Section 6751(b) supervisor approval defense: how the procedural penalty defense actually works

The IRC §6751(b) supervisor approval requirement provides one of the most procedural defenses available against IRS penalties. The provision, enacted as part of the IRS Restructuring and Reform Act of 1998, requires that "no penalty under this title shall be assessed unless the initial determination of such assessment is personally approved (in writing) by the immediate supervisor of the individual making such determination or such higher level official as the Secretary may designate." The provision creates a procedural prerequisite to penalty assessment, without proper written supervisor approval at the appropriate time, the penalty cannot be assessed, providing a defense applicable across many penalty categories regardless of whether the underlying basis for the penalty would otherwise support assessment.

Per §6751(b)(1), the requirement applies to "any penalty" assessed under Title 26, with specific exceptions in §6751(b)(2) for:

• Penalties under §6651 (failure to file/pay)
• Penalties under §6654 (failure to pay estimated tax, individuals)
• Penalties under §6655 (failure to pay estimated tax, corporations)
• Penalties "automatically calculated through electronic means"

This means the supervisor approval defense applies to most penalties EXCEPT failure-to-file/pay, estimated tax penalties, and automatically calculated penalties.

• Accuracy-related penalty under §6662
• Fraud penalty under §6663
• Information return penalties under §§6721-6724
• Trust fund recovery penalty under §6672
• Various international information return penalties

The framework has been shaped by recent Tax Court and federal appellate decisions clarifying the timing requirements and the procedural specifics. The Second Circuit's decision in Chai v. Commissioner, 851 F.3d 190 (2d Cir. 2017), the Tax Court's decisions in Graev v. Commissioner (Graev III), 149 T.C. 485 (2017), and various subsequent decisions including Belair Woods, LLC v. Commissioner, 154 T.C. 1 (2020) have established that the supervisor approval must occur before the IRS first communicates the proposed penalty to the taxpayer in writing. This substantially expands taxpayer protection by establishing specific timing requirements rather than allowing IRS to obtain approval after taxpayer communication. The IRS bears the burden of producing evidence of compliance with §6751(b) under §7491(c), meaning the IRS must affirmatively prove supervisor approval, not merely claim it.

This is how the §6751(b) supervisor approval defense actually works, the scope of penalties covered, the timing requirements established by case law, the procedural framework for asserting the defense, and the strategic considerations for taxpayers using §6751(b) as a procedural defense to IRS penalty assessment.

What does Section 6751(b) require?

Section 6751(b) requires that before assessing most IRS penalties, the immediate supervisor of the IRS employee who initially determined the penalty must personally approve the assessment in writing. The statute applies to nearly all Title 26 penalties except failure-to-file/pay, estimated tax penalties, and those automatically calculated through electronic means.

Per IRC §6751(b)(1):

"No penalty under this title shall be assessed unless the initial determination of such assessment is personally approved (in writing) by the immediate supervisor of the individual making such determination or such higher level official as the Secretary may designate."

1. "No penalty under this title shall be assessed":

• Restriction on assessment (not determination or proposal)

• "Title" = Title 26 (Internal Revenue Code)

• Direct supervisor of decision-maker

• Or higher-level designated official

Per §6751(b)(2):

• Failure-to-file penalty (5%/month, max 25%)
• Failure-to-pay penalty (0.5%/month)

Penalties subject to §6751(b)

When must IRS supervisor approval occur under Section 6751(b)?

Under Chai v. Commissioner, Graev III, and Belair Woods, supervisor approval must be obtained before the IRS first communicates the proposed penalty to the taxpayer in writing. The IRS bears the burden of proving compliance under Section 7491(c). Approval obtained after the first formal written communication to the taxpayer is untimely and invalidates the penalty.

Chai v. Commissioner (Second Circuit 2017)

Chai v. Commissioner, 851 F.3d 190 (2d Cir. 2017):

• §6751(b) requires supervisor approval BEFORE first formal communication

• "Initial determination" = first written communication advising taxpayer that penalties will be proposed

• "Initial determination" interpreted by reference to first written notice to taxpayer

• Supervisor approval BEFORE that communication required

Graev v. Commissioner (Graev III, Tax Court 2017)

Graev v. Commissioner (Graev III), 149 T.C. 485 (2017):

• Tax Court adopts Chai timing framework
• IRS must show supervisor approval before first formal communication

Belair Woods, LLC v. Commissioner (2020)

Belair Woods, LLC v. Commissioner, 154 T.C. 1 (2020):

• Initial determination occurs at time of first formal communication
• Not earlier internal IRS process

Per IRC §7491(c):

IRS bears burden of producing evidence of compliance with §6751(b):

Graev v. Commissioner (Graev II), 147 T.C. 460 (2016), predecessor decision.

223 (2019)](https://www.ustaxcourt.gov/):

23 (2020)](https://www.ustaxcourt.gov/):

Laidlaw's Harley Davidson v. Commissioner, 154 T.C. 68 (2020):

What constitutes the "initial determination" under Section 6751(b)?

The "initial determination" is the first formal written communication from the IRS to the taxpayer proposing or advising of a penalty. Common examples include a Letter 950 (30-day letter), a Notice of Deficiency (90-day letter), or a Notice of Proposed Adjustment. Internal IRS deliberations and preliminary documents do not constitute the initial determination.

Letter 950 (30-day letter): first formal communication for many audits:

Notice of Deficiency (90-day letter): formal communication:

• Form 5278 (proposed audit adjustments)
• Form 4549 (income tax examination changes)

Which IRS penalties require Section 6751(b) supervisor approval?

Section 6751(b) applies to the accuracy-related penalty (Section 6662), fraud penalty (Section 6663), information return penalties (Sections 6721-6724), trust fund recovery penalty (Section 6672), international information return penalties, and preparer/promoter penalties. It does not apply to failure-to-file/pay penalties, estimated tax penalties, or automatically calculated penalties.

Accuracy-related penalty (§6662)

Combined with reasonable cause:

International information return penalties

Combined with Voluntary Disclosure Practice:

Information return penalties (§§6721-6722)

• Up to $310 per failure (2026 amounts)
• Substantially higher for intentional disregard

How do you assert a Section 6751(b) defense?

Taxpayers assert the Section 6751(b) defense most commonly through a Tax Court petition challenging a notice of deficiency, but also through IRS Appeals, refund claims in the Court of Federal Claims or district court, or at a Collection Due Process hearing. The IRS bears the burden of producing evidence of compliance, so taxpayers should request the administrative file early.

Per §7491(c):

What are the strategic considerations for a Section 6751(b) defense?

Taxpayers should raise the Section 6751(b) defense in virtually every penalty case where the penalty is not exempt. Key steps include requesting the IRS administrative file early, identifying the first formal written communication precisely, coordinating with reasonable cause and other substantive defenses, and engaging qualified tax counsel experienced in Tax Court practice.

Coordinate with reasonable cause defense. Multiple defenses:

Address statutory exceptions carefully:

• §6651 (failure to file/pay): No §6751(b) protection
• §6654-6655 (estimated tax): No §6751(b) protection
• Automatic calculation: No §6751(b) protection

Address audit reconsideration timing:

Coordinate with federal tax lien framework:

Plan for installment agreement coordination:

Address Offer in Compromise coordination:

Plan for Collection Due Process coordination:

Address substitute for return situations:

Plan for §72(t) early withdrawal coordination:

• Most states have separate penalty frameworks
• §6751(b) generally only applies to federal

Coordinate with trust fund recovery penalty framework:

For taxpayers facing IRS penalties, the §6751(b) supervisor approval defense provides one of the most powerful procedural defenses available, applicable to most penalties EXCEPT the exceptions (failure-to-file/pay under §6651, estimated tax under §§6654-6655, and automatically calculated penalties). The recent case law including Chai v. Commissioner, Graev III, and Belair Woods has established that the supervisor approval must occur before the IRS first communicates the proposed penalty to the taxpayer in writing, with the IRS bearing the burden of producing evidence of compliance under §7491(c). The procedural protection, combined with the burden-shifting framework, provides meaningful pathways to penalty defense even when the underlying basis for the penalty would otherwise support assessment. The work for taxpayers is in identifying penalty categories covered by §6751(b), requesting the IRS administrative file early in the procedural process, identifying the "initial determination" timing precisely (typically the first written formal communication to taxpayer), engaging qualified tax counsel familiar with §6751(b) jurisprudence and Tax Court practice, coordinating §6751(b) defense with reasonable cause and other defenses, and pursuing the procedural protection through Tax Court, Appeals office, refund claims, or Collection Due Process hearings as appropriate. For taxpayers with penalty exposure, the framework provides meaningful relief opportunities that should be raised in every penalty defense situation regardless of defense strength, given the procedural protection and the IRS documentation burden under the current §6751(b) jurisprudence.