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Mortgage protection insurance explained

Written and reviewed by Sanjeev Yoganathan · Last reviewed 10 June 2026

What is mortgage protection insurance?

Mortgage protection insurance is a form of life insurance designed to pay off your outstanding mortgage (or provide similar financial support) if you die during the policy term. It gives your family the ability to stay in the family home if the primary earner passes away.

Level term vs decreasing term

Decreasing term

The sum assured reduces over time, roughly following the outstanding balance of a repayment mortgage. Because the insurer's potential payout reduces over time, premiums are lower than for level term. It is designed specifically to align with repayment mortgage balances.

Level term

The sum assured stays constant throughout the policy period. Premiums are higher than for decreasing term, but the benefit amount does not fall. Level term may be more appropriate for interest-only mortgages (where the balance does not reduce), or where you want the policy to also cover other financial needs such as family income support or inheritance tax planning.

How much cover do you need?

A starting point is to cover the outstanding mortgage balance plus any other debts, plus a buffer for your family's other needs. Use our mortgage protection calculator, which produces a decreasing term schedule and a side-by-side comparison of level vs decreasing approaches.

Single vs joint policy

A joint policy pays out once — on the first death. Two single-life policies cost somewhat more but mean each partner is fully covered. For couples, two policies are often the better long-term solution. Discuss with a regulated adviser who can model the options for your specific situation.

Understanding your mortgage balance

Knowing your outstanding mortgage balance at different points in the term helps you size decreasing term cover accurately. If you'd like to model your mortgage balance or the impact of overpayments, our sister site has a mortgage calculator and a mortgage overpayment calculator on calculators.finance.

Frequently asked questions

Disclaimer

This is a simplified estimate based on the assumptions shown above. It isn't a quote, and a real insurer may arrive at a different figure. Use it as a starting point, then check the details with your insurer or adviser.