Understanding Federal Tax Obligations for Foreign-Owned LLCs: Form 5472, 1120, and FBAR

Imagine you're a founder from Europe launching your SaaS business in the US through a Wyoming LLC. You've secured an EIN and opened a US bank account. Business is booming — then you receive an IRS notice demanding penalties for failing to file Form 5472. Many foreign entrepreneurs face this situation. Operating a US LLC as a non-resident alien comes with specific federal tax obligations that are easy to miss but expensive to ignore.

This guide breaks down three key obligations: Form 5472, Form 1120, and FBAR (FinCEN Form 114).

Form 5472 — Information Return

Form 5472 is an information return that tracks transactions between a US corporation (including certain LLCs) and its foreign owners or related foreign entities. It's not a tax payment form — it's a transparency reporting mechanism the IRS uses to monitor potential tax avoidance.

Who Must File

You must file Form 5472 if a foreign person owns at least 25% of a US corporation (including a US LLC that is treated as a corporation for tax purposes). Even if the LLC owes no US income tax, the filing requirement still applies.

What to Report

Form 5472 requires disclosure of "reportable transactions" — any transaction between the LLC and a related party (foreign owner or related entities). This includes:

• Sales and purchases of inventory
• Rents and royalties paid or received
• Loans and interest payments
• Commissions paid or received
• Contributions to capital

The form requires transaction amounts, names and addresses of related parties, and the nature of each relationship.

Filing Deadline

Form 5472 is filed together with Form 1120 (the US Corporation Income Tax Return). The standard deadline is April 15 for calendar-year corporations (the 15th day of the 4th month after the tax year ends). Extensions are available.

Practical Examples

Example 1 — SaaS LLC: Your Wyoming LLC provides SaaS services to US customers and is 100% owned by you (a German resident). The LLC receives $50,000 in revenue. You pay yourself a "management fee" of $12,000. That management fee is a reportable transaction — you must file Form 5472 reporting the $12,000 payment, even if the LLC has no net taxable income after deductions.

Example 2 — Import/Export LLC: Your LLC imports goods from a factory you own in China, then sells them to US customers. The purchase amounts from your Chinese factory are reportable transactions that must be reported on Form 5472.

Penalties

• $25,000 per failure to file (per year, per form)
• An additional $25,000 per 30-day period the failure continues after IRS notification, up to a maximum of $25,000 per continuation period
• These penalties apply even if no tax was owed

Form 1120 — US Corporation Income Tax Return

Single-member LLCs owned by foreign persons are classified as disregarded entities by default, but the IRS requires them to file Form 1120 (for a "foreign-owned US DE") solely as a vehicle to attach Form 5472. No corporate tax is assessed on a disregarded entity, but the filing requirement exists.

Who Must File

Any foreign-owned single-member LLC (a "Foreign-Owned US Disregarded Entity") must file Form 1120 with an attached Form 5472 if it had any reportable transactions with its foreign owner during the year.

Filing Deadline

• April 15 for calendar-year filers
• October 15 with an extension (Form 7004)

What to Include

• Form 1120 (with a specific notation that it's a foreign-owned disregarded entity)
• Form 5472 attached, reporting all transactions between the LLC and its foreign owner

FBAR — Report of Foreign Bank and Financial Accounts (FinCEN Form 114)

The FBAR is a separate filing with the Financial Crimes Enforcement Network (FinCEN) — not the IRS. It applies to US persons (including LLCs classified as US entities) that have financial interest in or signature authority over foreign financial accounts.

When to File

File an FBAR if the aggregate value of all foreign financial accounts exceeded $10,000 at any point during the calendar year. This threshold applies to the total across all accounts.

Deadline

• April 15 (automatic extension to October 15 with no action required)

What to Report

• Foreign bank accounts
• Foreign brokerage accounts
• Foreign mutual funds
• Any other foreign financial account

The FBAR is filed electronically via the FinCEN BSA E-Filing System.

Penalties

• Non-willful violation: Up to $10,000 per violation
• Willful violation: The greater of $100,000 or 50% of the account balance at the time of the violation
• Criminal penalties may also apply for willful violations

Key Deadlines Summary

| Form | Deadline | Extension | | --- | --- | --- | | Form 5472 + 1120 | April 15 | October 15 (Form 7004) | | FBAR (FinCEN 114) | April 15 | Automatic to October 15 |

Common Mistakes to Avoid

• Failing to file Form 5472 because no tax is owed — the form is required regardless of taxable income
• Treating management fees as non-reportable — any payment between you and your LLC is a reportable transaction
• Missing the FBAR threshold — the $10,000 threshold is aggregate, not per account
• Not knowing about the Form 1120 requirement for single-member foreign-owned LLCs — this catches many founders off-guard

Action Checklist

• [ ] Determine if any foreign person owns 25%+ of your US LLC
• [ ] Track all transactions between you and the LLC throughout the year
• [ ] File Form 5472 + Form 1120 by April 15 (or file for extension by that date)
• [ ] Check if your aggregate foreign account balances ever exceeded $10,000 during the year
• [ ] File FBAR by April 15 if the threshold was met
• [ ] Consult a US CPA familiar with international tax if your situation is complex

FAQ

Does my single-member LLC need to file a tax return? Yes. Even if the LLC is a disregarded entity with no taxable income, you must file Form 1120 with an attached Form 5472 if the LLC had any transactions with you (the foreign owner).

What counts as a "transaction" for Form 5472? Any flow of money or value between you and the LLC — including capital contributions, loans, management fees, and revenue distributions.

Do I need to file FBAR if my LLC only has a US bank account? FBAR covers foreign financial accounts. A US bank account does not trigger FBAR. But if you personally hold foreign accounts, check the $10,000 aggregate threshold.

Can I get penalized even if I didn't know about Form 5472? Yes. The $25,000 penalty for failure to file applies even when the failure is due to lack of knowledge. This is why proactive compliance is critical.