A UK Will Trust Is Not a Grantor Trust: What a US Beneficiary Inherits

A trust created by a UK will is a foreign non-grantor trust from the moment it comes into existence. It does not "become" a grantor trust on death, and it never was one: grantor-trust treatment requires someone currently taxable in the United States to be treated as the owner, and a deceased UK testator is not that person. For a US beneficiary this matters enormously, because the non-grantor regime is the harder of the two — the trust is a separate taxpayer, and what it accumulates before paying you out can cost you more than the distribution itself.

This is worth stating plainly because the commentary around it is muddled. A great deal of writing describes grantor-trust status "ending" at the settlor's death. That is accurate, but it describes a different animal: a trust the settlor created and held powers over while alive, which loses that status when they die. A will trust has no such history. It begins on the death.

Key takeaways

• A UK will trust is a foreign non-grantor trust from day one. There is no status change at death because there was never a US-taxable grantor for it to change from.
• As a US beneficiary, you are generally taxed on what the trust distributes to you — and distributions above the trust's current-year distributable net income are traced back to earlier accumulated income, with an interest charge on top.
• The single most valuable thing you can ask the UK trustees for is a Foreign Nongrantor Trust Beneficiary Statement. Without one, the default treatment works against you.
• The UK treatment turns on what the will actually created, not on the fact of death. A discretionary will trust is relevant property; a will trust giving someone a life interest from death is an immediate post-death interest and sits outside the relevant property regime.
• Sitting outside that regime is not automatically a saving. An immediate post-death interest makes the life tenant beneficially entitled to the whole capital of the fund for inheritance tax, so the fund is taxed as part of their estate on their death.
• That status is continuing, not banked at the funeral. When it ends, the trust falls into the relevant property regime on a ten-year clock that has been running since the settlement commenced.
• The US side and the UK side are decided by entirely different tests. Neither answer tells you the other.

Why "becomes a grantor trust on death" does not fit a will trust

The conclusion follows from three provisions read in order. We quote them because this is one of those points where paraphrase is how the error spreads.

First, section 671 is the only way in. It applies "Where it is specified in this subpart that the grantor or another person" "shall be treated as the owner of any portion of a trust", and then requires the trust's income, deductions and credits to be "included in computing the taxable income and credits of the grantor or the other person". Its closing sentence shuts every alternative route: no items of a trust are included in anyone's income "solely on the grounds of his dominion and control over the trust" "under section 61 ... or any other provision of this title," "except as specified in this subpart." Grantor-trust treatment therefore exists only where the rules name a person who is currently taxable as owner.

Second, section 672(f) closes the door on a non-US grantor. The subsection is headed, in terms, "Subpart not to result in foreign ownership". It opens "Notwithstanding any other provision of this subpart, this subpart shall apply only to the extent" that applying it results in an amount being currently taken into account in computing the income of a US citizen or resident, or a domestic corporation. A deceased UK testator is none of those things.

Third, both of the exceptions are expressly tied to a living grantor. Section 672(f)(2)(A) lets a trust escape that restriction in only two cases: where there is a power "to revest absolutely in the grantor title to the trust property", or where "the only amounts distributable from such portion (whether income or corpus) during the lifetime of the grantor" are to the grantor or the grantor's spouse.

A trust that arises on the testator's death can satisfy neither. The testator holds no power to revest anything — they are dead, and the property has passed under the will. And there is no remaining lifetime during which distributions could be confined to them or a spouse. Both gates are shut not by interpretation but by the plain terms of the exceptions.

So the classification is settled at the outset, and it is settled against the beneficiary. Where a lifetime trust is concerned, the familiar analysis does apply — we work through the living-settlor case separately in when a settlor-interested UK trust is a US grantor trust, and the position of a US person who is treated as owner in Form 3520-A and the US owner of a foreign trust.

What the non-grantor regime actually means for you

With no US owner, the trust stands on its own feet for US purposes, and the tax follows the money out to you rather than being picked up by anyone along the way.

In broad outline:

• Current-year income distributed to you is taxed to you. A distribution carrying out the trust's distributable net income for the year is taxed in your hands, broadly retaining the character it had in the trust.
• Income the trust accumulates is not taxed to you — yet. Nothing happens on your US return while a UK trust quietly retains income. This is what makes the regime feel benign for years at a time.
• Then it arrives all at once. A distribution that exceeds the current year's distributable net income is treated as an accumulation distribution and thrown back against the income the trust accumulated in earlier years. It is taxed by reference to those earlier years rather than this one, and an interest charge is added for the period the tax went unpaid.
• The interest charge is usually the real cost. Because it compounds over the whole accumulation period, a long-dormant trust making a large distribution can produce a charge out of all proportion to the distribution's apparent size. In older trusts the combined result can approach the distribution itself.

We have deliberately not quoted the penalty figures or interest rates that circulate on this subject. They vary, several widely repeated numbers are not tied to the provision the page attributes them to, and the firm does not publish a figure it has not verified against a current primary source. Ask for the arithmetic on your own facts, not a headline rate.

Ask the trustees for a beneficiary statement

This is the practical point that almost no page makes, and it is the one that saves the most money.

Where a US beneficiary receives a distribution and cannot show how it is composed, the default treatment is unkind: the distribution can be treated as an accumulation distribution in its entirety, with the throwback consequences that follow. The way out is documentary. A UK trustee who provides a Foreign Nongrantor Trust Beneficiary Statement — setting out the trust's income, its accumulations and how the distribution is made up — allows the actual composition to be used instead of the default.

UK trustees frequently do not know this exists. They have no US filing obligation of their own and no reason to have met the form. Asking early, in writing, and before a distribution is made, is far easier than reconstructing decades of trust accounts afterwards. If the trust has been running for a long time and the records are thin, that is a problem to start on now rather than at the point of distribution.

Your own US reporting runs on Form 3520, which is filed with your income tax return and is due at the same time, extensions included. It is an information return, not a tax return — but the consequences of not filing it are structural and serious, and they are assessed per form and per year rather than by reference to any tax you owe. We cover the beneficiary's reporting in more detail in foreign trusts and Form 3520 for US persons in the UK.

The UK side turns on what the will created

Here the analysis is completely different, and the fact of death decides nothing by itself. What matters is the interest the will brought into being.

Under section 58 of the Inheritance Tax Act 1984, relevant property is settled property in which no qualifying interest in possession subsists — excluding, among other things, "property held for charitable purposes only", property within sections 71, 71A, 71D, 73, 74 or 86, registered and qualifying non-UK pension schemes, and "excluded property".

So the question is whether somebody holds a qualifying interest in possession. It is worth being precise about the order in which that question gets answered, because the two branches of a will fail or pass at different stages — and the stage matters.

A discretionary will trust never reaches section 49A

"Interest in possession" is not defined by statute in England and Wales or Northern Ireland. HMRC says so in its own manual, and points to the House of Lords decision in Pearson v IRC for the test: a person has an interest in possession when they have "a present right of present enjoyment", or an immediate right to the income or enjoyment of the property.

A discretionary will trust — trustees deciding who gets what and when — gives nobody a present right of present enjoyment. So it has no interest in possession at all, as a matter of general law, and the section 49A conditions are never reached. It is relevant property, and it enters the regime of periodic and exit charges.

That distinction is not pedantry. A discretionary will trust is not a failed immediate post-death interest — it was never in the running. Writing that frames it as failing the section 49A conditions arrives at the right answer by the wrong route, and the wrong route is what breaks when the facts shift slightly.

A life interest from death: four conditions, not two

Where the will does give someone a present right of present enjoyment from the moment of death — commonly a surviving spouse — there is an interest in possession, and section 49A then asks whether it is an immediate post-death interest. The section defines and charges nothing. It sets four conditions, and the phrase it uses is "only if":

• "Condition 1 is that the settlement was effected by will or under the law relating to intestacy."
• "Condition 2 is that L became beneficially entitled to the interest in possession on the death of the testator or intestate."
• "Condition 3 is that— (a) section 71A below does not apply to the property in which the interest subsists, and (b) the interest is not a disabled person’s interest."
• "Condition 4 is that Condition 3 has been satisfied at all times since L became beneficially entitled to the interest in possession."

Conditions 1 and 2 are the two that get quoted, and for a death under a UK will they are simply our facts. Conditions 3 and 4 are the ones that get missed — and Condition 4 is the one that should change how you hold the whole idea in your head, because it makes the test continuing. Condition 3 is not satisfied once at death and then banked; it has to hold "at all times since". An immediate post-death interest is a status to be maintained, not a box ticked at the funeral. It can be lost after it arises.

Section 59(1) makes the connection. A qualifying interest in possession means an interest in possession to which an individual is beneficially entitled and which, if the individual became entitled on or after 22 March 2006, is an immediate post-death interest, a disabled person’s interest or a transitional serial interest. Those three are the only routes. On a death under a will today the immediate post-death interest is the only one realistically available, because the transitional serial interest routes all require a settlement that commenced before 22 March 2006.

That date is the Finance Act 2006 trust reform, and the test it applies is the date the interest came into existence — not the date the settlement was made. An interest in possession that came into existence before 22 March 2006 was, and still is, deemed ownership under section 49(1), with no immediate post-death interest analysis required at all.

Where the relevant property regime does apply, two charges matter. The ten-year anniversary charge is calculated, not flat: the statute sets it at three tenths of the effective rate, and HMRC's own guidance states the result cannot exceed 6% of the relevant property's value. The exit charge, when property leaves the settlement, is a fraction of that rate expressed in fortieths — one fortieth for each complete successive quarter, and "quarter" is defined in the Act as a period of 3 months. We look at the periodic charge from the beneficiary's point of view in the ten-year anniversary charge, seen from the US beneficiary's side.

One further UK point now sits underneath all of this. Since the move from domicile to residence as the connecting factor for inheritance tax, non-UK settled property is excluded property only while the settlor is not a long-term UK resident, tested continuously rather than fixed at the date of settlement. Long-term UK residence means UK resident for at least 10 of the previous 20 tax years. For a will trust settled by someone who lived their life in the UK, that test is usually met, and the non-UK assets are inside the net.

What an immediate post-death interest actually does to the life tenant

This is the half of the story that gets left out, and it is the half that costs money.

Escaping the relevant property regime is not a tax saving. It is a transfer of the charge — off the trustees and onto the life tenant. Section 49(1) provides that a person beneficially entitled to an interest in possession in settled property "shall be treated for the purposes of this Act as beneficially entitled to the property in which the interest subsists". Not the income — the property. The whole capital value of the fund.

Section 49(1A) is the gate on that. For an interest taken on or after 22 March 2006, the deeming applies "only if, and for so long as" the interest is an immediate post-death interest, a disabled person’s interest or a transitional serial interest. Read that next to Condition 4 and the design is consistent: the deeming switches off the moment the interest stops qualifying.

From there the chain is short. Section 5(1) makes a person’s estate the aggregate of all the property to which they are beneficially entitled. Section 4(1) then charges tax on death "as if, immediately before his death, he had made a transfer of value" equal to the value of that estate. So the trust fund is taxed as part of the life tenant’s estate, on the life tenant’s death.

Set that against what the trust escaped. The periodic charge an immediate post-death interest avoids cannot exceed 6% of the value of the relevant property at a ten-year anniversary, and it is a computed rate, not a flat one. For a substantial fund with a long-lived life tenant, having the entire capital value fall into one estate on one death can be the worse inheritance tax outcome, not the better one.

Which way it falls is arithmetic, not structure: it turns on the size of the fund, how long the interest is expected to run, and what else sits in the life tenant’s estate. That is a calculation worth doing before anyone describes an immediate post-death interest as the tax-efficient option. Our calculators are a starting point, and a consultation is where the arithmetic gets done on your actual numbers.

When the immediate post-death interest comes to an end

There are two ways out. They carry different charges, fall on different people, and the same thing happens to the trust afterwards either way.

On the life tenant’s death. The deemed ownership in section 49(1) feeds the estate under section 5(1), and section 4(1) charges the fund as part of that estate. Nothing further is needed.

On a lifetime termination. Section 52(1) charges tax where the interest "comes to an end" during the life tenant’s life, "subject to section 53 below", as if the life tenant had made a transfer of value equal to the value of the property in which the interest subsisted. Two things follow from that drafting. The charge falls on the life tenant as a deemed transferor — a different taxable person from the relevant property charges, which fall on the trustees. And it is expressly subject to exceptions in section 53, which we have deliberately not set out: the qualifier is in the statute, and stating the charge flatly without it would overstate what the section does.

Selling or giving away the interest is caught too, by a route that is widely misread. Section 51(1) says that where the life tenant disposes of the interest, the disposal "is not a transfer of value" but "shall be treated for the purposes of this Chapter as the coming to an end of his interest; and tax shall be charged accordingly under section 52". The words "is not a transfer of value" do not mean no tax arises — they route the charge through section 52 instead. It is probably the single most misread sentence in this part of the Act. A termination of part of an interest is charged on a corresponding part of the value.

And then the trust changes regime. Once the interest has ended and no new qualifying interest in possession subsists, the settled property has no qualifying interest in possession — so it becomes relevant property under section 58(1), and the periodic and exit charges apply from that point.

Here is the trap, and it catches people who have done everything else right. The ten-year anniversary is defined in section 61(1) as "the tenth anniversary of the date on which the settlement commenced", with subsequent anniversaries at ten-yearly intervals. It runs from when the settlement commenced — not from when the property became relevant property. A will trust whose immediate post-death interest ends in year nine can meet a periodic charge in year ten, on a clock that was running the whole time nobody was watching it.

One caution on language while we are here. The ten-year anniversary is not the ten years in the long-term UK residence test, which counts UK residence for 10 of the previous 20 tax years. Several unrelated ten-year periods run through UK and US trust taxation, and they each do different work. "The ten-year rule", unqualified, is never a safe phrase.

Two sides, one trust, and no shared logic

It is worth being blunt about how little the two systems talk to each other.

The US asks who, if anyone, is currently taxable as owner, and answers "nobody" for a will trust. The UK asks whether a qualifying interest in possession subsists, and answers according to the drafting of the will. A trust can therefore be a foreign non-grantor trust for US purposes and outside the relevant property regime for UK purposes at the same time, or inside both, and neither conclusion is evidence for the other.

The consequence for a US beneficiary is that UK tax paid by the trustees is not automatically a credit on your return, and a UK charge arising in a given year does not necessarily line up with the US year in which your distribution is taxed. The mirror-image situation — a US trust with a UK-resident beneficiary — has the same disjointedness running the other way, and we set that out in a US trust with a UK-resident beneficiary.

What to do next

If you have just learned you are a beneficiary of a trust under a UK relative's will, the useful order is:

• Get the will and the trust deed, and establish what interest was actually created. Everything on the UK side follows from that one question.
• Ask the trustees, in writing, for trust accounts and a beneficiary statement before any distribution is made. This is the request that is easy now and hard later.
• Do not wait for a distribution to start the US analysis. Your reporting position and your exposure to the throwback rules are shaped by years that have already happened.
• Establish whether anyone has been filing. If the trust has had US beneficiaries for some time and nothing has ever been filed, that is a disclosure question in its own right, and it has its own route.

This is cross-border work where the two analyses have to be run together by people who do both. Our US-UK private client team handles exactly this fact pattern, and everything we prepare is reviewed and signed by a licensed professional — in our case an IRS Enrolled Agent who is also ACCA-qualified, which is the combination this subject needs. You can see what engagements of this kind cost on our pricing page, or book a consultation and bring the will.

Sources

• 26 U.S.C. §671, Trust income, deductions, and credits attributable to grantors — statutory text (GPO)
• 26 U.S.C. §672, Definitions and rules — statutory text, including §672(f) (GPO)
• Inheritance Tax Act 1984, section 58 (relevant property) — legislation.gov.uk
• Inheritance Tax Act 1984, section 49A (immediate post-death interest) — legislation.gov.uk
• Inheritance Tax Act 1984, section 49 (treatment of interests in possession) and section 59 (qualifying interest in possession) — legislation.gov.uk
• Inheritance Tax Act 1984, section 52 (charge on termination of an interest in possession), section 51 (disposal of an interest) and section 61 (ten-year anniversary) — legislation.gov.uk
• IHTM16061 and IHTM16062, Inheritance Tax Manual — HMRC, on immediate post-death interests and qualifying interests in possession
• About Form 3520, Annual Return To Report Transactions With Foreign Trusts — IRS
• Trusts and Inheritance Tax — GOV.UK

This article explains general principles and is not advice on your own facts. Rates, thresholds and deadlines change; figures here are checked against official sources on the date shown. Every return and filing we prepare is reviewed and signed by a licensed professional.