Form 5472 has no due date of its own. It is filed as an attachment to the reporting corporation’s income tax return, so the Form 5472 due date is whatever due date applies to that return: April 15 for a calendar-year corporation, or the 15th day of the fourth month after the end of a fiscal year.1Internal Revenue Service. Instructions for Form 5472 Miss it, and the penalty starts at $25,000 per form with no statutory cap on how high it can climb.
The Deadline in Plain Terms
Form 5472 rides along with Form 1120 for a U.S. corporation, or Form 1120-F for a foreign corporation. Whatever due date governs the underlying return governs the attached 5472.1Internal Revenue Service. Instructions for Form 5472
For a calendar-year corporation (January 1 through December 31), the return is due April 15 of the following year. For a fiscal-year corporation, it is due on the 15th day of the fourth month after the fiscal year closes. When that date lands on a Saturday, Sunday, or legal holiday, the deadline moves to the next business day.2Office of the Law Revision Counsel. 26 U.S. Code 7503 – Time for Performance of Acts Where Last Day Falls on Saturday, Sunday, or Legal Holiday
Short tax years follow the same logic. If the corporation dissolves or ends its year early, Form 5472 is due when the short-period return is due. For a foreign-owned disregarded entity that dissolves, transactions tied to the wind-up, including final distributions to the owner, go in Part V of the form.1Internal Revenue Service. Instructions for Form 5472
Getting a Six-Month Extension
Filing Form 7004 before the original due date gives an automatic six-month extension.3Internal Revenue Service. Instructions for Form 7004 (12/2025) For a calendar-year filer, that moves the deadline from April 15 to October 15. Because Form 5472 is attached to the corporate return, the extension covers both. There is no separate extension mechanism for Form 5472 itself.
On Form 7004, enter form code 12 for Form 1120.4Internal Revenue Service. Form 7004 (Rev. December 2025) One narrow exception to the six-month rule: C corporations with tax years ending June 30 that began before January 1, 2026, get an automatic seven-month extension instead.3Internal Revenue Service. Instructions for Form 7004 (12/2025)
The extension must be requested before the original deadline. Filing Form 7004 after April 15 does nothing for a calendar-year filer, and the return, along with the attached 5472, is already late.
Foreign-Owned Disregarded Entities: Same Deadline, Different Path
A foreign-owned U.S. disregarded entity, most often a single-member LLC owned by a foreign person, normally has no income tax return to file. For Form 5472 purposes, it must file a pro forma Form 1120 that exists only to carry the attached 5472.1Internal Revenue Service. Instructions for Form 5472 The deadline is the same: April 15 for a calendar-year entity.
The entity needs an Employer Identification Number to file, so obtaining one well ahead of April is a practical first step. To extend the deadline to October 15, file Form 7004 by April 15 using form code 12 and write “Foreign-owned U.S. DE” across the top of the form.3Internal Revenue Service. Instructions for Form 7004 (12/2025)
Submission is different too. A foreign-owned disregarded entity cannot e-file its pro forma Form 1120 and must submit by mail or fax:1Internal Revenue Service. Instructions for Form 5472
- Mail: Internal Revenue Service, 1973 Rulon White Blvd., M/S 6112, Attn: PIN Unit, Ogden, UT 84201
- Fax: 855-887-7737, at 300 DPI resolution or higher
Standard U.S. corporations simply attach Form 5472 to Form 1120 and submit through their usual channel. Any corporation that files 10 or more returns of any type during the calendar year is required to e-file.5Internal Revenue Service. Instructions for Form 1120
What Happens If You Miss the Deadline
The penalty for failing to file a timely, complete Form 5472 is $25,000 per form.6Internal Revenue Service. International Information Reporting Penalties That amount applies per related party, per year. A corporation with reportable transactions with three foreign related parties that missed the deadline on all three faces $75,000 up front.
It escalates. If the IRS sends a failure notice and the corporation still does not file within 90 days, an additional $25,000 penalty kicks in for each subsequent 30-day period (or any fraction of one) that the failure continues.7Office of the Law Revision Counsel. 26 USC 6038A – Information With Respect to Certain Foreign-Owned Corporations There is no statutory cap on the continuation penalty.6Internal Revenue Service. International Information Reporting Penalties A single form left unfiled for a year after the IRS notice can generate well over $100,000 in penalties. Willful failure to file or maintain the underlying records can also expose the corporation to criminal liability.
The Statute of Limitations Stays Open
This is the consequence that catches people off guard. When a reporting corporation fails to file Form 5472, the normal three-year statute of limitations on the IRS’s ability to assess additional tax does not begin to run. The assessment period stays open until three years after the IRS finally receives the required information. A missing Form 5472 leaves the entire tax return open to audit for as long as the form is missing. If the failure was due to reasonable cause rather than willful neglect, the open statute is limited to the items related to the missing form rather than the whole return.8Office of the Law Revision Counsel. 26 U.S. Code 6501 – Limitations on Assessment and Collection
Filing a Late Form 5472
If you discover that a prior-year Form 5472 was missed and the IRS has not yet contacted you about it, there is a specific path. Under the delinquent international information return submission procedures, attach the late Form 5472 to an amended income tax return and file it through normal channels.9Internal Revenue Service. Delinquent International Information Return Submission Procedures These procedures are available only if you are not already under IRS examination or criminal investigation for the missing returns.
Penalties can still be assessed even when you come forward voluntarily. Attach a reasonable cause statement to each delinquent form explaining why the filing was late.9Internal Revenue Service. Delinquent International Information Return Submission Procedures The IRS may initially assess penalties during processing without reviewing that statement, so expect follow-up correspondence and be ready to resubmit your explanation. Coming forward before the IRS identifies the problem puts you in a far stronger position than waiting for a notice.
Asking the IRS to Waive the Penalty
The IRS can waive Form 5472 penalties when a corporation shows reasonable cause. The determination is case-by-case. The IRS looks at two things: whether the corporation acted responsibly both before and after the failure, and whether significant mitigating factors or events beyond the corporation’s control contributed to it.10Internal Revenue Service. Penalty Relief for Reasonable Cause
Acting responsibly means requesting extensions when possible, trying to prevent the failure, and correcting it as soon as it is discovered. Mitigating factors that support relief include being a first-time filer of the form, having a clean compliance history, and being unable to access relevant business records. Not knowing about the filing requirement, or relying on a tax professional who missed it, generally does not qualify as reasonable cause.10Internal Revenue Service. Penalty Relief for Reasonable Cause
To request relief, call the number printed on the IRS penalty notice. If the request cannot be approved over the phone, submit a written request using Form 843 with documentation supporting your explanation.