading as Quotezone, is authorised and regulated by the Financial Conduct Authority (registered number 313860).

You might also need

• Life insurance: pays out when you die, and critical illness cover can be taken out alongside it.
• Mortgage payment protection insurance: covers your mortgage payments for a set period after an accident, sickness or unemployment.
• Private medical insurance: helps pay for private treatment rather than replacing your income.

Income protection and critical illness FAQs

Does critical illness cover pay out for mental health?

Critical illness cover pays only for the conditions your policy lists, so check the wording for any mental health condition. Income protection can pay if a mental health condition stops you working. Mental health claims made up 19% of the money paid on individual income protection claims in 2025, according to insurer claims data.

Is income protection tax-free?

For a policy you take out yourself, usually yes. Section 735 of the Income Tax (Trading and Other Income) Act 2005 makes the payments free of income tax if your premiums were not tax-deductible. Other conditions apply, and the Act covers the whole UK. If your cover comes through work, ask your employer how it is taxed.

How many protection claims do insurers pay?

Most are paid. Insurers paid 97.9% of individual life, income protection and critical illness claims in 2025, according to insurer claims data for 2025. That figure covers all three products together, so it is not a claims rate for either policy on its own.

Sources

1. Association of British Insurers, “Protection insurers pay out £7.84 billion to help customers safeguard their finances”, https://www.abi.org.uk/media-hub/news-post/protection-insurers-pay-out-7-84-billion-to-help-customers-safeguard-their-finances. Published 29 June 2026. Accessed 13 October 2026.
2. MoneyHelper (Money and Pensions Service), “What is income protection insurance?”, https://www.moneyhelper.org.uk/en/everyday-money/insurance/what-is-income-protection-insurance. No date displayed. Accessed 13 October 2026.
3. Financial Ombudsman Service, “Income protection insurance” (guidance for businesses), https://www.financial-ombudsman.org.uk/businesses/resolving-complaint/complaints-deal/insurance/medical-insurance/income-protection-insurance. Accessed 13 October 2026.
4. Financial Ombudsman Service, “Critical illness cover”, https://www.financial-ombudsman.org.uk/consumers/complaints-can-help/investments/critical-illness-cover. Accessed 13 October 2026.
5. MoneyHelper (Money and Pensions Service), “What is critical illness cover?”, https://www.moneyhelper.org.uk/en/everyday-money/insurance/what-is-critical-illness-cover. No date displayed. Accessed 13 October 2026.
6. legislation.gov.uk, “Employment Rights Act 2025, Part 1, statutory sick pay”, https://www.legislation.gov.uk/ukpga/2025/36/part/1/crossheading/statutory-sick-pay. Accessed 13 October 2026.
7. legislation.gov.uk, “The Employment Rights Act 2025 (Commencement No. 3 and Transitional Provisions) Regulations 2026 (SI 2026/373)”, https://www.legislation.gov.uk/uksi/2026/373/made. Made 25 March 2026. Accessed 13 October 2026.
8. GOV.UK, “Statutory Sick Pay (SSP): what you’ll get”, https://www.gov.uk/statutory-sick-pay/what-youll-get. Accessed 13 October 2026.
9. GOV.UK, “Statutory Sick Pay (SSP): eligibility”, https://www.gov.uk/statutory-sick-pay/eligibility. Accessed 13 October 2026.
10. GOV.UK, “Employment and Support Allowance (ESA): eligibility”, https://www.gov.uk/employment-support-allowance/eligibility. Accessed 13 October 2026.
11. GOV.UK, “Employment and Support Allowance (ESA): what you’ll get”, https://www.gov.uk/employment-support-allowance/what-youll-get. Accessed 13 October 2026.
12. nidirect, “Employment and Support Allowance”, https://www.nidirect.gov.uk/articles/employment-and-support-allowance. Accessed 13 October 2026.
13. legislation.gov.uk, “Consumer Insurance (Disclosure and Representations) Act 2012, section 2”, https://www.legislation.gov.uk/ukpga/2012/6/section/2. Accessed 13 October 2026.
14. legislation.gov.uk, “Consumer Insurance (Disclosure and Representations) Act 2012, Schedule 1”, https://www.legislation.gov.uk/ukpga/2012/6/schedule/1. Accessed 13 October 2026.
15. legislation.gov.uk, “Income Tax (Trading and Other Income) Act 2005, section 735”, https://www.legislation.gov.uk/ukpga/2005/5/section/735. Accessed 13 October 2026.
16. Financial Conduct Authority, “FCA Handbook, ICOBS 7.1 The right to cancel (ICOBS 7.1.1R)”, https://handbook.fca.org.uk/handbook/icobs7/icobs7s1. Accessed 13 October 2026.
17. Financial Conduct Authority, “MS24/1.5 Market study into the distribution of pure protection products to retail customers: Final Report” (para 1.1), https://www.fca.org.uk/publication/market-studies/ms24-1-5-final-report.pdf. Published September 2026. Accessed 13 October 2026.

This article is intended as generic information only and is not intended to apply to anybody’s specific circumstances, demands or needs. The views expressed are not intended to provide any financial service or to give any recommendation or advice. Products and services are only mentioned for illustrative rather than promotional purposes.