Browse Taxation and Regulation (REG)

Chapter 20: S Corporations

REG S corporation coverage for eligibility, elections, basis, built-in gains, passive income, and distributions.

This chapter explains the S corporation rules that combine corporate form with pass-through taxation. REG questions in this area usually hinge on eligibility, owner basis, and the special taxes or termination risks that can disrupt the intended pass-through result.

In This Chapter

How to Use This Chapter

  • Read this chapter when S corporation questions are being treated as simple partnership look-alikes.
  • Focus on eligibility, basis, and accumulated-account issues that make S corporations distinct.
  • Return here whenever a question mixes built-in gains, passive income, and distribution consequences.

In this section

Revised on Friday, April 24, 2026