Foreign non-grantor trust: what US beneficiaries must know in 2026
A foreign non-grantor trust is a trust that meets the IRS foreign trust definition under IRC sections 7701(a)(30) and (31) and has no US person treated as the owner of any portion under the grantor trust rules of IRC sections 671–679.
US beneficiaries are taxed only when they receive distributions of the trust’s foreign-source income, not when the trust earns that income. (The trust itself can still owe US tax currently on any US-source or effectively connected income it earns, regardless of distributions.)
This creates a deferral opportunity for foreign-source income – but also triggers the throwback tax rules when accumulated income is eventually distributed.
The following three characteristics define a foreign non-grantor trust:
- Foreign status: The trust fails the court test, the control test, or both – meaning it does not qualify as a domestic trust under US tax law
- No deemed US owner: No US person is treated as the owner of any trust portion under the grantor trust rules. If a US person is the deemed owner, the trust is a foreign grantor trust instead.
- Separate taxable entity: The trust is not subject to US income tax on its foreign-source income, but distributions to US beneficiaries carry tax consequences that can be severe – including the throwback tax and an interest charge on deferred income
See our TFX guide to foreign trusts for a broader overview of how the IRS classifies domestic and foreign trusts.
How the IRS defines a foreign trust
A trust is foreign for US tax purposes unless it passes both the court test and the control test – failing either one makes it foreign.
The IRS applies a two-part test under IRC section 7701(a)(30)(E): the court test in clause (i) and the control test in clause (ii). Section 7701(a)(31)(B) then defines a foreign trust as any trust that doesn’t meet this test:
- The court test: A US court must be able to exercise primary supervision over the administration of the trust. “Primary supervision” means the authority to determine substantially all issues regarding the trust’s administration. If the trust is governed by foreign law and administered abroad, this test typically fails.
- The control test: One or more US persons must have the authority to control all substantial decisions of the trust. Substantial decisions include the timing and amount of distributions, selection of beneficiaries, investment decisions, and whether to terminate the trust.
If either test fails, the trust is classified as foreign. The default under the IRC is foreign – a trust is domestic only if it satisfies both tests simultaneously.
Foreign grantor trust vs foreign non-grantor trust: key differences
The single most important distinction is who bears the US income tax liability – the grantor or the trust’s beneficiaries.
The difference between a foreign grantor trust and a foreign non-grantor trust determines how the IRS taxes trust income, which forms must be filed, and who is responsible for reporting.
| Feature | Foreign grantor trust | Foreign non-grantor trust |
|---|---|---|
| Who pays US income tax | The US grantor – taxed on all trust income annually, whether or not distributed | US beneficiaries – taxed only when they receive distributions |
| Applicable IRC sections | Sections 671–679 – grantor is deemed owner | Sections 641–668 – trust is a separate taxable entity |
| Form 3520-A filing | Required – filed by the trust or substitute filed by US owner | Not required – no US deemed owner exists |
| US beneficiary reporting | Beneficiaries report distributions on Form 3520, but income tax falls on the grantor | Beneficiaries report distributions on Form 3520 and pay income tax, including possible throwback tax |
| Tax on accumulated income | Not applicable – grantor pays tax currently | Throwback tax under IRC sections 665–668 applies to accumulated income distributions |
See our TFX guide to foreign grantor trusts for the grantor trust side of this analysis.
IRC section 679: when a US person is deemed the grantor
IRC section 679 is the key provision that determines whether a foreign trust is treated as a grantor trust or a non-grantor trust when a US person has made transfers to it.
The following three conditions trigger deemed owner status under IRC section 679:
- A US person directly or indirectly transfers property to a foreign trust
- The trust has, or is presumed to have, a US beneficiary
- No exception applies – the transfer was not at death or in exchange for fair market value consideration
If all three conditions are met, the US transferor is taxed on all trust income attributable to the transferred property – the trust is a foreign grantor trust, not a non-grantor trust, regardless of what the trust instrument says.
How a foreign non-grantor trust is taxed
A foreign non-grantor trust is treated as a separate taxable entity: the trust itself is not subject to US income tax on foreign-source income, but US beneficiaries are taxed when they receive distributions.
The tax treatment depends on the character of the distribution:
- Current-year distributable net income: Distributions of current-year DNI are taxed as ordinary income to the US beneficiary in the year received. The character of the income – interest, dividends, capital gains – generally carries through from the trust to the beneficiary.
- Accumulated income: Distributions that exceed current-year DNI are treated as accumulation distributions and subject to the throwback tax rules under IRC sections 665–668. This includes an interest charge on the deferred tax.
- Corpus: Distributions of original trust principal are generally not subject to US income tax, but the beneficiary must document that the distribution is from corpus and not accumulated income.
The throwback tax rules explained for US beneficiaries
The throwback rules eliminate the tax deferral advantage of accumulating income inside a foreign non-grantor trust.
The following four steps summarize the throwback tax calculation under IRC sections 665–668:
- Identify the accumulation distribution. This is the amount by which the current-year distribution exceeds the trust’s current-year DNI.
- Allocate it to prior trust tax years. The accumulation distribution is spread across the trust’s prior tax years using the averaging method prescribed in IRC section 667.
- Compute the hypothetical tax. Calculate the additional tax the beneficiary would have paid in each prior year if the accumulated income had been distributed when earned.
- Add an interest charge. An interest charge applies to the deferred tax for each year of accumulation, compounded at the underpayment rate.
The resulting tax and interest charge are reported on Form 4970, which is attached as a worksheet to Form 3520. The throwback tax applies only to foreign trusts and to domestic trusts created before March 1, 1984.
Corpus distributions: Are they taxable?
Distributions of trust corpus – the original principal contributed to the trust – are generally not subject to US income tax, because sections 661 and 662 limit a beneficiary’s income inclusion to the trust’s distributable net income under section 643(a).
The burden of proof falls on the US beneficiary. Without proper documentation – specifically a foreign non-grantor trust beneficiary statement – the IRS may treat the entire distribution as an accumulation distribution subject to throwback tax.
This makes record-keeping critical. A US beneficiary who cannot demonstrate that a distribution came from corpus rather than accumulated income will be taxed on the full amount at ordinary income rates, plus the interest charge.
What is a foreign non-grantor trust beneficiary statement?
Without a valid beneficiary statement, a US recipient must treat the entire distribution as an accumulation distribution and apply the throwback tax rules.
A foreign non-grantor trust beneficiary statement is a document prepared by the foreign trust or its trustee that gives a US beneficiary the information needed to correctly report a distribution on Form 3520.
Per the IRS instructions for Form 3520, the statement must include:
- Identifying information about the foreign trust and its trustee
- The first and last day of the trust’s tax year covered by the statement
- A description of the property (including cash) distributed and its fair market value
- An explanation of the appropriate US tax treatment of the distribution – or enough detail for you to work it out yourself
- Whether any grantor of the trust is a partnership or foreign corporation, with an explanation if so
- Whether the trust has appointed a US agent – if so, that agent’s name, address, and taxpayer identification number
- A statement permitting the IRS or you to inspect and copy the trust’s books and records (not required if the trust has appointed a US agent)
The format is not prescribed by the IRS, but the content must be sufficient to complete Form 3520, Part III. Miss any of these and the statement doesn’t count – you’re back to treating the whole distribution as accumulated income subject to throwback tax.
Foreign non-grantor trust beneficiary statement example
Based on a common TFX client scenario: A US beneficiary receives a $150,000 distribution from a Cayman Islands discretionary trust in 2025.
The following simplified beneficiary statement illustrates the required content:
| Field | Value |
|---|---|
| Trust name and jurisdiction | ABC Family Trust, Cayman Islands |
| Tax year | 2025 |
| Total distribution amount | $150,000 |
| Amount from current-year DNI | $40,000 – taxed as ordinary income |
| Amount from prior-year accumulated income | $60,000 – subject to throwback tax under IRC sections 665–668 |
| Amount from corpus | $50,000 – generally not subject to US income tax |
| Trustee certification | Signed by the trustee or authorized representative |
The $40,000 of current-year DNI is reported as ordinary income on the beneficiary’s Form 1040. The $60,000 of accumulated income triggers the throwback tax calculation on Form 4970. The $50,000 of corpus is reported on Form 3520 but is generally not taxable.
Without this statement, the IRS would treat the full $150,000 as an accumulation distribution – resulting in throwback tax and interest charges on the entire amount.
Form 3520 reporting requirements for US beneficiaries
Form 3520 is an information return – failure to file triggers a penalty based on the distribution amount, not a tax deficiency.
A US person who receives a distribution from a foreign non-grantor trust must meet the following obligations:
- File Form 3520 by the due date of your US income tax return, including extensions. For expats abroad without a separate extension request, this is June 15 of the year following the distribution; if you file Form 4868, the deadline moves to October 15
- Report the distribution amount in Part III of Form 3520, including a breakdown of DNI, accumulated income, and corpus if a beneficiary statement is available.
- Attach the beneficiary statement if the trustee provided one. This allows the IRS to verify the character of the distribution.
- Compute throwback tax on accumulation distributions using Form 4970, attached as a worksheet. If no beneficiary statement is available, the default method treats the entire distribution as accumulated income.
See our TFX guide to Form 3520 for the full filing walkthrough, including Part I transfer reporting and Part IV foreign gift reporting.
Form 3520-A: Does a foreign non-grantor trust have to file?
Form 3520-A is the annual information return required for foreign trusts with a US owner. A foreign non-grantor trust generally does not file Form 3520-A because no US person is treated as the owner.
If a US person is treated as the owner of any trust portion – for example, under IRC section 679 – the trust becomes a grantor trust, and Form 3520-A is required.
Relief from Form 3520 and 3520-A for certain tax-favored foreign trusts
The IRS has provided relief from Form 3520 and 3520-A filing requirements for certain tax-favored foreign trusts under Rev. Proc. 2020-17.
This relief applies to two categories of arrangements: tax-favored foreign retirement trusts, and tax-favored foreign non-retirement savings trusts established to provide medical, disability, or educational benefits.
To qualify as a retirement trust, the plan generally must cap contributions at $50,000 or less a year, or $1,000,000 or less over its lifetime.
Many employer-sponsored pension schemes meet this test. A self-managed structure, such as an Australian self-managed super fund (SMSF), often doesn’t qualify – the member’s own control over contributions and investment decisions makes it difficult to satisfy Rev. Proc. 2020-17’s conditions, and voluntary member contributions can also exceed the $50,000 annual or $1,000,000 lifetime caps.
Confirm your specific fund’s structure and contribution history before assuming the exemption applies.
The relief does not apply to discretionary foreign non-grantor trusts used for wealth transfer or asset protection. If the trust doesn’t qualify, the standard Form 3520 filing obligation applies.
See our TFX article on relief from Forms 3520-A and 3520 for the specific conditions.
US person beneficiary: Tax treatment of distributions step by step
The character of a foreign trust distribution – DNI, accumulated income, or corpus – determines whether you owe ordinary income tax, throwback tax, or nothing at all.
The following five steps walk through the tax treatment of a distribution from a foreign non-grantor trust to a US beneficiary:
- Determine if the distribution is from current-year DNI. If yes, it is taxed as ordinary income in the year received. The income retains its character – interest, dividends, or capital gains – as it passes through from the trust.
- Determine if any portion is from accumulated income. Amounts exceeding current-year DNI are treated as accumulation distributions under IRC sections 665–668. These trigger the throwback tax plus an interest charge.
- Determine if any portion is from corpus. Distributions of original trust principal are generally not taxable, because sections 661 and 662 limit a beneficiary’s income inclusion to the trust’s distributable net income under section 643(a), but you must document the corpus character with a beneficiary statement or other trust records.
- Report the distribution on Form 3520, Part III. Attach the foreign non-grantor trust beneficiary statement if available. If no statement exists, apply the default method.
- Include any throwback tax on Form 4970. Attach Form 4970 as a worksheet to Form 3520. The throwback tax and interest charge are added to your regular income tax liability for the year.
Establishing a foreign non-grantor trust: Common structures and jurisdictions
The following jurisdictions are commonly used for foreign non-grantor trusts, each for distinct structural or legal reasons:
- Cayman Islands – no local income tax on trust income; well-established trust legislation; widely used for discretionary family trusts
- Cook Islands – strong asset protection statutes; short statute of limitations for creditor claims
- New Zealand – favorable tax treatment for non-resident trusts with foreign-source income; used for family wealth structures
- Singapore – growing trust industry with modern legislation; strategic location for Asia-Pacific families
- Liechtenstein – continental European trust jurisdiction with established private banking infrastructure
The choice of jurisdiction directly affects whether the trust passes or fails the court test and control test. US persons who transfer assets to trusts in these jurisdictions must carefully structure the arrangement to avoid inadvertent grantor trust status under IRC section 679.
If the trust has even one US beneficiary and a US person made a transfer, section 679 may override the non-grantor classification regardless of the trust’s jurisdiction or governing law.
Foreign non-grantor trust and US estate tax considerations
A foreign non-grantor trust can be an effective estate planning tool for US expats, but only if the settlor relinquishes all retained interests that would trigger IRC section 2036 or 2038 inclusion.
Assets held in a properly structured foreign nongrantor trust are generally not included in the US gross estate of a US beneficiary – the beneficiary holds only a contingent interest, not ownership.
Assets may be included in the estate of a US settlor if the settlor retains certain powers or interests – such as the right to revoke the trust, control distributions, or receive income. IRC sections 2036 and 2038 are the two most common inclusion triggers.
The federal estate tax exclusion was made permanent at the higher level under the One Big Beautiful Bill Act, signed July 4, 2025. For expatriate estate planning purposes, the basic exclusion amount for tax year 2026 – $15 million per individual – is no longer scheduled to sunset. This provides long-term planning certainty for US persons with foreign trust structures.
See our TFX guide to estate taxes for expatriates for the full estate tax analysis.
Penalties for non-compliance: What US beneficiaries risk
The IRS treats foreign trust reporting failures as information return violations – penalties are based on the transaction amount, not the tax owed, and can be substantial even when no US tax is due.
| Violation | Penalty |
|---|---|
| Failure to file Form 3520 on time | Greater of $10,000 or 35% of the gross value of the distribution or transfer amount. Additional $10,000 for each 30-day period of continued non-filing after IRS notice. The initial penalty and all continuation penalties together cannot exceed the gross reportable amount. |
| Failure to report a foreign trust distribution | Same penalty structure as failure to file – 35% of the gross value of the unreported distribution |
| Failure to attach a required beneficiary statement | The IRS treats the distribution as if no statement was provided, triggering default throwback tax treatment on the entire amount |
| Failure to file Form 3520-A when required | Greater of $10,000 or 5% of the gross value of trust assets treated as owned by the US person |
Since late 2024, the IRS has reviewed reasonable cause statements attached to late-filed Forms 3520 and 3520-A before assessing a penalty, rather than assessing first and considering your explanation afterward. This is a significant improvement, but it does not eliminate penalties – it means the IRS will consider your explanation before issuing a notice.
Revocable vs irrevocable foreign trusts: Impact on non-grantor status
A revocable foreign trust – where the settlor retains the power to revoke – is almost always treated as a grantor trust under IRC section 676, regardless of whether it is foreign or domestic. The settlor’s retained power means the trust income is taxable to the settlor.
An irrevocable foreign trust can qualify as a non-grantor trust if no US person is treated as the owner under IRC sections 671–679.
Foreign trustee requirements and the control test
A trust fails the control test – and is therefore foreign – if even one substantial decision is controlled by a non-US person. US persons must control every substantial decision for the trust to pass the control test and remain domestic.
The following are examples of “substantial decisions” per IRS guidance under Treas. Reg. 301.7701-7(d):
- Timing and amount of distributions to beneficiaries
- Selection of beneficiaries
- Investment decisions for trust assets
- Whether to terminate the trust
- Appointment or removal of trustees
Having even one non-US trustee with authority over any of these decisions can cause the trust to fail the control test – making it foreign rather than domestic. This reclassification changes the entire tax analysis.
Foreign non-grantor trust vs foreign disregarded entity: Key distinctions
A discretionary or asset-protection foreign trust – the type covered in this guide – can never be treated as a disregarded entity: the two classifications are mutually exclusive for an ordinary trust under US tax law.
A foreign disregarded entity is a business entity with a single owner that is ignored for US tax purposes and reported on Form 8858. A foreign non-grantor trust, by contrast, is a separate taxable entity with its own reporting regime under Form 3520.
Misclassifying a foreign trust as a disregarded entity is a common and costly error. The two entities have different reporting forms, different filing deadlines, and different penalty regimes.
See our TFX guide to foreign disregarded entities and Form 8858 for the entity classification rules.
Frequently asked questions
It is a trust that qualifies as foreign under the IRS court test and control test, and has no US person treated as the owner under the grantor trust rules of IRC sections 671–679. The trust itself is not subject to US income tax on foreign-source income, but US beneficiaries are taxed on distributions.
In a foreign grantor trust, the US grantor pays income tax on all trust income annually. In a foreign non-grantor trust, the US beneficiaries pay tax only when they receive distributions – and accumulated income distributions trigger throwback tax with an interest charge.
It is a document from the trustee showing how much of your distribution is from current-year income, accumulated income, or corpus. Without it, the IRS treats the entire distribution as accumulated income subject to throwback tax.
Current-year DNI distributions are taxed as ordinary income. Accumulated income distributions are subject to throwback tax under IRC sections 665–668 plus an interest charge. Corpus distributions are generally not taxable if properly documented.
The penalty is the greater of $10,000 or 35% of the gross value of the distribution. Additional penalties of $10,000 per 30-day period apply after IRS notice. See our TFX article on Form 3520 penalty abatement for relief options.
Assets in a properly structured foreign non-grantor trust are generally not included in a US beneficiary’s gross estate. They may be included in the settlor’s estate if the settlor retained powers under IRC sections 2036 or 2038.
The throwback tax applies to accumulated income distributed from a foreign non-grantor trust. It recalculates your tax as if the income had been distributed in the years it was earned, plus an interest charge compounded at the underpayment rate. It is reported on Form 4970, attached to Form 3520.
A grantor trust is a trust where the grantor – the person who created and funded it – retains enough control or beneficial interest that the IRS treats the grantor as the owner for income tax purposes. The grantor trust rules are in IRC sections 671–679. The grantor reports all trust income on their own US return.
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