A single-member LLC is an LLC with one owner. At the state level, that owner has limited liability, the same as any LLC. At the federal tax level, the LLC does not exist by default. The IRS looks through it and taxes the owner directly. That default is called being a "disregarded entity."
Most guides stop there and call it good news: no separate business tax return, no corporate tax rate, simpler bookkeeping. For a U.S. person, that is accurate. For a foreign owner, the same disregarded status carries a filing duty that has nothing to do with income tax and a penalty that starts at $25,000. Both facts are true at the same time. Which one applies to you depends on who owns the LLC, not on how much money it made.
What the rule actually says
The default classification comes from 26 CFR §301.7701-3(b)(1)(ii). A domestic LLC with a single owner is, unless it files Form 8832 to elect corporate treatment, "disregarded as an entity separate from its owner" for federal tax purposes. The LLC's income, deductions, and credits go straight onto the owner's own return. If the owner is an individual, that return is a Form 1040 or a Form 1040-NR. If the owner is a corporation, the LLC's activity folds into that corporation's return.
This disregard is not total. The IRS treats a single-member LLC as a separate entity for employment tax and for certain excise tax purposes, even though it is disregarded for income tax. So an SMLLC with employees still files employment tax returns under its own EIN. Disregarded means disregarded for income tax. It does not mean invisible to every part of the tax code.
The part that changes everything for foreign owners is 26 CFR §301.7701-2(c)(2)(vi). It says that for purposes of the reporting requirements under Internal Revenue Code §6038A, a domestic disregarded entity that is wholly owned, directly or indirectly, by one foreign person is treated as if it were a domestic corporation separate from its owner. The regulation carves out this one purpose and reclassifies the LLC for it, while leaving the income tax treatment disregarded everywhere else.
That single carve-out is why a foreign-owned single-member LLC has to file paperwork that a U.S.-owned single-member LLC never sees.
🇺🇸 If the IRS counts you as a U.S. person
You report the LLC's income and expenses on your own Form 1040, usually on Schedule C, E, or F depending on what the business does. There is no separate federal income tax return for the LLC itself, and there is no Form 5472 requirement. If the LLC has no employees and does not owe excise tax, the LLC itself files nothing at the federal level in a typical year.
If you want the LLC taxed as a corporation instead, you can file Form 8832 and elect that treatment, or file Form 2553 to elect S-corporation status if the LLC qualifies. That is a choice you make. The default asks nothing extra of you.
🌏 If it does not
The income tax treatment is the same as above: the LLC is still disregarded, and its income is still reported on your personal return (Form 1040-NR, to the extent the income is connected to the United States).
The filing duty is different. Because you are a foreign person who wholly owns a domestic disregarded entity, §301.7701-2(c)(2)(vi) reclassifies the LLC as a corporation for §6038A reporting. In practice that means:
- You file Form 5472 for any year in which the LLC had a reportable transaction with a related party, including you as its owner. For a foreign-owned disregarded entity the reportable list is wide: 26 CFR §1.6038A-2(b)(3) covers amounts paid or received in connection with the formation, dissolution, acquisition, and disposition of the entity, including contributions to and distributions from it, on top of the usual sales, loans, and payments.
- Form 5472 is attached to a pro forma Form 1120. The 1120 is not a real corporate tax return in this case. It exists only to carry the Form 5472 attachment.
- The filing goes in by fax or by mail. The Form 5472 instructions state that a foreign-owned U.S. disregarded entity cannot file Form 5472 electronically.
- The trigger is the transaction, not the money. The requirement applies even if the LLC had zero U.S. tax liability for the year, including an LLC with no U.S.-source income at all.
There is a narrow exception, and it is narrower than it sounds. Under 26 CFR §1.6038A-2(e)(1), a reporting corporation does not have to file Form 5472 for a year in which it had no reportable transactions of any listed type with any related party. Because funding the LLC, taking money out of it, and paying its formation costs all count, a year with genuinely zero reportable transactions is uncommon. Treat the filing as the default and the exception as something you confirm, not something you assume.
The penalty is $25,000 for each taxable year in which the LLC fails to file, or files without complete and accurate information (26 U.S.C. §6038A(d)(1)). Three missed years is three penalties. If the IRS sends a notice and 90 days pass without a correct filing, the penalty increases by another $25,000 for each additional 30-day period, or fraction of one.
What is the same either way
| 🇺🇸 U.S. person owner | 🌏 Foreign owner | |
|---|---|---|
| Default classification | Disregarded entity | Disregarded entity |
| Where LLC income lands | Owner's Form 1040 | Owner's Form 1040-NR |
| Federal income tax return for the LLC itself | None | None (still disregarded for income tax) |
| Form 5472 + pro forma Form 1120 | Not required | Required for any year with a reportable transaction, even with zero U.S. tax owed |
| Penalty for missing Form 5472 | Not applicable | $25,000 per taxable year, plus $25,000 per 30-day period after a 90-day IRS notice |
| Employment tax, if the LLC has employees | LLC files under its own EIN | Same rule applies |
| Can elect corporate tax treatment instead | Yes, via Form 8832 | Yes, via Form 8832 |
The default tax classification is identical for both owners. The gap opens entirely at the §6038A reporting layer, which reaches a disregarded single-member LLC only when its sole owner is a foreign person.
Common mistakes
🇺🇸 If the IRS counts you as a U.S. person
- Getting the EIN rule backwards. The IRS says a disregarded single-member LLC with no employees and no excise tax liability does not need its own EIN and should use the owner's name and TIN for federal tax purposes. Add employees or an excise tax liability and it does need one.
- Forgetting that disregarded status is only about federal income tax. State tax rules for a single-member LLC vary and are not covered by this classification.
🌏 If it does not
- Reading "disregarded entity" and concluding no federal filing is required at all. The income tax treatment and the §6038A reporting requirement are two separate rules, and the second one applies specifically because the owner is foreign.
- Trying to e-file Form 5472. A foreign-owned U.S. disregarded entity cannot. It goes in by fax or by mail, attached to the pro forma Form 1120.
- Skipping the filing in a year the LLC had no U.S. income and no U.S. tax due. The requirement is not tied to how much tax was owed. It is tied to whether the LLC had a reportable transaction, and putting money in or taking money out is one.
- Assuming a dormant year is automatically exempt. The no-reportable-transaction exception in 26 CFR §1.6038A-2(e)(1) is real, but it means no transactions at all with any related party, not just no revenue.
- Waiting for an IRS notice before fixing a missed year. The $25,000 runs per taxable year, and once 90 days pass after that notice it starts adding another $25,000 every 30 days.
FAQ
Does a single-member LLC file its own federal tax return?
Not by default. A domestic LLC with one owner is disregarded for federal income tax under 26 CFR §301.7701-3(b)(1)(ii), so its income and expenses are reported on the owner's own return instead of a separate LLC return.
If my single-member LLC is disregarded, why do I have to file anything?
Disregarded status covers income tax. It does not cover the separate reporting requirement under Internal Revenue Code §6038A. If your LLC is wholly owned by one foreign person, 26 CFR §301.7701-2(c)(2)(vi) treats it as a corporation specifically for that reporting requirement, which is where Form 5472 comes from.
Do I still have to file Form 5472 if my LLC made no money?
Usually yes. The requirement does not depend on income or on how much U.S. tax the LLC owes. It depends on whether the LLC had a reportable transaction with a related party during the year, and money you put into the LLC or take out of it counts as one. A year with no revenue but a capital contribution is still a filing year. Only a year with no reportable transactions at all falls under the exception in 26 CFR §1.6038A-2(e)(1).
Can I file Form 5472 electronically?
No. The Form 5472 instructions state that a foreign-owned U.S. disregarded entity cannot file Form 5472 electronically. It goes in by fax or by mail, attached to a pro forma Form 1120.
What is the penalty for not filing Form 5472?
$25,000 for each taxable year in which the LLC fails to file, or files with incomplete or inaccurate information (26 U.S.C. §6038A(d)(1)). If the IRS sends a notice and 90 days pass without a correct filing, the penalty adds another $25,000 for each additional 30-day period, or fraction of one, that the failure continues.
Is a single-member LLC disregarded for every kind of tax?
No. It is disregarded for federal income tax. The IRS treats it as a separate entity for employment tax purposes and for some excise taxes, and, if the sole owner is a foreign person, as a corporation for §6038A reporting purposes.
Can I change my single-member LLC out of disregarded status?
Yes. Filing Form 8832 lets you elect to have the LLC taxed as a corporation instead of accepting the default disregarded classification. A single-member LLC can also elect S-corporation status with Form 2553 if it otherwise qualifies, though a foreign owner who is a nonresident alien cannot use that election.
Does owning a single-member LLC by itself make me a U.S. person for tax purposes?
No. Ownership of a U.S. LLC does not change your own tax residency. You can own a U.S. single-member LLC as a nonresident alien and remain a nonresident alien. Note that the two questions do connect at one point: the §6038A reporting duty exists precisely because the sole owner is a foreign person, so your status determines whether the duty applies, even though owning the LLC does not determine your status.