How Does Critical Illness Cover Work for a Mortgage? UK 2026
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How Does Critical Illness Cover Work for a Mortgage?

Critical illness cover can clear your mortgage if you're diagnosed with cancer, heart attack, stroke, or dozens of other conditions. Here's how it works.

8 min read Published March 2026

How CIC protects your mortgage

Critical illness cover pays a tax-free lump sum on diagnosis of a covered condition. If you use this money to pay off your mortgage, you eliminate one of your biggest monthly outgoings — giving you financial breathing room to focus on recovery without worrying about losing your home.

How much cover do I need for my mortgage?

A common approach is to match your CIC sum assured to your outstanding mortgage balance. However, many advisers recommend adding 20–30% to cover additional costs such as private treatment, home adaptations, or temporary income replacement while you recover.

Level vs decreasing CIC for mortgages

  • Decreasing CIC — the sum assured reduces over time, mirroring a repayment mortgage. Cheaper premiums, but only covers the mortgage.
  • Level CIC — the sum assured stays fixed. More expensive but provides the same cover throughout the term — useful if you want surplus funds beyond the mortgage.
Tip: If you have a repayment mortgage, decreasing CIC is usually the most cost-effective way to protect it. If you have an interest-only mortgage, level cover may be more appropriate.

Combined life and critical illness for mortgages

Most mortgage lenders don't require you to have CIC — but it's strongly recommended alongside life insurance. A combined policy that pays out on death or serious illness is the most comprehensive mortgage protection available.

Frequently Asked Questions

CIC pays a tax-free lump sum — you can choose to use it to pay off your mortgage, but you are not required to. The money is yours to use as you see fit.

No — CIC pays a lump sum on diagnosis, while mortgage payment protection (MPPI) covers monthly payments during unemployment or illness. They serve different purposes.

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