Term Assurance vs Whole-of-Life Insurance for Inheritance Tax Planning (2026/27)
Comparing term assurance and whole-of-life insurance as ways to cover a future Inheritance Tax bill in 2026/27, including cost, certainty of payout, and which suits which estate.
Two different tools for two different problems
Both term assurance and whole-of-life insurance can be used to make sure money is available to pay an Inheritance Tax bill, but they are designed for different situations, and choosing the wrong one can leave a gap in cover or waste money on unnecessarily expensive premiums.
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Open Inheritance Tax calculatorTerm assurance: matching a temporary liability
Term assurance pays out only if death occurs within a defined period — commonly 10, 20 or 30 years. Once the term ends, cover simply stops, with no payout and typically no return of premiums if the policyholder is still alive.
This structure is particularly useful for taper relief planning. If you make a large lifetime gift and survive at least seven years, it usually falls outside your estate for IHT entirely. If you die within seven years, the gift may be taxed, but taper relief reduces the effective rate the longer you survive within that window (broadly: full rate in years 0-3, then stepping down through years 3-7). A decreasing term assurance policy, with the sum assured reducing on roughly the same schedule as the tapering tax liability, can be sized to broadly match the shrinking exposure — and because the risk period is fixed and the sum assured falls over time, premiums are relatively low.
Whole-of-life: matching a permanent liability
For most people, the core IHT exposure on their family home, savings and investments does not go away after seven years or any other fixed period — it persists for as long as the estate remains valuable enough to exceed the available Nil Rate Band and Residence Nil Rate Band, which for most families is effectively indefinite. A policy that might lapse before death leaves the family exposed to the full tax bill with no cover in place.
Whole-of-life insurance solves this by guaranteeing a payout whenever death occurs, as long as premiums continue to be paid. This makes it the standard tool for covering an ongoing, permanent IHT liability, typically written on a joint life second death basis for couples, since the bulk of a couple's combined estate typically only becomes chargeable after the second death (the first death usually benefits from the spousal exemption, meaning no IHT is due at that point).
Cost comparison illustration
For the same sum assured, whole-of-life premiums are materially higher than term assurance premiums, because the insurer is certain to pay out eventually rather than only if death occurs within a limited window. As a rough illustration of the underlying principle (exact premiums vary hugely by age, health, sum assured and insurer):
| Feature | Term assurance | Whole-of-life insurance |
|---|---|---|
| Payout certainty | Only if death occurs within the term | Certain, eventually |
| Typical premium (same sum assured) | Lower | Higher |
| Suited to | Temporary liabilities (taper relief on a specific gift, mortgage protection) | Permanent liabilities (ongoing estate IHT exposure) |
| Premium stability | Fixed for the term | Fixed for guaranteed policies; can rise on reviewable policies |
Why writing either policy in trust is essential
Regardless of which type is chosen, if the policy simply pays out to your estate rather than to a trust, the payout itself becomes part of your estate's value and can be taxed at 40% — completely undermining the purpose of taking out the cover in the first place. Writing the policy in trust, using the insurer's standard trust deed in most straightforward cases, ensures the payout goes directly to beneficiaries or trustees and is excluded from the estate calculation.
Which should you choose?
- If you are covering a specific, time-limited exposure — a recent large gift within the seven-year taper window, or a mortgage — decreasing term assurance is usually the more cost-effective choice.
- If you are covering the ongoing IHT exposure on your estate as a whole, which does not naturally reduce over time, whole-of-life insurance, ideally on a joint life second death basis for couples, written in trust, is the appropriate tool.
Many households use both together: term assurance for a specific recent gift, and whole-of-life cover in trust for the enduring liability on the rest of the estate.
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Open Budget Planner calculatorFrequently asked questions
What is the main difference between term assurance and whole-of-life insurance?
Term assurance pays out only if the policyholder dies within a fixed period (for example, 10, 20 or 30 years), after which cover simply ends with no payout if the person is still alive. Whole-of-life insurance has no end date — it is guaranteed to pay out whenever death occurs, as long as premiums are kept up, which is why it costs more.
Which is cheaper, term assurance or whole-of-life insurance?
Term assurance is almost always significantly cheaper for the same sum assured, because the insurer only has to pay out if death occurs within the fixed term, and many policies never claim. Whole-of-life premiums are higher because a payout is certain eventually.
Why would someone use decreasing term assurance for Inheritance Tax planning?
Decreasing term assurance is often used to cover an IHT liability on a lifetime gift that falls under the seven-year taper relief rule, since the potential tax liability reduces the longer the donor survives after the gift, broadly matching a decreasing sum assured to a decreasing tax exposure over the same period.
Why is whole-of-life insurance often preferred for a permanent IHT liability?
Because a typical IHT liability on a family home or long-held assets does not disappear over time in the way a taper-relief-covered gift's liability does — the liability persists for as long as the estate remains above the Nil Rate Band thresholds, which for most people is indefinitely, making a policy with no fixed end date more appropriate.
Does term assurance protect against an IHT bill if I live longer than the policy term?
No. If you outlive the term, the cover simply ends (assuming it is not a whole-of-life or renewable policy), and you would need to arrange new cover, likely at a higher premium reflecting your older age and any changes in health, or go without cover for the remaining IHT exposure.
Can whole-of-life premiums increase over time?
It depends on the policy type. 'Guaranteed' whole-of-life policies fix the premium for life at outset. 'Reviewable' whole-of-life policies are reviewed periodically (commonly every 5 or 10 years) and premiums can increase significantly if the insurer's assumptions about investment returns or mortality change unfavourably.
Should both policies be written in trust for IHT planning?
Yes, in almost all cases. Whether term assurance or whole-of-life, writing the policy in trust keeps the payout outside your estate and avoids it simply creating a new IHT liability on the proceeds themselves, defeating the purpose of the cover.
Is joint life second death cover available on both types?
Yes. Both term and whole-of-life policies can be written on a joint life second death basis for couples, paying out only after both have died — useful because most IHT bills on a couple's combined estate become due only after the second death, when assets typically pass out of any spousal exemption.
Which is better value for a young family covering a mortgage rather than IHT?
For mortgage protection rather than IHT planning, level or decreasing term assurance matched to the mortgage term is usually the more cost-effective and appropriate choice, since the need for cover naturally reduces as the mortgage is paid down, unlike a permanent IHT liability.
Can I combine both types of policy for different purposes?
Yes, this is common. Some people hold decreasing term assurance to cover a specific taper-relief exposure on a recent large gift, alongside a separate whole-of-life policy in trust to cover the ongoing, indefinite IHT liability on the remainder of their estate.
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