Trusts Across Borders: How the US, UK, and UAE Tax Trusts Differently—And Why Your Family Structure Matters

If you're a business owner, founder, or expat with assets or family members spread across the United States, United Kingdom, and United Arab Emirates, you already know that tax law doesn't follow a single rulebook. Trusts—one of the most powerful tools for wealth preservation and family planning—are taxed in radically different ways depending on which side of which border you stand. A trust structure that works beautifully in Dubai may create a nightmare in New York; a UK-resident beneficiary of a US trust faces rules that don't exist in the UAE. This article unpicks those differences and shows you why jurisdiction matters more than you might think.

The Core Problem: Three Different Trust Philosophies

Before diving into specifics, it helps to understand that the US, UK, and UAE don't just disagree on trust taxation—they start from different philosophical ground. The US treats trusts as separate taxable entities (if they're grantor trusts, the rules change again). The UK has intricate settlements legislation and distinguishes between bare trusts, discretionary trusts, and others, each with unique beneficiary tax burdens. The UAE, by contrast, has historically had no personal income tax and minimal trust-specific legislation, though this is evolving.

This isn't a case of "minor differences." A single trust can face:

Double taxation if it has US and UK beneficiaries
Reporting obligations in two or three jurisdictions that don't align
Penalties for non-filing that dwarf the actual tax owed
Loss of control over assets through unexpected trust classification

How the United States Taxes Trusts

The US Internal Revenue Service (IRS) treats trusts as separate taxpayers unless specific elections are made. Here's the framework:

Grantor vs. Non-Grantor Trusts

If you've transferred assets into a trust you created, the IRS may classify it as a grantor trust—meaning you're taxed on the trust's income as if you still owned the assets. This happens under IRC §§671-679 and is often the intended outcome for founders wanting to maintain control while shifting future growth to heirs.

If you're not the grantor, or your status expires, the trust itself becomes the taxpayer. Non-grantor trusts are taxed at rates that currently reach the top federal rate at far lower income thresholds than individuals do—meaning they can become very expensive from an income-tax perspective.

The Foreign Beneficiary Problem

If a trust has beneficiaries outside the US, things get thornier:

US citizens (wherever they live) must report worldwide income, including distributions from any trust
Non-US beneficiaries who receive distributions may trigger Foreign Account Tax Compliance Act (FATCA) reporting
The trust itself may be classified as a foreign trust if the trustee is non-US or if control is exercised outside the US

A foreign trust distributing to a US beneficiary must file Form 3520-A annually, and beneficiaries must file Form 3520, with steep penalties for late or missing filings.

United Kingdom Trust Taxation

The UK approach is fundamentally different and requires understanding the type of trust, not just whether it's foreign.

Bare Trusts

A bare trust (where a beneficiary has an absolute right to the trust assets and income) is transparent for tax purposes: income is taxed on the beneficiary, not the trust. This is often the simplest structure for estates passing to adult children.

Discretionary Trusts

In a discretionary trust, the trustee has power to decide who receives income and capital. The UK taxes this differently:

The trust itself pays income tax on undistributed income at a special rate (the "trust rate"—currently a relevant fraction of the standard rate, though you should check the current threshold at HMRC)
Beneficiaries who receive distributions get a tax credit
Inheritance Tax (IHT) is charged at 20% on transfers into the trust (a chargeable lifetime transfer) and again every 10 years on trust assets

For expat founders, the impact is acute: a UK discretionary trust holding UK property or with UK beneficiaries can trigger substantial IHT even if the settlor and trustee are abroad.

Settlement Legislation

The UK's anti-avoidance rules around settlements (broadly, arrangements where someone transfers assets but retains benefit) mean that even a non-UK trustee may be caught if the settlor is UK-resident or UK-domiciled. See HMRC guidance on settlements.

UAE Trust and Wealth Structures

The UAE's trust regime is less developed than those in the US and UK, and this is both an opportunity and a risk for cross-border families.

No Personal Income Tax

The UAE has no federal personal income tax, which means trust income is not taxed at the federal level within the UAE. This has made Dubai especially attractive for wealth concentration.

Emerging Legislation

However, the UAE is evolving. It introduced a Federal Decree by Law No. 47 of 2022 on Taxation establishing a corporate income tax regime (introduced in 2023 for certain entities). While this initially did not extend to personal trusts, the landscape is changing. Non-residents should monitor updates from the UAE Ministry of Finance and the Federal Tax Authority.

Trust Recognition Issues

The UAE is a civil-law jurisdiction and does not have a common-law trust concept baked into its core legal system. A trust valid in the US or UK may not be recognized under UAE law for property ownership or succession purposes. This creates a risk: you might hold assets in a trust that the UAE courts or authorities don't recognize, leading to unexpected probate battles or succession law applying instead.

Comparing the Three: Key Differences in a Table

|--------|---------------|----------------|-----|

| Tax on Trust Income | Grantor or non-grantor; may be taxed to grantor or trust | Trust pays special "trust rate"; beneficiaries receive distributions | No personal income tax; corporate tax emerging for certain entities |

| IHT/Inheritance Tax | No federal inheritance tax on trusts per se (only estate tax on grantor's death) | 20% on entry; 10-yearly charge; 40% on death | No inheritance tax; succession law applies |

| Foreign Beneficiaries | Must file FATCA; may trigger US tax on worldwide distributions | Assessed separately; non-resident beneficiaries still taxed on UK-source income | Not clearly defined; civil law applies |

| Reportable Accounts | Form 3520-A (trust) and 3520 (beneficiary); FBAR if >$10k foreign accounts | Annual trust tax return (T) and beneficiary statements; IHT accounts | Minimal reporting; no FATCA equivalent |

The Cross-Border Family: Real Compliance Risks

Suppose you're a UK-domiciled founder with US citizenship, now based in Dubai. You set up a discretionary trust in London to hold shares in your US company:

1. The US will view you as the grantor (or not, depending on your control level), taxing the trust's income or not accordingly; meanwhile, Form 3520-A is due annually.

2. The UK will charge IHT on entry and possibly on distributions to your non-UK-resident children.

3. The UAE may not recognize the trust as a legal entity, creating probate risk if you die while tax resident there.

4. Your US children must file Form 3520 if they receive distributions and report worldwide income.

5. A UK child resident in the UAE must reconcile UK tax residence with UAE residence and UAE FATCA reporting.

Miss one filing, and penalties can exceed the actual tax. Get the structure wrong at the outset, and you may trigger unexpected tax liabilities or lose the intended benefits.

Best Practices for Cross-Border Trust Planning

Given these complexities, here are the core principles:

1. Map Your Residence and Citizenship

Confirm your tax residence in each jurisdiction (usually based on physical presence, domicile, or center of vital interests)
Remember that the US taxes citizens on worldwide income, regardless of residence
The UK distinguishes between residence and domicile; domicile often trumps residence for estate planning

2. Choose the Jurisdiction for the Trust Carefully

A US grantor trust is efficient if the grantor is US-domiciled and wants to retain control
A UK trust may be preferable if assets are UK-based and beneficiaries are UK-resident, but plan for IHT
A UAE trust may create enforceability gaps if the trust is not recognized under UAE law; consider a hybrid structure (e.g., a trust holding shares in a UAE company)

3. Plan Distributions to Minimize Double Taxation

Discretionary trusts in the UK create a tax burden on the trustee; distributing to non-UK-resident beneficiaries can help, but requires careful withholding
US trusts should consider distributing to non-US beneficiaries to avoid that beneficiary reporting US-source income
UAE beneficiaries should verify their own tax residence to confirm they won't become liable for tax elsewhere

4. File All Required Returns—Even if Tax Is Low

Form 3520-A (US trusts with foreign beneficiaries) is annual
UK trust returns are annual
FATCA filings (FBAR, Form 8938) are required if accounts exceed thresholds
Missing even one filing can lead to penalties of $10,000+ per form, per year

5. Review Beneficiary Residency Annually

If a beneficiary's tax residence changes (e.g., a child moves from the UK to the UAE), the trust's reporting and tax liability may change. An annual review with a cross-border advisor is essential.

The Role of a Professional

Trust taxation across the US, UK, and UAE is not a spreadsheet exercise. It requires understanding the tax codes in three jurisdictions, coordinating filings, and anticipating changes in residence or beneficiary circumstances. Every trust we review at Next Tax Source is assessed by a licensed professional—an IRS Enrolled Agent and ACCA-qualified accountant—to ensure that the structure is sound and all filings are on time.

If you're setting up a trust or inheriting from one, or if you're managing a trust that spans multiple jurisdictions, professional guidance is not optional. The cost of compliance is a fraction of the cost of an audit, a reassessment, or restructuring a trust that was set up incorrectly.

Closing Thoughts

Trusts are one of the most powerful tools for family wealth preservation and business succession, but only if they're designed and maintained correctly across borders. The US, UK, and UAE each have their own rules, and there's very little overlap. A structure that saves tax in one jurisdiction might create unexpected liability in another.

The good news: with proper planning and annual compliance, trusts can achieve their intended purpose—passing wealth efficiently and preserving family harmony—even in a cross-border world.

Frequently asked questions

Will a trust I set up in the US be recognized and enforced in the UK or UAE?+

A US trust will generally be recognized in the UK if it complies with US law, though UK tax law (inheritance tax, settlements legislation) will apply to UK assets and UK-resident beneficiaries. In the UAE, recognition is less certain because trusts are not a native concept under civil law; consider establishing a UAE company to hold assets as a more reliable structure.

Do I have to pay tax on a trust distribution if I'm not a US citizen?+

If you're a non-US citizen and non-resident, you typically won't owe US federal income tax on distributions from a non-US trust. However, if the trust is a US trust or distributes US-source income (e.g., from US real estate or a US business), tax may apply. You should always file Form 3520 if required and confirm your residency status with a cross-border tax professional.

What is the biggest risk of moving assets into a trust if I live across multiple countries?+

The biggest risk is unintended double taxation or penalties from missing filings in one or more jurisdictions. For example, a discretionary trust in the UK is taxed on undistributed income, and distributions to US-citizen beneficiaries may also be taxed in the US. If you don't file the required forms (Form 3520-A, trust tax returns, etc.) in each country, penalties can easily exceed the actual tax owed.

Is it better to use a discretionary trust or a bare trust for cross-border families?+

It depends on your goals and jurisdictions. A bare trust is more tax-efficient in the UK but offers less flexibility. A discretionary trust gives the trustee control but triggers higher UK tax rates and inheritance tax. For cross-border families, the choice often requires modeling in all relevant jurisdictions; there's no one-size-fits-all answer.

If I'm a US citizen living in the UAE, which trust jurisdiction should I choose?+

This is complex and depends on where your assets are, where your beneficiaries are, and your long-term plans. As a US citizen, you'll owe US tax on worldwide trust income regardless of where the trust is based. A US-based grantor trust may be most efficient because you're taxed on the income (and avoid non-grantor trust rates) while building wealth for heirs. Seek professional guidance to model all options.

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