CPE

What Is Circular 230? A Guide for Tax Professionals

August 28, 2026

Black female tax preparer works with a client while practicing what's outlined in Circular 230

Marketing Manager, Content

Every tax professional who represents a client before the IRS is operating under a set of federal rules that predate the modern tax code itself. Those rules, known as Circular 230, shape everything from the due diligence a practitioner owes a client to the fees they can charge and the conduct that can end a career. This guide breaks down what Circular 230 actually is, where it came from, what it covers, and what is at stake for practitioners who do not follow it.

Quick Answer: What Is Circular 230?

Circular 230 is the set of Treasury Department regulations that governs who may practice before the IRS and how they must conduct themselves while doing so. Formally titled "Regulations Governing Practice Before the Internal Revenue Service," it is codified at 31 CFR Part 10 and applies to attorneys, Certified Public Accountants, Enrolled Agents, Enrolled Retirement Plan Agents, Enrolled Actuaries, and other individuals who represent taxpayers before the IRS. It sets standards of competence and conduct, defines what counts as disreputable behavior, and lays out the disciplinary process the IRS Office of Professional Responsibility (OPR) uses to enforce those standards, up to and including suspension or disbarment from practice.

For CPAs and EAs, Circular 230 is not optional background reading. It is the framework of ethics for tax practitioners that determines whether you can keep representing clients before the IRS at all.

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The History of Circular 230

Circular 230's origin predates the modern federal income tax system entirely. Its statutory authority, 31 U.S.C. Section 330, traces back to 1884 legislation, sometimes referred to informally as the Horse Act, which authorized the Secretary of the Treasury to regulate individuals representing claimants before the Treasury Department. At the time, Congress was responding to a real problem: unqualified and sometimes dishonest agents were charging citizens, including Civil War veterans, for help pursuing claims against the government, including claims for property such as horses lost in military service. Congress wanted the Treasury Department to be able to screen these representatives for good character, good reputation, and the qualifications needed to actually help their clients.

The Treasury Department issued guidance under this authority for decades in the form of individual circulars. In 1921, those circulars were consolidated into a single governing document: Treasury Department Circular No. 230. That original publication is the direct ancestor of the regulations tax professionals work under today.

Circular 230 has never been static. It has been amended multiple times since 1921 to keep pace with changes in the tax system and the practice of representing taxpayers. Some of its best-known provisions, including standards for written tax advice, came out of a significant 2005 revision responding to concerns about abusive tax shelters. Currently, the 2014 revision remains the operative version of Circular 230, though the Treasury Department and IRS published a substantial set of proposed changes in December 2024 (REG-116610-20) that would update contingent fee rules, update competency expectations to address the use of technology, and formally remove the obsolete registered tax return preparer provisions left over from the Loving litigation. Those changes have not yet been finalized, so practitioners should watch for a final rule rather than assume the proposed version is already in effect.

Why Circular 230 Matters

Circular 230 exists to protect three things at once: the integrity of the tax system, the interests of taxpayers who rely on paid representatives, and the credibility of the practitioner community itself.

For taxpayers, Circular 230 is a baseline assurance. When someone hires a CPA, EA, or attorney to handle an IRS audit, appeal, or collections matter, Circular 230 is what stands behind that relationship, requiring the practitioner to exercise due diligence, maintain competence, and deal honestly with both the client and the government.

For the profession, Circular 230 functions as a floor for ethical conduct that applies regardless of state licensing rules or individual firm policies. It gives the IRS a consistent basis for holding practitioners accountable and gives practitioners a clear, if sometimes demanding, standard to measure their own conduct against. It also gives the profession credibility. The ability to practice before the IRS carries real weight specifically because there is a federal regulatory structure behind it.

For individual practitioners, understanding Circular 230 is also simply a matter of self-protection. OPR discipline is separate from state-board discipline, but OPR’s authority is defined by federal law and Circular 230; thus, a CPA or EA can find themselves facing federal proceedings even when their state license is in good standing. Knowing where the lines are is the best way to avoid crossing them.

What Circular 230 Covers

Circular 230 is organized into subparts, and while the details run long, the structure is straightforward.

Subpart A: Who May practice, and How

This section defines what counts as "practice before the IRS" and identifies the categories of practitioners eligible to represent taxpayers: attorneys, CPAs, enrolled agents, enrolled retirement plan agents, and enrolled actuaries, along with more limited categories such as unenrolled return preparers acting under specific narrow rules. It also addresses the mechanics practitioners deal with constantly, such as the use of Form 8821 which authorizes disclosure of tax information but does not authorize representation.

Subpart B: Duties and Restrictions

This is the heart of Circular 230 for most day-to-day purposes. It covers:

Due diligence in preparing returns, giving advice, and making representations to the IRS
Standards for written advice, including what used to be handled through detailed "covered opinion" rules and is now addressed through a more general competent practice standard
Conflicts of interest and the conditions under which a practitioner may still represent a client despite one
Rules on contingent fees, which are permitted in limited circumstances but restricted in others
Prohibitions on practices such as unreasonably delaying matters before the IRS, charging unconscionable fees, or giving false or misleading information to the IRS
Requirements around returning client records and handling conflicts between firm obligations and client interests

Subpart C: Sanctions for Violation of the Regulations

This section identifies the sanctions OPR can impose, including censure, suspension, disbarment, monetary penalties, and disqualification of appraisers, along with the standards of incompetence and disreputable conduct that can trigger them.

Subpart D: Rules Applicable to Disciplinary Proceedings

This section covers how OPR actually investigates and prosecutes alleged violations, including the procedural rights a practitioner has throughout that process, such as notice, hearing procedures, and appeal.

Subpart E: General Provisions

This covers administrative matters, including how the regulations are to be construed and the availability of records related to disciplinary proceedings.

These subparts may update with the pending REG-116610-20. It would restructure into six subparts, adding a separate subpart for incompetence and disreputable conduct standards and one for appraiser disqualification, and shifting sanctions and disciplinary proceedings to Subpart E and F.

Practitioners do not need to memorize every section to stay compliant. What matters most in daily practice is a working knowledge of the due diligence standard, the rules around written advice and representations, contingent fee limitations, and the conduct that OPR treats as disreputable.

Who Has to Follow Circular 230

Circular 230 applies to anyone who practices before the IRS, a term that has a specific meaning under the regulations. It generally includes:

Attorneys in good standing who represent taxpayers in IRS matters
Certified Public Accountants in good standing who do the same
Enrolled Agents, who are licensed directly by the IRS specifically to represent taxpayers
Enrolled Retirement Plan Agents and Enrolled Actuaries, whose practice rights are limited to specific plan related matters
Certain other individuals permitted to represent taxpayers in narrow circumstances, such as unenrolled return preparers

It is worth being precise about scope here, because this is an area where practitioners sometimes assume broader coverage than actually exists. Following Loving v. IRS, Circular 230's strictest practitioner rules do not extend to unenrolled return preparers who merely prepare and sign returns without otherwise representing clients before the IRS in audits, appeals, or collections. That said, CPAs and EAs rarely operate in that narrow lane. If you advocate, negotiate, communicate with the IRS on a taxpayer’s behalf, submit materials in connection with an IRS matter, or otherwise make a presentation to the IRS, Circular 230 may apply.

What Happens if a Tax Professional Does Not Follow Circular 230?

Noncompliance with Circular 230 is handled through OPR, and the range of consequences is broader than many practitioners expect. Depending on the severity and nature of the violation, sanctions can include:

Reprimand or public censure, a formal notice of misconduct that does not remove the practitioner's ability to practice but becomes part of the disciplinary record
Suspension, which temporarily bars a practitioner from representing clients before the IRS for a defined period
Disbarment, which removes the ability to practice before the IRS indefinitely, subject to later petition for reinstatement
Monetary penalties, assessed against the practitioner, the practitioner's employer, or both in certain cases
Disqualification, a more targeted sanction sometimes applied to appraisers whose work fails to meet required standards

These sanctions are separate from state licensing consequences. A CPA who is suspended or disbarred by OPR can still face parallel action from their state board of accountancy, and vice versa. In the most serious cases involving fraud or willful misconduct, OPR can refer matters for criminal investigation, which carries the possibility of prosecution independent of any administrative sanction.

The practical takeaway is that Circular 230 violations rarely stay contained to a single consequence. A practitioner sanctioned by OPR is also likely dealing with reputational damage, potential state licensing exposure, and possible malpractice liability, all stemming from the same underlying conduct.

Staying Current on Circular 230

Because Circular 230 has a long history of periodic revision and currently has significant proposed changes working through the federal rulemaking process, staying current matters as much as understanding the baseline rules. Practitioners should watch for the final rule on REG-116610-20, since it would meaningfully update contingent fee standards, formally retire outdated registered tax return preparer language, and introduce a technological competence expectation that reflects how much practice before the IRS has changed since 2014.

Take the Next Step with CPE Courses from Becker

For EAs and CPAs, Circular 230 is not a compliance checkbox. It is the regulatory foundation that makes it possible to represent taxpayers before the IRS with credibility and legal standing. To learn more about Circular 230 and other essential topics, consider these CPE courses: