Decreasing term life insurance explained

Decreasing term life insurance pays a lump sum if you die during the policy term, but the amount of cover reduces over time. It is a type of term life cover, it ends on a chosen date, and it pays nothing if you outlive the term. The defining feature is the falling sum assured, which is usually designed to broadly track a repayment mortgage as it is paid down.

What is decreasing term life insurance?

Decreasing term life insurance is term cover where the sum assured reduces over the policy term. You pick a starting cover amount and a term length, and from there the amount that would be paid on a valid claim falls year by year. It is sometimes called mortgage life insurance, although the policy itself is not linked to a specific mortgage account.

Because the cover shrinks, the policy is built around debts and costs that also shrink. A repayment mortgage is the classic example: every monthly payment chips away at the balance, so the amount needed to clear it on death falls over time too.

How does decreasing term life insurance work?

The sum assured reduces each year along a curve based on an assumed interest rate, so it broadly mirrors how a repayment mortgage is paid down. You choose the starting amount and the term, and the insurer sets the rate at which the cover falls.

For example, a policy might start at GBP 200,000 and reduce gradually to near zero over a 25-year term, following roughly the same shape as a repayment mortgage of that size. If you die in year three, the payout is close to the starting amount; if you die in year twenty, it is much smaller, because by then the mortgage it was designed to cover would also be much smaller.

Premiums are normally fixed for the term, even though the cover is falling. You do not pay less each year as the cover reduces.

How is decreasing term life insurance priced?

Decreasing term cover is usually cheaper than level term cover for the same starting sum assured. Because the potential payout falls as the years pass, the insurer is on the hook for less money over time, so it carries a lower average risk and the premium is generally lower.

That said, price still depends on the same personal factors as any life policy: your age, smoking status, health and lifestyle, the term length and the cover amount. For a full picture of what shapes a premium, see our guide on how much life insurance costs.

Who does decreasing term life insurance suit?

Decreasing term cover suits people protecting a debt that reduces over time, most commonly a repayment mortgage. As MoneyHelper explains, with a repayment mortgage you pay off the capital and interest each month, so the balance falls. A decreasing term policy is designed to follow a similar curve, which means you are not paying for more cover than the debt requires.

It is a weaker fit for needs that stay flat or do not reduce smoothly, such as:

• Replacing income or supporting children, where the cost does not fall in a straight line.
• An interest-only mortgage, where the capital owed stays the same until the end of the term.
• General family protection that is not tied to a specific shrinking debt.

Some families run a decreasing term policy for the mortgage alongside a level term policy for wider protection.

How does it differ from level term?

The key difference is the shape of the cover: decreasing term reduces over time, while level term stays the same. That single difference drives the price and the best use for each.

Feature	Decreasing term	Level term
Sum assured	Falls over the term	Stays the same
Typical cost	Usually cheaper	Usually more expensive
Best suited to	Repayment mortgage	Family protection, interest-only debt
Premiums	Usually fixed	Usually fixed
Payout if you outlive term	None	None

For a deeper comparison, including how to match each to your mortgage type, see our guide on level term vs decreasing life insurance.

What are the pros and cons?

Decreasing term cover has clear strengths and some limits.

Pros:

• Usually cheaper than level term for the same starting amount.
• A close match for a repayment mortgage, so you are not over-insured.
• Simple, with fixed premiums for the term.

Cons:

• Cover falls over time, which can leave a gap if your need does not reduce.
• It uses an assumed interest rate, so if your mortgage rate is much higher over time, the cover may fall slightly faster than the loan and leave a small shortfall.
• Like all term cover, it has no cash-in value and pays nothing if you outlive the term.

Bottom line

Decreasing term life insurance is term cover with a sum assured that reduces over time, usually to track a repayment mortgage, and it is normally cheaper than level term as a result. It suits a falling debt well, but is a weaker fit for needs that stay flat.

If you would like help deciding whether decreasing or level cover fits your situation, GoInsureMe can talk you through suitable life insurance options.