Quick Answer

If you are a non-US resident who owns 25% or more of a US LLC (disregarded entity), you must file Form 5472 and a pro forma Form 1120 every year by April 15. You must file these forms even if the LLC made no money and owes no US tax. Failure to file results in an automatic $25,000 IRS penalty.

Key Points for 2026

  • Form 5472: Discloses transactions between the LLC and the foreign owner.
  • Pro Forma 1120: A cover sheet for Form 5472 containing basic identifying information.
  • FBE Status: A foreign-owned single-member LLC is treated as a disregarded entity for taxes, but as a corporation specifically for Section 6038A reporting requirements.
  • BOI Report: As of 2024/2025, you must also file a FinCEN Beneficial Ownership report, requiring copies of your foreign passport.

The Core IRS Filings

1. Form 5472 and Form 1120

These two forms go together. The IRS requires foreign owners to report "reportable transactions" (like capital contributions, loans, or owner's draws). You fill out Form 5472 and attach it to a "pro forma" (partially completed) Form 1120. These forms must be faxed or mailed to the IRS by April 15 (or the 15th day of the 4th month following the end of your tax year).

2. FBAR (FinCEN Form 114)

If your US LLC opens a foreign bank account (outside the US) and the balance exceeds $10,000 at any point during the year, you may need to file an FBAR.

3. Form 1040-NR

If your LLC has Effectively Connected Income (ECI)—meaning you have physical operations, dependent agents, or real estate in the US—you must file a non-resident tax return (1040-NR) and pay US income taxes on that profit.

The $25,000 Penalty

The IRS does not issue warnings for Form 5472. If you miss the April 15 deadline, or if the form is deemed substantially incomplete, the IRS assesses an automatic $25,000 penalty. This penalty applies even if you had $0 in revenue.

Example Scenario

The Situation: Lars lives in Germany and forms a Wyoming LLC to run an Amazon FBA business. He has no US office and no US employees. The LLC makes $50,000.

The Mistake: Lars assumes that because he has no "US nexus" or ECI, he doesn't have to file anything with the IRS.

The Reality: While Lars might not owe US income tax, he is still strictly required to file Form 5472 and Form 1120. By ignoring this, Lars incurs a $25,000 penalty. He must hire a US CPA to file the forms and request abatement.

What to Do Next

  1. Get your EIN: You cannot file Form 5472 without an Employer Identification Number.
  2. Keep pristine records: Track every dollar that moves between your personal foreign bank account and your US business bank account.
  3. Hire a Professional: Do not attempt to file Form 5472 yourself. Hire a US CPA who specializes in foreign-owned US LLCs.

See also: LLC Taxes for Foreign Owners — Complete 2026 Guide →