What is the main difference between term and whole of life insurance?

Term life covers a fixed period and pays out only if you die within it, with no refund if you outlive it. Whole of life covers you for as long as you live, so a payout is certain eventually, which is why it costs several times more for the same sum assured.

Why is whole of life insurance so much more expensive?

Term life insures you against a probability - dying within a fixed window that most people survive. Whole of life insures a certainty - that you will eventually die - so the premium reflects a guaranteed future payout rather than a possible one.

Is whole of life insurance worth it for a mortgage?

Usually not. A mortgage is a temporary obligation with an end date, and term cover matched to that date is normally far cheaper than lifetime cover for the same amount.

When does whole of life insurance make sense?

When the need is genuinely permanent: guaranteed funeral costs, an inheritance tax liability your estate will owe regardless of when you die, or a dependant who will never become financially independent.

Does whole of life insurance build cash value?

Some versions do, though this is far less common and typically smaller in the UK market than in markets like the US. It is a different product feature from the core death benefit, and is worth checking policy by policy rather than assuming.

Term life insurance vs whole of life insurance: what the extra cost buys

By Denissindependent developer, not a financial adviserPublished 29 August 2026 · How we research these guides

Two products get compared on the same page constantly, and priced completely differently. For a healthy 35-year-old non-smoker insuring £250,000:

	Monthly premium
20-year level term	about £18
Whole of life	typically several times more

Same sum assured, a very different price. Any argument for whole of life has to justify that multiple, because the alternative use of the difference is not nothing.

What each product actually is

Term life insurance covers a fixed period - 10, 20 or 30 years - with a level premium and a level payout. Die within the term and it pays out. Outlive it and the cover simply ends, with no refund and no cash value. It is insurance in the strict sense: protection against a risk over a window, not a savings vehicle. See what happens when the term ends for the full picture of that moment.

Whole of life insurance covers you for as long as you live, however long that turns out to be, in exchange for a premium that is either fixed for life or reviewed periodically depending on the policy. Because a payout is certain eventually rather than merely possible within a window, the insurer prices it very differently, and some versions build a cash value you can access.

Why term is so much cheaper

Level term at 35 insures a 35-to-55-year-old, and the probability of dying within that particular window is low, so premiums from the many who survive fund the payouts for the few who do not. Whole of life insures you for the year you eventually die, whenever that is, which is a certainty rather than a probability, and the premium reflects that.

Where whole of life genuinely fits

The list of good reasons is short, and specific:

Guaranteed funeral or inheritance tax cover. A payout that is certain to happen eventually suits a certain, eventual cost - funeral expenses, or an inheritance tax bill your estate will owe regardless of when you die. See is life insurance taxable for how a policy written in trust keeps that payout outside your estate rather than adding to the bill.
A dependant who will never become financially independent. A child with a lifelong disability needs support whenever you die, not just within a fixed term.
You have a permanent need and have already sized the temporary one. Whole of life is rarely the right tool for replacing income during working years or covering a mortgage with an end date - that is what term is built for.

If none of these describes you, a temporary need - a mortgage, an income gap while children are dependent - is exactly what term cover is priced for.

The trap: buying whole of life for a temporary need

The most common mistake is buying whole of life cover to protect a 25-year mortgage, paying a premium sized for lifetime cover for a need that will end in 25 years. See life insurance for a mortgage for sizing a mortgage-length term policy correctly instead, at a fraction of the cost.

How to decide

Size the temporary need first, using the calculator, and cover it with term. See how much cover you actually need.
Ask whether a genuinely permanent need exists from the list above - guaranteed final expenses, a lifelong dependant, or an inheritance tax liability.
If it does, size that separately. It is usually far smaller than the income-replacement figure, because it is not trying to replace a salary.
Compare term cost by age using the cost guide before assuming whole of life is the only way to guarantee a payout.

This is general information, not financial advice. Get a quote for both structures before deciding, since pricing varies by insurer and health.