34.2 CFC, Foreign Tax Credit, and Permanent Establishment Concepts

Why these concepts are grouped

A TCP international simulation may hand you one fact pattern containing a U.S. parent, a foreign subsidiary, foreign taxes paid, U.S.-source payments to a foreign corporation, and employees traveling across borders. The exam is not asking for a treatise. It is testing whether you can sort signals into four buckets: controlled foreign corporation, foreign tax credit, withholding, and permanent establishment.

CFC signal

A controlled foreign corporation (CFC) is a foreign corporation more than 50% owned (by vote or value) by U.S. shareholders, where a U.S. shareholder is a U.S. person owning at least 10% of the vote or value. The core exam concept is current inclusion: certain CFC income flows to the U.S. shareholder currently even with no dividend. Two regimes drive this: Subpart F income (passive and mobile income such as interest, dividends, and certain related-party sales) and the global intangible low-taxed income rule under Section 951A, renamed Net CFC Tested Income (NCTI) by the 2025 One Big Beautiful Bill Act.

TCP rarely demands a full computation; it asks whether the structure changes the timing of U.S. tax. Read ownership facts closely: a foreign corporation held by many unrelated foreign investors is not a CFC, while a wholly owned foreign subsidiary of a U.S. parent is.

Foreign tax credit signal

The foreign tax credit (FTC) relieves double taxation when foreign-source income is taxed abroad and again by the U.S. It is capped, not unlimited. The limitation, computed separately per category ("basket"), is:

FTC limit = U.S. tax before credits x (foreign-source taxable income / total taxable income)

The creditable amount is the lesser of foreign taxes paid or that limit; an excess generally carries back one year and forward ten. A taxpayer may instead deduct the foreign tax, but the credit usually beats the deduction.

Worked FTC example

U.S. ParentCo has $1,000,000 total taxable income, of which $300,000 is foreign-source, and pays $90,000 of foreign tax. Pre-credit U.S. tax at 21% is $210,000. The limit is $210,000 x ($300,000 / $1,000,000) = $63,000. ParentCo credits $63,000 (the lesser of $90,000 paid or the $63,000 limit) and carries the $27,000 excess. Recognizing the cap, rather than crediting the full $90,000, is the exam point.

Permanent establishment signal

A permanent establishment (PE) is a fixed place of business or a dependent agent with contract authority substantial enough to let a country tax business profits under a treaty. Stay disciplined: a leased office with employees closing core sales points toward a PE; market research, a warehouse used only for storage, an independent agent, or a short visit without contract authority generally does not, unless the question says otherwise.

Withholding and source connection

A U.S.-source fixed or determinable annual or periodical (FDAP) payment such as interest, rent, royalty, or dividend paid to a foreign person is subject to a default 30% gross-basis withholding tax unless a treaty or statute reduces it. Do not assume a treaty rate from memory; if a reduced rate, exemption, or form (such as a withholding certificate) matters, the prompt will supply it.

Exam workflow

1. Identify who owns the foreign corporation and whether CFC status is signaled.
2. Separate operating income, dividends, royalties, interest, services, and branch income.
3. Source each stream and allocate related deductions.
4. Decide whether foreign taxes are creditable and apply the limitation.
5. Test whether U.S.-source payments to a foreign person trigger 30% withholding.
6. Evaluate whether activities create a permanent establishment under the stated assumptions.

This prevents the most common error: collapsing every international fact into one answer. A CFC inclusion, an FTC limit, withholding on a royalty, and a PE are related but answer different questions.

How the four signals interact in one scenario

These buckets are not independent silos; they feed one another, and TCP rewards candidates who see the chain. A CFC inclusion creates foreign-source income, which enlarges the foreign tax credit limitation and may carry a deemed-paid credit for the foreign taxes the CFC paid. Branch income flows directly onto the U.S. return and also generates foreign-source income for the limitation. A permanent establishment determination decides whether a foreign government may tax profits at all, which in turn determines how much foreign tax exists to credit. Withholding sits at the payment level and reduces the cash the foreign recipient nets.

Common TCP traps in this area

• Crediting taxes on U.S.-source income. Only foreign taxes on foreign-source income enter the credit; a foreign levy on income the U.S. sources domestically is generally not creditable against the limitation built on foreign income.
• Mixing baskets. Excess credits in the general-category basket cannot offset U.S. tax sitting in the passive-category basket. Keep them separate when the problem provides two streams.
• Assuming any local presence is a PE. Storage warehouses, purchasing offices, and pure information-gathering are typically excluded preparatory or auxiliary activities, so they do not, by themselves, create a taxable presence.
• Forgetting that withholding is gross-basis. The 30% applies to the gross payment, not net profit, which is why treaty reductions and exemptions are economically large and always supplied when relevant.