What are the IRS penalties for failing to file Form 3520 or not reporting a foreign gift?
Form 3520 penalties are substantial. Late filing carries a 5% per month penalty up to 25% of the gross reportable amount, and unreported foreign gifts over $100,000 from an individual or the inflation-adjusted annual threshold from a foreign entity can trigger a 35% penalty on the unreported amount. The IRS has aggressively assessed these penalties even for trivial cases.
When Form 3520 is required:
- Gift over $100,000 from a nonresident alien individual or foreign estate
- Gift over the inflation-adjusted annual threshold from a foreign corporation or partnership
- Foreign trust distribution received by a U.S. person
- Creation or transfer to a foreign trust by a U.S. person
Penalty structure:
| Violation | Penalty |
| Late Form 3520 for foreign trust transaction | 35% of gross reportable amount |
| Late Form 3520 for unreported foreign gift | 5% per month up to 25% |
| Form 3520-A (trustee return) not filed | 5% of trust asset value |
| Willful violations | Up to 75% |
Common problem areas:
- Late filing, even when the gift was fully legal and non-taxable
- Inheritance from foreign relatives was missed entirely
- Foreign trust distributions misidentified as simple wire transfers
- IRS automated penalty assessment without human review
Relief paths:
- Reasonable cause statement (narrowly granted)
- Delinquent International Information Return Submission Procedure if no tax is due
- Streamlined Foreign Offshore if fitting the overall non-willful fact pattern
For Form 3520 and gift tax help, see our Gift Tax Reporting Guide.
Last updated on April 29, 2026
