Form 5472 Part III: Why "Principal Country" Is the Related Party's Country, Not the LLC's

Part III, Continued: Copy Information from Part II

When you're filling Part III for a single-member LLC where you're both the 25% shareholder AND the related party, the easiest approach: copy the name and address from Part II directly into Part III. Same name, same address, same U.S. ID (if any), same reference ID, same foreign TIN.

The IRS expects this consistency. Mismatches between Part II and Part III for the same person look like data-entry errors and trigger correspondence asking for clarification.

Reference ID Number — Use the Same One

If you assigned yourself a reference ID number in Part II (e.g., "WANG-LLC-25"), use the exact same number in Part III. This is the IRS's threading mechanism — they use the reference ID to confirm Part II's shareholder and Part III's related party are the same person, not two distinct foreigners.

If you used a numbering system in Part II (1, 2, 3 for multiple shareholders), keep that numbering consistent in Part III. The first shareholder in Part II becomes the first related party in Part III, and the IDs match across both.

Principal Business Activity — Same as LLC's Business

For a single-member LLC, the related party's (your) principal business activity is typically the same as the LLC's. You are a sole foreign owner whose primary business is running this LLC. Use the same NAICS-style code you used on Form 1120 (and on the LLC's own activity field).

For more complex structures (holding companies, multi-tier ownership), the related party's business activity may differ. Look it up in the Form 1120 instructions activity code table and pick what actually describes that entity's primary work.

Principal Country Where Business Is Conducted: NOT the LLC's Country

This is a frequently confused field. Part III is about the RELATED PARTY (you) and where YOUR business operates — not where the LLC operates.

If you're a Singapore resident running a Delaware LLC from Singapore: the LLC's principal country of business may be Singapore (Part I, item 1o) AND your personal principal country of business is also Singapore. They happen to match here. But if you lived in China and ran a Delaware LLC remotely while traveling, the LLC's principal country might be China (where you make decisions) and your personal country might also be China — again matching.

The key is: don't put USA here just because the LLC is U.S.-formed. Put the country where you, the related party, actually conduct your business activity.

Country Where the Related Party Files Income Tax as a Resident

Field 1i in Part III asks where the related party (you) files income tax as a resident. For a foreign individual owner, this is your personal tax residency — wherever you file your personal income tax return. China, Singapore, Japan, UK, etc.

IMPORTANT: Don't write USA here unless you're actually a U.S. tax resident (which would be unusual for a foreign owner, but possible if you have a green card or pass the substantial presence test). The default for most foreign-owned LLC owners is your home country.

The Common Mistake: Filling USA Everywhere

I've seen YouTube tutorials and online articles where the filer puts "USA" in every country field on Part III, presumably reasoning "the form is U.S., so USA goes in all the country fields." Wrong. The fields are asking about the related party, which for foreign-owned LLCs is a foreign person living in a foreign country.

For Part III, the country fields should usually reflect the related party's foreign residency. The only field where USA naturally appears in Part III is if the related party happens to be U.S.-based (uncommon — Form 5472 is about foreign related parties).

Don't Forget the Relationship Check Boxes (Multi-Check)

At the bottom of Part III is the relationship check box section: related to the reporting corporation, related to 25% foreign shareholder, 25% foreign shareholder. As covered before — these are multi-check, not single-select. Check every applicable box.

For a single-member foreign owner: definitely check "25% foreign shareholder" (you own 100%). If the legal characterization also makes you "related to the reporting corporation," check that too. The IRS prefers over-disclosure to under-disclosure on relationship characterization.

Wrapping Up Part III, Moving to Part IV

Once Part III is complete (with full info on every related party, the consistency with Part II preserved, the country fields correctly reflecting foreign residencies, and all applicable relationship boxes checked), you're done with the identification section. The next part — Part IV — is where the actual transaction amounts go.

Part IV is the most computational part of the form. It's also where the failure-to-disclose penalties most often bite, because Part IV is what the IRS uses to understand whether the cross-border money flow needs scrutiny.