Pro forma Form 1120: why a disregarded LLC still files

Disregarded does not mean invisible

"Disregarded" describes how income is attributed: the entity is not treated as separate from its owner for income tax purposes. It does not mean the entity is exempt from information reporting. Form 5472 is an information return, and information returns apply independently of whether tax is due.

What "pro forma" means here

Form 5472 must be attached to a return. For a foreign-owned disregarded LLC, that return is a pro forma Form 1120 — a Form 1120 completed only with the entity's identifying information rather than a full corporate income tax computation. It functions as the carrier for the information return.

What this does not change

• The LLC is not converted into a corporation for tax purposes.
• Filing a pro forma 1120 does not, by itself, create US corporate income tax.
• It does not settle the owner's personal position — whether the owner has US-source income or a US return obligation depends on their own facts.

Practical consequences

Because the pro forma 1120 is the filing vehicle, its due date is the Form 5472 due date: generally April 15 after a calendar tax year ends, extendable with Form 7004. The LLC also needs its own EIN to file, even with no tax liability.

Why people get this wrong

The usual reasoning is: no US customers, no US tax, therefore no US filing. The filing requirement here is driven by ownership structure and related-party transactions, not by profit. That gap is the single most common reason foreign owners discover the $25,000 penalty after the fact.