What must a U.S. LLC owned by a foreign person file? Form 5472 + pro forma 1120, EIN, and the US$25,000 penalty
Key point: A single-member LLC wholly owned by a foreign person (a 'disregarded entity' for tax purposes), even if it has no actual U.S. operations and owes no income tax, must, under IRC Section 6038A, first obtain an EIN and then annually file a 'pro forma Form 1120 with Form 5472 attached' if it has reportable transactions (contributions, distributions, loans, fund transfers, etc.) with the foreign owner during the year. Failure to file a single Form 5472 triggers a minimum penalty of US$25,000. The following is organized based on official IRS rules; consult a U.S. tax professional for your specific case.
Why file even if no tax is owed: Form 5472 is an information return, not an income tax return
Key concept: A U.S. domestic disregarded entity (single-member LLC) wholly owned by a foreign person is treated, for purposes of Section 6038A reporting, as a U.S. corporation separate from its owner. Therefore, even if the LLC has no U.S.-source income and owes no U.S. income tax for the year, it must file a pro forma Form 1120 with Form 5472 attached before the filing deadline (including extensions) if it had reportable transactions with the foreign owner. The form asks not 'how much tax you owe,' but 'what transactions occurred between you and the overseas owner.'
Source：US IRS — Instructions for Form 5472
Three items are indispensable: EIN, pro forma Form 1120, and Form 5472
In practice, three items are required: ① EIN—the company's tax ID number, which a foreign owner can obtain via Form SS-4 even without a U.S. Social Security Number (SSN) or ITIN; ② pro forma Form 1120—a one-page corporate tax return with only the header completed, marked 'Solely for Attachment with Form 5472,' not actually computing corporate income tax; ③ Form 5472—itemizing transactions between you and the LLC. All three must be filed together in the prescribed manner (mailed or faxed to the IRS designated location).
Source：US IRS — About Form 5472
What constitutes a 'reportable transaction': It's not just about 'making money'
A common misconception is that if the company had no business or income, no filing is required. In reality, the owner's capital contributions to the LLC, distributions from the LLC to the owner, loans, advances, fund transfers, asset sales, etc., between the two may constitute 'reportable transactions.' That is, if you have ever transferred money into or out of the LLC, a filing obligation is generally triggered—regardless of whether there was operating income. Whether a specific transaction is reportable depends on IRS rules and consultation with a tax professional.
Source：US IRS — Instructions for Form 5472
Penalties and deadlines: Failure to file a single Form 5472 triggers a minimum penalty of US$25,000, with additional penalties for continued non-compliance
Per IRS rules, failure to file Form 5472 on time and in the prescribed manner results in a minimum penalty of US$25,000 per form; if not filed within 90 days after IRS notice, an additional US$25,000 penalty applies for each 30-day period (or fraction thereof) thereafter, accumulating continuously. The filing deadline is the same as that of the LLC's Form 1120—generally April 15 of the following year for calendar-year entities, with an automatic extension available via Form 7004, which also extends the Form 5472 deadline. Other filings such as FBAR, state tax, or individual Form 1040-NR may also be required; consult a U.S. tax professional for your specific situation.
Source：US IRS — International information reporting penalties
Frequently Asked Questions
My U.S. LLC had no business and no income all year; do I still need to file Form 5472?
Likely yes. A single-member LLC wholly owned by a foreign person, if it has reportable transactions (such as contributions, distributions, loans, etc.) with the foreign owner, must file pro forma Form 1120 + Form 5472 even if it has no U.S.-source income and owes no income tax. Whether reportable transactions exist and the applicability depend on IRS rules and consultation with a tax professional.
What is the penalty for failing to file Form 5472?
Per IRS rules, failure to file on time and in the prescribed manner results in a minimum penalty of US$25,000 per Form 5472; if not filed within 90 days after IRS notice, an additional US$25,000 penalty applies for each 30-day period (or fraction thereof) thereafter, accumulating continuously.
Can I apply for an EIN without a U.S. Social Security Number (SSN)?
Yes. A foreign owner may apply for an EIN for the company using Form SS-4 without first obtaining an SSN or ITIN; the application method and required documents are subject to the latest IRS rules.
When is Form 5472 due? Can it be extended?
The deadline is the same as that of the LLC's pro forma Form 1120 (generally April 15 of the following year for calendar-year entities), and an automatic extension may be obtained via Form 7004, which also extends the Form 5472 deadline.
If I file in the U.S., do I also need to file in Taiwan?
The two are separate. Form 5472 is an information return for the U.S.; if a Taiwan individual remains a tax resident, overseas income and Controlled Foreign Company (CFC) rules may impose additional filing obligations (see our 'Taiwan CFC' summary; for individual tax residency status, see sister site AI Visa Map). Consult tax professionals in both jurisdictions for your specific case.
Official data sources
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