If your US company owns a foreign subsidiary, federal tax law generally treats a large share of that subsidiary’s profits as taxable to you the year it is earned, not the year it is paid out. That is the core of the foreign subsidiary tax rules: a controlled foreign corporation regime that pulls current earnings onto the US parent’s return, a separate set of rules for passive and mobile income, arm’s length pricing for every intercompany dealing, and annual information returns whose penalties are steep enough to reshape the whole compliance calendar. The One Big Beautiful Bill Act, signed in July 2025, permanently rewrote the rates and calculations that drive this system for tax years beginning after December 31, 2025.
When a Foreign Subsidiary Becomes a Controlled Foreign Corporation
A foreign corporation is a Controlled Foreign Corporation (CFC) when US shareholders collectively own more than 50% of either the total combined voting power or the total value of its stock on any day during the taxable year.1Office of the Law Revision Counsel. 26 U.S. Code 957 – Controlled Foreign Corporations Once that threshold is crossed, the subsidiary’s income can be taxed currently to its US owners.
A “US shareholder” for this purpose is any US person owning 10% or more of the foreign corporation’s voting power or value.2Office of the Law Revision Counsel. 26 USC 951 – Amounts Included in Gross Income of United States Shareholders The value prong matters: someone holding only non-voting preferred can still be a US shareholder if those shares represent 10% or more of the corporation’s total value. Ownership is measured directly and through attribution rules that treat stock held by related parties as owned by the US person.
A subsidiary is different from a foreign branch. A branch is not a separate legal entity, and its income flows straight onto the parent’s return. A subsidiary is its own corporate person under foreign law, and it is that legal separation that triggers the CFC reporting regime instead of simple consolidation.
Current US Tax on the Subsidiary’s Earnings: NCTI in 2026
The 2017 Tax Cuts and Jobs Act imposed current US taxation on a broad base of CFC earnings whether or not those earnings are distributed.3Internal Revenue Service. Tax Cuts and Jobs Act: A Comparison for Large Businesses and International Taxpayers That regime was known as GILTI (Global Intangible Low-Taxed Income). The 2025 legislation renamed it Net CFC Tested Income (NCTI) and reworked the math for tax years beginning after December 31, 2025.
What the Parent Includes
Under the old rules, a US parent could exclude from GILTI a deemed 10% return on the subsidiary’s depreciable tangible property (Qualified Business Asset Investment, or QBAI). Starting in 2026, that QBAI exclusion is gone. The full net tested income of the CFC is pulled into the US parent’s taxable income as NCTI, with no offset for the subsidiary’s tangible asset base. For capital-intensive foreign operations, that is a real expansion of the US tax base.
The Section 250 Deduction and the Effective Rate
The US parent claims a Section 250 deduction equal to 40% of the NCTI inclusion. Multiplied against the 21% corporate rate, that produces an effective US rate of 12.6% on the included foreign earnings. Under the prior rules the deduction was 50% and the effective rate was 10.5%.
Foreign Tax Credits
The parent is deemed to have paid a portion of the foreign income taxes its CFC actually paid on the tested income. For tax years beginning in 2026, that deemed-paid credit covers 90% of the allocable foreign taxes, up from 80%.4Office of the Law Revision Counsel. 26 U.S. Code 960 – Deemed Paid Credit for Subpart F Inclusions As a rule of thumb, if the CFC’s local effective tax rate runs around 14% or higher, foreign tax credits will generally wipe out residual US tax on the NCTI inclusion. Excess credits still cannot be carried to other tax years, so the timing of foreign tax payments matters.
Subpart F Income
Separate from NCTI, the older Subpart F regime continues to tax specific categories of passive and easily movable CFC income currently to US shareholders.5Office of the Law Revision Counsel. 26 U.S. Code 952 – Subpart F Income Defined The main categories:
- Foreign personal holding company income: interest, dividends, rents, and royalties not earned in the active conduct of a business. This is the most common Subpart F category and it catches most passive investment earnings held offshore.
- Foreign base company sales income: profits from buying goods from a related party and selling them outside the CFC’s country of incorporation. The classic case is a low-tax subsidiary acting as a middleman for goods manufactured elsewhere.
- Foreign base company services income: fees for services performed for a related party outside the CFC’s home country.
- Insurance income, income tied to international boycott participation, and income from countries subject to US sanctions.
Subpart F income does not get the Section 250 deduction. It hits at the full 21% corporate rate, offset only by available foreign tax credits. Income classified as Subpart F is excluded from the NCTI calculation so it is not counted twice.
Bringing Cash Home: Section 245A
When a CFC actually pays a dividend to its US corporate parent, that dividend is generally tax-free under the participation exemption the TCJA created and the 2025 legislation made permanent. Section 245A gives a 100% dividends-received deduction for the foreign-source portion of dividends paid by a specified 10-percent owned foreign corporation to a domestic C corporation shareholder.6Internal Revenue Service. Section 245A Dividends Received Deduction Overview
Conditions: the parent must be a domestic C corporation (not a REIT or regulated investment company), it must meet the 10% ownership test, and it must have held the stock for at least one year. The foreign corporation cannot be a Passive Foreign Investment Company. When those conditions are met, cash can move home without additional US tax on the dividend itself.
This does not undo NCTI. The earnings were already taxed currently when earned; Section 245A prevents a second layer of tax on the same money when it is actually distributed.
Transfer Pricing Between Parent and Subsidiary
Every transaction between a US parent and its foreign subsidiary must be priced as though the two parties were unrelated and dealing at arm’s length. Section 482 gives the IRS broad authority to reallocate income between related entities when the pricing does not reflect what independent parties would agree to in a comparable transaction.7Office of the Law Revision Counsel. 26 USC 482 – Allocation of Income and Deductions Among Taxpayers This is where most international disputes with the IRS start. If the agency decides the parent charged its subsidiary too little for licensed technology, or the subsidiary charged the parent too much for components, it can rewrite the transaction and assess tax plus penalties.
The Treasury regulations set out prescribed methods by transaction type. For sales of tangible goods, the comparable uncontrolled price method is generally preferred when reliable comparables exist. For services, several approaches are laid out in 26 CFR 1.482-9.8eCFR. 26 CFR 1.482-1 – Allocation of Income and Deductions Among Taxpayers Transfers of intangible property must produce income “commensurate with the income attributable to the intangible,” which gives the IRS room to second-guess valuations after the fact.
The only reliable way to eliminate transfer pricing uncertainty is an Advance Pricing Agreement through the IRS’s Advance Pricing and Mutual Agreement program. An APA is a binding arrangement establishing the transfer pricing method for specified transactions over a set period, typically five years. Bilateral agreements that include the foreign tax authority give the strongest protection against double taxation.9Internal Revenue Service. Advance Pricing and Mutual Agreement Program The process is expensive and slow, but for companies with large intercompany flows the certainty can be worth the cost.
BEAT: Only if the Group Is Large Enough
The Base Erosion and Anti-Abuse Tax applies only to corporations with at least $500 million in average annual gross receipts over the prior three years and whose deductible payments to foreign affiliates exceed 3% of total deductions (2% for banks and securities dealers). Smaller groups do not need to run the calculation.
When BEAT applies, the corporation calculates a minimum tax by adding back base erosion payments to taxable income and applying the BEAT rate. Under the 2025 legislation, the permanent BEAT rate starting in 2026 is 10.5%, plus an additional 1% for banks and certain financial institutions. If the BEAT liability exceeds the regular tax liability, the company pays the difference.
Annual Information Returns: Form 5471 and Its Companions
The tax math is only half the compliance load. The US parent must file detailed information returns with its own tax return each year, and this is where most of the administrative weight sits.
Form 5471
Form 5471 is the primary information return for US persons with interests in foreign corporations, and any US shareholder of a CFC has to file it.10Internal Revenue Service. About Form 5471, Information Return of U.S. Persons With Respect To Certain Foreign Corporations The form requires a complete balance sheet, income statement, and a reconciliation of the subsidiary’s books from local accounting standards to US tax principles. It attaches to the parent’s Form 1120 (including extensions), and the CFC’s tax year generally must conform to the parent’s. Form 5471 is what feeds the NCTI and Subpart F numbers reported elsewhere on the return.
Forms 8992 and 8993
The NCTI inclusion itself is computed and reported on Form 8992, which walks through tested income, the foreign tax credit calculation, and the amount pulled into gross income.11Internal Revenue Service. About Form 8992, U.S. Shareholder Calculation of Global Intangible Low-Taxed Income (GILTI) The Section 250 deduction is computed on Form 8993.12Internal Revenue Service. Instructions for Form 8992 – U.S. Shareholder Calculation of Global Intangible Low-Taxed Income (GILTI)
Reporting Transfers of Cash or Property to the Subsidiary
A separate reporting obligation kicks in whenever a US person transfers cash or property to a foreign corporation. A US person must file Form 926 for a cash transfer if, immediately after the transfer, the person holds at least 10% of the foreign corporation’s voting power or value, or if cash transfers to that corporation exceed $100,000 in any 12-month period.13Internal Revenue Service. Instructions for Form 926 Transfers of tangible property, intangible property, and stock or securities in some reorganizations also require the filing.
The penalty for missing Form 926 is 10% of the fair market value of the transferred property, capped at $100,000 per transfer, with no cap when the failure was intentional.14eCFR. 26 CFR 1.6038B-1 – Reporting of Certain Transfers to Foreign Corporations Missing the filing can also cost favorable tax treatment for the transfer and keeps the statute of limitations open indefinitely on the associated tax year until the information is filed.
Penalties and the Open Statute of Limitations
The information-return penalties in the international area are unusually harsh, and the statute of limitations consequence is often the worse of the two problems.
Form 5471 Penalties
Failing to file Form 5471, or filing one with materially incomplete or inaccurate information, triggers a $10,000 penalty for each annual accounting period of each foreign corporation. If the failure continues more than 90 days after the IRS mails a notice, an additional $10,000 accrues for each 30-day period the noncompliance persists, up to $50,000 per failure.15eCFR. 26 CFR 1.6038-2 – Information Returns Required of United States Persons With Respect to Certain Foreign Corporations For a parent with several foreign subsidiaries, those penalties stack across entities fast.
The Return Stays Open
Under Section 6501(c)(8), if a taxpayer fails to file any required international information return, including Form 5471 and Form 926, the normal three-year statute of limitations on the entire tax return does not begin to run until the required information is provided to the IRS.14eCFR. 26 CFR 1.6038B-1 – Reporting of Certain Transfers to Foreign Corporations A missed Form 5471 from 2018 can leave the whole 2018 return open to audit indefinitely.
There is a narrow escape. If the taxpayer can show the failure was due to reasonable cause and not willful neglect, the open-statute rule applies only to items related to the missing return rather than the entire return. Reasonable cause is the taxpayer’s burden to prove, and the IRS does not grant it freely.