Form 5472 for Foreign-Owned Single-Member LLCs: Complete 2026 Guide

A single-member LLC (SMLLC) is a limited liability company with a single owner, called a member. When that member is a non-resident alien individual or a foreign company, the LLC is a foreign-owned single-member LLC. It is the single most common business structure used by non-US founders selling into the United States — Amazon FBA sellers, SaaS founders, freelancers, dropshippers, and consultants almost all use one.

By default, the IRS treats a domestic single-member LLC as a disregarded entityunder the check-the-box regulations of Treasury Regulation §301.7701-3. “Disregarded” means the entity is transparent: for federal income tax the IRS looks straight through the LLC to its owner, as if the LLC did not exist. A US-resident owner simply reports the LLC's activity on a Schedule C or their personal return.

For a foreign owner, though, that transparency creates a problem the IRS closed in 2017. If the entity is invisible and its non-resident owner has no US tax filing, the IRS has no window into money flowing between the foreign owner and the US business. To restore that visibility, the rules now treat a foreign-owned disregarded LLC as a corporation for one narrow purpose: the information reporting rules of Internal Revenue Code section 6038A.

Before 2017, a foreign-owned single-member LLC fell into a reporting gap. Because the entity was disregarded and its non-resident owner often had no obligation to file a US return, transactions between the two were effectively invisible to the IRS. Foreign owners could move money in and out of a US LLC with no disclosure at all. The Treasury Department closed that gap with final regulations issued on December 13, 2016, published as Treasury Decision 9796.

The mechanism is precise. T.D. 9796 added Treasury Regulation §301.7701-2(c)(2)(vi), which provides that a domestic disregarded entity wholly owned by one foreign person is treated as a domestic corporation separate from its owner for the limited purposes of the reporting, record-maintenance, and associated compliance requirements under section 6038A. The entity remains disregarded for every other federal tax purpose — it still pays no entity-level income tax.

That single sentence is why a zero-revenue, single-owner LLC with no employees and no profit must still complete a corporate-style information return. The regulation applies to tax years beginning on or after January 1, 2017, with filings due on or after that date. Every year since, a foreign-owned SMLLC has been inside the section 6038A reporting net.

Because the entity is treated as a corporation for section 6038A, it needs its own federal tax identification number — an EIN. The EIN goes on the pro forma Form 1120 and on Form 5472 in Part I. Without it, the IRS cannot match the return to the entity, and the package cannot be processed.

A non-resident founder who has no Social Security Number cannot use the IRS online EIN tool, which requires an SSN or ITIN. Instead, the founder files Form SS-4 (Application for Employer Identification Number) by fax or mail. On line 7b, where the form asks for the Responsible Party's SSN, ITIN, or EIN, a foreign individual with no US tax ID writes “Foreign”. The IRS accepts this and issues the EIN.

How long it takes

Fax applications typically return an EIN in about 4 business days if a return fax number is supplied, though IRS processing for foreign applicants commonly runs 4 to 8 weeks. Mailed applications can take longer. Because the EIN is a prerequisite to filing Form 5472 — and the filing deadline is fixed at April 15 — a foreign founder should apply for the EIN as soon as the LLC is formed, not in March of the following year.

Form 5472 cannot travel to the IRS on its own. The regulations require it to be attached to an income-tax return, and the only return available to a disregarded entity treated as a corporation is the pro forma Form 1120. “Pro forma” means “as a matter of form”: the 1120 here is a cover sheet, not a tax calculation.

What you complete — and what you leave blank

On the pro forma 1120 you fill in only the entity identification block at the top of page 1: the LLC's legal name, US mailing address, EIN, the date and state it was formed, and the total-assets line (Item D). You write “Foreign-owned U.S. DE” across the top of the form. Every income, deduction, credit, and tax line — the entire body of the 1120 — stays blank, because a disregarded entity pays no entity-level federal income tax. Form 5472 is stapled behind the pro forma 1120, and the two are filed together as a single package.

If the LLC dealt with more than one related foreign party during the year, it files a separate Form 5472 for each party, all attached to the same single pro forma 1120. A typical single-owner LLC with one foreign member files exactly one Form 5472 and one pro forma 1120.

This is the point that catches almost every founder. People assume Form 5472 applies only to companies that earned money. It does not. The trigger is a transaction, not a profit. The moment you wire money from your personal account to capitalize your LLC, you have created a reportable transaction with a related party — and section 6038A reporting is switched on for the year.

Because forming and funding an LLC always involves moving money from the owner into the company, virtually every foreign-owned single-member LLC has at least one reportable transactionin its first year. That is why the practical answer to “do I have to file?” is almost always yes. Even a dormant LLC usually has a reportable transaction, because the owner personally paid the state registration or registered- agent fee.

There is no de minimis threshold. A $1 capital contribution is just as reportable as a $1 million one. The form discloses the category and dollar amount of each transaction; it does not exempt small amounts. If you are not sure whether your LLC had a reportable transaction, the /do-i-need-to-file/ qualifier walks through it in under a minute.

This is the most widely misunderstood mechanic of the whole process: there is no e-file path for a foreign-owned disregarded entity filing a pro forma 1120 with Form 5472. Commercial tax software that e-files ordinary corporate returns will not transmit this package, because the IRS routes it to a dedicated address. The only two accepted methods are mail and fax.

Because timely filing is the only defense against the $25,000 penalty, dated proof of submission matters. A faxed confirmation sheet or a certified-mail green card establishes the filing date if the IRS later questions whether — or when — you filed. A step-by-step walkthrough is in the /how-to-file-form-5472/ guide.

The order of operations

For a foreign-owned single-member LLC the sequence is fixed: (1) form the LLC, (2) obtain the EIN on Form SS-4, (3) total up the year's reportable transactions, (4) complete Form 5472, (5) attach it to a pro forma Form 1120 marked “Foreign-owned U.S. DE,” and (6) mail or fax the package by April 15. Skipping the pro forma 1120 — filing only Form 5472 — is a common error that the IRS treats as a non-filing.

A foreign-owned single-member LLC is a calendar-year filer in almost every case, so its Form 5472 follows the corporate calendar-year deadline of April 15. To push the deadline back six months, file Form 7004 (Application for Automatic Extension) by April 15; that moves the filing deadline to October 15.

The extension only moves the filing deadline. Because a disregarded entity owes no entity-level income tax, there is no payment to extend and nothing else to do — the extension simply buys six more months to complete and file the package. File Form 7004 to the same Austin address, by the same April 15 date, to claim it.

Form 5472 carries one of the harshest information-return penalties in the US tax code. The base penalty is $25,000 for each form not filed, filed late, or filed substantially incomplete. The same $25,000 also applies to a failure to maintain the records section 6038A requires. Because there is no statute of limitations on an unfiled information return, a year you missed five years ago can still be assessed today.

The penalty compounds. If the IRS sends a notice of failure and the form is still not filed within 90 days, an additional $25,000 applies for each 30-day period — or fraction of one — that the failure continues, with no ceiling. A founder who ignored the form for three years could face $75,000 before any continuation penalties even begin.

See the /penalty-calculator/ to estimate exposure across multiple unfiled years, and the /form-5472-penalty/ guide for how assessment and reasonable-cause abatement work in practice. The IRS may abate the penalty if the entity can show reasonable cause for the failure — but that relief is discretionary, never guaranteed, and far more difficult than filing on time in the first place.

The exemption is narrow and rarely helps a founder-owned LLC. The rule is simple: if the LLC had no reportable transaction with any related foreign party for the entire year, it has nothing to report and does not file. In practice this almost never happens — and never in the first year — because forming and funding the LLC creates a reportable transaction on day one.

Because the exemption is so limited, the safe assumption for any foreign-owned single-member LLC is that it must file. Treating “I had no income” as “I had no reportable transaction” is the single most expensive misunderstanding a foreign founder can make, because the two are not the same thing.

The IRS itself charges no fee to file Form 5472 — there is no filing fee, no submission fee, and no separate charge for an active entity. The cost is the risk: the $25,000 penalty applies even to an honest mistake, a missed deadline, or an incomplete form. That is why most foreign founders pay a specialist rather than risk a five-figure penalty on a do-it-yourself attempt.

For a flat $299, form5472.tax prepares Form 5472 and the pro forma Form 1120, has a specialist review it, and files it the correct way — saving $248 versus form5472.online and up to $1,700versus doola. If you currently pay doola or Firstbase for bundled compliance, the /switch-from-doola-firstbase/ guide shows how to move to the same filing for $299.

This step surprises almost every first-time filer. After you mail the pro forma Form 1120 with Form 5472 to P.O. Box 149342, Austin, TX 78714-9342, or fax it to 855-887-7737, the IRS does notrespond. There is no acknowledgement letter, no stamped copy returned, no confirmation number, and no online status page where a foreign-owned single-member LLC can look up whether its Form 5472 was received. Because a disregarded entity cannot e-file, there is also no e-file acceptance notice. Silence is the normal, expected outcome of a correctly filed return.

That silence is exactly why your dated proof of submission matters so much. The fax transmission confirmation sheet — or the certified-mail green card and tracking record — is the only evidence that establishes when you filed. Since the $25,000 penalty under IRC §6038A(d) turns entirely on whether you filed on time, that single piece of paper is the difference between a non-event and a five-figure assessment if the IRS ever questions the filing. Save it with your records, not in your inbox.

How long to keep the records

Section 6038A is also a record-keeping rule, not just a filing rule. The entity must keep the books, invoices, contracts, and ledgers that support every reportable transaction reported on Form 5472, and the IRS can request them during an examination. As a practical floor, keep the filed package and its supporting records for at least 7 years — and longer is safer, because an unfiled Form 5472 carries no statute of limitations, so the IRS can reach back to any year it believes was never filed.

The most important thing that happens after filing is that the clock resets. Form 5472 is an annualobligation: a foreign-owned single-member LLC that filed for the 2025 tax year must file again for 2026 by April 15, 2027, and every year the LLC exists and has a reportable transaction. There is no “one and done.” If you would rather not track the deadline yourself, form5472.tax prepares, reviews, and files the package each year for a flat $299 — and you keep the proof.