IRS forms
Forms 1120, 5472, and 7004, how they work together
Last reviewed: April 2026 · IRS sources verified at review date.
Foreign-owned US LLCs deal with three IRS forms: Form 5472 is the main information return, it is always attached to a pro forma Form 1120, and Form 7004 is the extension request that buys extra time for both.
Form 5472
Information Return of a 25% Foreign-Owned U.S. Corporation
Reports the identity of foreign owners and the details of reportable transactions between the LLC and those owners. This is the information return itself, the form most foreign-owned LLCs owe every year.
Due date
April 15 (or October 15 with Form 7004 extension)
Filed with
Pro forma Form 1120
Pro Forma Form 1120
U.S. Corporation Income Tax Return (pro forma)
Form 5472 cannot be filed alone, it must be attached to a pro forma (placeholder) Form 1120. For foreign-owned single-member LLCs that owe no tax, this 1120 is a shell return: it has minimal information and is filed solely to carry the 5472 attachment.
Due date
Same as Form 5472 (April 15 or October 15)
Filed with
Form 5472 (as attachment)
Form 7004
Application for Automatic Extension of Time to File Certain Business Income Tax Returns
Extends the deadline for Form 1120 (and therefore Form 5472) from April 15 to October 15. The extension is automatic, you do not need IRS approval. Form 7004 must be filed by the original April 15 deadline to be valid.
Due date
Must be filed by April 15 to extend the Form 5472 deadline
Filed with
Filed separately (standalone extension request)
File all three in one place
Fylit.tax handles Form 5472, the pro forma 1120, and Form 7004 extension, so you don't have to coordinate three separate filings.
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