AICPA Representative Tasks (verbatim). 1. Remembering & Understanding, Explain the sourcing of income for a U.S. corporation with foreign operations. 2. Remembering & Understanding, Explain the sourcing of income for a foreign corporation with U.S. operations, including consideration of treaty filing requirements. 3. Remembering & Understanding, Explain the concept of a controlled foreign corporation (CFC) and the impact on a U.S. corporation's taxable income. 4. Remembering & Understanding, Explain the concept of permanent establishment for a corporation and the activities that would create it. 5.
The U.S. taxes its citizens and residents on worldwide income, but source classification determines foreign tax credit limitations and treaty benefits. Each income category follows distinct mechanical rules.
KEY: Inventory sales by manufacturers split source: 50% based on production activities and 50% based on title passage. A U.S. manufacturer selling goods abroad with title passing overseas has 50% foreign source income even if all production occurred domestically.
A U.S. corporation with foreign operations must bifurcate income between U.S. and foreign sources. Foreign source income generates foreign tax credit capacity; U.S. source income does not.
Common mistakes
- Sourcing dividends by the payor's income source instead of incorporation. Dividends from a foreign corporation are foreign source regardless of where the foreign corporation earns its income. Trap: "subsidiary earns all U.S. income, so dividends are U.S. source." Correct: incorporation country controls.
- Applying the 50/50 manufacturing rule to purchased inventory. The production-activity allocation applies only to manufactured goods. Purchased inventory sources entirely by title passage. Trap: "all inventory sales split 50/50." Correct: only self-manufactured goods.
- Treating every dollar a CFC earns as a current inclusion. Only the Subpart F categories (foreign personal holding company income, foreign base company sales and services income, insurance income) are included currently; active income earned and sold in the CFC's own country is deferred until distributed.
Bottom line
- Income source (U.S. vs. foreign) determines taxability and foreign tax credit eligibility; source rules differ by income type (services where performed, inventory where title passes, interest/dividends by payor residence)
- A controlled foreign corporation (CFC) exists when U.S. shareholders owning 10%+ collectively hold more than 50% vote or value; Subpart F inclusions flow through currently regardless of distribution
- GILTI, FDII, BEAT, and the IC-DISC left the TCP blueprint in 2026; recognize the names, do not compute them
- Permanent establishment creates taxing jurisdiction for a foreign corporation; requires fixed place of business, dependent agent, or construction exceeding 12 months; without PE only FDAP withholding applies
Exam shortcut
Source mnemonic, "SPIT": Services where Performed; Interest by payor residence; Title passage for purchased inventory. Manufactured goods add the 50% production-activity overlay. CFC quick test: Count only shareholders owning ≥10%. If they collectively exceed 50% vote or value, CFC status applies. Ignore small shareholders entirely for the >50% test. Branch vs. subsidiary decision tree: Expect losses → branch (immediate deduction). Expect profits with low foreign tax → subsidiary (deferral).
The full lesson (about 2,928 words, 20 min read) adds 2 worked examples, all 6 common mistakes, a self-check, free in the app.
Learning objectives
- II.A4
Browse all free CPA TCP lessons or jump into free CPA TCP practice questions.