2026 Filing Guide · Pillar
2026 Form 5472 Filing Guide for Foreign-Owned US LLCs
Last reviewed: May 2026 · IRS sources verified at review date.
If you own a US single-member LLC as a non-US person and your LLC exchanged money, property, or services with you or a related foreign party during the tax year, you are almost certainly required to file IRS Form 5472. The form is due April 15 (or October 15 with an approved extension). Missing it triggers a $25,000 penalty per form per year under IRC §6038A(d), with no statutory cap on continuation penalties.
This guide covers every part of the filing obligation: what the form is, who must file, what transactions to report, how the 2026 deadline works, and what the penalties look like in practice.
What is IRS Form 5472?
Form 5472 is an information return, not a tax payment form. Its job is to give the IRS visibility into transactions between a reporting corporation (your LLC, treated as a corporation for this purpose) and its related foreign parties. The IRS uses it to verify that related-party transactions are priced at arm's length and fully disclosed.
For a foreign-owned single-member LLC that is a disregarded entity for US tax purposes, the LLC is required to be treated as a corporation solely for the purpose of this information return. That is why it files a pro forma Form 1120 as a cover sheet, even though it pays no corporate tax.
Who must file Form 5472?
The obligation applies to any 25%-foreign-owned US corporation that engaged in a reportable transaction with a related party. For single-member LLCs, this means:
- The LLC is formed in any US state.
- The sole member is a non-US person (non-citizen, no green card, no substantial presence).
- The LLC has not elected out of disregarded entity status (no Form 8832 or 2553 election).
- At least one reportable transaction occurred between the LLC and the owner, or between the LLC and another related foreign entity, during the tax year.
Even if the LLC had zero income, a filing obligation can still exist if the owner deposited money into the LLC or the LLC made payments back to the owner.
What transactions are reportable on Form 5472?
IRS Reg. 1.6038A-2(b)(3) defines reportable transactions as any exchange of value between the reporting corporation and a related party. Common examples:
| Transaction type | Reported on |
|---|---|
| Owner deposits money into LLC | 5472 Part IV |
| LLC distributes money back to owner | 5472 Part IV |
| LLC pays owner for services | 5472 Part IV |
| Loans between owner and LLC | 5472 Part IV |
| Import of goods from related foreign company | 5472 Part IV |
| Royalties or IP licensing fees paid to foreign party | 5472 Part IV |
Non-cash property transfers (real estate, vehicles, IP) and digital asset transactions are more complex and typically require a licensed tax professional.
What is a pro forma Form 1120 and why does it matter?
A pro forma Form 1120 is a stripped-down version of the corporate income tax return. For a disregarded entity, it is filed solely as a cover sheet for Form 5472, not to report or pay corporate income tax. The IRS requires it because Form 5472 must be attached to a corporate return.
The “Foreign-owned U.S. Disregarded Entity” notation is added to the top margin of both forms to signal to IRS Ogden processing that this is an information-only filing, not a standard corporate return.
What is the 2026 filing deadline for Form 5472?
For calendar-year filers (most foreign-owned LLCs), the 2026 filing deadline for the 2025 tax year is:
Original deadline: April 15, 2026
File Form 5472 (attached to pro forma Form 1120) by this date.
Extended deadline: October 15, 2026
File Form 7004 by April 15 to receive a 6-month automatic extension. The extension only applies to the return deadline, not to any tax payment obligation.
There is no grace period for the penalty. A missed Form 5472 triggers the $25,000 penalty immediately under IRC §6038A(d). See the what happens if you miss the deadline page for a full breakdown.
What are the penalties for not filing Form 5472?
The IRS imposes a $25,000 initial penalty per Form 5472 per tax year for failure to file or failure to maintain required records (IRC §6038A(d)). After IRS notice, a continuation penalty of $25,000 per 30-day period applies with no statutory cap.
Penalties can stack: if you had multiple related parties requiring separate 5472 filings, each missed form can attract its own penalty chain. A full breakdown is on the penalties page.
How do I determine if I need to file?
The key questions are: (1) Is your LLC 25%+ foreign-owned? (2) Did any exchange of value occur between the LLC and you or a related party? (3) Is your LLC still a disregarded entity (no corporate election)?
If you are uncertain, the filing eligibility guide walks through the criteria in plain English, then routes you to the automated screener on fylit.tax for a structured check.
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