W-8BEN vs W-9 for Foreign LLC Owners — The Brokerage Account Trap
Foreign LLC owners who open US brokerage accounts often complete the wrong withholding certificate. This mistake can create perjury risk and unexpected tax liability.
Critical Warnings
- Foreign-owned disregarded LLCs must use W-8BEN or W-8BEN-E — never W-9
- Filing a W-9 as a non-US person constitutes a false certification under penalty of perjury
- Without proper withholding, YOU owe the 30% tax on US-source dividends and interest
- The IRS can match 1099 reports to your account — ignoring this will not make it go away
The Common Mistake
Here is the scenario. You are a non-US person who has formed a single-member LLC in the United States. The LLC is treated as a disregarded entity for US tax purposes. You decide to open a US brokerage account through your LLC to invest in stocks, bonds, or other securities.
During the account opening process, the brokerage runs you through a "tax interview" or asks you to complete a withholding certificate. You see two options: W-9 and W-8BEN. Your LLC has a US EIN. It has a US address. It was formed in a US state. So you complete the W-9 to "make the paperwork look right."
This is a serious mistake. The W-9 is exclusively for US persons. Having a US-formed LLC does not make you a US person. The tax status of a disregarded LLC flows through to its owner — and if the owner is a non-resident alien, the correct withholding certificate is W-8BEN (for individuals) or W-8BEN-E (for entities).
Why W-9 Is Wrong
Form W-9 (Request for Taxpayer Identification Number and Certification) is designed exclusively for US persons. When you sign a W-9, you are certifying under penalty of perjury that you are a US citizen, US resident alien, or a US entity.
A disregarded entity does not have its own tax identity separate from its owner. This is the entire point of "disregarded" status. When the IRS looks at your single-member LLC, they look through it to the owner. If the owner is a foreign person, the entity is treated as foreign for withholding purposes.
Who should file W-9
- US citizens or US resident aliens
- LLCs owned by US persons
- US corporations, partnerships, and trusts
Who should file W-8BEN / W-8BEN-E
- Non-resident aliens (individuals) — use W-8BEN
- Foreign entities — use W-8BEN-E
- Disregarded LLCs with a foreign owner — use W-8BEN (individual owner) or W-8BEN-E (entity owner)
Key point: The fact that your LLC was formed in Wyoming, Delaware, or any other US state is irrelevant. The fact that your LLC has a US EIN is irrelevant. What matters for withholding purposes is the tax residency of the owner, not the formation jurisdiction of the LLC.
Two Serious Consequences
Submitting the wrong withholding certificate is not a minor paperwork error. It triggers two distinct problems, each serious on its own.
Perjury Risk
When you sign a W-9, the certification section states (in part): "Under penalties of perjury, I certify that... I am a U.S. citizen or other U.S. person."
If you are not a US person, you have made a false statement under penalty of perjury on a federal tax document. While the IRS rarely prosecutes individual perjury cases for withholding certificates, the legal exposure exists. More practically, this false certification undermines any future argument that you acted in good faith if the IRS examines your account.
Missing Tax Withholding
When the broker receives a W-9, they classify you as a US person. US persons are not subject to the 30% withholding tax on US-source investment income. So the broker pays you the full amount — no withholding.
But you are actually a non-US person. You were always subject to that 30% withholding (or a reduced treaty rate). The tax is still owed. The only difference is that nobody collected it at the source. Now you owe it directly to the IRS, and you may not even realize it.
How FDAP Withholding Should Work
FDAP stands for Fixed, Determinable, Annual, or Periodical income. This category includes dividends, interest, rents, royalties, and certain other types of passive income. When a US payor (like a broker) pays FDAP income to a non-US person, they are required to withhold tax at the source.
Example: $1,000 Dividend Payment
This is how it is supposed to work when the broker has a valid W-8BEN on file. The broker withholds 30% (or the applicable treaty rate), sends the withheld amount to the IRS, and pays you the remainder. The broker reports this on Form 1042-S.
Treaty rates may apply. Many countries have tax treaties with the US that reduce the 30% withholding rate on dividends to 15% or even lower. To claim a treaty rate, you must provide a properly completed W-8BEN or W-8BEN-E that includes your treaty country and the applicable article. If you filed a W-9 instead, you cannot claim any treaty benefits.
What happens with a W-9 on file
You received the full $1,000 — but you still owe $300 (or the applicable treaty rate) to the IRS. The tax obligation does not disappear because the broker failed to withhold.
Joint and Several Liability
Under US tax law, the withholding agent (in this case, your broker) is the primary party responsible for collecting and remitting withholding tax on FDAP payments to non-US persons. This is sometimes called the "first line of defense" in the withholding system.
However, the liability for the underlying tax is joint and several. This means both the withholding agent and the beneficial owner (you) can be held responsible for the unpaid tax.
In practice, here is what happens: If the broker failed to withhold because you provided a W-9 (causing them to treat you as a US person), the broker may argue that they relied on your certification in good faith. The IRS may then pursue you directly for the missing tax.
The chain of liability
Broker is the primary withholding agent
The broker is supposed to withhold 30% on FDAP payments to non-US persons.
You gave the broker a W-9
The broker relied on your W-9 and classified you as a US person. No withholding was applied.
The broker may be protected
If the broker had no reason to doubt the W-9, they may argue reliance on your certification.
Liability falls to you
You are ultimately responsible for the tax on your own income. You must now file a return and pay.
What You Would Need to File
If you owe FDAP withholding tax that was not collected at source, you are required to file a US tax return to report the income and pay the tax. The specific form depends on your entity structure.
For individual foreign owners
- Form 1040-NR (US Nonresident Alien Income Tax Return)
- ITIN required (apply with Form W-7 if you do not already have one)
- Report FDAP income and calculate tax owed at 30% (or treaty rate)
For foreign corporate owners
- Form 1120-F (US Income Tax Return of a Foreign Corporation)
- Separate EIN required for the foreign corporation
- Report FDAP income and calculate tax owed
Important: These filings are in addition to your annual Form 5472 obligation. Your disregarded LLC must still file Form 5472 (attached to a pro-forma Form 1120) to report reportable transactions. The FDAP withholding issue creates a separate filing requirement on top of your existing one.
Penalties for non-filing: If you owe tax and do not file the required return, the IRS can assess penalties for failure to file (up to 25% of the tax owed) and failure to pay (0.5% per month). Interest also accrues from the original due date. These add up quickly.
How to Fix It
If you have already submitted a W-9 to your US broker when you should have filed a W-8BEN or W-8BEN-E, here are the steps you should take. Do not ignore this — the IRS receives copies of all 1099 forms issued by your broker and can match them against expected withholding.
Contact your broker immediately
Call or write to your brokerage and explain that you need to update your withholding certificate. Request to replace the W-9 on file with a W-8BEN (if you are an individual) or W-8BEN-E (if the LLC is owned by a foreign entity). Most brokers have a process for this.
Determine the tax impact
Review all US-source income you received while the W-9 was on file. This includes dividends, interest, capital gains distributions from mutual funds, and any other FDAP income. Calculate the 30% withholding tax (or applicable treaty rate) that should have been withheld.
Consult a tax professional
If the amounts involved are significant, work with a tax professional who understands international withholding. They can help you determine the exact filing requirements, apply any treaty benefits you may be entitled to, and navigate the process for paying the missing tax.
File the required returns
If tax is owed, you will need to file the appropriate US tax return (Form 1040-NR or Form 1120-F) and pay the outstanding tax. You may need to obtain an ITIN first if you do not already have one.
Keep documentation of the correction
Save copies of your W-9 replacement, the new W-8BEN/W-8BEN-E, all correspondence with the broker, and any amended 1099 or 1042-S forms you receive. This documentation shows the IRS that you acted to correct the error.
Do NOT ignore this. The IRS receives information returns (Form 1099-DIV, 1099-INT, etc.) from every US broker. If your account was classified as a US person account and you received dividends or interest, the IRS has a record of those payments. When no corresponding tax return matches that income, it raises a flag. Correcting the error proactively is always better than waiting for the IRS to contact you.
Prevention Checklist
Follow these rules to avoid the W-8BEN/W-9 trap and ensure your US brokerage account is set up correctly from the start.
Always do
- Use W-8BEN (individuals) or W-8BEN-E (entities) for any account where the beneficial owner is a non-US person
- Update your W-8 form every three years — they expire, and the broker will begin backup withholding at 24% if they lapse
- Include your tax treaty country and article number on the W-8BEN if a treaty applies — this is how you claim a reduced withholding rate
- Keep records of all US-source income, including dividends, interest, and capital gains distributions
- Verify the withholding shown on your 1042-S matches the expected rate for your treaty country
- Check if your country has a tax treaty with the US that reduces the 30% default withholding rate
Never do
- Never submit a W-9 if you are not a US person — regardless of the fact that your LLC is US-formed
- Never assume a US EIN makes you a US person for withholding purposes
- Never let a W-8 form expire without submitting a renewal
- Never ignore 1099 forms from your broker — if you received a 1099-DIV or 1099-INT instead of a 1042-S, your account may be incorrectly classified
Quick test: If your broker sends you a 1042-S at year end, your account is correctly classified as a foreign person account. If your broker sends you a 1099-DIV or 1099-INT, they think you are a US person — and you likely have a W-9 on file that needs to be replaced.
Next Steps
Disclaimer
This guide is for informational purposes only and does not constitute legal or tax advice. Tax laws are complex and subject to change. The information presented here is based on general principles and may not apply to your specific situation. You should consult a qualified tax professional before making any decisions about your tax filings, withholding certificates, or compliance obligations. ForeignLLCTax.com is not a law firm, CPA firm, or registered tax advisor.