BAR vs. ISC vs. TCP: How to Choose Your CPA Discipline Section

The New Discipline Requirement

The 2024 CPA Evolution restructured the Uniform CPA Examination from four undifferentiated sections into three core sections (FAR, AUD, REG) plus one discipline section chosen by the candidate. Every CPA candidate must now choose from:

• BAR: Business Analysis and Reporting
• ISC: Information Systems and Controls
• TCP: Tax Compliance and Planning

Choosing the wrong discipline section can cost you weeks of preparation time and a failed exam attempt. Choosing the right one can give you a meaningful advantage, especially if your prior experience or career direction aligns with the content. Here is what you need to know.

What Each Section Covers

BAR: Business Analysis and Reporting

BAR is the most content-dense of the three discipline sections. It extends the financial accounting material from FAR and adds business analysis and managerial accounting content that has no equivalent in the core sections.

Major content areas:

• Business analysis: Ratio analysis, trend analysis, forecasting, variance analysis, and the analytical procedures auditors use to assess financial statement reliability. This includes a significant amount of data analytics and how to interpret financial information in a business decision context.
• Technical accounting and reporting: The more complex topics within US GAAP that FAR covers at a surface level, including business combinations and consolidations, variable interest entities, derivatives and hedging under ASC 815, foreign currency transactions, and fair value measurements.
• Managerial accounting: Cost-volume-profit analysis, budgeting, standard costing, and performance measurement frameworks such as the balanced scorecard.

BAR candidates are typically accounting majors with broad financial statement backgrounds, such as auditors, financial reporting professionals, or candidates aiming for controller or CFO roles. If you spent your review course on FAR and felt comfortable with financial statement analysis but also want the most challenging discipline section, BAR is probably your path.

Practise BAR MCQs to assess whether your financial analysis knowledge is at exam level.

ISC: Information Systems and Controls

ISC is the most distinct of the three discipline sections. It covers IT governance, information systems security, systems auditing, and internal controls over technology, content that has relatively little overlap with the three core sections.

Major content areas:

• IT governance and IT general controls: How organisations govern and manage IT systems, including change management controls, logical access controls, and IT operations controls.
• Security, confidentiality, and privacy: Cybersecurity frameworks (including AICPA's Trust Services Criteria), data classification, encryption, and privacy obligations under relevant regulations.
• Systems auditing and assurance: How IT systems are audited, including the SSAE 18 SOC framework, SOC 1, SOC 2, and SOC 3 reports, and the role of IT in financial statement audits.
• Business process controls and information technology: Application controls, input/output controls, and how automated controls interact with manual controls in financial processes.

ISC candidates typically include IT auditors, IT risk professionals, candidates with a computer science or MIS background who are pursuing CPA licensure, and audit professionals who work on technology-focused engagements. If you find the IT governance and systems security content genuinely interesting (rather than daunting), ISC can be a strong choice.

Practise ISC MCQs to see how the content compares to your background.

TCP: Tax Compliance and Planning

TCP extends the REG section's federal taxation content into more advanced individual and entity tax planning territory. If you are comfortable with the REG content and your career is in tax, TCP is the natural choice.

Major content areas:

• Tax compliance for individuals: Complex individual income tax situations including passive activities, at-risk rules, alternative minimum tax, net investment income tax, and tax treatment of business interests held by individuals.
• Entity taxation: Deeper coverage of C corporation, S corporation, and partnership taxation than REG provides, including multi-year planning considerations, distributions, and basis adjustments.
• Tax planning strategies: How entities and individuals structure transactions to minimise tax liability within the law, including entity choice, compensation structuring, and timing of income and deductions.
• Property transactions: Advanced coverage of gain and loss recognition, like-kind exchanges under IRC §1031, instalment sales, and involuntary conversions.

TCP candidates are almost exclusively those pursuing careers in public accounting tax practices, corporate tax departments, or tax law. If you passed REG and want to demonstrate deeper tax competence, TCP reinforces and extends that preparation.

Practise TCP MCQs to see whether you are building on solid REG foundations or identifying areas that need more work.

How the Sections Compare

Difficulty

Based on early pass rate data from 2024–2025 and candidate feedback, the sections rank roughly as follows from hardest to easiest:

1. BAR. The combination of technical accounting, managerial accounting, and data analytics creates the most material to master, and the technical accounting topics (consolidations, derivatives, hedging) are genuinely complex.
2. TCP. Requires deep knowledge of tax rules that REG introduces but does not fully test. Candidates without extensive tax backgrounds will find this section demanding.
3. ISC. Has a different knowledge profile to the core sections. Candidates with IT backgrounds find it accessible; those without that background face a steeper initial learning curve but often find the conceptual framework more manageable than accounting mechanics.

That said, the "easiest" section is always the one most aligned with your background. A Big 4 IT auditor will find ISC significantly easier than BAR. A tax associate who has spent two years doing compliance work will find TCP far more approachable than BAR.

Career Alignment

The discipline section you choose does not restrict what work you can do as a CPA. The licence is the same regardless of which discipline section you passed. But choosing the section closest to your intended career path means you are studying material that will also be useful in your day-to-day work, which makes preparation both more efficient and more practical.

Popularity

Based on available candidate data from the first two years of CPA Evolution, BAR is by far the most popular discipline section, accounting for roughly 65–70% of discipline section sittings. TCP accounts for approximately 25–30%, and ISC is the smallest at around 5–10%.

BAR's popularity reflects two things: its content is closest to the traditional BEC section it replaced, and most CPA candidates come from financial accounting backgrounds. ISC's lower popularity partly reflects the smaller pool of candidates with relevant IT backgrounds, though it also means ISC-passing CPAs can differentiate themselves in the IT audit job market.

The Bottom Line

Choose the discipline section where your prior knowledge gives you a head start. Studying for a section where you are building from scratch is significantly more demanding than studying a section where your day job or academic background provides a foundation.

If you are genuinely uncertain between BAR and one of the other options, default to BAR. It is the broadest section, covers the most professionally relevant material for most accounting roles, and its pass rates, while lower than ISC, are well within reach with adequate preparation.

Whatever you choose, start with practice questions early to calibrate how much work you have ahead. BAR practice questions, ISC practice questions, and TCP practice questions are all available to help you make an informed decision and begin building exam-ready knowledge.