Interest in Possession Trusts: How They Work and How They Are Taxed

Tax Queen

Tax Expert @ Pie

8 min read

An interest in possession trust gives one person, the life tenant, a legal right to the income while someone else inherits the capital later, most often used in second marriages or to support a vulnerable relative. This guide explains how HMRC taxes it: trustees pay basic rate tax and issue an R185, the life tenant reports the income at their own rate with credit for tax already paid, and capital gains stay with the trustees at 24%. For inheritance tax everything turns on whether the interest qualifies, which decides between the trust sitting in the life tenant's estate or falling into the relevant property regime with its 10-year charges. It also covers registration and filing, when mandating income removes a return entirely, and the April 2026 and April 2027 changes. Written for life tenants and trustees, including low-income life tenants who may be owed a repayment they have never claimed. 

The Arrangement in One Sentence

An interest in possession trust splits a pot of assets in two. One person gets the income now. Somebody else gets the capital later.

The person entitled to the income is the life tenant. The people who receive the capital when that interest ends are the remaindermen. The trustees hold and manage the assets in between, and their discretion over the income is essentially nil, because the life tenant has a legal right to receive it as it arises.

That last point is what separates this from a discretionary trust. Trustees of a discretionary trust choose who gets what. Trustees of an interest in possession trust have no such choice over income. It belongs to the life tenant, whether they want it or not.

Where You Actually Meet One

The classic example is a second marriage. A husband wants his wife to be financially secure for the rest of her life, but wants the house and investments to pass to his children from a first marriage eventually. A will trust giving her an interest in possession achieves both. She receives the rent or investment income and can often live in the property, and on her death the capital goes to his children rather than into her estate for her own beneficiaries to inherit.

Other common uses include protecting a vulnerable adult's income, keeping a business asset intact while supporting a family member, and managing an inheritance for someone who is not ready to receive capital outright.

The right can be for life, which is where the name life tenant comes from, or for a fixed period, or until a stated event such as remarriage.

Senior Couple Reviewing Trusts and Income Protection

How Income Tax Works

This is where the arrangement is genuinely different from a discretionary trust, and where most confusion sits.

For 2026/27, trustees of an interest in possession trust generally pay tax at basic rates on income as it arises, meaning 20% on other income such as rental income and savings interest, and 10.75% on dividends following the increase that took effect on 6 April 2026.

There is no 45% trust rate here. That rate applies to discretionary and accumulation trusts instead, and the £1,000 standard rate band that once softened it for those trusts was abolished from 6 April 2024.

The £500 De Minimis, and Who it Actually Helps

A separate £500 de minimis does apply, and it applies to interest in possession trusts as well as discretionary ones. Where a trust's total income for the tax year is £500 or less, the trustees have no income tax liability on it and no trust return is needed for that income.

Where the settlor has created more than one trust, the £500 is divided between them down to a floor of £100. Interest in possession trusts, settlor-interested trusts, vulnerable beneficiary trusts and heritage maintenance trusts are left out of that count. If total income exceeds £500, the whole of it is taxable, not merely the excess.

One catch is worth knowing. The de minimis removes the trustees' liability, not the life tenant's. Unlike a low-income estate, trust income remains taxable on the beneficiary even where the trustees paid nothing, so the life tenant still reports it on their own return, simply without a tax credit to set against it.

Passing The Income On

The trustees pass the net income to the life tenant with a statement on form R185 showing the tax already paid. The life tenant treats that income as their own and, where they need to complete a Self Assessment return, reports the income and claims credit for the 20% or 10.75% already suffered.

The consequences run in both directions. A higher-rate taxpayer generally owes more, paying the difference between the tax already credited and their own applicable rate. A basic-rate taxpayer will usually owe nothing further on income already taxed at the basic rate, subject to their overall tax position. A non-taxpayer, or someone whose income and allowances leave them with no income tax liability, can reclaim the tax the trustees paid.

That reclaim is one of the most frequently missed repayments in UK tax. Where a life tenant is an elderly widow with a modest pension and trust income, the trustees may have paid tax she was ultimately not liable to bear. Our guides to Self Assessment and claiming a tax refund cover the process.

Because the income keeps its character, the life tenant's own allowances can apply to it. Savings interest can be sheltered by the Personal Savings Allowance, and dividend income by the dividend allowance. Where the underlying income is rent, the ordinary property rules determine the profit, so see rental income tax and allowable expenses for rental property income.

One important exception. Where the settlor or their spouse or civil partner can benefit from the trust, the settlements legislation may in certain circumstances treat the income as the settlor's income regardless of who actually receives it. The detailed conditions and statutory exceptions need to be checked before deciding who is taxable.

Mandated Income and Why It Matters

Trustees can mandate income directly to the life tenant, meaning it is paid straight from the source rather than routed through the trust.

Where all income is mandated and the trustees have no other taxable income or gains requiring reporting, they may not need to file a trust return for that income. The life tenant simply reports the income on their own return and pays any tax due.

This is a genuine simplification and it is underused. It does not change who is entitled to the income, only who receives it directly and who deals with the associated tax reporting.

Life tenant reviewing trust income and tax details.

Capital Gains Tax

Capital gains arising from disposals of trust assets generally belong to the trustees, not the life tenant, because the life tenant is entitled to income rather than the capital.

Trustees pay Capital Gains Tax at 24% on chargeable gains for 2026/27, following the change that took effect on 30 October 2024 and removed the old distinction between residential property and other assets for trustees.

The trustee annual exempt amount is £1,500 for 2026/27, half the £3,000 available to individuals, and it is shared between trusts created by the same settlor subject to the relevant rules, with a minimum of £300 each where the statutory sharing rules apply.

Two practical points. A disposal of UK residential property must be reported and paid within 60 days, separately from the annual return. A transfer of assets into trust can also constitute a disposal for Capital Gains Tax purposes, normally by reference to market value, but hold-over relief may be available in qualifying cases, allowing the gain to be deferred rather than taxed immediately. See what is a capital gain and the capital gains allowance for the underlying rules.

There is also a valuable uplift on death. Where the life tenant holds a qualifying actual interest in possession and dies, the trust assets are generally treated as acquired at their market value at that date for Capital Gains Tax purposes, potentially eliminating the accumulated gain up to death.

Inheritance Tax, and the Split That Decides Everything

This is the area where interest in possession trusts diverge most sharply depending on when and how the interest arose. Where an individual became beneficially entitled to an interest in possession on or after 22 March 2006, it will generally fall within the relevant property regime unless it is an immediate post-death interest, a disabled person's interest or a transitional serial interest.

Qualifying interests. These include interests in possession that existed before 22 March 2006, immediate post-death interests created by a will, transitional serial interests, and disabled persons' interests. Here the trust assets are generally treated as part of the life tenant's estate. Nothing is normally charged under the relevant-property ten-year regime during the life tenant's lifetime, and on their death the value is added to their estate and taxed at up to 40% above the available nil-rate band of £325,000. Trusts for bereaved minors are a separate privileged category under Section 71A, while age 18-to-25 trusts are subject to their own special regime, so check which regime applies before assuming the estate treatment.

Non-qualifying interests. Most lifetime interest in possession trusts created on or after 22 March 2006 fall into the relevant property regime instead. That means an entry charge on value above the nil-rate band, a periodic charge of up to 6% every 10 years, and exit charges when capital leaves. The entry charge is 20% where the trustees bear the tax, or an effective 25% where the settlor pays it and the transfer has to be grossed up.

The distinction has real money attached. A widow with a qualifying interest adds the whole trust value to her estate, but the trust is outside the normal relevant-property ten-year charge regime. A non-qualifying trust can instead pay smaller amounts regularly and keep the trust assets outside the life tenant's estate.

Where the interest is qualifying and the assets include the family home, the residence nil-rate band of £175,000 may be available if the statutory conditions are met, including the requirement that a qualifying residence passes to direct descendants. The £2 million taper threshold also applies. For the general position see inheritance tax and inheritance tax when the second parent dies.

Trust deed and calendar depicting trust management.

What Happens When the Life Tenant Dies

The interest ends and the capital passes to the remaindermen, or a new interest arises, depending on the trust deed.

Where the interest was qualifying, the value enters the deceased life tenant's estate for inheritance tax, and the assets generally receive the Capital Gains Tax market-value uplift described above.

Where it was not qualifying, an exit charge may arise instead, calculated under the relevant-property rules by reference to the trust's charging history and the circumstances in which the interest ends.

Trustees should not assume the trust simply dissolves. There is usually a period of administration, and income arising in that window still needs reporting.

Registration and Filing Duties

Many UK express trusts must register with HMRC's Trust Registration Service, but there are important exclusions and the precise registration requirement depends on the type of trust and whether it is taxable.

Registrable non-taxable express trusts generally have 90 days to register from becoming registrable. Taxable trusts created on or after 6 April 2021 generally have 90 days to register from becoming liable to tax. Taxable trusts created before that date are subject to different and earlier deadlines. Changes to registered information must also generally be reported within 90 days. Check the Trust Registration Service rules for the particular trust before assuming registration is or is not required.

Where the trust has taxable income or gains that require a trust return, trustees file form SA900 by 31 October for paper or 31 January online, with tax due by 31 January.

Trusts filing an SA900 are outside Making Tax Digital for Income Tax, so the quarterly update regime applying to sole traders and landlords does not reach trustees.

Trustees carry personal responsibility for getting this right, so keep the deed, valuations, minutes of decisions and a clean income record for each tax year.

Trustee managing HMRC trust registration and tax filing.

What is Changing

Business and agricultural property relief, from 6 April 2026

Business Property Relief and Agricultural Property Relief are now subject to new limits. 100% relief is generally limited to the first £2.5 million of qualifying property within the applicable allowance, with 50% relief above that, which works out at an effective 20% on the excess before taking account of other factors.

The £2.5 million allowance was increased from the original £1 million proposal to £2.5 million on 23 December 2025 and the final rules became law in Finance Act 2026, which received Royal Assent on 18 March 2026.

Trusts get their own version of the allowance, but the rules are not as simple as giving every trust a fresh £2.5 million allowance. A relevant-property settlement that started before 30 October 2024 and contained qualifying agricultural or business property at that date generally has its own £2.5 million trust allowance for relevant chargeable events from the first 10-year anniversary occurring on or after 6 April 2026, subject to the detailed rules.

For relevant-property settlements created or funded under the post-30 October 2024 rules, the allowance is subject to the rules linking settlements made by the same settlor, with the £2.5 million maximum shared between relevant settlements made by that settlor. Any trust holding a family business or farmland therefore needs reviewing before its next chargeable event.

From 6 April 2027, most unused pension funds and pension death benefits will come within inheritance tax. Death-in-service benefits payable from registered pension schemes, and certain dependant's scheme pensions from defined benefit or collective money purchase arrangements, will remain outside inheritance tax. See the end of the pension inheritance tax exemption.

Also from 6 April 2027, the Income Tax rates applying to savings and property income rise by 2 percentage points, taking the basic rate to 22%, the higher rate to 42% and the additional rate to 47%. This affects interest in possession arrangements because savings and property income received through the trust will be subject to the new rates from 2027/28, with consequential changes to the tax credited to beneficiaries. The life tenant then settles their final liability at their own applicable rate.

The nil-rate band remains frozen at £325,000 and the residence nil-rate band at £175,000 until 5 April 2031, with the residence nil-rate band taper beginning at £2 million.

Where Pie Fits

The trust's own return is a specialist job. The life tenant's return is not.

If you receive income from an interest in possession trust, that income belongs on your personal Self Assessment where required, with the credit shown on your R185 applied against your tax liability.

Pie pulls trust income together with pensions, employment, savings and property income so the credit is claimed rather than left with HMRC, which matters most for life tenants who are non-taxpayers or basic-rate taxpayers.

See how it works, find out why Pie suits people with income arriving from several directions and check whether a repayment is sitting there from earlier years.

Trustee discussing HMRC trust registration with family members.

The Short Version

Trustees generally pay basic-rate tax on interest in possession trust income, the life tenant pays their own tax with credit for tax already suffered where appropriate, and capital gains are generally dealt with by the trustees at 24% for 2026/27.

For inheritance tax, everything turns on whether the interest qualifies. Pre 22 March 2006 interests and qualifying will-trust interests such as immediate post-death interests generally sit in the life tenant's estate. Most later lifetime trusts sit in the relevant property regime with entry, periodic and exit charges instead.

If you are a life tenant on a low income, check whether you have been reclaiming tax deducted by the trustees. If you are a trustee, check your registration position, filing obligations and whether mandating income would simplify the administration.

And if the trust owns a family business, farmland or other qualifying assets, check the new 2026 Business Property Relief and Agricultural Property Relief rules before the next chargeable event.

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