Why the IRS Requires Form 5472 for Foreign-Owned LLCs: Pro Forma 1120 Explained

The Purpose of Form 5472

The IRS requires Form 5472 to track transactions between foreign-owned U.S. entities and their foreign owners. This is an information return — it does not calculate any tax liability. The purpose is transparency: the IRS wants to know what money is flowing between U.S. entities and their foreign related parties.

What "Pro Forma" Means for Form 1120

When used alongside Form 5472, the Form 1120 is filed as a pro forma return. The term "pro forma" means the form is not being used to report full corporate tax activity, but rather to satisfy a structural requirement. Basic entity information such as name and address is required, but income and tax sections are usually left blank or show zero values.

The main purpose of the pro forma 1120 is to provide a filing framework — essentially a cover page — to which Form 5472 is attached.

How to File

The pro forma Form 1120 and attached Form 5472 must be filed by the 15th day of the 4th month after the end of the LLC's tax year (typically April 15 for calendar-year LLCs). The forms cannot be e-filed for disregarded entities — they must be mailed or faxed to the IRS. Include all required information on both forms and retain copies for your records.