Foreign Non-Grantor Trust Taxation and US Reporting

If you’re a US beneficiary of a foreign non-grantor trust, US reporting and taxation work like this: the trust itself pays US tax only on US-source income, but every distribution you receive is taxable to you, and any distribution above the trust’s current-year income triggers the “throwback rules,” which layer an interest charge on top of ordinary-income tax and can consume most of what you receive. You also have to disclose the distribution on Form 3520, and depending on your interest in the trust’s accounts, you may owe an FBAR and Form 8938 as well. Miss those filings and the penalties start at $10,000 or 35 percent of the distribution, whichever is greater.

What Makes a Trust “Foreign Non-Grantor”

A trust is foreign for US tax purposes unless it passes both the court test (a US court can exercise primary supervision over its administration) and the control test (US persons hold authority over all substantial decisions). Fail either, and it’s foreign.¹

“Non-grantor” means the trust is a separate taxpayer, not treated as owned by the person who funded it. IRC §679 makes this uncommon when a US person set up the trust: if a US person transfers property to a foreign trust that has or could have a US beneficiary, the trust is automatically treated as a grantor trust as to that US transferor.² In practice, a true foreign non-grantor trust usually arises when a non-US person sets one up for US family members, or when a foreign grantor trust converts to non-grantor status after the foreign grantor dies.

One quick boundary: because a foreign non-grantor trust has no US owner, Form 3520-A (the annual information return for foreign trusts with a US owner) does not apply to your situation. It’s a form for the grantor-trust cases.³

How the Trust Itself Is Taxed

The IRS taxes a foreign non-grantor trust much like a nonresident alien individual. It owes US income tax on US-source income (including income effectively connected with a US trade or business and fixed or determinable income such as US dividends, interest, rents, and royalties), and nothing on foreign-source income or gains from selling non-US assets.⁴

The consequence is straightforward: income can accumulate inside the trust year after year with no US tax, and the reckoning comes when it’s paid out to you.

How Your Distributions Are Taxed

Current-Year Income

When the trust distributes income it earned in the current year, you include that amount in your taxable income. The trust’s distributable net income (DNI) determines how much of a payment is taxable income versus tax-free principal. That much resembles domestic trust rules.

The break from the domestic rules is capital gains. Under IRC §643(a)(6)(C), the provision that excludes capital gains from a domestic trust’s DNI does not apply to foreign trusts.⁵ Capital gains flow through to you as ordinary income, not at preferential long-term capital gains rates. For a trust holding appreciated investments, that alone can add ten percentage points or more to the effective tax rate on your distribution.

Accumulation Distributions and the Throwback Rules

Whenever a distribution exceeds the trust’s current-year DNI, the excess is an “accumulation distribution”: income the trust earned in prior years but did not pay out. IRC §667 subjects it to the throwback rules.⁶

The mechanics: the accumulated income is thrown back to the years the trust originally earned it. Your additional tax is then calculated by a partial-tax averaging method that looks at your five preceding tax years, drops the highest-income and lowest-income years, averages the tax increase across the remaining three, and multiplies that figure by the number of years over which the trust accumulated the income.

On top of that tax, an interest charge runs from the year the trust earned the income through the year it’s actually distributed to you. Where income has sat inside the trust for a decade or longer, the combined tax and interest can consume the majority of the distribution. The total is capped at the gross amount of the accumulation distribution, but hitting that ceiling is not unusual with long accumulation periods.⁷

The Beneficiary Statement Matters

To separate current-year income from accumulated income on your Form 3520, you need the trust to provide a Foreign Non-Grantor Trust Beneficiary Statement. If the trustee doesn’t give you one, you must treat the entire distribution as an accumulation distribution and apply the throwback rules to all of it, regardless of how much was actually current-year income.⁸ Ask for the statement before you file.

Loans and Use of Trust Property Count as Distributions

Borrowing from a foreign trust is not a way around distribution treatment. Under IRC §643(i), a loan of cash or marketable securities from a foreign trust to a US grantor, beneficiary, or related US person is treated as a distribution and taxed under the rules described above.⁵ Using trust property without paying fair market value triggers the same treatment.

Repaying the loan does not undo the tax. Once the deemed distribution is recognized, later repayment, cancellation, or discharge is disregarded. Borrow $500,000 and pay it back the next month, and you have still received a $500,000 taxable distribution in the IRS’s view.

What You Have to File and When

Form 3520

Any US person who receives a distribution from a foreign trust must file Form 3520, “Annual Return to Report Transactions With Foreign Trusts and Receipt of Certain Foreign Gifts.” Beneficiaries report the distribution on Part III and calculate the throwback tax and interest charge there.⁹

Form 3520 is due on the 15th day of the fourth month after the end of your tax year. For calendar-year individuals, that’s April 15. If you get an extension on your income tax return, Form 3520 is automatically extended to October 15. Taxpayers living and working abroad have until the 15th day of the sixth month.⁹

FBAR (FinCEN Form 114)

If the trust holds foreign financial accounts, you may owe an FBAR. The threshold is $10,000 in aggregate across all foreign accounts in which you have a financial interest at any time during the calendar year.¹⁰ For a trust’s accounts, you have a “financial interest” if you have a present beneficial interest in more than 50 percent of the trust’s assets or receive more than 50 percent of the trust’s current income.¹¹ Beneficiaries below both thresholds generally don’t need to file for the trust’s accounts.

Form 8938 (FATCA)

Form 8938, “Statement of Specified Foreign Financial Assets,” is filed with your income tax return and is separate from the FBAR. Thresholds depend on filing status and where you live. Unmarried taxpayers in the US file when specified foreign financial assets exceed $50,000 on the last day of the year or $75,000 at any time during the year. Joint filers in the US: $100,000 and $150,000. Single filers abroad: $200,000 and $300,000. Joint filers abroad: $400,000 and $600,000.¹² Filing one does not satisfy the other; they go to different places and carry different penalties.

Penalties for Missed Filings

IRC §6677 sets the penalty framework, and the numbers are steep:

Failure to report a distribution on Form 3520: the greater of $10,000 or 35 percent of the gross distribution.
Failure to report a transfer to a foreign trust: the greater of $10,000 or 35 percent of the gross value transferred.
Failure to file Form 3520-A (grantor-trust cases): the greater of $10,000 or 5 percent of the trust assets treated as owned by the US person.
Continuation penalty: if the failure continues more than 90 days after the IRS mails notice, an additional $10,000 applies for each 30-day period (or fraction) of continued non-compliance.

Aggregate penalties for any single failure are capped at the gross reportable amount, so they can’t exceed the value of the distribution or assets. But reaching a cap equal to 100 percent of the distribution is not much comfort.⁷ These penalties are assessed automatically during processing, so a beneficiary who inherits a trust and knows nothing about the filings will still get the notice.

Fixing Late or Missed Filings

Reasonable Cause

The main defense is showing reasonable cause for the failure. The IRS looks at whether you acted responsibly before and after the failure, requested extensions when possible, tried to prevent the failure, and corrected it as fast as you could once you found out. First-time filers, taxpayers with otherwise clean compliance histories, and those who relied on incorrect professional advice tend to have the strongest cases.¹³ You can request abatement by phone using the number on your notice or by mailing Form 843, “Claim for Refund and Request for Abatement,” with documentation. Given what’s at stake, put it in writing.

Delinquent International Information Return Submission Procedures

If you have unfiled prior-year returns, aren’t under examination, and haven’t been contacted by the IRS about the delinquency, you can file late Forms 3520 through the delinquent international information return submission procedures, attaching a reasonable cause statement to each return.¹⁴ Submitting through these procedures does not guarantee penalty-free treatment; the IRS may still assess penalties during processing and expect you to respond to follow-up correspondence with your explanation.

Streamlined Filing Compliance Procedures

If your failures were non-willful, the streamlined filing compliance procedures are another option. They’re open to individual taxpayers (US residents and those abroad) who certify their failure to report income, pay tax, and file required information returns resulted from negligence, inadvertence, mistake, or a good-faith misunderstanding of the law. You cannot use them if you’re under civil examination or criminal investigation for any tax year.¹⁵

The Practical Takeaway on Timing

The throwback rules make accumulation expensive by design. Every additional year income sits inside a foreign non-grantor trust adds to the interest charge and pushes the eventual distribution deeper into ordinary-income territory. A trust that distributes its DNI each year avoids the accumulation problem entirely. A trust that holds income for a decade hands its beneficiaries a tax bill that can swallow the benefit of deferral. If you’re a beneficiary with any influence over distribution timing, or if you’re advising the trustee, that’s the lever that matters most.

1
Office of the Law Revision Counsel. 26 USC 7701 – Definitions
2
Office of the Law Revision Counsel. 26 USC 679 – Foreign Trusts Having One or More United States Beneficiaries
3
Internal Revenue Service. Instructions for Form 3520-A (Rev. December 2025)
4
Internal Revenue Service. Taxation of Beneficiary of a Foreign Non-Grantor Trust
5
Office of the Law Revision Counsel. 26 USC 643 – Definitions Applicable to Subparts A, B, C, and D
6
Office of the Law Revision Counsel. 26 USC 667 – Treatment of Amounts Deemed Distributed by Trust in Preceding Years
7
Office of the Law Revision Counsel. 26 USC 6677 – Failure to File Information With Respect to Certain Foreign Trusts
8
Office of the Law Revision Counsel. 26 USC 6048 – Information With Respect to Certain Foreign Trusts
9
Internal Revenue Service. Instructions for Form 3520 (12/2025)
10
FinCEN.gov. Report Foreign Bank and Financial Accounts
11
eCFR. 31 CFR 1010.350 – Reports of Foreign Financial Accounts
12
Internal Revenue Service. Do I Need to File Form 8938, Statement of Specified Foreign Financial Assets
13
Internal Revenue Service. Penalty Relief for Reasonable Cause
14
Internal Revenue Service. Delinquent International Information Return Submission Procedures
15
Internal Revenue Service. Streamlined Filing Compliance Procedures