Form 5472: what foreign-owned U.S. LLCs actually have to file.

Form 5472 is one of the more expensive filings to miss. If a foreign person owns 25 percent or more of a U.S. corporation — or a U.S. LLC treated as a corporation, or a foreign-owned single-member U.S. LLC — that entity has to file the form annually, alongside a bare-bones Form 1120. The penalty for not filing is $25,000. Per year. Per form.

Most owners find out about it two or three years in, usually from an accountant they’ve just hired or an IRS notice. This walks through who files, what counts as a reportable transaction, when it’s due, and the specific things people get wrong.

Who has to file

Three categories of entity trigger a Form 5472:

• A U.S. corporation where a foreign person or entity owns 25 percent or more of the voting power or value.
• A foreign corporation engaged in a U.S. trade or business.
• A foreign-owned single-member U.S. LLC — the trap most people hit.

The single-member LLC case is the one that catches owners off guard. A foreign investor sets up a Delaware LLC as their U.S. holding entity, elects nothing, and treats it as a pass-through. Since 2016 the IRS has treated that LLC as a corporation for the limited purpose of Form 5472 reporting. It doesn’t pay corporate tax; it just has to file the disclosure return. Miss it and the penalty stands.

What counts as a “reportable transaction”

Any money that moves between the entity and its foreign owner or a related party. That includes obvious things — loans, sales, rent, royalties, service fees — and less obvious things:

• Capital contributions from the owner to the entity
• Distributions from the entity to the owner
• Reimbursements of expenses in either direction
• The formation of the entity itself (initial capitalization is a reportable transaction)

If in a given year nothing moved between the entity and the owner, and there were no formation events, no filing is required. In practice this is rare — even a routine expense reimbursement is enough to trigger the requirement.

Deadline and penalty

Form 5472 is filed with Form 1120 (for the corporation) or a pro-forma 1120 (for the foreign-owned single-member LLC). Due date is April 15 for calendar-year entities, with an extension available to October 15. Miss the deadline and the penalty is a flat $25,000 — not a percentage of tax owed, because there usually isn’t any tax owed. The penalty applies whether the filing is one day late or three years late.

What people get wrong

Three recurring mistakes:

1. Treating a single-member LLC as if it were exempt. The pass-through nature is a domestic-tax concept; the 5472 disclosure requirement is independent of it.
2. Not filing in the year the LLC was formed. The initial capitalization is itself a reportable transaction, and the first-year return is often skipped by owners who assume “no operating transactions” means “no filing.”
3. Missing related-party transactions with the owner’s foreign business. If the owner has other companies abroad, transactions between the U.S. LLC and those companies are reportable, not just transactions between the U.S. LLC and the owner personally.

What to do if you’ve missed one

Late filings are still filings. The penalty is $25,000 per year per form, but voluntary late filings with a reasonable-cause statement have a better track record with the IRS than filings prompted by a notice. If you’re several years behind, file all the outstanding years at once with a single reasonable-cause statement covering the whole period — the IRS treats that more favorably than a drip of one-year filings.

None of the Form 5472 rules are new, but the awareness of them among non-U.S. owners is still catching up to the enforcement. If you or a client set up a U.S. entity and there’s any foreign ownership on the cap table, the safest assumption is that the form is required and the second-safest assumption is that it hasn’t been filed.