Foreign-Owned Single-Member LLC: US Tax Requirements
If you are a non-US founder with a US LLC, the entity itself rarely pays federal tax, but you almost certainly have a filing obligation anyway. Here is what actually applies.
What 'disregarded entity' actually means
A single-member LLC owned by one person, US or foreign, is not taxed as its own entity by default. The IRS treats it as a 'disregarded entity,' meaning the LLC's activity is reported as if it happened directly on the owner's tax return, unless you file Form 8832 to elect corporate taxation instead (most founders do not).
For a foreign owner, this creates a common misunderstanding. People assume that because the LLC is disregarded, there is nothing to file with the IRS. That was true before 2017. It is not true now.
The ECI test: do you actually owe US tax?
Whether you owe US federal income tax depends on a separate question from whether you have to file paperwork. The test is Effectively Connected Income, usually shortened to ECI.
Broadly, income is ECI if it comes from a US trade or business, meaning you (or a dependent agent, or employees) are regularly and substantially conducting business activity inside the United States. Selling digital products, running SaaS, invoicing international clients, or dropshipping from overseas suppliers, with no US office, no US employees, and no one in the US regularly negotiating or closing contracts on your behalf, generally does not create a US trade or business. In that case there is typically no ECI and no federal income tax due on that income.
Things that tend to push you into ECI territory include having a physical US office or warehouse, US-based employees or contractors performing core business functions, or an agent in the US who habitually signs contracts for you. If any of that applies, get a US accountant to review your facts specifically, since the test is fact-dependent and the consequences of getting it wrong are real.
The key point: no ECI does not mean no filing obligation. That is where Form 5472 comes in.
Form 5472 and the pro-forma 1120: the filing that matters even at $0 revenue
Since 2017, a foreign-owned single-member LLC (a disregarded entity) is treated, solely for reporting purposes, as if it were a domestic corporation. That means it must file Form 5472 every year, attached to a pro-forma Form 1120, reporting 'reportable transactions' between the LLC and its foreign owner or other related parties.
Reportable transactions include things founders often overlook: capital contributions you made to fund the LLC, funds you moved between your personal account and the business account, payments the LLC made to you, and loans in either direction. Even a business that made zero sales all year usually has at least one of these, so the filing is required almost universally, not just when there is taxable income.
- The pro-forma 1120 is largely a cover sheet. It does not calculate tax on its own; it exists to give Form 5472 something to attach to.
- Deadline is the same as a corporation's: April 15 for calendar-year filers, with a possible extension to October 15 using Form 7004.
- You need an EIN before you can file. Non-residents apply using Form SS-4 by fax or mail (the online EIN application requires a US SSN or ITIN, so most founders go through fax or mail, or use a service that handles this).
- The penalty for failing to file, or for filing incomplete or inaccurate information, is $25,000 per year, with additional monthly penalties if it continues after an IRS notice.
Form 5472 is an information return. It reports transactions, it does not by itself determine whether you owe tax. Whether you owe tax is the ECI question above.
Do you need an ITIN?
Not automatically. Your LLC operates using its EIN, and Form 5472 can list the foreign owner's identifying number as a foreign tax ID if you don't have a US ITIN or SSN. An ITIN becomes necessary when you personally need to file a US return, for example if you have ECI, want to claim a tax treaty benefit, or need to file Form 1040-NR for another reason. An ITIN does not require a US visa, it is specifically for people who need to interact with the IRS but are not eligible for a Social Security Number.
State considerations: it is not just the IRS
Your LLC's home state has its own annual requirements, separate from federal filing. These are usually cheap and simple compared to the federal side, but missing them can lead to administrative dissolution of the LLC.
| State | Typical annual cost | Notes |
|---|---|---|
| Wyoming | Low flat annual report fee | No state income tax, no franchise tax, common low-cost default for founders with no US-based assets |
| Delaware | Flat annual franchise tax | Preferred by some investors and for entities expecting to raise US venture funding later |
| Other states | Varies widely | Only relevant if you have physical presence, employees, or specific customer concentration there |
Separately, if you sell physical goods or certain services, you may trigger state sales tax economic nexus once you cross a state's revenue or transaction threshold, regardless of income tax status. That is a different system from income tax and worth checking once you have meaningful US sales.
A realistic annual checklist
- Keep a registered agent active in your formation state.
- File your state annual report on time.
- Track every transfer between you and the LLC during the year (capital in, distributions out, any loans).
- File Form 5472 with the pro-forma 1120 by the deadline, extending with Form 7004 if needed.
- Confirm annually whether your activity has crossed into US trade or business territory, since growth can change your ECI position.
This is the part of running a US LLC that trips up non-US founders most often, not because it is complicated in principle, but because it is easy to assume 'no US income means no US paperwork.' Founders Credit sets up the LLC, EIN, ITIN, and US business banking end to end for European founders, and connects you with US accountants for the actual annual 5472 and state filings, so nothing quietly turns into a $25,000 problem.
Quick glossary
Disregarded entity: a single-member LLC not taxed separately from its owner, unless it elects corporate treatment. ECI (Effectively Connected Income): income connected to a US trade or business, the test that determines if federal income tax is owed. Form 5472: an information return foreign-owned disregarded entities must file annually, reporting transactions with the owner, attached to a pro-forma Form 1120. Pro-forma 1120: a mostly-blank corporate return filed solely as a cover document for Form 5472. EIN: the federal tax ID number for the LLC itself, obtainable by non-residents via Form SS-4. ITIN: an individual taxpayer number for people not eligible for an SSN, needed for personal filings like Form 1040-NR, not for owning an LLC or filing 5472 on its own.
Frequently asked questions
If my LLC has no US customers or office, do I still owe US tax?
Usually not federal income tax, since you likely have no Effectively Connected Income without a US trade or business. But you almost certainly still owe an annual Form 5472 filing, which is a reporting requirement, not a tax bill.
What actually happens if I skip Form 5472?
The penalty is 25,000 US dollars for a missed, incomplete, or inaccurate filing, with further monthly penalties if it continues after the IRS sends a notice. This applies even in years with zero revenue, since the filing is triggered by transactions like capital contributions, not by profit.
Do I need an ITIN to form and run the LLC?
No. The LLC operates with its own EIN. An ITIN is only needed if you personally have to file a US return, for example due to Effectively Connected Income or to claim a tax treaty benefit. Form 5472 can be filed using a foreign tax ID if you don't have an ITIN.
Should I choose Wyoming or Delaware?
Wyoming is the common low-cost default for founders with no US operations, due to no state income tax and low annual fees. Delaware is favored when you expect to raise US venture funding, since investors are more familiar with its corporate law, though it carries a flat annual franchise tax.
Can Founders Credit file my taxes for me?
Founders Credit handles the LLC formation, EIN, ITIN, and US business banking and card setup, done for you and remote. For the annual Form 5472, pro-forma 1120, and any personal US filings, we connect you with US accountants who specialize in foreign-owned LLCs so the tax side is handled correctly too.
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