Form 1120 Guide for Foreign-Owned Single-Member LLCs

If you own a US LLC as a non-resident, you've likely heard that you need to file Form 1120. But what exactly does this mean, and how do you complete it? This guide explains everything you need to know.

Why Foreign-Owned LLCs File Form 1120

Here's the situation that confuses many foreign business owners:

Single-member LLCs are normally "disregarded entities" for US tax purposes—they don't file their own returns. But when a single-member LLC is owned by a foreign person, special rules apply.

The IRS requires these LLCs to file Form 5472 (Information Return of a Foreign-Owned Corporation). And Form 5472 must be attached to Form 1120. So foreign-owned single-member LLCs file Form 1120 primarily as a vehicle for Form 5472.

Pro-Forma vs. Full Form 1120

Pro-Forma Filing

Most foreign-owned single-member LLCs file a "pro-forma" Form 1120, which means:

• Basic identification information is completed
• Most financial lines show zeros
• No tax is calculated or owed
• Form 5472 is attached

Pro-forma filing is appropriate when your LLC:

• Has no effectively connected income (ECI)
• Has no US-source income subject to withholding
• Is truly a disregarded entity (not elected corporate treatment)

Full Form 1120

A full Form 1120 with actual financial information is required when:

• Your LLC has effectively connected income
• You've elected corporate tax treatment
• You have US employees or operations
• Other circumstances create actual tax liability

Completing Pro-Forma Form 1120

Page 1: Basic Information

Header Section

• Name and address of LLC
• EIN (Employer Identification Number)
• Date incorporated
• Total assets (from Schedule L)

Income Section (Lines 1-11) For pro-forma returns, most lines will be zero.

Deductions Section (Lines 12-27) Again, zeros for pro-forma filings.

Tax and Payments (Lines 28-35) Zeros, with possible checkboxes for various elections.

Schedule K: Other Information

Answer questions about:

• Business activity (NAICS code)
• Foreign ownership (check "Yes")
• Accounting method (typically cash)
• Other required disclosures

Schedule L: Balance Sheet

Even pro-forma returns need a balance sheet showing:

• Assets: Often just cash from capital contributions
• Liabilities: Usually zero or minimal
• Equity: Capital contributions from owner

Schedule M-1: Reconciliation

Reconciles book income to tax income. For pro-forma returns, this may show zeros or minimal entries.

Schedule M-2: Retained Earnings

Tracks changes in retained earnings. Shows beginning balance, contributions, distributions, and ending balance.

Key Schedules Explained

Schedule L Example

For an LLC with a $10,000 capital contribution:

Assets	Beginning	End
Cash	$0	$10,000
Total Assets	$0	$10,000

Equity	Beginning	End
Capital Stock	$0	$0
Additional Paid-in Capital	$0	$10,000
Total Liabilities & Equity	$0	$10,000

Schedule M-2 Example

Item	Amount
Beginning Retained Earnings	$0
Net Income	$0
Contributions	$10,000
Distributions	$0
Ending Retained Earnings	$10,000

Filing Requirements

When to File

Tax Year	Due Date	Extended Due Date
Calendar Year	April 15	October 15
Fiscal Year	15th day of 4th month	6-month extension

How to File

• E-file: Through approved IRS e-file providers (recommended)
• Paper: Mail to IRS service center for your state

Extension Process

File Form 7004 by the original due date to get an automatic 6-month extension.

Common Form 1120 Mistakes

1. Forgetting to Attach Form 5472

Form 1120 for foreign-owned LLCs must include Form 5472. Missing this triggers the $25,000 penalty.

2. Inconsistent Balance Sheet

Schedule L must balance. Assets must equal liabilities plus equity.

3. Wrong Filing Status

Don't check boxes or make elections that don't apply to your situation.

4. Missing Signatures

Form 1120 must be signed by an authorized person. This may require an ITIN.

5. Incorrect Tax Year

Use the correct tax year. Most single-member LLCs use the calendar year.

Form 1120 vs. Other Returns

Entity Type	Tax Form	Notes
Foreign-owned single-member LLC	Form 1120	Pro-forma with 5472
Multi-member LLC	Form 1065	Partnership return
C Corporation	Form 1120	Full corporate return
S Corporation	Form 1120-S	S-Corp return

The Role of Form 5472

Form 1120 serves as the "wrapper" for Form 5472. While Form 1120 may be largely zeros, Form 5472 contains the substantive reporting:

• Foreign owner identification
• Reportable transactions
• Related party information

The $25,000 penalty applies to Form 5472, not Form 1120 itself.

Professional Preparation

Given the complexity of corporate returns and the severe penalties for errors, professional preparation offers:

• Accurate form completion
• Proper schedule preparation
• Correct attachments
• E-filing capability
• Audit support if needed

Conclusion

Form 1120 for foreign-owned single-member LLCs is primarily a vehicle for Form 5472 compliance. Understanding this relationship—and completing both forms correctly—keeps your LLC in good standing with the IRS. Don't let the apparent complexity deter you; with proper preparation, this annual filing becomes routine.