Level term vs decreasing life insurance

Level term life insurance pays a fixed lump sum if you die during the policy term. Decreasing term life insurance pays a sum that gets smaller over time. Both are types of term life cover, both end at a chosen date, and neither pays out if you outlive the policy. The right choice usually depends on what you are protecting.

How level term life insurance works

A level term policy fixes the sum assured at the start. You choose a term, say 25 years, and a cover amount, say GBP 250,000. If you die at any point during those 25 years and the claim is valid, the policy pays GBP 250,000. If you survive the term, there is no payout.

Premiums are usually fixed for the term. Some policies offer index-linking, where the sum assured and the premium rise each year roughly in line with inflation.

Level term cover suits situations where the financial need does not fall over time. Common examples include:

• Family protection, where children need supporting for years to come.
• An interest-only mortgage, where the capital owed does not reduce.
• Replacing income, particularly when paired with family income benefit.

How decreasing term life insurance works

A decreasing term policy starts with a chosen sum assured, but that figure falls over the term. The shape of the reduction is usually designed to broadly track a typical repayment mortgage balance over time, taking into account interest at an assumed rate.

Premiums for decreasing term cover are normally lower than for level term cover at the same starting amount, because the insurer is on the hook for less money as the years go on.

Decreasing term cover is most often used to cover a capital and interest mortgage, where the loan reduces each month. It is sometimes called mortgage life insurance, although the policy itself is not tied to a specific mortgage account.

Which is cheaper?

For a given starting sum assured, decreasing term cover is normally cheaper than level term cover. The exact difference depends on age, health, the term, and the insurer.

Cheaper does not always mean better value. The right test is whether the cover matches the size and shape of the financial need.

Which suits a mortgage?

It depends on the mortgage type.

A repayment mortgage suits decreasing term cover. As MoneyHelper explains, with a repayment mortgage you pay off the capital and interest each month, so the balance falls over time. A decreasing term policy is designed to follow a similar curve.

An interest-only mortgage suits level term cover. With interest-only, you pay the interest each month but the capital stays the same until the end of the term. The amount needed to clear the mortgage on death is roughly the same throughout, so a flat sum assured is a closer match.

If you have a mix, for example a part-repayment, part-interest-only mortgage, you can sometimes split the cover into two policies.

Which suits family protection?

For family protection that is not tied to a debt, level term cover is usually a better fit. The cost of replacing your income, supporting a partner, or raising children does not reduce in a smooth straight line as you age, so a falling sum assured may leave a gap later in the term.

Some families combine:

• A decreasing term policy that tracks the mortgage.
• A level term policy for general family protection.
• A family income benefit policy to provide a monthly income for a chosen number of years.

Splitting cover by purpose makes each policy easier to size and easier to review.

Watch out: common pitfalls

A few things catch people out.

• Decreasing term policies use an assumed interest rate. If your mortgage rate is much higher than the assumed rate over time, the cover may fall slightly faster than the loan. That can leave a small shortfall.
• Term length matters. If you set a 25-year term, but later remortgage and extend, your cover may end before the new mortgage does.
• Most term policies have no cash-in value. If you cancel or stop paying, the cover ends and there is no refund of premiums.
• Joint life first death policies pay once, on the first claim during the term. Two single life policies can pay twice if both lives are lost during the term.
• Cover is not guaranteed if you do not answer underwriting questions accurately. The insurer may decline a claim if non-disclosure is found.

What about whole of life cover?

Whole of life insurance is a separate type of policy. It is designed to pay out whenever you die, not just during a fixed term. Whole of life cover is usually more expensive than term cover, because the insurer expects to pay a claim at some point.

For most family and mortgage protection needs, term cover is the simpler and more cost-effective tool. Whole of life is more often used for estate planning, business protection, or legacy planning.

How does it connect to claims?

Protection insurance is designed to pay valid claims under the policy terms. The Association of British Insurers reported that UK protection insurers paid a record GBP 8 billion in combined group and individual protection claims during 2024, and that the proportion of new individual claims paid remained high at 97.9%.

That makes the structure of cover important. A policy that does not match the underlying need can still pay a valid claim, but it may not solve the financial problem you bought it for.

How to decide

A simple way to choose between level term and decreasing term:

• If the debt or cost falls over time, decreasing term cover often fits.
• If the cost stays roughly the same, level term cover often fits.
• If you need both, consider running two policies side by side.

You can also think about the worst case. If you died early in the term, would the payout cover what your family actually owes and needs? If you died near the end, is there still enough left to be useful?

Bottom line

Level term life insurance keeps the sum assured flat, which suits family protection and interest-only debts. Decreasing term life insurance reduces over time and is usually cheaper, which suits a repayment mortgage. The right choice depends on the shape of the need, not just the headline price.

If you would like help choosing between life insurance options, GoInsureMe can talk you through suitable cover for your situation.