United Kingdom trusts and U.S. reporting requirements

U.S. points that arise with a UK trust

A trust separates the person contributing property from the trustee managing it and the beneficiary entitled to benefit. Trustees hold legal ownership and administer the property under the trust terms, including paying tax due. Different trust types can receive different UK tax treatment, so the word trust alone does not establish the result.^[1]

From 6 April 2025, long-term UK residence replaced domicile and deemed domicile for the relevant inheritance tax analysis. Earlier domicile explanations are superseded for that framework, although historical facts remain relevant to transitional provisions and certain deceased settlors.^[2][3][4]

A U.S. citizen scenario

Consider a U.S. citizen who is a beneficiary of a trust governed by UK law. The trust deed and a trustee statement explaining the payment can help establish the distribution's U.S. tax treatment. U.S. tax treatment depends in part on whether the trust is a grantor or nongrantor trust, and the IRS describes different beneficiary statements for those classifications.^[5]

Citizenship, immigration permission and tax residence are separate questions; a residence history is not inferred from a passport or visa. For UK inheritance tax, the relevant long-term residence test uses UK tax residence, while the U.S. foreign trust rules expressly include U.S. citizens within their scope.^[2][5]

Local treatment: UK income tax and capital gains

GOV.UK states that trustees of accumulation or discretionary trusts pay income tax at 39.35% on dividend-type income and 45% on other income. Most trusts have an income exemption normally set at £500, but exceeding the applicable amount brings the full income into charge. That amount can be divided where the settlor has multiple accumulation or discretionary trusts.^[6]

For interest in possession trusts, the stated trustee rates are 10.75% for dividend-type income and 20% for other income. Bare trust beneficiaries are responsible for income tax themselves. For settlor-interested trusts, the settlor is responsible for income tax even though trustees initially pay it. The taxpayer and the income therefore have to be identified separately.^[6]

Capital gains tax may arise when property enters or leaves a trust. GOV.UK states a trustee rate of 24% after applicable adjustments and an annual exempt amount of £1,500 for 6 April 2026 to 5 April 2027, with different treatment for certain disabled beneficiaries. Local relief does not establish a U.S. exemption; the same transaction needs a separate U.S. calculation.^[7][5]

U.S. treatment: classification and taxable income

UK governing law does not by itself settle U.S. trust classification. A trust is domestic for U.S. purposes only when a U.S. court exercises primary supervision over administration and U.S. persons control all substantial decisions. A trust failing either requirement is foreign; grantor or nongrantor treatment is a separate inquiry.^[5]

A U.S. person treated as owner under the grantor trust rules generally reports the trust income. A U.S. beneficiary receiving a foreign nongrantor trust distribution generally reports the beneficiary's share of distributable net income. Certain transfers of appreciated property to a foreign nongrantor trust can also require recognition of gain.^[5]

For the illustrative beneficiary, a UK tax statement is useful documentation, but it may not answer the U.S. classification question. The IRS identifies specific foreign trust beneficiary statements addressing distribution taxability. What those statements support determines how the payment belongs on the U.S. return.^[5]

Local treatment: inheritance tax and residence history

From 6 April 2025, a person generally meets the long-term UK residence test through UK tax residence in at least 10 of the previous 20 tax years. Long-term status can continue for up to 10 tax years after departure, depending on residence history and applicable transitional rules. Leaving the country therefore does not necessarily end the inheritance tax connection immediately.^[2]

Foreign settled property generally has excluded property status only while the settlor is not long-term UK resident, subject to deceased-settlor rules and transitional provisions. For a settlor dying on or after 6 April 2025, residence status at death determines the continuing treatment described by HMRC. Qualifying interest in possession settlements can also require consideration of the beneficiary's long-term residence.^[3]

Inheritance tax can arise on transfers into trust and on relevant property leaving a trust, as well as at each 10 year anniversary. These are separate charging events, so an estate calculation alone does not answer the trust's obligations. Trustees need notice of changes in the settlor's residence position to assess the effect on trust property.^[8][2]

Transitional property requires a separate record

HMRC describes transitional provisions for specified excluded property comprised in a settlement immediately before 30 October 2024. The property must also satisfy the relevant conditions at the chargeable event. This treatment concerns particular charges and does not remove all relevant property charges; additions made on or after that date do not qualify for the same transitional treatment.^[4]

For qualifying property, HMRC describes a £5 million cap on relevant property charges per 10 year cycle, with a proportionate initial period. Returns remain required even when the cap prevents further tax in that period. Where the transitional provisions apply to chargeable events on or after 6 April 2025, HMRC directs completion of schedule D31b alongside the relevant IHT100 series form.^[4][9]

U.S. treatment: reporting alongside UK compliance

Form 3520 can apply when a U.S. person creates or funds a foreign trust, is treated as its owner, or receives a distribution. Reporting can also extend to loans and uncompensated use of trust property. Benefits received beyond cash payments therefore bear on the filing position.^[5]

A U.S. owner must ensure that the foreign trust timely files a complete and accurate Form 3520-A and furnishes the required annual statements. Form 8938 and FBAR involve separate reporting questions. A UK filing or institutional information exchange does not complete those personal U.S. obligations.^[5]

The IRS warns that incomplete or late foreign trust information reporting can produce civil penalties and extend the assessment period for related tax. Supporting trustee documentation ties each transaction to the filing, and filing decisions follow the actual trust relationship and the applicable reporting rules.^[5]

International instruments at a glance

Treaties, TIEAs, FATCA and CRS are separate instruments.

Scope limits and practical coordination

The U.S.-UK income tax treaty covers the UK itself. It does not automatically extend to the Crown Dependencies or Overseas Territories, so each territory's own instruments govern. The existence of a treaty does not show how a particular trust payment is treated; that depends on the article, the payment and the treaty's limitation on benefits.

UK express trusts, unless excluded, and some non-UK trusts that hold UK land or have UK trustees, must register on HMRC's Trust Registration Service.

Scope and status

United Kingdom inheritance tax. From 6 April 2025 UK inheritance tax on non-UK assets uses a long-term UK residence test (10 of the previous 20 tax years); trust treatment and transitional protection depend on the settlement.

Treaty notice. Treaty outcomes depend on the text, the parties, territorial coverage and eligibility. A TIEA, FATCA agreement or CRS relationship is not an income tax treaty. UK treaties do not extend to territories automatically.

More on United Kingdom

Questions and answers

Related pages

• UK trust taxation compared with U.S. treatment: UK trust taxation for a U.S. citizen, covering trustee income tax, capital gains, inheritance tax, U.S. classification and cross-border reporting questions.
• UK inheritance tax and long-term residence rules for trusts: A guide for a U.S. citizen to UK trust inheritance tax, long-term residence, departure rules and transitional treatment, with separate U.S. tax questions.
• Form 3520: foreign trusts and foreign gifts: Form 3520 reports U.S. persons' dealings with foreign trusts and certain foreign gifts: reporting categories, definitions, attachments and filing timing.
• How the IRS classifies trusts for U.S. tax purposes: U.S. trust classification for tax purposes: ordinary and investment trusts, U.S. person status, and the environmental remediation trust rule in the regulations.