A founder in Lagos forms a Wyoming LLC to sell software to US customers. He reads that a single-member LLC is "disregarded" and assumes there is no US tax or paperwork to consider. That is a costly assumption. Disregarded status generally puts income-tax obligations at the owner level; it does not make the income tax-free. A foreign-owned disregarded LLC must also file Form 5472 with a pro forma Form 1120 for a year with a reportable transaction, even if it earned nothing. Missing a required filing can trigger a $25,000 penalty.
The owner may owe US income tax, including on income effectively connected with a US trade or business. The answer depends on the business activity and the owner's tax situation. Form 5472 is a separate information-reporting obligation. This guide covers its trigger, deadline, penalty, and filing options.
Disregarded for income tax does not mean invisible
A US single-member LLC owned by one foreign person is generally a disregarded entity unless it elects corporate taxation, 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.
Who has to file
For the disregarded-entity filing described here, you file if your US LLC has a single foreign owner and had a reportable transaction during the year. With no reportable transactions, this filing is not required. The trigger is the reportable transaction, not profit.
Funding, withdrawals and owner loans can trigger filing. Dealings with other related people or businesses can count too. Check the IRS definitions before deciding there was nothing to report. For an individual owner, foreign status depends on US citizenship and tax residency, not simply living abroad.
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. A US C-corp with a 25-percent foreign shareholder may also need Form 5472 for reportable transactions, attached to its regular corporate return. This guide is about the common case: the foreign-owned single-member LLC.
The filing at a glance
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? | No for a foreign-owned disregarded entity; mail or fax it to the IRS |
The deadline
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 penalty is $25,000, and it grows
The base penalty is $25,000 for failing to file on time, filing a substantially 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 or part of one 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.
Why you probably should not file this one yourself
You can apply for an EIN directly with the IRS for free. Form 5472 requires more care. A foreign-owned disregarded entity must mail or fax it with the pro forma 1120 using the IRS's special filing instructions, including the "Foreign-owned U.S. DE" label. A late or improperly submitted filing can trigger the penalty; the IRS also treats a substantially incomplete Form 5472 as a failure to file. Check the current instructions before submitting.
If you are unsure which transactions to report or how to prepare the forms, a US CPA or enrolled agent experienced with foreign-owned LLCs can help. A packaged filing service is another option; confirm which returns and support its price includes.
Have it filed for you: Firstbase
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.
Common questions
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. Transactions with other related parties can also trigger filing.
What counts as a reportable transaction? Owner funding, withdrawals and loans are common examples. Other dealings with related parties can count; use the IRS definitions rather than checking only owner transfers.
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? 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. Penalty relief depends on the facts and is not automatic. This is a case to get professional help rather than guess.
Bottom line
A foreign-owned single-member US LLC that is disregarded for income tax still files Form 5472 for years with reportable transactions, including years with no income. The penalty for missing a required filing starts at $25,000. Disregarded status does not exempt the owner from US income tax.
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.
Deciding how to set the whole thing up?
See the done-for-you versus build-it-lean breakdown, including who files the 5472 and what it all costs.
Sources, research & corrections
Sources: IRS Instructions for Form 5472, single-member LLC tax classification, and effectively connected income. These distinguish the LLC's information return from the owner's income-tax obligations. Reviewed September 26, 2026.
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.