This is the filing that most often reaches a foreign founder as a surprise, because everything they were told about a single-member LLC is true and still leads to the wrong conclusion. The entity is disregarded. It has no federal income tax return of its own. And it owes an information return every year regardless, with a $25,000 charge attached to not filing it. Nothing about revenue, activity or a US bank account changes that. The trigger is the combination of a US entity and a foreign owner.
What Form 5472 Actually Is
Form 5472 is the "Information Return of a 25% Foreign-Owned U.S. Corporation or a Foreign Corporation Engaged in a U.S. Trade or Business." It reports transactions between a foreign-owned US entity and its foreign owners or related parties.
Since the 2017 regulations took effect, the form is also required for foreign-owned US single-member LLCs treated as disregarded entities for federal tax purposes. Disregarded entities otherwise have no separate federal filing requirement; this rule creates one, and only for this purpose. The LLC remains disregarded for income tax, so the pro forma return reports no income and the owner's actual profit is taxed wherever the owner is taxed.
The form is filed annually as an attachment to Form 1120 (US Corporation Income Tax Return). For a foreign-owned SMLLC that has no separate tax filing requirement, the SMLLC must file a "proforma" Form 1120, a Form 1120 with only the identifying information filled in, used solely to attach Form 5472. The proforma 1120 is NOT a full tax return; the SMLLC's actual income is reported on the foreign owner's personal or entity-level return.
Who Must File Form 5472
At a Glance
| Item | Value |
|---|---|
| Form | IRS Form 5472 + Proforma Form 1120 |
| Who must file | Foreign-owned US single-member LLCs (disregarded entities) |
| Filing fee | $0, penalties are the issue |
| Penalty for non-filing | $25,000 per form per year (minimum) |
| Deadline | April 15 (same as Form 1120 for calendar-year entities) |
Three categories of entities must file Form 5472:
(1) A US CORPORATION that is at least 25% foreign-owned (directly or indirectly).
(2) A FOREIGN CORPORATION engaged in a US trade or business.
(3) A US SINGLE-MEMBER LLC that is treated as a disregarded entity for federal tax purposes AND is owned by a foreign person or entity. This is the category that catches foreign founders.
For the SMLLC category: "foreign person" means any individual who is not a US citizen or US resident alien, any foreign corporation, foreign partnership, foreign trust, or foreign estate. If the sole member of a US LLC is a UK resident, a Cayman Islands corporation, or a Singapore individual: Form 5472 applies.
The form applies even if the SMLLC has no US source income, no US business activity and no US bank account. Formation in a US state plus a foreign owner is the whole test. Owners weighing the structure in the first place should read forming a US LLC without an SSN and the single-member LLC guide alongside this one.
One thing that is no longer on the list. Federal beneficial ownership reporting was retired for companies formed in the United States by FinCEN's final rule of 11 August 2026, whoever owns them. A Wyoming LLC owned by a resident of Brazil therefore has nothing to file on that front and a mandatory Form 5472. The change is permanent, and it does nothing at all to this page's obligation.
Compliance monitoring
If you would rather not do this yourself, we track every deadline for your entity and file on time, in every state where you are registered. Or keep reading and file it on your own. This guide covers everything you need either way.
The $25,000 Penalty
The penalty for failing to file Form 5472 (or filing it late, or filing an incomplete form) is $25,000 PER FORM PER YEAR. This penalty applies even if there were no reportable transactions to report.
The penalty was increased from $10,000 to $25,000 by the Tax Cuts and Jobs Act effective for tax years beginning after December 31, 2017. The penalty is per entity per year, multiple years of non-filing means multiple $25,000 penalties.
The continuation charge is more specific than most summaries suggest, and worth reading precisely. If the failure continues for more than 90 days after the IRS notifies the reporting corporation, an additional $25,000 applies for each 30 day period, or part of a 30 day period, during which the failure continues after that 90 day window closes. The additional charge applies with respect to each related party for which a failure occurs. So an entity that ignores a notice for six months is not looking at one further $25,000; it is looking at $25,000 for each 30 day block after the 90 days ran out, multiplied by the number of related parties involved.
The IRS has actively assessed these penalties since 2018. Many foreign founders of US SMLLCs discover the requirement only after receiving an IRS notice, by which point years of penalties may have accrued.
What Counts as a Reportable Transaction
Form 5472 requires reporting any "reportable transaction" between the US entity and a foreign related party. The definition is extremely broad:
(1) Any sales, leases, licenses, or use of property between the parties.
(2) Any services performed between the parties.
(3) Any commissions paid or received.
(4) Any loans extended or received (including interest-free loans from owner to entity).
(5) Any capital contributions from the foreign owner to the SMLLC.
(6) Any distributions from the SMLLC to the foreign owner.
The capital contribution and distribution categories catch many founders: simply funding the LLC with the foreign owner's personal money is a reportable transaction. Withdrawing money from the LLC bank account is a reportable transaction. Even no-activity years can have reportable transactions if there are bank account interest deposits or service fees.
Form 5472 must be filed even if there are no reportable transactions. The form is required because the entity exists, not because money moved. A foreign-owned SMLLC with a US bank account and no activity for the year still files, with zero amounts reported.
Keeping this filable is a bookkeeping problem more than a tax problem. The reportable amounts are the owner-to-entity and entity-to-owner flows, and those are exactly the entries most likely to be recorded as unlabelled transfers between accounts the same person controls. A ledger that separates owner contributions from revenue and owner draws from expenses produces the numbers for Part IV in minutes; one that does not turns every March into forensic work. Bookkeeping for small business covers the account structure that makes this cheap.
How to File Form 5472
There are two routes and neither is electronic. A foreign-owned disregarded entity filing the pro forma package cannot e-file it. Fax the package, at 300 DPI or higher, to 855-887-7737. Or post it to: Internal Revenue Service, 1973 Rulon White Blvd., M/S 6112, Attn: PIN Unit, Ogden, UT 84201. Fax is the better option for anyone outside the United States, because it produces a transmission report with a date on it and international post does not.
Write FOREIGN-OWNED U.S. DE across the top of the pro forma Form 1120. This is what tells the service centre the return belongs in the 5472 stream rather than the corporate income tax stream, and packages arriving without it are routinely misrouted.
The deadline is April 15 of the year following the tax year (same as Form 1120 for calendar-year entities). Extensions are available via Form 7004, which extends the deadline 6 months to October 15. The extension does NOT extend the time to pay (but there is no tax liability on a proforma 1120, so this is rarely an issue).
The pro forma 1120 requires the entity name and EIN, the address, the formation state, and the foreign owner's identifying information. Only the identifying portion at the top of page one and the signature block are completed; the income and deduction lines stay empty. The form is signed by the foreign owner or an authorised representative. An entity that has never obtained an EIN cannot file at all, which is why the EIN and this return belong on the same formation checklist.
Form 5472 attached to the proforma 1120 reports: the foreign owner's information (name, address, country of residence, identifying number), nature of the relationship, and ALL reportable transactions during the year.
Three Foreign-Owned Entities in Practice
The three below are composites of entities inside this rule. The IRS figures, addresses and dates are the real ones; the business facts are illustrative.
Example 1: Aslan Tekstil and the dormant year
A textile exporter based in Izmir forms a Wyoming single-member LLC in March to hold a future US distribution business. The plan slips, the LLC trades nothing all year, and the only movements on its US account are the $4,200 the owner wired in to open it and $180 of bank charges. The owner assumes there is nothing to file. In fact the $4,200 contribution is a reportable transaction in its own right, and even without it the return would be due. The package is one pro forma Form 1120 marked FOREIGN-OWNED U.S. DE and one Form 5472 reporting a $4,200 capital contribution, faxed to 855-887-7737 before April 15. The alternative is $25,000 for a year in which the business earned nothing.
Example 2: Costa Verde Digital catches up on three years
A Sao Paulo developer formed a Delaware LLC in 2023, ran a modest consultancy through it, and filed nothing federal because a forum told him a disregarded entity has no return. He learns otherwise in 2026. Three missed years at $25,000 each is $75,000 of exposure before any continuation charge, and no notice has yet arrived. The route he takes is to prepare all three years of pro forma 1120s and Forms 5472 together, with a reasonable cause statement attached, and file them before the IRS writes rather than after. Coming forward voluntarily is not a guaranteed abatement, but the arithmetic is one-directional: the continuation charge only starts running 90 days after a notice, so every month before the notice arrives is a month the exposure is not compounding.
Example 3: Hokkaido Precision and the 25% corporate test
A Japanese manufacturer owns 40% of a US corporation that assembles and sells its components domestically. The US company files Form 1120 as a normal corporate return, and because a foreign person holds at least 25% of its stock by vote or by value, it also files Form 5472 for its transactions with the parent. In its first year those include $2.1m of inventory purchases, a $600,000 intercompany loan and $85,000 of management fees, and each category is reported separately. This is the original purpose of the form: transfer pricing visibility on cross-border related-party dealings. The disregarded entity rule bolted a much smaller population onto the same return. Which return the US entity files in the first place is covered in federal returns by entity type, and the classification behind it in Form 8832.
Common Form 5472 Mistakes
Five failures produce nearly every Form 5472 penalty notice. The first one accounts for most of them by a wide margin.
Mistake 1: Not knowing the filing exists
What happens. A foreign founder forms a US single-member LLC, reads that a disregarded entity has no federal return, and files nothing. Why it fails. The 2017 regulations treat a foreign-owned disregarded entity as a corporation for this reporting purpose only, which creates a return where the income tax rules create none. Consequence. $25,000 per missed year, discovered on average several years in. Prevention. Diarise the filing at formation, in the same week as the EIN, and treat it as recurring rather than conditional.
Mistake 2: Filing only in years with real activity
What happens. The owner files for the trading years and skips the dormant ones. Why it fails. The obligation attaches to the entity's existence. A year with no transactions is a year with a zero return, not a year with no return. Consequence. A $25,000 charge for a year in which the entity earned nothing, which is the least defensible penalty in this area. Prevention. File every year until the entity is properly dissolved with the state.
Mistake 3: Sending Form 5472 on its own
What happens. Form 5472 is completed and posted without a Form 1120 behind it. Why it fails. Form 5472 is an attachment. For an entity with no other return, the pro forma 1120 is what it attaches to, and it must be marked FOREIGN-OWNED U.S. DE across the top. Consequence. An incomplete filing, treated as no filing, with the full charge available. Prevention. Send the pair, and keep the fax transmission report.
Mistake 4: Leaving out money moved between the owner and the LLC
What happens. Capital the owner put in and cash the owner took out are omitted, on the view that moving your own money is not a transaction. Why it fails. Contributions and distributions are expressly reportable, as are interest-free loans in either direction. Consequence. An incomplete Form 5472, which carries the same charge as not filing. Prevention. Label owner transfers in the ledger as they happen; reconstructing them from bank statements a year later is where errors enter.
Mistake 5: Missing the date without filing Form 7004
What happens. April passes, the package is prepared over the summer, and no extension was filed. Why it fails. Form 7004 extends this return by six months, to October 15 for a calendar year filer, and costs nothing. Without it the return is simply late. Consequence. $25,000 for a filing that was a fortnight from ready. Prevention. File Form 7004 by April 15 as a default every year, whether or not you expect to need it. There is no tax to pay with it, so the usual extension trap does not apply here.
Catching Up on Past Years
If you discover you should have been filing Form 5472 for past years, the IRS offers a fast procedure for foreign-owned SMLLCs that has produced reasonable penalty abatement results in many cases.
The fast approach: file all delinquent Forms 5472 and proforma 1120s for the missed years, attach a "reasonable cause" statement explaining the late filing (typically: lack of awareness of the requirement, reasonable reliance on incorrect professional advice, or formation service that did not warn of the filing requirement).
Outcomes vary. The IRS has shown willingness to abate penalties for first-time filers with reasonable cause. Repeat offenders or willful non-filers face the full penalty.
Recommendation: do not sit on a missed filing once you know about it. The base charge does not grow with time on its own, but the continuation charge does once a notice has been issued, and coming forward before the notice keeps that clock from starting. Where the entity also has US-source income or an owner with personal US filing obligations, the ITIN application and the W-8 BEN documentation usually need attention in the same pass, and where the LLC has US employees or contractors, so do payroll returns and 1099 reporting.
How File.Business Handles Form 5472
File.Business prepares and files Form 5472 + proforma 1120 for foreign-owned SMLLCs as part of our compliance service for international founders. The service includes: confirming Form 5472 applicability (single-member LLC + foreign owner = required); identifying all reportable transactions for the year (capital contributions, distributions, related-party transactions); preparing the proforma 1120 with identifying information; preparing Form 5472 with complete owner information and transaction detail; mailing the package to the IRS Ogden, UT service center; tracking confirmation and IRS correspondence.
For catch-up filings: we prepare delinquent years' Forms 5472 + proforma 1120 with a reasonable-cause statement requesting penalty abatement. Standalone annual filing service: $399 per year. Catch-up filing (per missed year): $499. We strongly recommend catching up immediately upon discovery rather than waiting for an IRS notice.
Frequently Asked Questions
Does every foreign-owned US LLC have to file Form 5472?
Single-member LLCs (disregarded entities) owned by foreign persons must file Form 5472 + proforma Form 1120 every year, even with no income or activity. Multi-member LLCs (partnerships) have separate rules and may or may not require Form 5472 depending on ownership and transactions.
What is the penalty for not filing Form 5472?
$25,000 per form per year (minimum). Additional $25,000 per month if the failure continues after IRS notification. The penalty applies even if there were no reportable transactions to report.
Do I have to file Form 5472 if my LLC had no activity?
Yes. The form is required for the entity's existence, not just for transactions. A foreign-owned SMLLC with no activity files Form 5472 with zero amounts but still must file.
When is Form 5472 due?
April 15 of the year following the tax year (for calendar-year entities). Extensions to October 15 are available via Form 7004.
What is the "proforma Form 1120" requirement?
Foreign-owned SMLLCs that have no separate corporate income tax filing requirement must file a proforma Form 1120, a Form 1120 with only identifying information filled in, solely to serve as a vehicle for attaching Form 5472. The SMLLC's actual income is reported elsewhere.
Can I catch up on past Form 5472 filings without penalty?
Possibly. The IRS has shown willingness to abate penalties for first-time non-filers who voluntarily come into compliance with a reasonable-cause statement. Outcomes vary. Do not ignore a missed filing once discovered.
Can File.Business file Form 5472 for me?
Yes. File.Business prepares and files Form 5472 + proforma 1120 for foreign-owned SMLLCs as a standalone or annual service. Standalone annual filing: $399. Catch-up filings (per missed year): $499.
File.Business handles federal compliance for you
From EIN to Form 5472, federal filings stack up fast. File.Business pairs your entity with the right federal filings on a single calendar, with deadline tracking, automatic preparation, and CPA partnership for income tax returns.
This guide is written from the official sources below. Fees, forms, and deadlines change; confirm the current requirement with the agency before you file.
Disclosure. File.Business is a private filing service, not a government agency and not a law firm. We prepare and submit filings at your direction, and nothing on this page is legal or tax advice. Filing fees, deadlines, and statutory references are current as of the last-updated date shown above and can change. Confirm current requirements with the relevant state agency before you file.
