The $25,000 tax form most non-resident founders don't know they have to file. What Form 5472 is, who owes it, what happens if you miss it, and how to actually get it done.
If you're a non-resident who owns a US LLC, there's a good chance you need to file Form 5472 this year. If you don't know what that is, this post is for you. Missing it is a $25,000 penalty. The form itself is not hard once you know what it's asking for.
Since 2017, a single-member LLC owned by a non-US person is treated as a reporting corporation for federal tax purposes — even though the LLC itself is a disregarded entity and pays no US income tax.
The mechanism: you file a pro-forma Form 1120 (US corporate tax return) with a Form 5472 attached, disclosing the "reportable transactions" between you and the LLC.
This applies to most non-resident founders who formed a Wyoming, Delaware, or Florida LLC on their own. It was introduced by the IRS specifically to close an information-gap loophole where foreign-owned US LLCs were invisible to the tax system.
You owe a Form 5472 filing if all three are true:
"Reportable transaction" is broader than most founders expect. It includes:
In practice, if you formed the LLC and did anything with it, you have a reportable transaction. Even dormant LLCs sometimes do — if you paid the state filing fee personally and then reimbursed yourself from a business account, that's a transaction.
The extension is free and automatic — there's no downside to filing it. Missing the extension filing deadline, however, means you're immediately late.
The filing package:
Form 1120 — federal US corporate tax return. You fill in your LLC name, EIN, address, and tax year. Everywhere else writes $0 or N/A. You tick the box indicating the return is being filed solely to satisfy Form 5472 requirements.
Form 5472 — the actual information return. Disclosures include:
Attachment — supporting schedule when the transactions need clarification.
The pro-forma 1120 + 5472 is mail-only or fax-only. It cannot be e-filed. The IRS address depends on your entity's principal place of business — most non-residents' LLCs have none, so you mail it to the Ogden, Utah service center.
Mail the package with tracking. Keep proof of mailing. Expect no acknowledgement from the IRS.
Failure to file Form 5472, or filing it incompletely, triggers a $25,000 penalty per year. Additional $25,000 penalties accrue in 90-day increments if the IRS notifies you and you still don't respond.
The penalty has been assessed. It is not theoretical.
The penalty also applies if you file, but the filing is materially incomplete or misleading. The form requires you to aggregate transactions by category and disclose the correct foreign owner — not a nominee.
The Tax Agent drafts the full pro-forma 1120 + Form 5472 package from your live bookkeeping data and your entity profile. Every reportable transaction is categorized during the year by the Bookkeeping Agent, so by filing time you have a structured list of what to disclose. A partner CPA reviews and signs before mailing.
Alongside the 5472, the Compliance Agent also calendars:
Non-residents miss all three of these constantly. FormBridge is built to make that impossible.
The pro-forma 1120 + 5472 is not a substitute for your personal US tax return. If you have US-source income personally (not through the LLC), you may still owe a 1040-NR. The 5472 is about your ownership of the LLC; the 1040-NR is about your personal US activity. They are separate filings.
For most non-resident founders running a foreign-market business through a US LLC, only the 1120 + 5472 applies. But confirm with a tax advisor — FormBridge's Tax Agent flags the cases where a 1040-NR is also in play.
If you formed your LLC in 2022 or 2023 and never filed, you're not alone. The options:
Talk to a CPA who handles non-resident filings before the next April 15. Don't freeze.