Chapter 19: C Corporations

This chapter covers the C corporation tax regime from taxable income computation through advanced topics such as consolidated returns and international rules. The recurring task is to separate entity-level consequences from shareholder-level consequences while preserving the right corporate tax adjustments.

In This Chapter

• Computation of Taxable Income and Tax Liability explains the core corporate return framework.
• Allowable Credits and Deductions covers key items that reduce corporate tax liability.
• Capital Structure and Transactions Between Corporation and Shareholders examines the tax effects of financing and owner dealings.
• State and Local Tax Considerations, Nexus, Apportionment introduces the nonfederal issues that affect business taxation.
• Net Operating and Capital Losses (Carryback/Carryforward) explains how corporate losses are measured and used.
• Consolidated Returns: Eligibility, Elections, and Intercompany Transactions covers group reporting and intercompany effects.
• International Tax Concepts (Foreign Branch vs. Subsidiary, GILTI, FDII, BEAT) surveys the international concepts that can appear in advanced REG questions.

How to Use This Chapter

• Read this chapter when corporation questions feel scattered across too many separate subrules.
• Focus on the entity-level tax base first, then layer in credits, loss rules, and shareholder consequences.
• Revisit these sections when advanced C corporation items are being tested together in one case.

In this section

• Computation of Taxable Income and Tax Liability
  A comprehensive exploration of how C corporations compute taxable income and tax liability under the Internal Revenue Code, including gross income, deductions, and Earnings & Profits (E&P) considerations.
• Allowable Credits and Deductions
  Explore key corporate tax deductions and credits, including R&D and the foreign tax credit, and learn about typical credit ordering rules for C corporations.
• Capital Structure and Transactions Between Corporation and Shareholders
  Explore how dividends, redemptions, stock basis adjustments, and debt vs. equity rules affect taxation for C corporations and their shareholders.
• State and Local Tax Considerations, Nexus, Apportionment
  Explore how C corporations establish nexus, apply state apportionment formulas, navigate throwback rules, and comply with PL 86-272.
• Net Operating and Capital Losses (Carryback/Carryforward)
  Learn the rules for carrying back and carrying forward net operating and capital losses for C corporations, including distinctions between pre-2018 and post-2017 losses, special elections, and practical examples.
• Consolidated Returns: Eligibility, Elections, and Intercompany Transactions
  A comprehensive overview of consolidated filing procedures, group membership rules, and intercompany eliminations under U.S. federal tax law. Learn how affiliated groups elect, maintain, and optimize consolidated returns while navigating complex intercompany transactions.
• International Tax Concepts (Foreign Branch vs. Subsidiary, GILTI, FDII, BEAT)
  Learn the key distinctions and strategies for operating internationally through a foreign branch or subsidiary, and delve into core U.S. international tax provisions like GILTI, FDII, and BEAT.