IRC 7491 Burden of Proof in Tax Court: Shifting the Burden to the IRS, Credible Evidence, and Penalty Burden Standards

The Historical Default: The Taxpayer Bears the Burden

For most of the history of federal tax litigation, the taxpayer bore the burden of proof on every disputed issue in Tax Court. The Commissioner's determination in a notice of deficiency carried a presumption of correctness. If a taxpayer could not prove, by a preponderance of the evidence, that the IRS was wrong, the IRS's position was sustained. This rule traces directly to foundational Tax Court precedent, including Welch v. Helvering, 290 U.S. 111 (1933), which established that the Commissioner's determination is presumed correct and that the taxpayer bears the burden of proving otherwise.

The practical consequence of this default was significant: in cases where the facts were disputed or the evidence was limited, the taxpayer faced an uphill fight regardless of the merits. Even when the IRS could not produce affirmative evidence to support its determination, it was entitled to win simply by standing on the presumption of correctness.

What IRC 7491 Changed

Congress enacted IRC 7491 as part of the IRS Restructuring and Reform Act of 1998 (RRA 98), Pub. L. 105-206. The provision applies to court proceedings commenced after July 22, 1998. Under IRC 7491(a)(1), if a taxpayer introduces "credible evidence" with respect to any factual issue relevant to determining the taxpayer's tax liability, the IRS bears the burden of proof with respect to that factual issue.

This was a significant statutory shift. For the first time, a taxpayer who met the conditions of IRC 7491 could force the IRS to carry the burden of proving its position, rather than simply resting on the presumption of correctness. The IRS could no longer win a factual dispute in Tax Court solely because the taxpayer failed to prove a negative.

That said, the shift has procedural and evidentiary prerequisites that limit its scope. IRC 7491 is not a blanket reversal of the traditional rule; it is a conditional mechanism that requires the taxpayer to earn the burden shift by satisfying all four conditions of IRC 7491(a)(2). A taxpayer who fails even one of those four conditions does not shift the burden, regardless of what evidence is produced.

For Tax Court procedure context, see our companion guide on filing a Tax Court petition and the Tax Court proceeding process.

Why the Burden Assignment Can Be Determinative

In most well-documented Tax Court cases, the burden of proof does not determine the outcome. A taxpayer with clear, contemporaneous records proving the item at issue will win on the merits regardless of which party technically bears the burden. Similarly, a taxpayer with no documentation will lose regardless.

The burden matters most in close cases: disputes over valuation, business purpose, intent, economic substance, or mixed questions of fact and law where the evidence on both sides is limited or ambiguous. In those cases, the party who bears the burden and cannot carry it will lose. For practitioners handling high-stakes disputes in these gray areas (including ERC eligibility disputes, business expense deduction disputes, and estate valuation controversies), the IRC 7491 burden shift can be the difference between a win and a loss.

Under IRC 7491(a)(1), the burden of proof shifts to the IRS only if the taxpayer introduces credible evidence AND satisfies all four conditions enumerated in IRC 7491(a)(2). Failure to satisfy any single condition forfeits the burden shift, regardless of the quality or volume of the credible evidence produced.

Condition 1: Substantiation Compliance (IRC 7491(a)(2)(A))

The substantiation requirement under IRC 7491(a)(2)(A) is item-specific. The taxpayer must have complied with every Code-imposed substantiation rule applicable to each item that is at issue. This means, for example, that a taxpayer claiming business meal deductions must have the written records required by IRC 274(d) (amount, time and place, business purpose, and business relationship of the persons entertained). A taxpayer claiming a charitable contribution of property valued over $500 must have a qualified appraisal meeting the requirements of IRC 170(f)(11).

Failure to comply with any applicable substantiation requirement for a particular item prevents the burden from shifting on that item, even if the taxpayer has produced substantial other evidence. The Tax Court may shift the burden on some items but not others within the same case.

Condition 2: Record Maintenance (IRC 7491(a)(2)(B))

The record maintenance requirement under IRC 7491(a)(2)(B) is distinct from the substantiation requirement. Substantiation compliance is about having the right type of records for specific deductions; record maintenance is about the general obligation to keep books and records throughout the tax year and retain them for as long as they may be relevant to the IRS. See also Treasury Regulation 1.6001-1, which imposes a general obligation on taxpayers to keep permanent books of account or records sufficient to establish the amount of gross income, deductions, and credits reported.

Records reconstructed after an examination begins are generally insufficient to satisfy the record maintenance condition. The requirement contemplates that records were created and maintained contemporaneously in the ordinary course of business.

Condition 3: Cooperation with Reasonable Requests (IRC 7491(a)(2)(B)-(C))

The cooperation requirement is the condition most frequently litigated in Tax Court. Under IRC 7491(a)(2)(B) and (C), the taxpayer must cooperate with all REASONABLE requests by the IRS for witnesses, information, documents, meetings, and interviews.

Two nuances matter here. First, the IRS's requests must be reasonable. The Tax Court evaluates whether the requests were reasonable in scope and timing; the IRS cannot manufacture non-cooperation by imposing unreasonably burdensome or harassing demands. Second, whether a taxpayer's response to an IRS request constitutes adequate cooperation is a fact-specific determination. Confirm the current standard in applicable Tax Court case law and at IRS.gov.

A critical practical point: the Tax Court has considered whether cooperation during the examination (before the notice of deficiency) is required to preserve the IRC 7491 burden shift for any subsequent Tax Court proceeding. Providing documents for the first time during Tax Court litigation that were not provided during the examination may not be sufficient to satisfy the cooperation condition, because the IRS can argue the taxpayer failed to cooperate when it mattered. Practitioners should ensure clients cooperate fully during the examination process, not just at the Tax Court stage. Confirm this nuance against applicable Tax Court case law and IRS.gov.

Condition 4: Net Worth Threshold for Corporate Taxpayers (IRC 7491(a)(2)(D))

Under IRC 7491(a)(2)(D), the burden shift is available to corporate taxpayers only if the corporation's net worth does not exceed $7,000,000 at the time the civil proceeding is commenced. This threshold was set by the RRA 98 and may have been subject to an inflation adjustment; confirm the current threshold at IRS.gov before relying on this figure.

The net worth threshold applies only to corporate taxpayers. Individual taxpayers and pass-through entities (partnerships, S corporations) are not subject to this condition. For small closely held corporations facing IRS examination, the net worth condition may be an asset rather than an obstacle, as many small corporations will fall below the threshold.

Even before reaching the four conditions of IRC 7491(a)(2), the taxpayer must introduce "credible evidence" on the factual issue for which the burden shift is sought. Under the statutory framework and applicable Tax Court case law, "credible evidence" means evidence that the court would find sufficient, if uncontroverted, to establish the taxpayer's position with respect to the factual issue. Confirm the current standard in applicable Tax Court case law and at IRS.gov.

This is a meaningful threshold, not a token one. The statutory language contemplates evidence with genuine probative value, not merely any evidence a taxpayer might introduce into the record.

What Qualifies as Credible Evidence

• Documentary evidence with probative value: Bank statements paired with business purpose records; signed contracts establishing the terms of a transaction; contemporaneous receipts for business expenses; payroll records and government orders for ERC claims; appraisals prepared by qualified appraisers meeting Code requirements; contemporaneous vehicle mileage logs.
• Expert testimony with factual foundation: An expert opinion on valuation, business purpose, or economic substance, grounded in independently verifiable facts and data, may constitute credible evidence on those issues.
• Corroborating third-party testimony: Testimony from individuals other than the taxpayer who can independently corroborate the facts at issue (for example, a business counterparty confirming the terms of a transaction) can contribute to a credible evidence showing.

What Does NOT Qualify as Credible Evidence

• Bare assertions: A taxpayer's statement, without documentary support, that a deduction was proper or that an item was for business does not constitute credible evidence under IRC 7491.
• Uncorroborated self-serving taxpayer testimony: The Tax Court has consistently held that the taxpayer's own testimony, standing alone on disputed factual issues, is generally insufficient to constitute credible evidence for purposes of IRC 7491. The standard requires more than the taxpayer saying what the taxpayer believes to be true.
• Reconstructed records without contemporaneous foundation: Records created after the fact, particularly after an examination has begun, that are not supported by contemporaneous underlying data generally do not constitute credible evidence for IRC 7491 purposes.

Under IRC 7491(c), in any court proceeding, the IRS has the burden of production with respect to any penalty, addition to tax, or additional amount imposed under the Code. This provision operates completely independently of the IRC 7491(a) burden shift for the underlying tax liability.

Critically: the IRC 7491(c) penalty burden applies even if the taxpayer has NOT produced credible evidence and has NOT satisfied the IRC 7491(a)(2) conditions for the underlying tax issues. The IRS always bears the burden of production for any penalty it asserts in a Tax Court proceeding. The taxpayer's failure to shift the burden on the underlying tax issue has no effect on the IRS's obligation to produce evidence supporting any penalty assertion.

Burden of Production vs. Burden of Persuasion for Penalties

The distinction between "burden of production" and "burden of persuasion" is critical to understanding how IRC 7491(c) works in practice. Under applicable Tax Court case law, "burden of production" means the IRS must come forward with sufficient evidence to make a prima facie case that the penalty applies. It is a lower standard than the burden of persuasion (the obligation to actually convince the court by a preponderance of the evidence). Confirm the distinction in applicable Tax Court case law and the Tax Court Rules of Practice and Procedure.

Once the IRS meets its burden of production on a penalty, the obligation does not end there. The burden of persuasion may shift back to the taxpayer to show that the penalty is not warranted (for example, by establishing reasonable cause and good faith under IRC 6664(c), or substantial authority under the relevant penalty provisions). The IRS is not required to disprove every available penalty defense merely by meeting its burden of production.

Key Penalties Where the IRC 7491(c) Burden Matters

• IRC 6662 accuracy-related penalty (20%): The IRS must produce evidence that the taxpayer's underpayment was attributable to negligence, disregard of rules or regulations, a substantial understatement of income tax, or another accuracy-related ground listed in IRC 6662(b). If the IRS cannot produce that evidence at trial, the penalty should be disallowed.
• IRC 6663 civil fraud penalty (75%): Note that IRC 7454(a) separately imposes a burden on the IRS to prove fraud by clear and convincing evidence (not merely by preponderance). IRC 7491(c) also imposes the burden of production for the fraud penalty under IRC 6663, but the higher clear-and-convincing-evidence standard of IRC 7454(a) is the governing standard for fraud. These provisions work together.
• IRC 6651 failure to file and failure to pay additions to tax: The IRS must produce evidence that the taxpayer failed to file a required return or pay a required tax, and that the failure was not due to reasonable cause and was not a willful neglect.
• Return preparer penalties (IRC 6694, 6695): In proceedings involving return preparer penalties, the IRS similarly bears the burden of production for the penalty assertion.

The Burden Comparison: Three Distinct Standards

The specific application of these burden standards in any Tax Court proceeding should be confirmed against applicable Tax Court case law and the Tax Court Rules of Practice and Procedure. The taxonomy above reflects the general framework; individual cases may present procedural nuances that affect which party bears which burden on a particular issue.

The IRS's large-scale Employee Retention Credit (ERC) enforcement initiative has produced tens of thousands of examinations and, increasingly, Tax Court proceedings. IRC 7491 is directly relevant to practitioners defending ERC claims in this enforcement environment. All ERC eligibility criteria, qualification standards, and current IRS enforcement positions discussed in this section should be confirmed at IRS.gov and in current IRS guidance, including IRS Notice 2021-20 and any subsequent published guidance, as the ERC rules and IRS enforcement posture are actively evolving.

For a comprehensive guide to ERC audit defense mechanics, including examination procedures and IRS disallowance strategies, see our companion guide on the ERC audit defense and OBBBA practitioner guide. For IRS examination procedure background, see our guides on IRS correspondence examinations and IRS field office examinations.

The IRS's Position and the IRC 7491 Opportunity

The IRS has generally taken the position that the taxpayer bears the burden of proving ERC eligibility: that the taxpayer was a qualifying employer, that the taxpayer experienced either a qualifying government order causing a full or partial suspension of operations, or a significant decline in gross receipts meeting the statutory and regulatory threshold (confirm the current definition at IRS.gov and in current IRS guidance, including IRS Notice 2021-20 and any subsequent guidance). Under the traditional Tax Court default, taxpayers defending ERC disallowances would bear that burden.

Under IRC 7491(a)(1), however, a taxpayer who introduces credible evidence of ERC eligibility and satisfies all four conditions of IRC 7491(a)(2) can shift the burden to the IRS to disprove eligibility. In practice, this means:

• A taxpayer who produces a qualifying government order (confirmed against applicable standards; confirm what constitutes a qualifying order at IRS.gov and in IRS Notice 2021-20 and any subsequent guidance), payroll records demonstrating qualified wages, and gross receipts calculations documenting a significant decline, and who cooperated fully with the IRS during examination, may be positioned to shift the burden of proving ERC ineligibility to the IRS.
• Once the burden shifts, the IRS must affirmatively produce evidence that the taxpayer did NOT qualify, rather than relying on the taxpayer's inability to prove eligibility.
• In cases where the IRS's disallowance was based on a legal position (for example, that a particular government order did not cause a "partial suspension" as a matter of law), IRC 7491(a) does not help the taxpayer on that legal question; the burden shift applies only to factual issues.

The Cooperation Trap in ERC Cases

The cooperation requirement under IRC 7491(a)(2)(B) and (C) is particularly important in ERC audit defense. Many ERC taxpayers, especially those who relied on third-party ERC promoters, failed to respond promptly or fully to IRS information requests during the examination. Some taxpayers did not produce government orders or payroll records when requested; others ignored IDRs (Information Document Requests) or produced incomplete responses.

A taxpayer who failed to cooperate during the examination may have forfeited the IRC 7491 burden shift for any subsequent Tax Court proceeding, even if the taxpayer later produces the missing records in litigation. The Tax Court has considered whether cooperation during the examination (before the notice of deficiency) is required to preserve the burden shift; confirm the current state of this issue in applicable Tax Court case law and at IRS.gov.

IRC 7491(c) and the ERC Penalty Burden

In ERC disallowance cases, the IRS has routinely asserted the IRC 6662 accuracy-related penalty (20%) in addition to the underlying tax liability. Under IRC 7491(c), the IRS bears the burden of production for that penalty even if the taxpayer has not satisfied the IRC 7491(a) conditions for the underlying ERC tax dispute. Practitioners should affirmatively require the IRS to meet its burden of production on penalty assertions in ERC cases, rather than conceding the penalty by default.

ERC Audit Defense Best Practices Under IRC 7491

• Assemble and preserve all government orders relied upon for the partial suspension analysis; confirm what constitutes a qualifying order at IRS.gov and in current IRS guidance, including IRS Notice 2021-20 and any subsequent guidance.
• Maintain all payroll records, Form 941 filings, and gross receipts calculations used to determine ERC eligibility and qualified wages.
• Respond promptly and fully to every IRS IDR during the examination, even if the request seems broad or burdensome; challenge only requests that are genuinely unreasonable through proper channels (appeals, Tax Court motion practice) rather than by non-response.
• Document every aspect of the client's cooperation during the examination so that the cooperation condition under IRC 7491(a)(2) can be established in any subsequent Tax Court proceeding.
• Challenge penalty assertions where the IRS has not produced evidence meeting the IRC 7491(c) burden of production standard.

IRC 7491 does not shift the burden with respect to issues of fraud. However, a separate statutory provision offers the taxpayer even stronger protection on fraud issues: under IRC 7454(a), in any Tax Court proceeding where the IRS asserts a civil fraud penalty under IRC 6663, the IRS bears the burden of proving fraud by clear and convincing evidence.

The clear-and-convincing standard under IRC 7454(a) is a higher standard than the preponderance-of-the-evidence standard that governs most Tax Court proceedings. The IRS cannot sustain a civil fraud penalty simply by showing that it is more likely than not that the taxpayer committed fraud; the IRS must produce evidence that clearly and convincingly establishes fraudulent intent.

Key points for practitioners:

• IRC 7454(a) is completely separate from IRC 7491. The taxpayer does not need to satisfy the IRC 7491(a)(2) conditions to benefit from the IRC 7454(a) fraud burden rule; it applies automatically whenever the IRS asserts a fraud penalty in Tax Court.
• IRC 7491(c) independently requires the IRS to bear the burden of production for any penalty, including the IRC 6663 fraud penalty. The two provisions work together: the IRS must first meet its burden of production under IRC 7491(c), and then must prove fraud by clear and convincing evidence under IRC 7454(a).
• Where the IRS cannot meet the clear-and-convincing standard for fraud, the taxpayer may still be subject to the accuracy-related penalty under IRC 6662 (which has its own burden of production requirement under IRC 7491(c)), but the fraud penalty itself should be disallowed.