CPA REG Study Guide 2026: Taxation & Regulation

The Regulation (REG) section tests an immense volume of tax law, but the biggest mistake is treating it like a memory test. Candidates fail when they try to brute-force memorize every threshold and phase-out, only to be paralyzed by a Task-Based Simulation that asks them to apply those rules to a messy, unfamiliar fact pattern. REG is an application exam; your goal is not to become a walking tax code, but to become a technician who can instantly identify the type of taxpayer, transaction, and entity in front of you to apply the correct framework.

What Makes REG So Deceptive

The sheer volume of content in REG is a classic misdirection. You will encounter hundreds of specific rules, dollar thresholds, and percentage limitations. The trap is believing that mastering these individual data points is the path to passing. It isn't. The exam is designed to punish this approach.

The Multiple-Choice Questions (MCQs) might let you get away with some pure recall, but the Task-Based Simulations (TBSs) will expose any weakness in your conceptual understanding. A single TBS can, and often will, weave together multiple topics. You won’t be asked "What is the S-Corp stock basis limitation?" Instead, you'll get a client scenario with distributions, property contributions with built-in gains, and separately stated items, and you'll be expected to calculate the shareholder's ending basis and determine the taxability of the distribution yourself.

If you only memorized the rules in isolation, you won't know where to start. Success on REG comes from pattern recognition—seeing a set of facts and immediately knowing which chapter of your mental textbook to open.

The "Basis First" Approach to Taming REG

If there is one concept that ties nearly all of REG taxation together, it's basis. It is the single most important thread connecting property transactions, individual taxation, and entity taxation. If you don't have a rock-solid, flexible understanding of how basis is calculated, adjusted, and used, you will struggle to score well on over half the exam.

Before you dive into the details of any single topic, spend your first 20-30 study hours mastering the concept of basis across all taxpayer types. This initial investment will pay dividends throughout your entire prep.

Here’s how basis forms the core of each major tax area:

1. Property Transactions: This is the purest application. Your ability to calculate the amount and character of a gain or loss starts and ends with determining the correct adjusted basis.
2. Partnership Taxation: This is arguably the most complex area, and it's all about basis. You must master the distinction between a partner's outside basis in their partnership interest and the partnership's inside basis in its assets. Nearly every transaction—contributions, distributions, loss limitations—hinges on this.
3. S-Corporation Taxation: A shareholder's ability to deduct pass-through losses is strictly limited by their stock and debt basis. Understanding the ordering rules for how distributions and losses affect basis is a frequently tested and critical skill.
4. C-Corporation Taxation: While shareholder basis is simpler here, corporate basis in its own assets after a property contribution from a shareholder is a key concept, especially in formation and distribution rules.
5. Individual Taxation: Calculating capital gains on the sale of stock, real estate, or other assets requires a clear understanding of the initial basis and any adjustments.

Focus on creating a comparison chart for how basis is calculated and adjusted for each entity type. This exercise alone will build the foundation you need for the rest of the material.

How to Structure Your 150-Hour Study Plan

Don't study the REG blueprint in order. The AICPA blueprint lists Ethics and Business Law first, but these are the worst places to start. They are self-contained topics that are heavy on memorization and have little conceptual overlap with the core tax content. You should organize your prep to build from foundational concepts to specific rules.

A more effective plan allocates your time in three distinct phases:

Phase	Focus Areas	Estimated Hours	Goal
Phase 1: The Tax Core	Property Transactions, Individual Taxation, C-Corps, S-Corps, Partnerships	90-100 hours	Build a deep, integrated understanding of how tax works. Focus on basis, income recognition, and the flow-through of items.
Phase 2: The Rules & Regs	Business Law, Ethics, Federal Tax Procedures	30-40 hours	Memorize the specific rules for contracts, agency, Circular 230, and taxpayer penalties. Keep these topics fresh for exam day.
Phase 3: Final Review	Cumulative Practice & Simulation Drills	20-30 hours	Work exclusively on mixed sets of MCQs and TBSs from all topic areas. Your goal is to sharpen your issue-spotting skills for the exam environment.

By front-loading the heavy conceptual lifting of core tax law, you give yourself time to absorb the connections between topics. Saving Business Law and Ethics for the middle of your plan ensures the material is fresh in your memory when you enter the final review phase, maximizing your retention of these more isolated, memory-dependent rules.