IRC 6039F: Form 3520 Filing, Thresholds, and Penalties

If you are a U.S. person who received a large gift or inheritance from someone outside the United States, the reporting requirements under IRC Section 6039F require you to file IRS Form 3520 when the gift exceeds certain thresholds, even though the gift itself is not taxable income.{¹ The threshold is $100,000 for gifts from a foreign individual or estate, and an inflation-adjusted $20,116 for 2025 for gifts from foreign corporations or partnerships.{² Missing the filing can cost you 5% of the gift’s value per month, up to 25%, and the IRS can reclassify the entire gift as taxable income.

Who Has to File

The reporting duty falls on the U.S. recipient, not the foreign donor. “U.S. person” covers citizens, resident aliens, domestic corporations and partnerships, and domestic estates and trusts. The foreign source can be a nonresident alien individual, a foreign estate, a foreign corporation, or a foreign partnership.

A foreign gift is any amount you receive from a non-U.S. person that you treat as a gift or bequest.{¹ Two things are excluded: qualified educational or medical payments made directly to the institution on your behalf, and distributions from a foreign trust that get reported separately on Form 3520 under Section 6048.

Reporting Thresholds by Donor Type

Section 6039F applies different thresholds depending on whether the donor is a person or a business entity. Getting the classification right decides whether you have to file at all.

Gifts From Foreign Individuals and Estates

You must file if the total you receive from a nonresident alien individual or foreign estate exceeds $100,000 during the tax year.{² Once you cross that mark, you have to separately identify each individual gift greater than $5,000.{³ If no single gift exceeded $5,000, you still file and note that fact.

Gifts From Foreign Corporations and Partnerships

The threshold for gifts from foreign corporations or foreign partnerships is far lower. For 2025 it is $20,116, and the figure is adjusted annually.{⁴ Check the current Form 3520 instructions before you file to confirm the year’s amount.

The two thresholds also count differently. The $100,000 figure is measured per donor or per related group of donors. The corporate/partnership figure aggregates gifts from all foreign entities together. A $12,000 gift from one foreign corporation plus a $9,000 gift from an unrelated foreign partnership combine to push you over.

Aggregating Related Donors

You have to combine gifts from related foreign donors when checking whether you hit either threshold. Receive $75,000 from one nonresident alien and $40,000 from another, and if you know or have reason to know they are related, the $115,000 total triggers reporting.{³ “Related” generally covers family members (siblings, spouses, ancestors, descendants, and their spouses) and entities where one person owns more than 50%.

Aggregation crosses the individual/entity line too. If a nonresident alien owns a foreign corporation that sends you $10,000, and the same person personally sends you $95,000, the corporate gift may need to be counted with the individual gift when applying the $100,000 threshold.{³

Filing Form 3520

If you meet either threshold, you report on Part IV of Form 3520, “Annual Return to Report Transactions With Foreign Trusts and Receipt of Certain Foreign Gifts.”{² For each reportable gift you need:

The foreign donor’s name, address, and taxpayer identification number if available, plus whether they are an individual, estate, corporation, or partnership.
The date of the gift and a description of what you received (cash, securities, real estate, and so on).
The fair market value on the date of the transfer, stated in U.S. dollars.

If the person who handed you the gift was acting for someone else, attach a statement identifying the actual source and their status. This conduit rule keeps donors from hiding behind intermediaries.

Form 3520 must be mailed separately from your income tax return; it cannot be filed electronically. The current mailing address is the IRS Service Center in Ogden, Utah. Verify the address against the latest instructions before you send it, because using the wrong address counts as a failure to file.{³

Deadline and Extensions

Form 3520 is due on the 15th day of the fourth month after your tax year ends. For calendar-year individuals, that means April 15.{³ If that date falls on a weekend or legal holiday, you have until the next business day.

U.S. citizens and residents living and working outside the country get an automatic extension to the 15th day of the sixth month (June 15 for calendar-year filers). Attach a statement confirming you meet the condition.{³

If you extend your income tax return, the Form 3520 deadline moves automatically to the 15th day of the tenth month (October 15 for most individuals). No separate extension request is needed. Check the box on the form indicating that an extension is in place.{³

A Foreign Trust Distribution Is Not a Foreign Gift

A common and costly mistake is treating a payment from a foreign trust as a foreign gift. From your side they can look identical. The tax treatment is not.

A genuine gift from a foreign individual or estate is not taxable income. You report it on Part IV of Form 3520 if you meet the threshold, and you owe no tax on the gift. A distribution from a foreign trust is generally taxable to the U.S. beneficiary and gets reported on Part III of Form 3520 under a separate set of rules.{² Foreign trust distributions can also trigger an interest charge on the tax owed, compounding over the years income accumulated inside the trust.

Even if your grandmother funded a trust and the payment feels like a family gift, the IRS treats it as a trust distribution when it comes from the trust rather than directly from her. Section 6039F specifically excludes any distribution properly disclosed as a foreign trust distribution under Section 6048.{¹ If you aren’t certain whether the source is a trust or an individual, answer that question before filing anything.

Penalties for Not Filing

The penalty structure under Section 6039F has two parts, and both apply when you fail to file a complete and accurate Form 3520 on time.

First, the IRS can determine the tax consequences of the gift. In practice, that means reclassifying what you treated as a tax-free gift as taxable income.{¹ A $300,000 gift that would have owed nothing becomes $300,000 of ordinary income, plus interest.

Second, you owe 5% of the unreported gift’s value for each month the failure continues, capped at 25%.{¹ At 5% per month, you hit the cap in five months. On a $500,000 gift, that is a $125,000 penalty before any income tax reclassification. The IRS assesses it on notice and demand, and you pay it the way you would pay a tax bill.

Both consequences stack. You can end up owing income tax on money that was never income, plus a six-figure penalty for not reporting it.

The Clock That Never Starts

The normal three-year statute of limitations on IRS assessments does not begin to run under IRC Section 6501(c)(8) until you file a complete and accurate information return.{⁵ If you never file Form 3520, the clock never starts. The IRS can come after you five, ten, or twenty years later. Filing a complete return finally starts the three-year period from that filing date.

If you received a large foreign gift years ago and never reported it, the problem does not age out. The 25% cap limits the monetary penalty, but the power to reclassify the gift as income stays open until you file.

Reasonable Cause

The only way to avoid the penalty is to show reasonable cause. The burden sits entirely on you: you must show you exercised ordinary care and prudence but still could not comply.{¹

Because Form 3520 is an information return, the IRS uses a two-part test. You must show you acted responsibly before and after the failure, and you must point to significant mitigating factors or events beyond your control.{⁶ Circumstances the IRS recognizes include natural disasters or civil disturbances, serious illness or death in your immediate family, inability to obtain necessary records, and first-time filing of the particular form combined with a good compliance history overall.

Some things do not qualify. General ignorance of the filing requirement almost never works. Reliance on a tax professional who failed to advise you is generally not accepted as a standalone defense.{⁶ And the fact that a foreign country would penalize you for disclosing the information is explicitly not reasonable cause.{⁷

If you missed the deadline, file the form as soon as you can and attach a written reasonable cause statement signed under penalties of perjury.{⁷ The form has to be complete and accurate to stop the penalty clock. An incomplete late filing does not count as filed.

1
Office of the Law Revision Counsel. 26 USC 6039F – Notice of Large Gifts Received From Foreign Persons
2
Internal Revenue Service. Gifts From Foreign Person
3
Internal Revenue Service. Instructions for Form 3520 (12/2025)
4
Internal Revenue Service. Rev. Proc. 2024-40
5
Internal Revenue Service. Overview of Statute of Limitations on the Assessment of Tax
6
Internal Revenue Service. Penalty Relief for Reasonable Cause
7
Internal Revenue Service. Failure to File the Form 3520/3520-A Penalties