A founder in Lagos forms a Wyoming LLC to sell software to US customers. Every guide he read said a single-member US LLC owned by a non-resident is "disregarded" and pays no US income tax. He takes that to mean no filing. He is half right and about to be very wrong. The LLC owes no income tax, but it must file an information return, Form 5472 with a pro forma Form 1120, every year. Missing it is a $25,000 penalty.
This is the single most expensive thing non-residents do not know about a US LLC. The "tax-free" and "disregarded" language is true for income tax and false for paperwork. This guide covers who must file, what triggers it, the deadline, the penalty, and the honest options for getting it done.
A US single-member LLC owned by one foreign person is a disregarded entity, so the IRS ignores it for income tax and looks through to the owner. That is the part everyone repeats. What changed in 2017 is that the IRS now treats that same LLC as a reporting corporation for one narrow purpose: Form 5472. The reason was visibility. Foreign-owned LLCs were a blind spot, so Treasury closed it.
The result is a filing obligation that exists even when the LLC earned zero income and owes zero tax. The form does not calculate tax. It reports who owns the company and what money moved between the owner and the company. It is disclosure, not a tax bill.
You file if your US LLC has a single foreign owner and had a reportable transaction during the year. The trigger is the reportable transaction, not profit.
A reportable transaction is money or property moving between you and the LLC. Capital you put in to start it, distributions you take out, loans either direction, and payments the LLC makes to you all count. Forming and funding the company is itself a reportable transaction. So in practice almost every foreign-owned single-member LLC owes a Form 5472 from its first year, including the year it made no sales.
Two points that trip people up. A multi-member LLC taxed as a partnership does not file Form 5472 this way, it files a partnership return instead. And a US C-corp that is 25 percent or more foreign owned files Form 5472 too, but as part of its regular corporate return, not as a pro forma attachment. This guide is about the common case: the foreign-owned single-member LLC.
The core facts for a foreign-owned single-member LLC. Verified 2026 against the IRS Form 5472 instructions.
| Item | Detail |
|---|---|
| What you file | Form 5472 attached to a pro forma Form 1120 |
| Who files | Foreign-owned single-member US LLC with a reportable transaction |
| Even with no income? | Yes, if any reportable transaction occurred |
| Deadline | April 15 for a calendar-year LLC, extendable to October 15 with Form 7004 |
| Penalty for missing it | $25,000 per form, per year |
| EIN required first | Yes |
| Can it be e-filed? | Generally no, it is mailed or faxed to the IRS |
Form 5472 is due when the pro forma Form 1120 is due, which for a calendar-year LLC is April 15. You can extend to October 15 by filing Form 7004 by the original deadline. The extension moves the filing date, it does not remove the obligation. If you formed the LLC partway through a year and funded it, the clock started that year.
The base penalty is $25,000 for failing to file on time, filing an incomplete form, or failing to keep the required records. That is per form and per year. If you have transactions with more than one related party, a separate Form 5472 is required for each, and each carries its own penalty.
It does not stop there. If the failure continues more than 90 days after the IRS sends a notice, an additional $25,000 applies for each 30-day period after that. There is no cap. A few years of unfiled returns discovered by the IRS can produce a penalty larger than the business is worth. This is not a form to leave for later.
You can file a free EIN yourself, and for that we tell non-residents to do exactly that. Form 5472 is different. A foreign-owned disregarded entity usually cannot e-file the pro forma 1120 the normal way, so it goes by mail or fax to a specific IRS unit in Ogden, Utah, with "Foreign-owned U.S. DE" written across the top of the 1120. The pro forma 1120 has its own quirks, and an incomplete or mislabeled filing is treated as a failure to file, which means the full $25,000 penalty for a paperwork slip.
Because the downside of a small mistake is so large, most non-residents use a US tax professional who handles foreign-owned LLCs, or a formation service that files it as a package. Any competent US CPA or enrolled agent who knows foreign-owned LLCs can do this. If you would rather have it handled inside the same account that formed your company, that is what the paid packages are for.
Firstbase files the Form 5472 and pro forma Form 1120 for a foreign-owned single-member LLC as a tax package at $899 per year, including the extension if needed. It is the one filing where paying to get it right is usually the better call.
See the Firstbase tax filing package ↗Filing it through a service is convenience, not the only path. If you already work with a US accountant, ask whether they handle foreign-owned single-member LLCs before assuming they do, because many do not.
My LLC made no money. Do I still file? Yes, if there was a reportable transaction, and funding the company to start it usually counts. The obligation is tied to transactions with you as the owner, not to income.
What counts as a reportable transaction? Money or property moving between you and the LLC. Startup capital, distributions, loans in either direction, and payments the LLC makes to you or to a related party.
Does a tax treaty get me out of it? No. Form 5472 is an information return. It is required regardless of any treaty and regardless of whether you owe tax.
Do I need an EIN before I can file? Yes. The LLC must have an EIN. A non-resident with no SSN can get one free from the IRS on Form SS-4, covered in our non-resident LLC guide.
Can I e-file it? Generally no for a foreign-owned disregarded entity. It is submitted by mail or fax to the IRS with the pro forma Form 1120.
What if I already missed a year? File the late return as soon as possible, ideally before the IRS contacts you, and a tax professional can prepare a reasonable-cause statement. Acting before an IRS notice improves the chance of relief. This is a case to get professional help rather than guess.
A foreign-owned single-member US LLC is disregarded for income tax and fully on the hook for Form 5472. The filing is annual, it applies even with no income, and the penalty for missing it starts at $25,000. The "tax-free LLC" pitch is true for your tax bill and dangerous if you read it as no paperwork.
Get the EIN yourself for free, keep the registered agent and address lean, and spend on the one filing where a mistake is expensive. Whether you use your own accountant or a packaged service, the goal is the same: file it, on time, complete.
See the done-for-you versus build-it-lean breakdown, including who files the 5472 and what it all costs.
This guide summarizes the federal Form 5472 filing requirement as of 2026 and is not legal or tax advice. It does not cover your personal tax situation or the tax rules of your home country. Confirm your obligations with a qualified US tax professional before filing. Some links on this page are affiliate links.