The Liquidity Problem at the Heart of Inheritance Tax
Inheritance tax in the United Kingdom is levied at 40% on the taxable value of an estate above the available nil-rate band. For a married couple with a qualifying residential property, the combined threshold can reach £1 million through the standard nil-rate band (£325,000 each) and the residence nil-rate band (£175,000 each). For estates above that threshold, the tax is charged at 40% on the excess.
The tax is due within six months of the date of death.
This timing creates a problem that is not principally about the size of the tax liability. It is about where the money comes from to pay it on schedule. An estate worth £2.5 million may consist primarily of residential and investment property, a defined contribution pension (currently outside the estate, though this position changes from 2027), a share portfolio, and illiquid business interests. The family may have every intention of meeting the tax liability. But accessing £300,000 to £600,000 in liquid cash within six months, while simultaneously navigating probate, asset administration, legal fees, and the practicalities of bereavement, is genuinely difficult.
The forced sale of assets to meet an IHT bill is one of the most common and most avoidable sources of estate value destruction. A property sold under time pressure is rarely a property sold at its optimal value. A share portfolio liquidated at a fixed calendar date, regardless of market conditions, may crystallise losses that a patient seller would have avoided entirely.
Life insurance written in an appropriate trust is the primary structural solution to this problem.
How Life Insurance Solves the IHT Liquidity Problem
A whole-of-life insurance policy written in trust pays a lump sum on the death of the insured, or on the second death in the case of a joint life second death policy. Because the policy is held in trust rather than forming part of the personal estate, the payout:
- Is not itself subject to IHT, as it falls outside the estate entirely
- Bypasses the probate process, making proceeds available rapidly after death
- Can be used directly by the trustees to settle the IHT liability or provide liquidity for the estate without requiring the sale of any underlying assets
The practical result is that the estate can be administered in an orderly manner, with property and investments sold or retained according to the family's long-term wishes rather than dictated by a six-month tax payment deadline.
The setup mechanics work as follows. The policy is established during the policyholder's lifetime. Premiums are paid on a regular basis, typically monthly or annually. Where the premiums meet the criteria for the gifts out of normal expenditure exemption under IHTA 1984 section 21, they can be treated as falling outside the estate for IHT purposes, meaning the premium payments themselves do not create an additional IHT liability over time. On death, the trust receives the policy proceeds and the trustees apply them according to the terms of the trust deed.
Policy Structures: The Four Main Options
Whole-of-life (level cover) Provides a fixed lump sum payable on death, regardless of when death occurs. Premium costs are fixed and predictable over the entire life of the policy. This is the most commonly used structure for straightforward IHT planning where the liability is known and relatively stable.
Whole-of-life (reviewable cover) Premiums are reviewed periodically, typically every 10 years, and may increase if the insurer's mortality or investment assumptions change. Initial premiums are lower than level cover, but long-term cost certainty is reduced. Appropriate for families where affordability in the near term is a constraint but the long-term liability justifies accepting some premium uncertainty.
Joint life second death Pays out on the death of the second of two lives insured, typically spouses or civil partners. This is the appropriate structure for most married couples since IHT between married couples and civil partners is generally deferred until the second death. Joint life second death premiums are materially lower than the combined cost of two separate single-life policies because the insurer is covering the second death, which statistically occurs later.
Decreasing term A policy where the sum assured reduces over time, typically in line with a falling expected IHT liability. Where an active gifting programme is reducing the taxable estate progressively over time, a decreasing term policy can match the falling liability while keeping premiums lower than a level cover alternative.
The Trust Requirement: Why It Is Not Optional
Writing the policy in trust is not a technical nicety. It is the mechanism that makes the strategy work entirely.
Without a trust, the policy proceeds are paid into the estate on death and form part of the taxable estate. A £400,000 policy payout added to a £2 million estate does not help meet the IHT bill. It increases it by £160,000.
With a trust, the proceeds sit entirely outside the estate and are available to the trustees free of IHT. The three most commonly used trust structures for this purpose are:
Discretionary trust Trustees have discretion over which beneficiaries receive what proportion of the proceeds. This provides maximum flexibility if family circumstances change over time, for example if a beneficiary divorces, becomes insolvent, or dies before the policyholder. Discretionary trusts are subject to periodic charges, a 10-year anniversary charge of up to 6% of the trust value, but these are typically modest relative to the IHT saving they facilitate.
Absolute (bare) trust Beneficiaries are named at outset with fixed, irrevocable entitlements. No ongoing trust charges apply. Simpler and cheaper to administer than a discretionary trust, but inflexible if family circumstances change. Appropriate where the beneficiaries and their proportionate entitlements are clear and unlikely to need amendment.
Spousal bypass trust Designed to ensure that policy proceeds, and potentially pension death benefits, pass to children or other family members rather than to the surviving spouse. This prevents those assets from being absorbed into the survivor's estate and becoming subject to a further IHT charge on the second death. Requires careful drafting and should be reviewed in the context of the family's full estate plan.
Establishing a life insurance policy without taking advice on the trust structure is one of the most common and most costly mistakes in this area. The trust must be correctly drafted and established before the policy is put in force.
Understanding Premium Costs: Setting Realistic Expectations
Premium levels depend on the cover amount required, the age and health of the insured at the time of application, smoking status, and the policy structure selected.
Some indicative parameters to calibrate expectations:
- A healthy non-smoking couple aged 55, each seeking £400,000 of joint life second death cover, might expect to pay approximately £3,000 to £6,000 per year in level premiums
- The same couple at age 65 would typically face premiums of £7,000 to £14,000 or more per year
- Significant health conditions, particularly cardiovascular disease, diabetes, or a history of cancer, will increase premiums materially and may require specialist medical underwriting
The relevant evaluative question is not whether the annual premium is large in absolute terms. It is whether the total premium outlay over the remaining lifetime is less than the expected IHT liability it addresses. For most families with a meaningful IHT exposure, the premium represents a significant but clearly rational cost relative to the liability being managed.
Where premiums qualify for the gifts out of normal expenditure exemption, they also reduce the estate in real time with each payment, adding a further layer of IHT efficiency to the arrangement that compounds over a long premium-paying period.
Life Insurance Within a Broader IHT Strategy
Life insurance is a liquidity solution, not an IHT reduction tool. It does not reduce the tax owed. It ensures that the tax can be met promptly, from a source outside the estate, without forcing the sale of assets the family wishes to retain.
It works most effectively as one component of a broader estate plan that may also include:
- A structured gifting programme to reduce the taxable estate progressively through potentially exempt transfers and annual exemptions
- Business property relief qualifying investments, which attract 100% IHT relief after two years under current legislation
- Discretionary trusts for managing intergenerational transfers of specific assets
- Pension planning that accounts for the proposed 2027 changes bringing defined contribution pensions within the scope of IHT for the first time
At Celerey, we help clients understand which combination of tools is appropriate for their estate at each stage of life. Ensuring that liquidity is never the constraint that forces a bad outcome for the families our clients have spent a lifetime building wealth for is one of the most concrete contributions good planning makes.