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Form 5472 Explained: Who Must File and What Happens If You Don't

By FlowTex Accounting · November 2, 2026

If a person outside the United States owns your U.S. LLC, one filing matters more than most: Form 5472. It is easy to overlook because the LLC may have no income, no employees, and no tax due. The penalty for missing it is still steep.

Who has to file

Under the IRS instructions for Form 5472, a “reporting corporation” must file if it had a reportable transaction with a related party. Reporting corporations include:

  • U.S. corporations that are at least 25% foreign-owned, and
  • foreign-owned U.S. disregarded entities, meaning a U.S. entity such as a single-member LLC that is wholly owned by a foreign person, and
  • foreign corporations engaged in a U.S. trade or business.

A single-member LLC is normally “disregarded” for income tax. For this purpose, though, the IRS treats a foreign-owned one as a corporation separate from its owner.

What counts as a reportable transaction

The form covers dealings between the LLC and its foreign owner or other related parties. The instructions list the types. They include transactions where money is the only thing exchanged, and other categories described in the form’s parts IV, V, and VI. As a general idea, think of money moving between the owner and the LLC, such as contributions, loans, distributions, and payments for services. Review the current instructions with your preparer to see what applies to you.

How a foreign-owned disregarded LLC files

  • The LLC files a pro forma Form 1120 with Form 5472 attached.
  • On that Form 1120, only the entity’s name and address and items B and E on page 1 are required.
  • The entity uses its owner’s U.S. tax year, or the calendar year if there is none.
  • It cannot e-file Form 5472. The instructions give a special IRS mailing address and fax number to use instead of the normal Form 1120 address.

When it is due

Form 5472 is due with the reporting corporation’s income tax return, by that return’s due date including extensions. For a foreign-owned disregarded LLC, that means the due date of the pro forma Form 1120. For a calendar-year entity, that is generally April 15, with extensions available.

The penalty

The IRS instructions say that failing to file Form 5472 on time or in the required manner, or failing to keep the required records, carries a $25,000 penalty. A form that is substantially incomplete counts as a failure to file.

If the failure continues more than 90 days after the IRS sends notice, an additional $25,000 applies, plus more penalties for each 30-day period it continues, for each related party involved.

That is a lot of money for an LLC that may have earned nothing. Filing late is better than not filing, but on-time filing is the goal.

Practical steps

  1. Keep clean records of every transaction between the LLC and its owner, including the date, amount, and purpose.
  2. Keep the LLC’s money separate from the owner’s personal money (see separating business and personal finances).
  3. Get an EIN for the LLC if it doesn’t have one (how to apply).
  4. Plan the filing before the due date. Mail takes time, and you can’t file it electronically.

If you want us to look at your LLC’s reporting, book a call with FlowTex.


Sources

This article is general information, not tax or legal advice. Filing rules depend on ownership and facts. Talk to a qualified professional about your LLC.

foreign-owned LLCForm 5472IRScompliance

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