Controlled Foreign Corporations (CFCs) are a hot topic for U.S. expats who own or are considering owning a foreign company abroad. Understanding the U.S. tax implications of a CFC is crucial for compliance and optimal tax planning. This article aims to provide a comprehensive overview of what a CFC is, the benefits, and the tax obligations under U.S. law, focusing on the Internal Revenue Code (IRC) sections relevant to CFCs in the United States.
What is a Controlled Foreign Corporation?
A Controlled Foreign Corporation is a corporate entity registered and operated in a foreign jurisdiction, where more than 50% of the total combined voting power or value is owned by U.S. shareholders. According to IRC Section 957, U.S. shareholders are defined as U.S. persons who own at least 10% of the foreign entity’s voting shares. This direct ownership is crucial for determining whether a corporation is a CFC under U.S. tax rules.

Combined Voting Power and Stock Ownership
The term “combined voting power” refers to the total voting rights held by U.S. shareholders in a foreign company. Stock ownership is not just direct but can also be indirect ownership through another entity. Understanding both direct and indirect ownership is crucial for determining CFC status.
Functional Currency and Financial Statements
The functional currency is the primary currency used in the day-to-day operations of the CFC. Financial statements, including balance sheets and income statements, must often be translated into U.S. dollars using the average exchange rate for the tax year. The functional currency, which is the primary currency used in the day-to-day operations of the CFC, plays a significant role in this translation process.
Benefits of Owning a CFC
Tax Planning Flexibility: Owning a CFC allows for more strategic tax planning. You can decide how to distribute profits, whether as dividends, salary, or retained earnings, to optimize your taxable income.
- Elimination of U.S. Self-Employment Tax: One of the most significant benefits for self-employed U.S. expats is the ability to pay oneself a salary from the CFC, potentially eliminating the U.S. self-employment tax. This is especially advantageous in countries that have not signed a totalization agreement with the United States, as these agreements often require payment of social security taxes to the host country, eliminating the U.S. self-employment tax.
- Deferral of U.S. Taxation: Under certain threshold requirements, income earned by a CFC can be deferred from U.S. taxation until it is distributed to U.S. shareholders as dividends. This allows for potential tax savings and the ability to reinvest undistributed earnings in the business before paying U.S. income tax.
- Access to Lower Corporate Tax Rates: If the CFC is located in a foreign jurisdiction with a lower corporation tax rate than the U.S., there may be opportunities for tax savings. However, this benefit is somewhat mitigated by the U.S.’s anti-avoidance provisions, such as the Global Intangible Low-Taxed Income (GILTI) tax and Subpart F rules, which aim to prevent profit-shifting to low-tax jurisdictions.
- Asset Protection: Owning assets through a CFC can provide an additional layer of legal protection, as the assets are owned by a separate legal entity. This can be beneficial in protecting assets from creditors or legal disputes.
- Estate Planning: A CFC can also be an effective tool for estate planning. By placing assets within a CFC, you may be able to more efficiently pass wealth to future generations, although this comes with its own set of complex tax implications that should be carefully considered.
- Business Expansion Opportunities: Having a CFC can make it easier to expand your business operations into other countries. The CFC can serve as a hub for international activities, potentially providing access to new markets and customers.
GILTI vs. Subpart F: What’s the Difference?
Both GILTI (Global Intangible Low-Taxed Income) and Subpart F income are U.S. tax provisions aimed at preventing U.S. taxpayers from shifting profits to low-tax jurisdictions through Controlled Foreign Corporations (CFCs). Both GILTI and Subpart F income calculations often involve considerations of the foreign corporation’s E&P (earnings and profits). However, they target different types of passive income and operate under distinct rules.
What is GILTI Tax?
GILTI is a provision introduced by the Tax Cuts and Jobs Act of 2017. It aims to tax U.S. shareholders on investment income earned by their CFCs that exceeds a 10% return on tangible assets. Essentially, it’s designed to target income that is presumed to be “intangible” like royalties, rather than income generated from physical assets like factories.
How It’s Taxed: GILTI is taxed at the U.S. shareholder’s marginal tax rate, and it’s calculated on a global basis, meaning it aggregates the income and assets of all CFCs owned by the U.S. shareholder. However, a 50% deduction is available for corporate U.S. shareholders, effectively reducing the tax rate to 10.5%. Foreign tax credits may also be available to offset the U.S. tax liability.
Related: Avoiding GILTI Tax for US Expats
What is Subpart F Income?
Subpart F income rules have been around since the 1960s and are designed to prevent U.S. shareholders from deferring U.S. tax by keeping certain types of easily movable income in foreign subsidiaries. This includes income like dividends, interest, rents, and royalties.
How It’s Taxed: Subpart F income is taxed immediately in the year it is earned, regardless of whether it is distributed to the U.S. shareholder. Multiple filers with the same filing requirements for the same foreign corporation must ensure that all Subpart F income is properly reported. The tax rate is the U.S. shareholder’s marginal tax rate. Unlike GILTI, Subpart F income is calculated on a per-entity basis, meaning each CFC is considered separately for Subpart F purposes.
Key Differences
- Type of Income: GILTI targets “intangible” income that exceeds a 10% return on tangible assets, while Subpart F targets specific types of easily movable income.
- Calculation Basis: GILTI is calculated on a global basis, aggregating all CFCs, while Subpart F is calculated on a per-entity basis.
- Tax Rate: Corporate U.S. shareholders can get a 50% deduction on GILTI, effectively reducing the tax rate to 10.5%. Subpart F income doesn’t offer this deduction.
- Foreign Tax Credits: Both allow for foreign tax credits, but the rules are more restrictive for GILTI.
- Deferral: Subpart F income is immediately taxable, while GILTI allows for some deferral opportunities based on the 10% return on tangible assets.
How Attribution Rules Can Affect U.S. Expats and Their Filing Obligation?
Attribution rules are a set of IRS regulations that determine who is considered the “constructive owner” of a corporation for tax purposes. These rules are particularly relevant for U.S. expats who may think they can avoid U.S. tax obligations by setting up a foreign corporation in the name of a foreign person, such as a non-U.S. spouse or other family members. However, under attribution rules, shares owned by a spouse, parents, children, or grandchildren can be “attributed” to the U.S. expat, making them the constructive owner. This means that even if the corporation is technically in someone else’s name, the U.S. expat could still be subject to U.S. tax filing requirements, including Form 5471 for Controlled Foreign Corporations (CFCs). Ignorance of these rules can lead to unexpected tax liabilities and penalties, making it crucial for U.S. expats to understand how attribution rules apply to their specific situations.

Filing Requirements and Deadlines for Form 5471
Form 5471 must be filed with the U.S. shareholder’s income tax return by the due date, including extensions. Failure to file Form 5471 or providing incomplete or inaccurate information can result in significant penalties. The IRS may impose a penalty of $10,000 for each form not filed, with additional penalties for continued non-compliance. Ensuring timely and accurate filing is crucial to avoid these penalties and maintain compliance with U.S. tax laws.
Different Categories of Filers for Form 5471
Form 5471 is required for various categories of U.S. shareholders who have different levels of ownership and control over foreign corporations, particularly Controlled Foreign Corporations (CFCs). These categories determine the specific filing requirements and the information that needs to be reported.
Category 1 Filers: These filers include U.S. shareholders of a specified foreign corporation that is considered a CFC. This includes those who own sufficient stock to meet the total combined voting power threshold. They must report detailed information on the foreign corporation’s taxable income, earnings, and profits (E&P), as well as Subpart F income and Global Intangible Low-Taxed Income (GILTI).
Category 2 Filers: These U.S. shareholders are officers or directors of a foreign corporation in which a U.S. person has acquired stock, resulting in ownership of at least 10% of the total combined voting power or value of the outstanding stock. This category focuses on reportable stock acquisitions and changes in stock ownership.
Category 3 Filers: This category includes U.S. shareholders who acquire or dispose of stock in a foreign corporation, resulting in them owning at least 10% of the voting power or value of the foreign corporation. They must file Form 5471 to report these transactions and their impact on the shareholder’s pro rata share of the corporation’s income.
Category 4 Filers: These are U.S. persons who had control over a foreign corporation during the foreign corporation’s tax year. Control is defined as owning more than 50% of the voting power or value of all classes of stock. Category 4 filers must provide detailed financial statements, including the income statement and balance sheet, and report any direct or indirect interest in the foreign corporation.
Category 5 Filers: U.S. shareholders who are required to include in their gross income the subpart F income of a CFC must file Form 5471. This category includes those who own stock directly or indirectly and are subject to the constructive ownership rules. These filers need to report on the CFC’s accumulated earnings, dividend income, and other relevant financial details.
Form 5471 ensures that the Internal Revenue Service (IRS) receives comprehensive information about the foreign corporations owned by U.S. persons, thereby preventing tax evasion through low-tax jurisdictions. Failure to file Form 5471 or filing it inaccurately can result in significant tax liabilities and penalties. Therefore, understanding the different categories of filers and their respective requirements is crucial for U.S. shareholders to remain compliant with the Internal Revenue Code.
In summary, navigating the intricate landscape of owning a Controlled Foreign Corporation (CFC) is a task that shouldn’t be taken lightly, especially for U.S. expats. Understanding the nuances of GILTI tax, Subpart F income, and attribution rules is crucial for ensuring compliance and optimal tax planning. Proper planning can help you avoid the pitfalls of double taxation, unexpected tax liabilities, and costly penalties.
Given the complexities involved, particularly with Form 5471, we strongly recommend consulting a tax professional. At 1040 Abroad, we charge $500 specifically for this form due to its intricate nature. We also offer free tax consultations via email to help you better understand your obligations and options.
If you have any questions or need further clarification, please don’t hesitate to contact us. We are committed to bringing tax knowledge to the world, empowering you to make informed decisions about your financial future.



