Varying or decanting a UK trust when a beneficiary is American

Varying or decanting a UK trust puts two questions in play, and they are decided by two revenue authorities applying two unrelated tests to the same piece of paper. HMRC asks whether the change is a variation of the existing settlement or a resettlement; if it is a resettlement, there is a deemed disposal at market value. The IRS asks something different — whether the changes are substantial enough that this is now a new trust, and whether a US person who signed the deed has just made a transfer to a foreign trust. The two answers do not have to agree, and when they disagree, the cost almost always lands on the American beneficiary.

This is not a theoretical mismatch. UK trustees reorganise settlements constantly, usually for reasons unconnected with tax: a beneficiary has become vulnerable, a class is too wide, a sub-fund needs its own trustees. The deed is drafted, the UK consequences are modelled carefully, and nobody asks what it looks like from the other side of the Atlantic.

Four ways a UK trust gets changed

Before the tax, the mechanics. A UK settlement is usually altered by one of the following:

• An express power in the deed — a power of appointment, advancement, or amendment that the trustees exercise within its own terms.
• Unanimous beneficiary agreement — the rule in Saunders v Vautier, where every beneficiary is adult, of sound mind and between them absolutely entitled.
• A court application under the Variation of Trusts Act 1958, where the court consents on behalf of minors and unborn beneficiaries, and only if the arrangement benefits each person it consents for.
• Appointment onto new trusts — assets appointed out of the existing settlement and onto fresh terms. This is what American advisers call decanting, and it is the move most likely to cause trouble.

A post-death deed of variation is a different animal. It does not change a trust; it changes who takes under a will or intestacy, under its own statutory machinery. It gets its own section below, because it carries the sharpest trap in this area.

The UK question: variation, or resettlement?

HMRC's starting position is generous. Its Capital Gains Manual states that in general you should assume a single deed or will gives rise to a single settlement, and that separate trusts applying to parts of the settled property do not by themselves create a second one. The authority behind all of it is the House of Lords decision in Roome v Edwards.

From that case comes a list of pointers — separate property, separate trustees, separate trusts, separate beneficiaries — which Lord Wilberforce described as indicia rather than conclusive. HMRC's guidance at CG33280 says the question must be approached in a practical and common-sense manner, and adds two warnings that matter more than the list itself:

• Judge it as at the date of the settlement, or the testator's death — not as things stand today. HMRC says expressly that it will resist trustees who start from the present position. If there are two settlements now and there was only one originally, something happened in between.
• The identity of the trustees is irrelevant. CG37800 puts it plainly, and records that the older view — that property could move to a separate settlement without a charge — was shown to be wrong by Roome. Keeping the same trustees saves nothing.

Where a new settlement is created, the new trustees are treated as absolutely entitled as against the old ones. That is a disposal under section 71(1) of the Taxation of Chargeable Gains Act 1992, at market value, whether or not a penny changes hands. On top of it, property leaving a relevant property settlement carries an exit charge in fortieths of the settlement's rate, one per complete quarter since the last ten-year anniversary, and the new settlement starts its own ten-year cycle — a charge that can reach 6% of the relevant property. We cover that cycle, and why it gives an American beneficiary no US credit, in the ten-year anniversary charge and the US beneficiary.

The IRS asks a different question, and asks it separately

Nothing in the paragraphs above is of the slightest interest to the IRS. US practitioner analysis of decanting runs on its own track: where the changes to a trust are substantial, the IRS may treat the result as a new trust for income tax purposes — and where a foreign trust is involved, the exercise may itself be a reportable event under section 6048.

What matters most to a US beneficiary is the trust's accumulated income. A settlement that has accumulated rather than distributed will, in US terms, have built up undistributed net income. The throwback rules treat an eventual accumulation distribution as belonging to the years the income arose, and add an interest charge for the deferral. Decanting washes none of this away: undistributed net income carries over to the recipient trust, and moving a trust — including moving it onshore — does not cleanse the taint.

So you can have the worst of both: a deed HMRC treats as a resettlement, triggering a market-value deemed disposal and a UK exit charge, while the IRS treats the same arrangement as the same old trust with every year of accumulated income still attached. Or the reverse — a change HMRC is happy to call a variation, which the IRS reads as a new trust funded by whoever held the interest beforehand.

The deed of variation: a fiction that stops at the border — and before it

Here is the trap worth the price of admission. Section 142 of the Inheritance Tax Act 1984 lets the people who benefit under a will or intestacy redirect what they inherit, by written instrument, within two years of the death. Where it applies, the Act takes effect as if the variation had been made by the deceased. The beneficiary who gives up an interest is treated as never having had it, and the redirected gift is treated as the deceased's.

Two conditions must hold. The instrument must contain the statutory statement that the subsection is intended to apply, made by all the relevant persons — a deed omitting it can be perfectly valid at general law and useless for tax. And the variation must not be made for consideration in money or money's worth.

Now read the words again: the Act applies as if. That retroactive fiction is a creature of the Inheritance Tax Act, and the Inheritance Tax Act is as far as it goes. It does not even travel across UK taxes intact. Capital gains has its own, separate election, and it is separate in substance as well as in form: section 68C of the Taxation of Chargeable Gains Act 1992 provides that where a variation causes property to become settled, it is the legatee who was entitled — the living beneficiary who signed — who is treated as having made the settlement and provided the property for it. Not the deceased. Technical commentary from UK life and pensions providers states the same split applies for income tax. The deceased stays settlor only in the narrower case where property that was already settled is moved into another settlement.

If the deceased-as-settlor fiction is already confined to inheritance tax before it leaves the United Kingdom, it should be no surprise that the United States declines to pick it up. The IRS has no section 142. There is no provision of the Internal Revenue Code under which a living person's redirection of an inheritance is retroactively treated as a transfer by someone who has died.

Why it is not a qualified disclaimer either

The reflexive answer is that the US equivalent is a qualified disclaimer under section 2518. It is the closest analogue, and it usually does not fit. The statutory conditions are narrow:

• The written refusal must be received no later than 9 months after the later of the transfer creating the interest or the day the person reaches 21. The UK window runs for two years from death. A deed executed in month fourteen is comfortably inside one window and long outside the other.
• The person must not have accepted the interest or any of its benefits. An estate that has been distributing income for a year has already created a problem.
• Most decisively, the interest must pass without any direction on the part of the person disclaiming. A deed of variation exists precisely so the original beneficiary can say where the property goes — often into a new trust of their own design. That fails on the instrument's purpose, not a drafting slip, and careful wording cannot repair it.

Where the disclaimer rules do not reach, the ordinary US analysis applies to what actually happened: a person who owned an interest gave it to someone else. If the destination is a UK trust, the obvious reading is a transfer by a US person to a foreign trust — which is the reportable event the IRS describes in its foreign trust reporting guidance, and which can, where the trust has a US beneficiary, make that person the owner of the trust for US income tax purposes — bringing annual trust-level reporting alongside their own return. A family that set out to simplify an estate can hand one of its members an American filing obligation for a trust they neither control nor can see inside.

None of this is a conclusion about any particular deed. It is the analysis that must be run before signature, by someone qualified to run it, because almost none of it can be undone afterwards.

What to ask the trustees for before anyone signs

If you are the American in a UK family about to restructure a trust, these are the requests that change outcomes:

• Trust accounts prepared on a US basis, separating income from capital in US terms, for every year the trust has existed. UK trust accounts do not answer the US question.
• A stated position on accumulated income as at the proposed date, so that nobody discovers the throwback exposure after the appointment has been made.
• A commitment to provide a Foreign Nongrantor Trust Beneficiary Statement for any year in which anything is appointed or distributed to you. Without it, the default characterisation rules apply and they are rarely kind.
• Sight of the draft deed, early, for US review — not the executed version for information.
• Clarity on who is treated as settlor, for which tax, in which country. As above, there can be three different answers on one instrument.

Sequencing matters too. UK guidance treats the deed as the event and the tax as a consequence. For a US beneficiary, what is appointed, to whom, and in which US tax year relative to the trust's accumulated income can change the answer materially — and all of it is still adjustable while the deed is in draft.

The companion pieces to this one deal with the related fact patterns: a UK will trust with a US beneficiary, an appointment out of a UK discretionary trust, pension death benefits paid into a UK trust, and when a settlor-interested UK trust becomes a US grantor trust.

Where we fit

Next Tax Source works both sides at once: we read the draft deed with the UK resettlement question and the US new-trust question open on the same desk, model the throwback position before anything is appointed, and say plainly when the right answer is that the deed should not be signed as drafted. Every filing and written position is reviewed and signed off by a licensed professional — an IRS Enrolled Agent on the US side, an ACCA-qualified accountant on the UK side — and cross-border trust positions go to human review as a matter of course, never by template.

More on how we handle these structures on our US-UK private client tax page, what engagements cost on our pricing page, or book a consultation if a deed is already in draft. If it is, bring it before execution — that one piece of timing is worth more than anything else here.