Most taxpayers assume that what they tell their CPA or tax attorney stays confidential. That assumption is often wrong. Three separate protections can shield tax communications. Each has different rules, and each fails in ways that surprise people. The three protections are the attorney-client privilege, the work product doctrine, and the tax practitioner privilege under I.R.C. section 7525. Understanding where each one ends matters most when the IRS comes calling, because the government routinely tests these boundaries in audits, summons enforcement, and criminal investigations.
Here is the short version. The attorney-client privilege is the strongest protection, but it does not cover tax return preparation, and it is easily waived, most often by sharing the advice with someone outside the attorney-client relationship. The work product doctrine protects materials prepared because of anticipated litigation, not communications merely because they contain legal advice. The practitioner privilege under I.R.C. section 7525 is the weakest of the three. It does not apply in criminal matters, in state proceedings, or to written communications promoting tax shelters. And the Kovel agreement, often described as the fix for the accountant problem, is a far narrower tool than its reputation suggests. If confidentiality matters to you, the structure of the engagement matters more than the substance of the conversation.
The Attorney-Client Privilege in Tax Matters
The attorney-client privilege protects confidential communications between a client and an attorney made for the purpose of obtaining or providing legal advice. The Supreme Court has called it the oldest of the privileges for confidential communications known to the common law. Upjohn Co. v. United States, 449 U.S. 383 (1981). In the tax context, the privilege can apply in IRS examinations, administrative proceedings, civil litigation, and criminal investigations, provided the traditional elements are satisfied.
The privilege protects communications, not facts. You can be compelled to disclose what happened even if you already told your lawyer what happened. The privilege prevents the government from asking what you told your lawyer or what your lawyer told you; it does not make the underlying events undiscoverable.
The protection begins earlier than many people realize. The privilege attaches to an initial consultation with a lawyer you are considering hiring, even if you never sign an engagement letter and never pay a fee. The Ninth Circuit has held that communications from prospective clients seeking legal representation are privileged. Barton v. United States District Court, 410 F.3d 1104 (9th Cir. 2005). California law is explicit on the same point. The Evidence Code defines a client to include anyone who consults a lawyer for the purpose of retaining the lawyer or securing legal advice. Cal. Evid. Code section 951. What the privilege cannot do is reach backward to conversations you had with nonlawyers before you picked up the phone.
In the corporate setting, the privilege is not limited to conversations with senior management. Under Upjohn, communications between employees and counsel may be privileged when the employees, acting within the scope of their duties, communicate with counsel so the organization can obtain legal advice, and the communications are kept confidential. Courts treat these as guiding factors rather than a rigid checklist.
Which Privilege Law Governs
Privilege is not one body of law. It is a choice-of-law question, and the answer depends on the forum. Federal common-law privilege principles generally govern federal tax examinations, summons enforcement, Tax Court litigation, and federal criminal tax matters. In federal court, Federal Rule of Evidence 501 supplies the governing framework, and it directs courts to apply state privilege law to claims and defenses for which state law supplies the rule of decision. The federal cases discussed in this article control in federal tax settings. In state proceedings, state privilege law governs.
For California taxpayers, this matters. In a Franchise Tax Board audit, a California Department of Tax and Fee Administration dispute, or California litigation, the governing privilege is California’s statutory lawyer-client privilege. Cal. Evid. Code sections 950 to 962. The California privilege is in some respects more protective than its federal counterpart. The proponent must still establish that the communication was made in the course of an attorney-client relationship, and business advice does not become privileged merely because a lawyer delivered it. But once a communication qualifies, the California Supreme Court has held that the privilege attaches to the communication as a whole, not just the portions containing legal advice, and that a court may not order disclosure of the communication, even for in camera review, to test the privilege claim. Costco Wholesale Corp. v. Superior Court, 47 Cal. 4th 725 (2009); Cal. Evid. Code section 915. California does not apply the federal dual-purpose methodology that parses qualifying communications line by line.
The practical consequence cuts both ways. A tax attorney’s advice can be protected in both forums, though the scope of the protection differs. A CPA’s advice is protected in neither a state proceeding nor a criminal matter under section 7525, because the statute is federal, civil, and narrow, and California law gives accountants no evidentiary privilege of their own.
California’s Tax Return Privilege
California also recognizes a privilege the federal system does not. In California civil litigation, the tax return itself is privileged against compelled disclosure. The California Supreme Court implied the privilege from the statutes that make it a crime for tax officials to disclose returns, reasoning that confidentiality encourages full and truthful reporting. Webb v. Standard Oil Co., 49 Cal. 2d 509 (1957). The court reaffirmed the privilege decades later and confirmed that it covers both state and federal returns in California proceedings. Schnabel v. Superior Court, 5 Cal. 4th 704 (1993).
The privilege has real limits, in keeping with the theme of this article. It yields in three situations, when the taxpayer waives it, when the gravamen of the taxpayer’s own lawsuit is inconsistent with asserting it, and when a legislatively declared public policy outweighs it. It protects only the return and information integral to the return. The underlying records, including checkbooks, journals, and ledgers, remain discoverable.
Most importantly, know what this privilege is for. It shields your returns from an opposing party in California civil litigation, such as a business dispute, a divorce, or a contract case. It generally does not operate to prevent a taxing authority from obtaining returns and return information relevant to administering the tax laws, and federal courts hearing federal claims generally do not apply it either. It is a discovery shield against private litigants, not a defense to a tax authority.
The Work Product Doctrine
The work product doctrine is a different animal. It protects documents and tangible materials prepared in anticipation of litigation, whether prepared by an attorney or by another representative of the party. The doctrine originated in Hickman v. Taylor, 329 U.S. 495 (1947), and is now codified in Federal Rule of Civil Procedure 26(b)(3).
Work product reaches materials the attorney-client privilege never touches. Memoranda, interview notes, chronologies, and legal analyses prepared because of anticipated litigation can all qualify, even if they were never communicated to the client. The doctrine gives its strongest protection to opinion work product, meaning the attorney’s mental impressions, legal theories, and strategy. Courts rarely order that material produced.
The controlling test in the Ninth Circuit asks whether, in light of the nature of the document and the factual situation, it can fairly be said that the document was prepared because of the prospect of litigation. In re Grand Jury Subpoena (Mark Torf), 357 F.3d 900 (9th Cir. 2004). Under that test, a dual-purpose document can qualify even if it also serves a business purpose, an approach the Second Circuit adopted in United States v. Adlman, 134 F.3d 1194 (2d Cir. 1998), and most circuits now follow. As discussed below, the test still has real limits in the tax world.
The Tax Practitioner Privilege Under I.R.C. Section 7525
There is no common-law accountant-client privilege. The Supreme Court said so directly in Couch v. United States, 409 U.S. 322 (1973), and confirmed in United States v. Arthur Young & Co., 465 U.S. 805 (1984), that accountants have no work product immunity of their own. What federally authorized tax practitioners have instead is a statute.
I.R.C. section 7525 creates the federally authorized tax practitioner privilege, commonly called the CPA privilege. It extends the common-law protections of the attorney-client privilege to tax-advice communications between a taxpayer and a federally authorized tax practitioner, a category that includes CPAs and enrolled agents authorized to practice before the IRS. The statute sounds broad. It is not. The privilege applies only to tax advice, only in noncriminal tax matters before the IRS, and only in noncriminal tax proceedings in federal court brought by or against the United States. Because section 7525 borrows the attorney-client privilege, it also inherits every limitation of that privilege. It therefore does not protect communications made principally to prepare a return or information intended to be disclosed on one.
Kovel Agreements Are Narrower Than People Think
Practitioners often present the Kovel agreement as the answer to the accountant problem. It is not an answer. It is a narrow exception, and courts have enforced its boundaries strictly for more than sixty years.
The doctrine comes from United States v. Kovel, 296 F.2d 918 (2d Cir. 1961), where the Second Circuit held that the attorney-client privilege can cover an accountant retained by a lawyer to help the lawyer understand the client’s financial affairs, in the same way the privilege covers an interpreter translating a foreign language. The interpreter analogy defines the doctrine’s boundaries. The controlling question is whether the accountant’s assistance enables the lawyer to understand the client and give legal advice. Ordinary accounting work, independent valuation, and return preparation fall outside it, however useful they are to the client.
The case law shows how little survives that test. The Second Circuit itself refused to extend the privilege to a lawyer’s conversations with an investment banker, holding that the privilege protects communications between the client and the lawyer, not information the lawyer gathers from third parties, however useful to the legal advice. United States v. Ackert, 169 F.3d 136 (2d Cir. 1999). The Ninth Circuit held that communications with an appraiser retained by the taxpayer’s attorney were not privileged because the appraiser was hired to prepare an appraisal for a return, not to help the lawyer interpret anything. United States v. Richey, 632 F.3d 559 (9th Cir. 2011). That is the controlling approach for California taxpayers.
Even a perfectly structured Kovel engagement, in which the attorney retains the accountant in writing, directs the work, pays the bills, and keeps a separate file, protects only one thing. It protects communications made to help the lawyer advise the client. It does not protect the underlying facts. It does not protect the accountant’s preexisting knowledge or anything learned before the engagement began. It does not protect work that resembles return preparation or ordinary accounting. Filing a return can waive the protection as to workpapers revealing the substance of what the return discloses. And it does nothing to repair a waiver that has already happened. If the client has been emailing the CPA about the problem for months, a later Kovel engagement cannot retroactively create attorney-client privilege over those earlier communications. Whatever protection they have, if any, is whatever section 7525 or another doctrine gave them when they were made.
Treat Kovel as a limited tool for a specific situation, a lawyer who genuinely needs accounting expertise to advise a client in a sensitive matter, with the accountant engaged before the sensitive communications occur. Anyone relying on it as a general confidentiality strategy is relying on a doctrine that courts construe narrowly.
When the Privilege Fails
This is where taxpayers get hurt. Each of the three protections has well-litigated failure modes, and the IRS knows all of them.
Return Preparation Is Not Privileged
Courts treat routine tax return preparation as accounting work, not legal advice, even when a lawyer does it. In United States v. Frederick, 182 F.3d 496 (7th Cir. 1999), the Seventh Circuit held that documents used both to prepare returns and to represent clients in an audit were not privileged, reasoning that information conveyed for the purpose of being placed on a tax return is not confidential legal advice. A communication does not become privileged because the preparer happens to have a law license. The same rule applies under section 7525, which incorporates the attorney-client privilege’s limits. If the substance of your communication is destined for a return, assume it is discoverable.
Dual-purpose communications are especially dangerous for California taxpayers. The Ninth Circuit tests a communication that serves both legal and nonlegal purposes by asking whether the primary purpose was obtaining legal advice. In re Grand Jury, 23 F.4th 1088 (9th Cir. 2022). The Supreme Court granted review and then dismissed the case without deciding it, so the primary-purpose test remains the law in the Ninth Circuit. A communication in which tax-planning advice is mixed with return preparation can lose protection entirely if a court concludes that the compliance purpose predominated.
Filing the Return Can Waive the Privilege
Even a communication that starts out privileged can lose protection when the return is filed. Information a client gives an attorney with the intent that it appear on a tax return is not confidential in the first place because it was transmitted for the purpose of disclosure to the government. The Seventh Circuit put it bluntly. If the client transmitted the information so that it might be used on the tax return, the transmission destroys any expectation of confidentiality. United States v. Lawless, 709 F.2d 485 (7th Cir. 1983).
Filing can go further. In United States v. Cote, 456 F.2d 142 (8th Cir. 1972), the taxpayers’ attorney retained an accountant who prepared workpapers supporting amended returns. The court held that filing the amended returns disclosed the substance of the reported figures and waived the privilege as to the workpapers revealing that disclosed information, even though the workpapers might otherwise have been protected under a Kovel theory.
The waiver is not unlimited. It reaches communications and workpapers to the extent they reveal the substance or source of what the return discloses. It does not necessarily expose separate legal advice, counsel’s assessment of alternative positions never taken, or every document touching the same transaction. But the line is contested in practice, and the government will argue for the broad reading. Taxpayers weighing amended returns or voluntary disclosures should make the filing decision with that exposure in mind, and counsel should keep the advice file separate from the workpapers that support the reported numbers.
Disclosure to Third Parties Waives the Privilege
This is the most common way taxpayers destroy their own privilege, and it usually happens without anyone noticing. The attorney-client privilege depends on confidentiality. Disclosure to a person outside the attorney-client relationship ordinarily waives the privilege unless that person is reasonably necessary to facilitate the legal advice, acts as an agent of counsel or the client for that purpose, or is covered by another recognized doctrine such as common interest. The third party does not need to be adverse. A business partner, financial advisor, lender, co-investor, or longtime CPA is typically outside the protected circle.
The mechanics are unforgiving. Copying your CPA on an email to your tax attorney can waive the privilege for that email. Forwarding your lawyer’s advice memo to your bookkeeper can waive it. Discussing the advice in a meeting where a nonessential third party sits in the room can waive it.
Waiver ordinarily reaches the communication actually disclosed. Broader subject-matter waiver is the exception, reserved under Federal Rule of Evidence 502(a) for intentional disclosures where fairness requires that related undisclosed communications be considered together. That is most likely when a taxpayer selectively deploys favorable privileged material while withholding the unfavorable rest. The narrow scope of subject-matter waiver is cold comfort, though, because the communication actually disclosed is usually the one that mattered.
Ordinary financial records voluntarily placed in an accountant’s hands gain no protection from the accountant’s possession. The Supreme Court held that a taxpayer generally cannot invoke the Fifth Amendment to prevent an accountant from producing records in the accountant’s possession. Couch v. United States, 409 U.S. 322 (1973). Nor can a taxpayer disclose selectively. The Ninth Circuit has rejected the theory that a party can share privileged material with one government agency and still assert the privilege against everyone else. In re Pacific Pictures Corp., 679 F.3d 1121 (9th Cir. 2012).
Work product waiver runs on a different standard. Because the doctrine protects materials from adversaries rather than guaranteeing confidentiality generally, disclosure to a third party waives work product protection only when the disclosure is made to an adversary or is otherwise inconsistent with keeping the material from an adversary. The Ninth Circuit drew exactly this distinction in United States v. Sanmina Corp., 968 F.3d 1107 (9th Cir. 2020), holding that sharing attorney memoranda with a nonadversary can waive the attorney-client privilege without automatically waiving work product protection. The two waivers must be analyzed separately, and disclosure to an independent auditor may destroy the privilege even where some work product protection survives.
The practical rule remains strict. Keep privileged advice between the client and the lawyer, and bring anyone else inside the circle only deliberately, through a structure designed to preserve the protection. Every casual additional recipient is a waiver argument the IRS will make later.
The Crime-Fraud Exception
The privilege protects advice about past conduct. It does not protect communications made to further a crime or fraud. Clark v. United States, 289 U.S. 1 (1933). The client’s intent controls, so the exception can apply even when the lawyer is entirely innocent and unaware of the scheme.
The procedure is a two-step process. A court may review the communications in camera upon a threshold factual showing supporting a reasonable belief that review may reveal evidence of crime or fraud, but the government must still establish that the exception actually applies before anything is disclosed. United States v. Zolin, 491 U.S. 554 (1989).
In tax cases, the exception surfaces when the government contends that a taxpayer used an advisor’s services to conceal income, backdate documents, or paper over a sham transaction. Advice about how to defend past positions is protected. Assistance in committing the next violation is not.
Putting the Advice at Issue
A taxpayer who defends against penalties by claiming reliance on professional advice has put that advice in issue and waived the privilege as to it. This is the classic penalty-defense trap. Reasonable cause and good-faith reliance under I.R.C. section 6664(c) can be a complete defense to accuracy-related penalties, but asserting it opens the advice communications and related materials the government needs to test the defense. You cannot use the advice as a shield and simultaneously keep it secret.
The waiver ordinarily extends to what is necessary to evaluate the asserted reliance rather than to every paper the advisor ever touched. But the government will push for breadth, and courts decide the scope after the defense is raised. Before asserting reliance, the taxpayer and counsel should review the full file and assume that the relevant communications will be produced.
Work Product Fails for Ordinary-Course Documents
Documents prepared in the ordinary course of business are not work product, even if litigation with the IRS is a realistic possibility. The First Circuit, sitting en banc, held that a company’s tax-accrual workpapers were not protected because they were prepared to support financial statements, not for use in litigation. United States v. Textron Inc., 577 F.3d 21 (1st Cir. 2009).
The lesson generalizes. Risk assessments, reserve analyses, and memoranda that would have been created in substantially the same form regardless of any anticipated dispute usually receive no protection. If a document exists to satisfy auditors or regulators, do not count on withholding it from the IRS.
Section 7525 Fails in Criminal Matters
Section 7525 provides no protection in a criminal tax matter or proceeding. The statute by its terms applies only to noncriminal tax matters before the IRS and noncriminal tax proceedings in federal court, and because the limitation runs to the proceeding, protection available during a civil examination cannot be asserted once the matter is criminal.
If an examination is referred to IRS Criminal Investigation, or if a grand jury opens an inquiry, communications protected only by section 7525 lose their shield. The CPA can be subpoenaed and compelled to testify about what the client said unless some independent protection, such as a valid Kovel arrangement or work product, covers the communication. This is why experienced counsel treat any audit with fraud indicators, sometimes called an eggshell audit, as a matter for attorneys first.
Section 7525 Fails in State Proceedings
Section 7525 is a federal statute limited to federal tax proceedings. It provides no protection in state court or before state agencies. For California taxpayers, that means communications with a CPA carry no evidentiary privilege in a Franchise Tax Board or California Department of Tax and Fee Administration dispute. California does not recognize an accountant-client evidentiary privilege. A CPA’s statutory confidentiality obligations are professional duties, not privileges, and they yield to a subpoena.
Section 7525 Fails for Written Tax Shelter Communications
The statute expressly excludes written communications in connection with the promotion of participation in a tax shelter, and the term “tax shelter” is defined broadly to include any arrangement with a significant purpose of federal tax avoidance. Courts have enforced this exclusion and have also applied it alongside the rule that the identity of a client is generally not privileged at all. United States v. BDO Seidman, LLP, 337 F.3d 802 (7th Cir. 2003). Taxpayers who participated in promoted transactions should assume the paper trail with the promoting firm is discoverable.
The Kovel Agreement, Done Wrong
Beyond the doctrinal limits described above, a Kovel arrangement fails whenever the label does not match the substance. Courts look past the engagement letter to what the accountant actually did. If the accountant was really providing ordinary accounting services, preparing returns, or advising the client directly rather than helping the lawyer advise, the privilege never attaches.
Using the client’s longtime CPA under a Kovel agreement draws particular scrutiny because the government will argue that the CPA simply continued prior work under new letterhead. When that argument succeeds, the taxpayer is left worse off than expected, having shared sensitive information for months in the belief that it was protected.
Comparing the Three Protections
| Attorney-Client Privilege | Work Product Doctrine | I.R.C. Section 7525 | |
|---|---|---|---|
| What it protects | Confidential communications for legal advice | Materials prepared in anticipation of litigation | Tax-advice communications with a federally authorized practitioner |
| Criminal matters | Yes | Yes | No |
| State proceedings | Yes | Generally yes | No |
| Return preparation | No | No | No |
| Key failure modes | Waiver by disclosure, filing the return, crime-fraud, advice at issue | Ordinary-course documents, disclosure to adversaries | Criminal referral, state disputes, written shelter promotion, plus everything that defeats attorney-client privilege |
What This Means in Practice
The practical rules are simple to state. If a matter is sensitive, involves potential fraud indicators, or could become criminal, communications belong with a tax attorney from the start, before anything sensitive has been said to anyone else.
Keep privileged advice strictly between the client and the lawyer. Every unnecessary third party who sees it, including a CPA, auditor, lender, or family member outside a properly structured privileged relationship, is a waiver argument waiting to happen. If an accountant’s expertise is genuinely needed, the attorney can retain one under a Kovel agreement, but only for the narrow role the doctrine actually covers and only before the sensitive communications occur.
Never assume that anything said during return preparation is confidential. And before asserting a reliance-on-advice penalty defense, understand that the advice communications needed to test the defense will likely be produced.
These issues come up constantly in examinations. If you have received an audit notice, our guides on What Triggers an IRS Audit, What an IRS Audit Letter Means and How to Respond, and What Documents the IRS Asks For in an Audit explain what to expect. If the examination has already produced a proposed deficiency, see The IRS 90-Day Notice of Deficiency.
Frequently Asked Questions
Are my conversations with my CPA confidential?
Only in a narrow range of situations. I.R.C. section 7525 protects tax advice from a CPA or other federally authorized tax practitioner in noncriminal federal tax matters. It does not cover return preparation, criminal investigations, state tax disputes, or written communications promoting tax shelters.
Can the IRS force my CPA to testify against me?
Yes, in a criminal matter and in civil matters outside section 7525. If IRS Criminal Investigation or a grand jury issues a summons or subpoena, the CPA may be compelled to testify about communications that are not independently protected. A taxpayer also generally cannot invoke the Fifth Amendment to prevent an accountant from producing records in the accountant’s possession. Couch v. United States, 409 U.S. 322 (1973).
Is my tax return itself privileged?
It depends on who is asking and where. Against the IRS or the FTB, generally no. A filed return is disclosed to the government by design, information gathered to prepare it ordinarily is not privileged when conveyed for the purpose of disclosure, and filing may waive privilege as to workpapers revealing the substance of the reported figures. United States v. Frederick, 182 F.3d 496 (7th Cir. 1999); United States v. Cote, 456 F.2d 142 (8th Cir. 1972).
Against a private opposing party in California civil litigation, however, California recognizes a tax-return privilege that protects the return itself, subject to exceptions for waiver, inconsistent litigation positions, and overriding legislative policy. Webb v. Standard Oil Co., 49 Cal. 2d 509 (1957); Schnabel v. Superior Court, 5 Cal. 4th 704 (1993). The underlying financial records are not covered.
What is a Kovel arrangement, and will it protect my communications with my CPA?
It is an engagement in which a tax attorney retains an accountant to assist the attorney in providing legal advice. That arrangement can bring certain communications within the attorney-client privilege. United States v. Kovel, 296 F.2d 918 (2d Cir. 1961).
Do not overestimate it. The doctrine covers an accountant helping the lawyer provide legal advice. It does not protect underlying facts, earlier communications, or return-preparation work, and courts construe it narrowly. United States v. Richey, 632 F.3d 559 (9th Cir. 2011). It cannot retroactively create privilege over what you already told your CPA, and filing a return may waive protection as to materials revealing the substance of what was reported.
Does hiring a lawyer to prepare my return make it privileged?
No. Return preparation is treated as accounting work regardless of who performs it. The privilege attaches to legal advice, not to the preparer’s credentials.
Does the CPA privilege help me in a California FTB audit?
No. Section 7525 applies only in federal noncriminal tax matters, and California does not recognize an accountant-client evidentiary privilege. In a state dispute, the relevant protections are the attorney-client privilege and work product doctrine. California’s statutory lawyer-client privilege appears in Cal. Evid. Code sections 950 to 962.
If I claim I relied on my advisor to avoid penalties, what happens to the privilege?
You waive it as to the advice placed at issue. Asserting reasonable cause based on professional advice under I.R.C. section 6664(c) opens the communications and related materials the government needs to evaluate the defense. That trade may be worthwhile, but it should be made deliberately and only after reviewing the relevant file.
When should I involve a tax attorney instead of my CPA?
Whenever the matter could involve fraud indicators, unreported income, foreign accounts, a criminal referral, or significant litigation exposure. Unlike section 7525, the attorney-client privilege continues to protect qualifying communications in a criminal matter, and work product protection may also reach materials prepared because of anticipated litigation.
The privilege covers the first consultation with the lawyer, even before an engagement letter is signed. Barton v. United States District Court, 410 F.3d 1104 (9th Cir. 2005); Cal. Evid. Code section 951. What it cannot do is retroactively protect conversations you already had with your CPA or another person before counsel became involved.
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This article is for general information and is not legal advice. Privilege questions are fact-specific, and small structural details often determine whether a communication is protected. If you are facing an audit or investigation where confidentiality matters, speak with a tax attorney before speaking with anyone else.