Tax & CompliancePublished Feb 3, 20278 min read
IRS Form 5472 and 1120: The Definitive Non-Resident Filing Guide (2026)
Everything you need to know about filing IRS Form 5472 and pro-forma Form 1120 for 100% foreign-owned single-member US LLCs.
Understanding the Legal Framework
Failure to file Form 5472 by April 15 carries an automated IRS penalty of $25,000, creating panic for non-resident founders. Form 5472 is purely an informational return reporting reportable transactions between the foreign owner and the US entity. No federal tax is due.
Key Takeaway
NorthBoundaries provides automated pre-filled Form 5472 and 1120 templates with step-by-step e-file/fax instructions.
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