2026-07-28
Life insurance for a mortgage — is the lender’s policy enough?
Short answer: you should cover the whole outstanding mortgage balance, and for most repayment mortgages the right tool is decreasing term cover that falls in line with the balance rather than a fixed sum for the full term. What you should not assume is that the policy offered alongside your mortgage is the cheapest or the most flexible way to get it — you are free to buy cover from any insurer.
This guide goes deep on the mortgage part specifically. If you want the mortgage seen as part of the whole picture — alongside debts, income and children — there is a general guide to how much life insurance you need, or use the calculator directly for a complete figure.
Is life insurance compulsory for a mortgage?
No. There is no legal requirement in the UK to hold life insurance to get a mortgage, and no lender can refuse you a mortgage purely for declining their protection product. Buildings insurance is the cover that is genuinely a condition of most mortgage offers — life cover is not.
That said, "not compulsory" and "not needed" are different things. A repayment mortgage is usually the largest single obligation a household carries, and if you own the property jointly, the survivor is liable for the whole remaining balance, not half of it.
Decreasing term vs level term
This is the main practical decision:
Decreasing term assurance tracks the amortisation of a repayment mortgage — the sum assured falls roughly in step with the outstanding balance. Because the debt genuinely shrinks, this is normally cheaper than a level policy and matches the mortgage need precisely across the term.
Level term assurance keeps the same sum assured throughout. More expensive for pure mortgage cover, but it is the right tool for the other DIME components (income, education), which do not shrink the way a debt does.
A common and sensible combination: decreasing cover matched to the mortgage, plus a separate level policy for income replacement and children.
The exception: interest-only mortgages
If your mortgage is interest-only, or part-and-part, decreasing cover is the wrong shape. The capital balance on an interest-only loan does not fall at all — it sits at the full amount until the end of the term. Cover it with level term for the interest-only portion, and use decreasing cover only against the part that is actually being repaid.
Buying from the lender vs the open market
Protection sold in the same conversation as the mortgage is convenient, and that convenience is most of its appeal. Two things worth knowing:
- The premium is rarely the sharpest available. Life cover is one of the most price-competitive products in UK retail finance, and quotes for the same sum assured and term vary considerably between insurers.
- A policy you arrange yourself is not tied to that specific loan. If you remortgage, move lender, or port your mortgage, your own policy simply continues; a product bundled with a particular mortgage often has to be re-arranged, potentially with fresh health questions at an older age.
Joint policy or two single policies?
If you both own the property and both are named on the mortgage, cover both lives for the full balance, not half each. A joint life first death policy pays out once and then ends — leaving the survivor with no cover and no mortgage protection for the rest of the term.
Two single policies usually cost only slightly more than one joint policy, pay out on each death rather than once, survive a separation intact, and let each of you write your own policy in trust. Most UK advisers recommend two single policies where the budget allows.
Write the policy in trust
Worth not skipping: writing the policy in trust — which most UK insurers arrange free at application — keeps the payout outside your estate for inheritance tax purposes and gets the money to your family without waiting for probate. That timing matters here specifically: mortgage payments do not pause while an estate goes through probate.
A worked example
A couple has a £250,000 repayment mortgage with 25 years left. They choose decreasing cover matched to the amortisation schedule:
| Year | Approximate balance | Mortgage cover needed |
|---|---|---|
| Today | £250,000 | £250,000 |
| Year 10 | about £175,000 | about £175,000 |
| Year 20 | about £70,000 | about £70,000 |
Notice the sum assured falls with the loan — they are not paying for protection they no longer need. This mortgage layer sits on top of a separate level sum for income and children (see the main guide for how the two are worked out together).
What mortgage payment protection is not
Do not confuse life cover with mortgage payment protection insurance (MPPI). MPPI covers your monthly payments for a limited period if you are unable to work through accident, sickness or redundancy. It is a different product solving a different problem, it pays monthly rather than as a lump sum, and it does nothing on death. If you want both, buy both — one is not a substitute for the other.
How to use the calculator
The calculator takes your full outstanding mortgage balance as one of the four DIME components, alongside debts, income and education, and returns a single recommended cover amount. Try the calculator here — enter your current balance, not the original loan amount, for an accurate figure.