Most of what goes wrong for foreign-owned LLCs is not tax. It is a form nobody mentioned, with a penalty that starts at $25,000 and does not care that the company earned nothing.
Who has to file
Since 2017, a US LLC that is wholly owned by a foreign person and treated as a disregarded entity is treated as a corporation for this specific reporting purpose. That means it must file Form 5472, attached to a pro-forma Form 1120, if it had any reportable transaction during the year.
In plain terms: single foreign owner, US LLC, no corporate tax election, and money moved. That describes the majority of the companies this guide is written for.
What counts as a reportable transaction
This is where the misunderstanding lives. A reportable transaction is not limited to sales or profit. It includes essentially any monetary transaction between the LLC and its foreign owner or a related party:
- Capital you contributed to start or fund the company.
- Money you withdrew — owner draws, distributions.
- Loans either direction between you and the LLC.
- Payments to a related entity you also own.
- Amounts paid on the company's behalf from your personal funds.
If you funded the company at all — and you had to, to pay the filing fee — you almost certainly have a reportable transaction in your first year.
The penalty
Failure to file a complete and correct Form 5472 on time carries a penalty of $25,000 per form, per year. Continued failure after IRS notice adds further $25,000 increments.
Two things make this worse than it sounds. It is not proportional to revenue, so a dormant company faces the same figure as a profitable one. And it applies to a form many founders have never heard of, which is precisely why it catches people.
Reasonable-cause relief exists and is sometimes granted for a first, promptly corrected failure — but it is a request, not an entitlement.
What the filing consists of
A disregarded LLC does not file a normal corporate return. You submit:
- A pro-forma Form 1120 with only identifying details completed — name, address, EIN — not a full tax computation.
- Form 5472 attached, describing the related party (you) and the reportable transactions.
It is filed by fax or post to a specific IRS address for these returns. It cannot be e-filed as a standalone disregarded-entity submission, which surprises people expecting a modern process.
Information you will need
- The LLC's legal name, EIN and address.
- Your full name, address and country of residence and citizenship.
- Your foreign taxpayer identification number, if your country issues one.
- The amounts of each category of reportable transaction for the year.
This is why bookkeeping matters from day one. Reconstructing a year of transfers between you and the company at filing time is where errors get introduced.
When it is due
The same deadline as the corporate return it attaches to: generally 15 April for a calendar-year company, extendable by six months to 15 October with a timely Form 7004.
The extension moves the filing deadline, not any payment obligation. For most disregarded LLCs with no US tax due, there is nothing to pay — the extension simply buys time on the paperwork.
What else you may owe
Form 5472 is federal and specific to foreign ownership. It sits alongside, not instead of:
- Your state's annual report and fee — a separate obligation with its own deadline. See the state comparison.
- Beneficial ownership reporting, where it applies to your entity.
- Sales tax, if you sell physical goods into US states where you have economic nexus.
- Your home country's rules. A US company owned by a resident of another country frequently creates obligations there too — often the more consequential set.
If you have already missed it
Do not wait for a notice. The usual path is to file the late return with a reasonable-cause statement explaining why it was missed and what you have changed. Voluntary correction before the IRS contacts you is viewed differently from correction after.
This is the point to involve a CPA who works with foreign-owned entities. The filing itself is short; the reasonable-cause statement is where experience matters.
Three habits that prevent this entirely
- Log every transfer between you and the company as it happens, with date, amount and direction. A spreadsheet is enough.
- Put 15 April and 15 October in your calendar with a reminder a month before each.
- Keep the accounts genuinely separate, which makes the transfer log accurate by construction. This is the same discipline that protects your liability position.
Whether you also owe US income tax is a different question with a different answer: see do non-resident LLC owners owe US tax.