[Tax Case] Can a taxpayer ask for penalty remission because of recklessness and the tax agent's involvement?

A recent case, Tilli and Commissioner of Taxation [2026] ARTA 80, has quickly become a useful authority for Administrative Review Tribunal (ART) taxation cases because of its concise explanation of the administrative penalty provisions and its reaffirmation that taxpayers must take active responsibility for the accuracy of information provided to the ATO, even where professional advisers are engaged.

No.1

Case Overview

The case concerned whether the taxpayer, Tilli, was liable for administrative penalties imposed by the Commissioner of Taxation under Division 284 of Schedule 1 to the Taxation Administration Act 1953 for making false or misleading statements in his tax affairs. The Commissioner assessed penalties on the basis that Tilli's conduct was reckless.

The applicant, Tilli, was the trustee of the Sciacca Family Trust and lodged income tax returns for the 2015, 2016 and 2017 income years. The returns disclosed relatively modest amounts of trust income and were prepared by a tax agent. However, following an audit, the Commissioner identified significant amounts of omitted assessable income. These omissions included:

• Rental income derived from trust-owned properties;

• Unexplained deposits into bank accounts;

• Cash amounts received from the applicant's husband; and

• Other amounts that were not properly disclosed in the returns.

The Commissioner concluded that the returns contained false or misleading statements and imposed administrative penalties under Division 284 of Schedule 1 to the Taxation Administration Act 1953 (Cth) (TAA). The penalties were assessed on the basis that the applicant's conduct amounted to recklessness.

The Commission determined that the taxpayer was liable for a shortfall penalty arising from making a false or misleading statement, calculated at a base penalty rate of 50% on the basis that the taxpayer behaved recklessly. The penalty was also subject to an uplift of 20% for the 2016 and 2017 income years due to the circumstances attracting the penalty being repeated in those years.

The applicant sought review in the Administrative Review Tribunal.

No.2

Applicant's Arguments

The applicant contended that:

• She lacked financial sophistication.

• She relied heavily upon her husband in relation to financial affairs.

• She relied on her tax agent to prepare and lodge returns.

• Any errors were inadvertent rather than reckless.

• Financial hardship and personal circumstances justified remission of the penalties.

The Tribunal noted that little evidence was produced to substantiate these assertions, and the applicant did not attend the hearing to give evidence or be cross-examined.

No.3

Tribunal's Reasoning

The Tribunal rejected the applicant's attempt to characterise the conduct as mere carelessness.

Several factors were important:

1. Significant Undisclosed Income

The amount of omitted income was substantial and arose from multiple sources rather than a single accounting mistake. The omissions were not isolated errors but formed part of a broader pattern of inaccurate reporting.

2. Reliance on a Tax Agent Was Insufficient

The Tribunal emphasised that engaging a tax agent does not automatically shield a taxpayer from penalties. A taxpayer remains responsible for ensuring that information supplied to the agent is accurate and complete. Simply signing and lodging returns without checking obvious inaccuracies may still amount to recklessness.

3. Lack of Evidence

The applicant's claims regarding limited financial knowledge, reliance on her husband and financial hardship were unsupported by documentary or oral evidence. The Tribunal found there was insufficient material to justify reducing the penalty classification or granting remission.

4. Remission Not Warranted

Although the Commissioner possesses a broad discretion to remit penalties, the Tribunal found no exceptional circumstances that would justify intervention. The applicant had not demonstrated why the ordinary operation of the penalty regime would produce an unfair outcome.

No.4

Decision

The Tribunal held that:

• The applicant was liable for administrative penalties.

• The conduct was properly characterised as recklessness, not merely failure to take reasonable care.

• The 50% base penalty rate was correctly imposed.

• No further remission should be granted.

Accordingly, the Tribunal affirmed the Commissioner's objection decision

No.5

Significance of the Decision

The case is significant because it provides a clear and accessible summary of the Division 284 administrative penalty regime and the distinction between:

Conduct	Penalty Rate
Reasonable care taken	No penalty
Failure to take reasonable care	25%
Recklessness	50%
Intentional disregard of the law	75%

The decision reinforces several practical principles:

• Taxpayers cannot avoid penalties merely by blaming their tax agent.

• Large unexplained omissions can support a finding of recklessness.

• The taxpayer bears the evidentiary burden in Tribunal proceedings.

• Financial hardship alone will rarely justify remission.

• Recklessness may be established even without deliberate dishonesty where there is serious indifference to the correctness of tax returns

  
  

References: Tilli and Commissioner of Taxation [2026] ARTA 80, The Tax Institute