When protecting your family's financial security, two insurance products often come up: critical illness cover and income protection insurance. Despite sounding similar, they work in fundamentally different ways. Critical illness cover pays a tax-free lump sum on diagnosis of a specified serious illness. Income protection pays a regular monthly income while you cannot work. Both have value, but the right choice depends on your specific circumstances, your existing coverage, and your financial priorities. Understanding the difference is the first step to making the right decision. Our income protection guide and life insurance guide cover each product in detail.
Critical Illness Cover: How It Works
Critical illness cover pays a tax-free lump sum if you are diagnosed with one of the illnesses specified in your policy. The most commonly covered conditions include heart attack, stroke, cancer (though some early-stage cancers are excluded), multiple sclerosis, Parkinson's disease, and loss of limbs or sight. Some policies cover 50+ conditions; others cover fewer. The lump sum can be used for anything — medical treatment, mortgage payments, home adaptations, or simply maintaining your lifestyle. However, critical illness cover only pays out on diagnosis of a listed condition — it does not pay out if you are unable to work for a condition that is not listed, or for an injury that does not fall within the policy definitions.
Income Protection: How It Works
Income protection pays a regular monthly income (typically 50-70% of your salary) for as long as you are unable to work due to illness or injury, up to the policy's maximum term. It covers a much wider range of conditions and injuries than critical illness cover — essentially any illness or injury that prevents you from doing your job, whether or not it is specifically listed. The monthly payment continues until you return to work, reach retirement age, or the policy ends, providing ongoing financial security. The trade-off is that payments stop when you return to work, even if you are earning less than before. Unlike the lump sum from critical illness cover, the monthly income cannot be used for one-off expenses like paying off a mortgage.
Which Is Better: Critical Illness or Income Protection?
For most UK families, income protection is more valuable than critical illness cover because it covers a much broader range of situations. However, both products serve different purposes and the ideal approach for many families is to have both. Income protection provides ongoing monthly income that replaces your salary — essential if you are the primary earner. Critical illness cover provides a lump sum for specific serious conditions — useful for covering large one-off costs or topping up income. If you must choose between them: if you have no employer sick pay and could not survive on SSP (£123.25/week in 2026/27), income protection is the priority. If your employer provides good sick pay and you want protection against specific serious illnesses, critical illness cover may be more appropriate.
- Income protection: broader coverage, monthly payments, better for loss of earnings
- Critical illness: lump sum for specific conditions, good for one-off expenses
- Best approach for most families: income protection plus critical illness cover
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