Form W-9 for a foreign-owned U.S. LLC
This is the situation where the intuitive answer is wrong. You formed a Delaware or Wyoming LLC, it is unmistakably a U.S. entity, and a U.S. client is asking for a W-9. If you are the sole member and you are not a U.S. person, the form you owe them is almost certainly a W-8.
Page 4 of the Form W-9 instructions carries a one-line caution that settles the common case: a disregarded U.S. entity that has a foreign owner must use the appropriate Form W-8. A W-9 will not do. That sentence is easy to miss and it decides most of these questions.
Why a U.S. entity ends up on a foreign form
Two rules collide here, and understanding the collision is the whole page.
The first rule is that a U.S. person includes any partnership, corporation, company or association created or organized in the United States. On its own that would make your LLC a U.S. person and a W-9 the right form. The second rule is that a single-member LLC with no tax elections is a disregarded entity: for federal income tax purposes it is not treated as separate from its owner at all. Put those together and there is no separate U.S. person left to do the certifying. The form has to describe the owner, and the owner is foreign.
This is the same logic that governs a domestically-owned single-member LLC, where the owner’s name goes on Line 1 and the owner’s SSN goes in Part I. The mechanism is identical. Only the answer changes, because following the ownership chain leads somewhere the W-9 cannot go.
Which form applies to you
| Your LLC | Treated as | Form |
|---|---|---|
| Single member, no elections, foreign owner | Disregarded. The owner is the taxpayer | Form W-8, matched to the owner. Not a W-9 |
| Single member, filed Form 8832 for C corporation treatment | A domestic corporation, a U.S. person in its own right | Form W-9, with the LLC’s EIN |
| Single member, filed Form 2553 for S corporation treatment | Generally unavailable: an S corporation cannot have a nonresident alien shareholder under IRC 1361(b)(1)(C) | Take advice before assuming this route exists |
| Two or more members, no elections | A domestic partnership, a U.S. person | Form W-9, with the LLC’s EIN. Consider Line 3b if you hold an interest in another flow-through entity |
| Two or more members, elected corporate treatment | A domestic corporation | Form W-9, with the LLC’s EIN |
Add a second member and the LLC becomes a partnership by default. A partnership organized in the United States is a U.S. person, files its own return, and completes a W-9 in its own name with its own EIN, regardless of where its partners live. One member or two changes everything here.
Which Form W-8, and what else follows
Picking the right W-8 depends on who the owner is and what kind of income is being paid, and this is the point at which a page on the internet stops being useful. In outline: a foreign individual owner generally points to Form W-8BEN, a foreign entity owner to Form W-8BEN-E, and income effectively connected with a U.S. trade or business to Form W-8ECI. Treaty positions, permanent establishment and the 30% default withholding rate all interact.
A foreign-owned single-member LLC also has filing obligations most owners do not expect, including Form 5472 with a pro forma Form 1120, with substantial penalties for missing it. Withholding under chapters 3 and 4 may apply to payments made to you. None of that is visible from the W-9 request that brought you here. If this describes your structure, the money you spend on an advisor with cross-border experience will be less than the first penalty you avoid.
If a client insists on a W-9
- Send them the caution from the Form W-9 instructions. It is short, official, and settles the point.
- Supply the correct Form W-8 at the same time, so you are solving their problem rather than refusing.
- Explain what is at stake for them: accepting a W-9 they should not rely on leaves them exposed on chapter 3 and 4 withholding, and a withholding agent carries that liability.
- Do not sign the W-9 to make the friction go away. Certifying U.S. person status falsely carries a $500 penalty under IRC 6682 and can forfeit a treaty rate you were entitled to.
- If the relationship matters and the disagreement persists, get both sides advised. This is not a case to win by email.
Frequently asked questions
My US LLC is owned by a non-resident. Do I sign a W-9?
If the LLC is a single-member disregarded entity, no. The Form W-9 instructions carry an explicit caution: a disregarded U.S. entity with a foreign owner must use the appropriate Form W-8. The analysis follows the owner, who is not a U.S. person.
But the LLC is organized in the United States. Does that not make it a U.S. person?
A domestic entity is a U.S. person, so an LLC taxed as a corporation or partnership does complete a W-9. The wrinkle is that federal income tax does not treat a disregarded entity as separate from its owner, leaving no separate U.S. person to certify.
Which Form W-8 do we use?
That depends on the owner and the income, and it is genuinely a question for an advisor. A foreign individual owner generally points to Form W-8BEN; a foreign entity owner to W-8BEN-E. Where income is effectively connected with a U.S. trade or business, W-8ECI may apply instead.
What if our LLC elected corporate treatment?
Then it is no longer disregarded. It is a domestic corporation, a U.S. person in its own right, and it completes a W-9 with its own EIN, whoever owns it.
A client insists on a W-9 and will not accept a W-8. What now?
Send them the caution in the Form W-9 instructions and the correct W-8. If they still insist, do not sign the W-9: a false U.S. person certification exposes you to a $500 penalty and shifts a withholding liability onto them that they may not have priced. This is a case for professional advice on both sides.
General information, not tax advice. This page explains a federal tax form in plain English. It is not legal, tax, or accounting advice, and W9Form.org is not affiliated with the IRS. Verify everything against the official Form W-9 page on IRS.gov and speak to a licensed professional about your own situation. How we source and review these pages.