Foreign Trust Compliance & Form 3520: Avoiding the Punitive 35% IRS Penalty
Of all the international tax reporting requirements imposed by the IRS, none are as ruthlessly penalized or as complex to navigate as the rules surrounding Foreign Trusts. If you are a US person who creates a foreign trust, transfers money to a foreign trust, receives a distribution from a foreign trust, or even receives a large gift from a foreign person, you are subject to rigorous reporting on Form 3520 and Form 3520-A. The penalty for failing to file? Initially 35% of the gross value of the distribution or the amount transferred — potentially destroying the wealth the trust was designed to protect. Our international tax specialists construct compliance shields for families navigating foreign trust administration.
What Triggers Form 3520 and Form 3520-A
Form 3520 (Annual Return to Report Transactions With Foreign Trusts and Receipt of Certain Foreign Gifts) is required when a US person engages in specific transactions with a foreign trust. The triggering events are absolute: making a transfer to a foreign trust, receiving a distribution (whether cash or the free use of trust property like a home) from a foreign trust, or acting as the executor of the estate of a US decedent that contained a foreign trust. Furthermore, Form 3520 is required if a US person receives gifts or bequests from nonresident aliens exceeding $100,000 in a year, or from foreign corporations exceeding approximately $18,500.
Form 3520-A (Annual Information Return of Foreign Trust With a U.S. Owner) is a separate, complex reporting return required when a foreign trust has a US owner under the grantor trust rules. While technically the obligation to file Form 3520-A belongs to the foreign trustee, the IRS places the ultimate responsibility on the US owner to ensure it gets filed. If the foreign trustee refuses to do American tax reporting, the US owner must file a substitute Form 3520-A themselves. The deadlines do not match up cleanly: Form 3520-A is generally due March 15th, while Form 3520 is due April 15th with the standard income tax return. Our team maintains a strict compliance calendar to prevent timeline lapses.
The Penalties: Automatic, Severe, and Difficult to Abate
The penalty regime for Form 3520 violations is draconian. If a US beneficiary receives a $1 million distribution from a foreign trust and fails to report it timely on Form 3520, the IRS automatically assesses a penalty of 35% of the gross reportable amount — landing a $350,000 penalty immediately. If a US person transfers $2 million into a foreign trust and fails to report, the penalty is $700,000. Failure to report foreign gifts exceeding the limits carries a penalty of 5% per month, up to 25%.
Unlike many other IRS penalties that are generated by an auditor, these penalties are frequently assessed automatically by IRS computers when a late form is processed without a protective reasonable cause statement. Fighting an automated Form 3520 penalty notification can take 12 to 18 months, requiring specialized reasonable cause representation before IRS Appeals. For taxpayers who have discovered prior unfiled Form 3520s, quietly filing them late guarantees an automated penalty notice. Delinquent filers must utilize the IRS Streamlined Filing Compliance Procedures or the Delinquent International Information Return Submission Procedures to defensively submit the forms under penalty protection.
The "Throwback" Tax on Accumulated Foreign Trust Income
When a foreign non-grantor trust accumulates income rather than distributing it in the year it is earned, that income loses its original character (e.g., long-term capital gains at 20%) and becomes Undistributed Net Income (UNI). When the trust eventually distributes that historical UNI to a US beneficiary in a later year, the distribution is subjected to the punitive "throwback rule."
The throwback tax recalculates the tax on the distribution as if the beneficiary had received it in the years the trust actually earned it. It applies the highest ordinary income tax rate to the accumulated amount — stripping away any preferential capital gains or qualified dividend rates — and tacks on a daily compounded interest charge to account for the deferral period. For a large distribution from a trust that has accumulated income for twenty years, the combined throwback tax and interest charge can consume nearly 100% of the distribution. We require the foreign trustee to provide a Foreign Grantor Trust Beneficiary Statement (or Non-Grantor Statement) annually, and we model distribution timing to avoid throwback taxation entirely whenever possible.
Related Resources
International Tax Services
Form 3520, 3520-A preparation and beneficiary income modeling.
Voluntary Disclosure (VDP)
What to do if your foreign trust was used to evade taxation.
IRS Streamlined Filing
Filing delinquent Form 3520s without triggering the 35% penalty.
Foreign Income & FBAR
Navigating Form 8938 asset disclosures alongside Form 3520.