TL;DR: Life insurance written in trust is a widely used mechanism for funding an anticipated inheritance tax liability without increasing the taxable estate. The proceeds sit outside the estate, pay directly to trustees, and can be used to settle the IHT bill without forcing heirs to sell assets. Whole-of-life policies dominate IHT planning because the liability arises on death whenever it occurs. Gift inter vivos policies address the taper period following large lifetime gifts.
KEY FACTS
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How inheritance tax creates a life insurance need
Inheritance tax in the UK is charged at 40% on the value of a deceased person's estate above the applicable nil-rate band. For the 2025 to 2026 tax year, the standard nil-rate band is £325,000 per individual. The residence nil-rate band of £175,000 applies additionally where a qualifying residential property passes to a direct descendant - giving a combined effective nil-rate band of £500,000 per individual, or up to £1 million for a married couple or civil partners who transfer unused nil-rate band on the first death (HMRC IHTM46000). Estates above these thresholds face a tax bill at 40% on the excess. For an estate valued at £1.5 million held by a single individual with no transferable nil-rate band, the IHT liability would be calculated on £1.175 million (£1.5 million minus £325,000), generating a tax bill of £470,000. This bill must be paid to HMRC before probate is granted and before assets can be distributed to beneficiaries. If the estate consists primarily of property, a business, or other illiquid assets, the heirs face a forced sale to fund the tax - or must take a grant of credit from HMRC to delay payment while selling. A life insurance policy written in trust provides liquid cash to fund this liability at death without requiring asset sales.
Writing life insurance in trust: the mechanism
A life insurance policy that is not written in trust forms part of the policyholder's estate on death. The proceeds are assessed as part of the estate for IHT purposes, potentially increasing the tax bill that the policy was intended to fund - a self-defeating outcome. A policy written in a suitable trust is a separate legal arrangement. The policyholder assigns the policy to the trust at outset, naming trustees (commonly the insured and additional family members) and beneficiaries. On death, the policy proceeds are paid to the trustees and administered for the benefit of the named beneficiaries according to the trust deed. Because the policy was assigned to the trust, it does not form part of the deceased's estate for IHT purposes. HMRC's Inheritance Tax Manual at IHTM06000 sets out the treatment of life insurance in trust and confirms that where a policy is properly constituted within a trust, the proceeds are excluded from the estate, subject to the gift with reservation of benefit rules under Finance Act 1986 (gov.uk/hmrc). The trust structure must be correctly established - a policy that is nominally assigned to trust but over which the policyholder retains practical control or benefit may be treated as a gift with reservation and pulled back into the estate.
Whole-of-life versus term cover for IHT planning
The choice between whole-of-life and term life insurance for IHT planning is driven by the nature of the liability being covered. An IHT liability arises on death - but unlike a mortgage, which is extinguished at a defined point when the term ends, an IHT liability exists for as long as the estate remains above the nil-rate band threshold and arises whenever death occurs. A term life insurance policy expires at the end of the policy term - if the policyholder is still alive at the end of a 25-year term, the policy has no value and the IHT liability is uninsured at the point of death. A whole-of-life policy provides cover for the entirety of the policyholder's life, with no expiry date, paying the sum assured on death whenever it occurs. For IHT planning purposes, whole-of-life policies are the dominant instrument because they guarantee a payout on death regardless of longevity. Whole-of-life policies are more expensive than term policies for the same initial sum assured because the insurer is guaranteed to pay out eventually. Reviewable whole-of-life policies allow the premium to be reassessed periodically and may increase substantially at review dates - guaranteed whole-of-life policies fix the premium for life at a higher initial level. For long-term IHT planning, a guaranteed premium structure provides certainty of cost over the full planning horizon.
Gift inter vivos policies and the seven-year taper
Potentially exempt transfers (PETs) are lifetime gifts made to individuals that are exempt from IHT if the donor survives seven years from the date of the gift. If the donor dies within seven years, the gift becomes chargeable and IHT applies on a tapered basis - 100% of the IHT rate applies if death occurs within three years; tapering relief reduces the effective rate from year three to year seven until the gift is fully exempt at the seven-year point (HMRC IHTM14000). For large lifetime gifts - a transfer of property, a lump sum to children, or a contribution to a trust - the donor faces a diminishing but real IHT liability during the seven-year taper period. A gift inter vivos policy is a decreasing term life insurance policy specifically designed to match this diminishing liability. The sum assured decreases in line with the taper relief schedule - in the first three years it remains at the full IHT value of the gift; it then decreases in steps aligned with the taper percentages until it reaches zero at year seven. The policy is written in trust for the benefit of the gift recipient or their estate, ensuring that if the donor dies within the taper period, the tax liability is funded without recourse to the recipient's assets.
Calculating the appropriate sum assured for IHT cover
Calculating the sum assured required for an IHT-funding life insurance policy requires an estimate of the anticipated IHT liability on death. This involves assessing the current estate value, applying the applicable nil-rate bands, deducting any reliefs available - including business property relief under the Inheritance Tax Act 1984 for qualifying business assets and agricultural property relief for qualifying farmland - and applying the 40% rate to the taxable excess. For estates involving illiquid assets, it is the cash equivalent of the IHT that matters - the policy should provide sufficient liquid proceeds to pay the tax bill without forcing asset sales. Estate values change over time - property values, investment portfolio values, and business valuations all fluctuate - and the IHT liability calculation may need to be revisited periodically. Some individuals use a combination of a whole-of-life policy for a base IHT estimate and additional term layers to cover anticipated estate growth. HMRC's frozen nil-rate band, confirmed to remain at £325,000 until at least April 2030, means the IHT liability for estates above this level is likely to remain significant or grow in real terms as asset values increase (gov.uk/inheritance-tax). Professional advice from a solicitor or FCA-regulated financial adviser is essential for IHT planning given the complexity of trust law, tax law, and insurance structuring involved.
Practical steps: establishing an IHT life insurance arrangement
The process of establishing a life insurance policy in trust for IHT purposes involves several coordinated steps. The policy must be selected - typically a whole-of-life policy with a sum assured reflecting the anticipated IHT liability and a premium structure appropriate to the policyholder's age and health. The trust deed must be drafted - most insurers provide standard discretionary trust deeds for this purpose, though the adequacy of a standard deed for complex estates should be confirmed with a solicitor. Trustees must be appointed and must accept their appointment in writing. The policy is assigned to the trust at or shortly after inception - a policy that is initially taken out in the policyholder's own name and later assigned to trust is technically a gift for IHT purposes and must be assessed accordingly. Premiums paid by the policyholder into the trust are potentially exempt transfers if they qualify as gifts from surplus income under the HMRC gifts from income exemption, which can be a tax-efficient funding mechanism for ongoing premiums (HMRC IHTM14250, gov.uk/hmrc). All of these steps have legal and tax implications that are specific to individual circumstances and require professional advice.
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Frequently Asked Questions
Does writing a life insurance policy in trust keep it outside my estate for IHT?
Yes, provided the trust is correctly constituted and the policyholder does not retain a gift with reservation of benefit over the policy. HMRC IHTM06000 confirms that life insurance held in a properly structured trust is excluded from the deceased's estate for IHT purposes. The trust must be established correctly - incorrect structuring can result in the policy being pulled back into the estate.
What is the nil-rate band for inheritance tax in 2026?
The standard nil-rate band is £325,000 per individual for the 2025 to 2026 tax year, frozen at this level until at least April 2030. The residence nil-rate band of £175,000 applies additionally where a qualifying residential property passes to direct descendants, giving a combined effective threshold of up to £500,000 per individual and £1 million for married couples or civil partners (HMRC, gov.uk/inheritance-tax).
Why is whole-of-life insurance preferred over term for IHT planning?
An IHT liability arises on death regardless of when it occurs. A term policy expires at a defined date - if the policyholder survives the term, the liability is uninsured. A whole-of-life policy has no expiry date and guarantees a payout on death whenever it occurs, making it the structurally appropriate product for funding a liability that arises at death.
What is a gift inter vivos life insurance policy?
A gift inter vivos policy is a decreasing term life insurance policy designed to cover the diminishing IHT liability on a potentially exempt transfer during the seven-year taper period. The sum assured decreases in line with the taper relief schedule, providing cover proportionate to the actual IHT exposure at each point during the seven years following a large lifetime gift.
Can I use life insurance premiums as tax-exempt gifts?
Premiums paid into a trust policy may qualify as exempt gifts from surplus income under HMRC's normal expenditure out of income exemption (IHTM14250), provided they are paid regularly from income rather than capital and do not affect the donor's standard of living. This exemption has specific conditions and its application to individual circumstances requires confirmation with a tax adviser or solicitor.
How We Verified This Guide
This guide was researched against primary UK sources including HMRC Inheritance Tax guidance (gov.uk/inheritance-tax), HMRC Internal Manual IHTM06000, IHTM14000, IHTM14250, and IHTM46000 (gov.uk/hmrc), Finance Act 2017 via legislation.gov.uk, Finance Act 1986 (gift with reservation provisions), Inheritance Tax Act 1984, and HMRC IHT receipts statistics. Last reviewed May 2026 by Chandraketu Tripathi, finance editor at Kaeltripton.
