Controlled foreign corporation (CFC): rules, definition, tax and reporting

If you own shares in a foreign company, the IRS may treat part of that company’s income as yours – even if you never receive a distribution. The controlled foreign corporation rules determine when this happens, which forms you must file, and what the tax consequences look like.

This guide covers the current rules for tax year 2025, filed during the 2026 filing season. Where the One Big Beautiful Bill Act changes rules for tax year 2026 and beyond, those changes are clearly labeled.

CFC taxation at a glance: Tax year 2025, filed in 2026

The table below summarizes the core CFC international tax rules that apply when you file your 2025 return in 2026.

 

If you own 10% or more of a CFC, you likely owe US tax on part of its income each year – even without receiving a distribution. This applies to US citizens, green card holders, and US residents alike.

Quick CFC checklist

• The company is incorporated outside the United States.
• US shareholders own more than 50% of its vote or value.
• You personally own 10% or more – directly, indirectly, or through attribution.
• The CFC earns Subpart F income, GILTI, or holds US property.

If you answered yes to all four, you have CFC reporting obligations and likely owe controlled foreign corporation tax on part of the company’s earnings.

What is a CFC (Controlled Foreign Corporation)?

A CFC is a foreign corporation in which US shareholders own more than 50% of the total combined voting power or total value of stock. That is the two-part test under IRC Section 957:

Foreign corporation + US shareholders owning > 50% of vote or value = CFC

A “US shareholder” for this purpose is any US person – citizen, resident, domestic corporation, partnership, trust, or estate – that owns 10% or more of the corporation’s voting power or value. This is not the same as a minority investor. If you own less than 10%, you are not a US shareholder under these rules, even if the corporation is a CFC.

Understanding the CFC meaning under US tax law matters because it determines whether you must file Form 5471 and include the CFC’s income on your personal return. A single US person who owns 100% of a foreign corporation has a CFC. So does a group of four US persons each owning 15%.

10% US shareholder rule

You are a US shareholder if you own 10% or more of a foreign corporation’s voting stock or value. This includes direct ownership, indirect ownership through foreign entities, and constructive ownership through family members and related parties under IRC Section 958.

Foreign corporation vs. foreign branch vs. disregarded entity

A foreign corporation is a separate legal entity organized under foreign law. A foreign branch is part of a US entity operating abroad – it files on the US entity’s return.

A disregarded entity – such as a single-member foreign LLC that has not elected corporate status via Form 8832 – is treated as an extension of its owner for US tax purposes. Only a foreign corporation can be a CFC.

A US controlled foreign corporation is subject to Subpart F, GILTI, and Section 956 – the three main current-taxation regimes described later in this article.

Is your company a CFC? A quick test:

• Is it incorporated or organized outside the US? → If no, it is not a foreign corporation.
• Do you or other US persons each own 10% or more of its vote or value? → If no, there are no US shareholders under Section 951(b).
• Do all US shareholders together own more than 50% of vote or value? → If no, it is not a CFC.
• If yes to all three → the company is a CFC, and each 10%-or-more US shareholder has filing and income-inclusion obligations.

CFC ownership test: Who counts as a US shareholder?

The CFC ownership rules determine whether you meet the 10% threshold and whether the corporation meets the 50% CFC threshold. The IRS does not look only at shares registered in your name – it also counts shares you own indirectly and shares attributed to you from related persons.

Three types of ownership

The 10% US shareholder threshold under IRC Section 958 is tested using three layers:

1. Direct ownership – shares registered in your name or held in your personal account.
2. Indirect ownership – shares owned through foreign entities. If you own 50% of a foreign partnership that owns 40% of a foreign corporation, you are treated as owning 20% of that corporation.
3. Constructive ownership – shares attributed to you from family members – spouse, children, grandchildren, parents – and from entities you are connected to under IRC Section 318, as modified by Section 958(b). This includes corporations, partnerships, trusts, and estates.

OBBBA change for tax year 2026: The One Big Beautiful Bill Act reinstated Section 958(b)(4), which blocks “downward attribution” from a foreign parent to a US subsidiary. This reverses a TCJA-era rule that had expanded CFC status to many foreign-parented groups. Effective for CFC tax years beginning after December 31, 2025.

Ownership attribution checklist

• Family: stock owned by your spouse, children, grandchildren, or parents can be attributed to you
• Partnerships: you are treated as owning your proportionate share of stock held by a partnership
• Corporations: if you own 50% or more of a corporation, its stock holdings can be attributed to you
• Trusts and estates: beneficiaries may be treated as owning stock held by the trust or estate

How attribution changes the outcome

 

The ownership test applies on any day during the CFC’s tax year for Subpart F and GILTI purposes. For tax year 2025, the income inclusion is based on ownership on the last day of the CFC’s tax year. Starting with CFC tax years beginning after December 31, 2025, you are an inclusion shareholder if you held stock at any time during the year.

Purpose of CFC rules

The CFC rules exist to prevent three specific tax-avoidance strategies:

• Profit shifting – moving income from a US business to a low-tax foreign subsidiary through related-party transactions, such as inflated intercompany payments for services or intellectual property.
• Indefinite deferral – accumulating active business earnings in a foreign corporation and never distributing them, so the US shareholder never owes US tax on the income.
• Passive income parking – routing investment income – interest, dividends, rents, royalties – through a foreign corporation in a jurisdiction with little or no tax on that income.

The Subpart F rules were enacted in 1962 to address passive income parking and profit shifting. GILTI, added by the Tax Cuts and Jobs Act in 2017, closed the deferral gap for active business income above a routine return on tangible assets.

Example: A US software developer owns 100% of an Irish subsidiary. The subsidiary licenses intellectual property and collects royalties from European customers. Without CFC rules, the developer could leave those royalties in Ireland indefinitely and owe no US tax. Under Subpart F, the royalty income is foreign personal holding company income – taxed to the developer in the year the subsidiary earns it, regardless of whether Ireland imposes its own tax.

A legitimate operating subsidiary that manufactures goods in a foreign country and sells them to unrelated customers in that same country generally does not generate Subpart F income. The CFC rules target the structure, not the business activity itself.

How CFC rules work

The CFC rules apply through a step-by-step process. If you own shares in a foreign corporation, here is how to determine whether you have a current-year US tax obligation.

• Step 1: Identify US shareholders. Determine every US person who owns 10% or more of the foreign corporation’s voting power or value, counting direct, indirect, and constructive ownership.
• Step 2: Apply attribution rules. Use the family, entity, and partnership attribution rules under Section 958(b) to calculate each person’s total ownership. A person who owns 7% directly but whose spouse owns 5% is treated as owning 12%.
• Step 3: Test the 50% CFC threshold. Add up the ownership percentages of all US shareholders – those at 10% or above. If the total exceeds 50% of vote or value on any day during the tax year, the corporation is a CFC.
• Step 4: Determine current-year inclusions. Each US shareholder must include their pro rata share of the CFC’s Subpart F income and GILTI on their own US return – whether or not the CFC distributes anything. This is the “deemed inclusion” that makes CFC taxation different from ordinary foreign investment.

Common mistakes

• Confusing the 10% US shareholder test with the 50% CFC control test. A person can be a US shareholder (owning 10%) of a corporation that is not a CFC (because total US shareholder ownership is 50% or below).
• Ignoring constructive ownership. Family attribution alone can push a person over the 10% threshold.
• Assuming a foreign corporation is not a CFC because no single US person owns a majority. Five unrelated US persons each owning 11% create a CFC (55% combined).
• Applying the 2026 “any time during the year” pro rata rule to 2025 returns. For tax year 2025, the inclusion is based on ownership on the last day of the CFC’s tax year.

The controlled foreign corporation test applies separately to each foreign entity. A US person who owns interests in three foreign corporations must test each one independently.

CFC tax rules can interact with each other in unexpected ways. For example, a US shareholder who also receives a salary from the CFC reduces the CFC’s tested income for GILTI purposes – but creates earned income that may be subject to self-employment tax.

How are CFCs taxed?

CFC tax obligations depend on the type of income the CFC earns and how the US shareholder holds their interest. The table below compares the four main CFC taxation regimes for tax year 2025.

 

Example: You own 100% of a CFC that earns $200,000 in consulting fees from unrelated foreign clients and $30,000 in interest on a bank deposit. The $30,000 interest is Subpart F income – taxed to you this year at ordinary rates. The $200,000 in active income is tested under GILTI. After subtracting a deemed 10% return on the CFC’s tangible assets, the excess is your GILTI inclusion.

Tax inclusion is not the same as a cash distribution

You owe US tax on your pro rata share of Subpart F income and GILTI even if the CFC retains every dollar. The CFC does not need to pay you a dividend for the income to appear on your US return. When the CFC eventually distributes those earnings, they are treated as previously taxed income under Section 959 and are not taxed a second time.

The CFC taxation rules can result in different outcomes depending on whether the US shareholder is an individual or a C corporation. Individuals generally pay higher effective rates on CFC inclusions because they do not receive the Section 250 deduction or the Section 245A dividends received deduction without making a Section 962 election.

How the foreign tax credit works for CFC income

Foreign taxes paid by a CFC can offset US tax on the shareholder’s CFC income – but the rules differ by income type. Understanding the CFC foreign tax credit interaction is important because the credit often determines whether a CFC shareholder owes additional US tax or not.

 

Example: Your CFC operates in Germany and pays a 30% effective corporate tax rate. For GILTI purposes in tax year 2025, 80% of that 30% is creditable – meaning 24% of the CFC’s tested income can offset your US GILTI tax. If your effective US rate on GILTI is 10.5% after a Section 962 election with the 50% Section 250 deduction, the foreign tax credit more than covers your US liability.

For tax year 2026 and beyond, the FTC percentage increases to 90% of foreign taxes paid – but the Section 250 deduction drops to 40%, raising the effective rate to 12.6%. Individual shareholders should evaluate how these changes affect their total tax position before making elections.

The credit is claimed on Form 1118 for corporations or Form 1116 for individuals. Sourcing rules and expense allocation can reduce the available credit, so the effective offset may be lower than the headline rate.

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Subpart F income – current tax on certain categories

Subpart F income is the oldest CFC current-taxation regime. It targets income that is easy to shift across borders or park in low-tax jurisdictions.

Main Subpart F categories under IRC Section 952:

• Foreign personal holding company income – dividends, interest, rents, royalties, and capital gains from the sale of property that produces such income
• Foreign base company sales income – income from buying or selling property involving a related party, where the property is manufactured and sold outside the CFC’s country of incorporation
• Foreign base company services income – income from services performed for or on behalf of a related party, outside the CFC’s country of incorporation
• Insurance income – income from insuring risks outside the CFC’s country of incorporation
• International boycott, illegal payments, and sanctioned-country income – generally less common but still included under Section 952

CFC income from these categories is taxed to the US shareholder in the year the CFC earns it. No distribution is required.

 

What is passive income in the CFC context?

CFC passive income generally means foreign personal holding company income under IRC Section 954(c) – dividends, interest, rents, royalties, annuities, and gains from property that produces such income. Active business income from manufacturing, selling goods to unrelated parties, or providing services independently is not passive income for Subpart F purposes.

Example: You own 100% of a CFC incorporated in Ireland. The CFC holds $500,000 in a UK savings account earning 4% interest – that is $20,000 of foreign personal holding company income. The CFC also earns $300,000 from software development services performed for unrelated Irish clients. The $20,000 is Subpart F income, taxed to you this year. The $300,000 is not Subpart F income – it is tested under GILTI instead.

The Section 954(c)(6) look-through rule, made permanent by the OBBBA, allows certain payments between related CFCs – such as dividends and interest – to be excluded from Subpart F if they are attributable to active business income. This can reduce Subpart F inclusions in multi-entity CFC structures.

GILTI – ongoing tax on business profits

GILTI – Global Intangible Low-Taxed Income – is a current-taxation regime that applies to active CFC income above a routine return on tangible business assets. For tax year 2025, this is the term used on IRS forms and instructions. Starting with CFC tax years beginning after December 31, 2025, the OBBBA renames GILTI to NCTI – Net CFC Tested Income.

GILTI formula (tax year 2025):

GILTI inclusion = your pro rata share of CFC tested income – 10% × your share of CFC qualified business asset investment

That means you take the CFC’s net income that is not already Subpart F income, subtract a 10% deemed return on the CFC’s depreciable tangible assets, and the remainder is your GILTI inclusion. If the CFC owns little tangible property – as is common with service businesses and IP-holding companies – most of the income is GILTI.

Who is most affected? Individual US shareholders of CFCs that earn active income in low-tax jurisdictions with few tangible assets. A software company in a country with a 5% tax rate and no physical equipment will generate a large GILTI inclusion.

Example: Your CFC earns $400,000 in tested income and has $200,000 in qualified business asset investment. GILTI = $400,000 – 10% × $200,000 = $380,000. You include $380,000 on your US return at ordinary income rates – unless you make a Section 962 election.

Watch-out list:

• Without a Section 962 election, individuals pay tax on GILTI at ordinary rates – up to 37% – with no Section 250 deduction. C corporations receive a 50% deduction for tax year 2025, reducing the effective rate to 10.5%.
• The Section 962 election lets individuals be taxed at corporate rates with the Section 250 deduction – but creates a second layer of tax when earnings are eventually distributed.
• The high-tax exception can exclude CFC income from GILTI if the effective foreign rate is at least 18.9% – that is 90% of the 21% US corporate rate – calculated using US tax principles.
• For tax year 2026, the Section 250 deduction drops from 50% to 40%, and the effective corporate rate on NCTI rises from 10.5% to 12.6%.
• The 10% deemed return on qualified business asset investment (QBAI) is eliminated for tax years beginning after December 31, 2025 – tested income is no longer reduced by this routine return before the Section 250 deduction and foreign tax credit rules apply, broadening the NCTI base for CFCs with meaningful tangible assets.
• GILTI foreign tax credits are limited to 80% of taxes paid for tax year 2025. This increases to 90% for tax year 2026. Excess GILTI FTCs cannot be carried forward.
• GILTI tested income and tested loss are calculated on a CFC-by-CFC basis but netted across all CFCs at the shareholder level.

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Section 956 investments – using CFC cash in the United States

Section 956 taxes US shareholders when a CFC invests its earnings in US property. The rule prevents shareholders from accessing CFC profits indirectly – through loans, guarantees, or asset transfers – without triggering a taxable distribution.

Investments that may trigger Section 956 include:

• Loans from the CFC to a US shareholder or a related US person
• CFC purchases of stock in a domestic corporation
• CFC guarantees or pledges of assets to secure a US person’s debt
• Tangible property located in the United States and used by the CFC
• Certain intellectual property rights licensed back to the United States

Red-flag checklist – does your CFC have US property exposure?

• The CFC has lent money to you, your spouse, or a US entity you control.
• The CFC has guaranteed any US loans or credit facilities.
• The CFC owns stock in a US corporation.
• The CFC owns or leases real property in the United States.
• The CFC has deposited funds with a US financial institution as collateral.

If yes to any of the above, you may have a Section 956 inclusion.

 

For individual shareholders, Section 956 remains a significant concern. The income inclusion is calculated based on the CFC’s average quarterly investment in US property, limited to the shareholder’s pro rata share of the CFC’s applicable earnings.

Example: Your CFC lends you $100,000 to purchase a US rental property. The loan is treated as a Section 956 investment. Your income inclusion is the lesser of: your pro rata share of the CFC’s average US property holdings, or your pro rata share of the CFC’s undistributed earnings. If the CFC has $500,000 in retained earnings and you own 100%, you include $100,000 at ordinary rates.

NOTE! The pro rata share rule for Section 956 continues to be based on ownership on the last day of the CFC’s tax year, even after the OBBBA’s “any time during the year” change for Subpart F and NCTI.

Previously Taxed Income (PTI)

Previously Taxed Income is the mechanism that prevents double taxation of CFC earnings. Under Section 959, amounts already included in a US shareholder’s income under Subpart F, GILTI, or Section 956 are not taxed again when the CFC distributes them.

How PTI works – a timeline:

1. Year 1: Your CFC earns $100,000 in Subpart F income. You include $100,000 on your US return and pay tax on it. The $100,000 becomes PTI in the CFC’s earnings pool.
2. Year 3: The CFC distributes $100,000 to you as a dividend. Because this amount was already taxed in Year 1, it is excluded from your gross income under Section 959(a). It is not a taxable dividend – but it does reduce the CFC’s earnings and profits.

Dividends from a controlled foreign corporation follow a specific ordering rule. Distributions come first from PTI – not taxed again – then from other earnings and profits – taxed as dividends. This ordering matters when a CFC has both previously taxed and untaxed earnings.

Records to keep for PTI tracking:

• Annual Subpart F and GILTI inclusions by CFC and by year
• Section 956 inclusions and the US property that triggered them
• Distributions received, with dates and amounts
• Foreign taxes paid and credited against each inclusion
• Elections made – Section 962, high-tax exception

For tax year 2025, IRS forms still use GILTI terminology when referencing PTI from GILTI inclusions. The CFC’s earnings and profits pool is tracked cumulatively, and errors in prior-year tracking can create incorrect tax results in later years. Accurate records are essential.

CFC reporting and compliance requirements

CFC reporting obligations apply to every US person who is an officer, director, or 10%-or-more shareholder of a CFC. The filing requirement exists even if the CFC has no taxable income and even if no US tax is due.

Compliance checklist:

• File Form 5471 with your annual US income tax return for each CFC in which you are a Category 4 or Category 5 filer
• File Form 8992 to calculate your GILTI inclusion, if applicable
• Report Subpart F income on Form 5471, Schedule I
• Track and report previously taxed income distributions
• Maintain records of CFC ownership changes, distributions, and intercompany transactions

Form summary

 

NOTE! Most US shareholders of a closely held CFC will not receive a Form 1099-DIV for a CFC distribution – foreign corporations generally aren’t required to issue one. You’re responsible for tracking distributions from the CFC’s own records and reporting them on your return, applying the previously taxed income ordering rules under Section 959.

Filing a CFC tax return means attaching these forms to your Form 1040 for individuals or Form 1120 for corporations. Late or incomplete filings trigger penalties even when no tax is owed.

Penalties under IRC Section 6038 are significant:

• $10,000 per CFC per annual accounting period for failure to file
• $10,000 per 30-day period – or fraction – for continued failure after a 90-day IRS notice, capped at $50,000 additional per failure
• Maximum total penalty: $60,000 per CFC per year – $10,000 initial + $50,000 continuation
• Foreign tax credit reduction: 10% of available foreign tax credits initially, plus 5% for each additional 3-month period of noncompliance

CFC requirements with the IRS apply regardless of whether the CFC earns any income subject to current US taxation. A dormant CFC with no revenue still requires Form 5471 if you meet a filing category.

What forms do I need to file for a CFC?

The answer depends on your relationship with the CFC and the type of income it earns. The matrix below covers the most common scenarios.

 

Common filing questions:

• Do I need to file Form 5471 every year? Yes, as long as you meet a filing category. There is no exception for years with no CFC income.
• What if I’m an officer but own no stock? You may still need to file Form 5471 if you are a Category 2 filer – an officer or director of a foreign corporation in which a US person acquires 10% or more.
• Can I file late without penalties? IRS’s Delinquent International Information Return Submission Procedures if you aren’t under examination or already contacted about the missing forms. A dormant CFC may qualify for simplified filing under Rev. Proc. 92-70.

The IRS’s authority to assess these penalties without going to court, challenged in Farhy v. Commissioner, was upheld by the D.C. Circuit in May 2024 and by the Second Circuit in Safdieh v. Commissioner in February 2026.

Because taxpayers with no legal residence in a US judicial circuit generally appeal Tax Court decisions to the D.C. Circuit, this outcome applies to most Americans abroad – though the question remains open in circuits that haven’t yet ruled, including the Eighth Circuit, where a contrary Tax Court decision is still on appeal.

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Filing triggers

A new filing obligation for Form 5471 is triggered by specific events – not just by ongoing ownership. The following events can create a new or changed reporting requirement.

Events that trigger a Form 5471 filing:

• Acquiring 10% or more of a foreign corporation’s stock – by vote or value
• Disposing of enough stock to drop below 10%
• A change in the corporation’s CFC status – becoming or ceasing to be a CFC
• Becoming a US person while holding 10% or more of a foreign corporation – for example, obtaining a green card
• Reorganization, merger, or liquidation of the foreign corporation
• Change in the CFC’s tax year
• Transfer of property to the foreign corporation – may also trigger Form 926

A missed trigger can create more than one year of filing obligations. If you acquired CFC stock three years ago and never filed Form 5471, you generally owe three separate filings – each subject to its own $10,000 penalty.

Penalty exposure is cumulative. A taxpayer with two CFCs who fails to file for three years faces up to $60,000 in potential initial penalties – 2 CFCs × 3 years × $10,000.

Tax strategies for CFC shareholders

Planning around CFC inclusions is fact-specific. The strategies below are available in certain circumstances, but each has limitations that depend on your income type, the CFC’s operations, and the foreign jurisdiction’s tax rate.

Planning considerations:

• Section 962 election – individuals can elect to be taxed on Subpart F and GILTI at corporate rates – 21% – and claim the Section 250 deduction, reducing the effective rate to 10.5% for tax year 2025. The trade-off: distributions of those earnings are taxed again as dividends when received.
• High-tax exception – if the CFC’s effective foreign tax rate is at least 18.9% – calculated using US tax principles – you can elect to exclude that income from GILTI. This is computed on a qualified business unit basis, not at the entity level.
• Entity classification – electing corporate or disregarded entity status via Form 8832 can change whether a foreign entity is treated as a CFC. A check-the-box election to disregard a foreign entity eliminates Form 5471 but may create different reporting requirements.
• Foreign tax credit coordination – stacking GILTI credits against Subpart F credits requires careful basket separation. Overpaying foreign taxes does not always produce a corresponding US offset. Sourcing rules and expense allocation can reduce the available credit, so the effective offset may be lower than the headline rate. Notice 2025-72 offers narrow transition guidance on allocating a CFC’s foreign taxes between its first required year and the following year under the OBBBA’s repeal of the Section 898(c)(2) deferral election.
• Timing of distributions – distributing PTI before untaxed earnings ensures no additional US tax. The ordering rules under Section 959(c) determine which dollars come out first.
• Year-end planning – actions taken before the CFC’s tax year-end – such as accelerating deductions or deferring income – can affect the GILTI and Subpart F calculations.

Before you act – checklist:

• Confirm which CFC income categories apply – Subpart F, GILTI, Section 956.
• Calculate the CFC’s effective foreign tax rate using US tax principles.
• Model the Section 962 election against your actual income and marginal rate.
• Consider the long-term cost of a second layer of tax on future distributions.
• Review whether any OBBBA changes – effective 2026 – will alter the analysis.

Example: A US individual owns 100% of a CFC in the UK that earns $500,000 in active consulting income. The UK corporate tax rate is 25%. Without a Section 962 election, the GILTI inclusion is taxed at the individual’s ordinary rate – 37%. With the election, the effective rate drops to 10.5% for tax year 2025, and 80% of the UK tax is creditable – likely eliminating the US GILTI liability. However, if the shareholder later distributes the earnings, the distribution is taxed as a dividend at up to 20% – the qualified dividend rate.

Need help navigating CFC rules? Talk to a tax expert today

CFC compliance involves multiple forms, overlapping income categories, and elections that interact with each other. Getting it wrong can mean penalties, double taxation, or missed planning opportunities.

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