If you're a foreign corporation doing business in the US through a branch office, not an LLC or subsidiary, you’re required to file a Branch Tax Return using IRS Form 1120-F. Failing to file on time can result in the loss of deductions and tax exposure on gross income.
Let’s break down who needs to file, which taxes apply, and how you can remain compliant.
What Is a Branch Tax Return?
A Branch Tax Return is a US tax filing required by foreign entities that operate directly in the United States. This includes:
- Canadian consulting firms with US clients
- German manufacturers with US warehouses
- Any company earning effectively connected income (ECI) from US operations
These businesses must file IRS Form 1120-F to report US income, deductions, and tax liabilities.
Who Must File Form 1120-F?
You must file if your foreign company:
- Engages in a US trade or business
- Earns effectively connected income (ECI)
- Wants to claim deductions for expenses like salaries, rent, or depreciation
- Has US source income, even without a physical office in the US.
Filing is necessary to avoid being taxed on gross income without deductions.
Branch Tax Return Deadlines
If your fiscal year runs April-March:
- File Form 1120-F by July 15
- Need more time? File Form 7004 to extend the deadline to January 15 (of the following year)
Late filing can result in IRS penalties and lost tax deductions.
What Taxes Apply?
Income Tax on Effectively Connected Income (ECI)
- Flat 21% corporate tax rate
- Applies to revenue from US sales, services, or any operational activity
- Deductions allowed for related business expenses (e.g., payroll, rent, utilities)
Branch Profits Tax
If profits from your US branch are not reinvested locally, an additional 30% branch profits tax applies.
- Treated like a dividend equivalent
- Can often be reduced under tax treaties
Plan ahead to minimize this tax burden through reinvestment strategies.
Risks of Non-Compliance
Failing to file the 1120-F return on time or misclassifying income can lead to:
- Loss of business expense deductions
- Taxation on gross income
- IRS audit risk
- Penalties and interest for late or incorrect filings
Stay Compliant, File on Time
Filing a Branch Tax Return with Form 1120-F is a legal requirement for foreign companies doing business in the US. By meeting deadlines and understanding your obligations, you can:
- Reduce your tax liability
- Avoid branch profits tax surprises
- Preserve your right to claim deductions
Need help preparing or filing your foreign corporation tax return?
Contact FinStackk, we help global companies stay compliant with IRS rules and optimize their US tax strategy.