Key takeaways
- A foreign-owned single-member LLC treated as a disregarded entity must file Form 5472 attached to a pro forma Form 1120 for any year it has a reportable transaction with a related party. This rule has applied since the 2017 tax year.
- The forms cannot be e-filed. They go to a dedicated IRS unit by mail or fax with the words Foreign-owned U.S. DE written across the top, and the LLC must already have an EIN.
- A missing or substantially incomplete Form 5472 carries a $25,000 penalty, with further $25,000 amounts if the failure continues after IRS notice. Filing one form without the other counts as a failure to file.
Before you start
- Confirm whether your LLC is foreign-owned and treated as a disregarded entity, because that exact combination is what triggers the Form 5472 and pro forma 1120 requirement.
- Make sure the LLC has its own EIN well before the deadline, since the forms cannot be filed without one.
- Decide which mailing address the IRS should use for your entity, because foreign owners often cannot rely on a US home address and need a stable business address that forwards official mail.
Who this is for
- Non-resident founders who own a US single-member LLC and are unsure what they have to file each year.
- Foreign owners who moved money into or out of their LLC and want to know whether that counts as a reportable transaction.
- Anyone who formed a US LLC from abroad and needs a reliable US address for IRS correspondence and for the forms themselves.
If you own a US single-member LLC from outside the country, one federal information return surprises many foreign founders: Form 5472, attached to a mostly blank pro forma Form 1120. It is not an income tax bill by itself, but skipping it carries a $25,000 penalty.
Who Has to File: Foreign-Owned, Single-Member, and Disregarded
The requirement applies to a specific combination. Your LLC has a single owner, that owner is a foreign person, and the LLC is treated as a disregarded entity for US tax purposes, which is the default for a domestic single-member LLC that has not elected to be taxed as a corporation.
Since tax years beginning on or after January 1, 2017, a foreign-owned domestic disregarded entity is treated as a separate corporation for the limited purpose of these reporting rules. That is why a single-member LLC, which normally files nothing of its own, can still owe Form 5472.
Two conditions, both required
You file when the LLC is foreign-owned and a disregarded entity and it had a reportable transaction during the year. If you elected corporate taxation, different rules apply, and you should confirm your classification with a cross-border tax professional.
What Counts as a Reportable Transaction
The trigger is a reportable transaction with a related party, usually you as the owner or another business you control. The definition is broader than many founders expect, because for a foreign-owned disregarded entity it reaches the basic money movements that almost every LLC has.
- Contributions of capital into the LLC, including the money you put in to get started.
- Distributions out of the LLC back to you as the owner.
- Loans between you and the LLC in either direction.
- Payments for sales, services, rent, royalties, or interest between the LLC and a related party.
A quiet LLC can still owe the form
Because funding the LLC or paying yourself can count, an LLC that feels dormant may still have a reportable transaction. Do not assume zero activity means no filing. Confirm with a tax professional before you skip a year.
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The Pro Forma 1120 and How You Actually File
Form 5472 does not travel alone. For a foreign-owned disregarded entity it attaches to a pro forma Form 1120, which means a Form 1120 used only as a cover. You complete the entity name, address, and EIN at the top and leave the income tax portions blank, then write Foreign-owned U.S. DE across the top of both forms.
| Step | Detail |
|---|---|
| Get an EIN first | The LLC needs its own EIN before filing, even if the owner has no SSN or ITIN. |
| Prepare both forms | Form 5472 plus a pro forma Form 1120 used as a cover sheet, marked Foreign-owned U.S. DE at the top. |
| No e-file | These forms cannot be electronically filed. They are submitted by mail or fax to a dedicated IRS unit. |
| Send together | Both forms go in one package. Sending one without the other is treated as a failure to file. |
The pro forma 1120 is mostly a cover for Form 5472, not a separate income tax return for the LLC.
The IRS publishes the current mailing address and fax number in the Form 5472 instructions, so always check the latest version rather than an older copy before you send anything.
The $25,000 Penalty, and Why Completeness Matters
The penalty is what makes this form worth taking seriously. The IRS may assess $25,000 for each Form 5472 that is not filed by the due date or is substantially incomplete. If the failure continues for more than 90 days after the IRS sends a notice, additional $25,000 amounts can apply for each 30-day period that follows.
- Filing late, or filing something incomplete, can both trigger the penalty.
- Filing Form 5472 without the pro forma 1120, or the reverse, is treated as not filing at all.
- The penalty is per form and per related party, so a complex structure can multiply the exposure.
You have to receive the notice to respond
The continuation penalty starts after the IRS mails a notice. If that notice goes to an address you no longer monitor, the clock can run while you are unaware. A reliable mailing setup is part of staying compliant, not just a convenience.
Where Your US Address Fits the Whole Process
Address questions run through every stage of this filing, and they are where foreign owners most often get stuck because they have no US home address to use.
- Getting the EIN: the SS-4 application asks for the entity's address, and a professional US business address can stand in for a home you do not have.
- On the forms: the pro forma 1120 and Form 5472 carry the LLC's mailing address, which should be one you control and monitor.
- Receiving IRS mail: notices, including any penalty notice, are mailed to that address, so it has to forward reliably to you abroad.
- The registered agent slot: that is a separate state-level role, and where a provider offers registered agent service, it keeps your home off the public record.
Because save office maintains business addresses across seven cities in the United States, a non-resident owner can keep a consistent US mailing address for the EIN application, the forms, and any IRS correspondence, and have that mail forwarded rather than lost. You can sanity-check any address you plan to use with our free Address Checker, then set up mail handling through save office onboarding.
Form 5472 is reporting, not your tax bill
Whether you owe any US income tax is a separate question that depends on your activities and any treaty, and you should confirm it with a cross-border CPA. To keep the related foreign-owner forms straight, see our guide on W-8BEN-E vs W-9 for foreign-owned LLCs.
Deadlines and Extensions
For a calendar-year filer, the package is generally due April 15 of the following year. You can request an automatic six-month extension by filing Form 7004 by that regular due date, which moves the deadline to October 15.
- File Form 7004 by the original due date to get the extension; it does not file itself automatically.
- An extension to file is not an extension to resolve any tax you might separately owe.
- If you lost the EIN assignment letter, you can request a replacement before the deadline so the filing is not held up. See our guide on the EIN 147C letter.
Form 5472 catches many foreign founders off guard because a single-member LLC usually files nothing of its own. The rule since 2017 changes that whenever the LLC is foreign-owned, disregarded, and has even basic money movement with its owner.
Treat the filing as a fixed annual habit: keep an EIN, keep a US mailing address you actually monitor, send Form 5472 and the pro forma 1120 together by the deadline, and confirm the current IRS mailing details and your own tax position with a qualified professional. The form is mostly procedure, and the $25,000 risk is almost entirely avoidable.
Frequently Asked Questions
