Challenges in Proving Reasonable Cause: Budde v. Commissioner Case

08.20.2025

Taxpayers often struggle to demonstrate reasonable cause to avoid penalties imposed by the IRS. The case Budde v. Commissioner examines the Tax Court’s recent findings on the evidentiary requirements for reasonable cause defenses under IRC § 6664(c). This case highlights the stringent standards upheld by the IRS and Tax Court when evaluating taxpayers’ defenses against accuracy-related penalties, particularly for negligence or substantial understatement of income tax.

 

The Tax Court emphasized the petitioner’s failure to substantiate claims of reasonable cause with sufficient documentation, leading to the rejection of the defense. Under IRC § 6664(c), taxpayers may avoid penalties by showing that their underpayment of tax was due to reasonable cause and that they acted in good faith. The court’s analysis in this case can be summarized as follows:

 

  1. Failure to Prove Reliance on Professional Advice

 The petitioner claimed to have relied on professional advice in preparing tax returns. However, the court found that there was insufficient evidence to demonstrate that such advice was received, let alone that it met the requirements under Neonatology Associates, P.A. v. Commissioner. For reliance to qualify as reasonable cause, the advice must be given by a competent and independent tax professional, based on all pertinent facts and circumstances. The absence of documentation, such as written advice or testimony from the preparer, led the court to discredit this defense.

 

  1. Lack of Diligence in Addressing Tax Obligations

 The court noted that the taxpayer failed to exercise ordinary care in understanding or complying with tax laws. While the taxpayer alleged that errors were inadvertent, the Tax Court concluded that negligence was evident, as the taxpayer did not provide evidence of efforts to verify the accuracy of returns or to correct errors after receiving IRS notices. Under IRC § 6662(a), this failure to exercise reasonable diligence was sufficient to uphold the penalties.

 

  1. Insufficient Documentation to Substantiate Claims

 The petitioner did not present adequate documentation to support the argument that errors were made in good faith. For instance, business records and communications with tax preparers were either incomplete or inconsistent with the claimed deductions and calculations. The court reiterated the importance of maintaining detailed records to substantiate positions taken on tax returns, especially when penalties are contested.

 

  1. Upholding the IRS Appeals Office Determination

 The Independent Office of Appeals had previously determined that the penalties should be collected via levy, based on the petitioner’s inability to provide evidence of reasonable cause. The Tax Court upheld this determination, emphasizing the taxpayer’s responsibility to produce clear and convincing evidence to challenge penalty assessments effectively.

 

Relevance to Tax Professionals

 This opinion is particularly relevant to tax professionals who assist clients in navigating penalty defenses. It underscores the necessity of maintaining robust documentation when advising clients, including written records of professional advice that address specific tax issues. For reasonable cause defenses under IRC § 6664(c), tax professionals should ensure their clients understand the importance of diligence in meeting tax obligations and the potential consequences of negligence.