Commissioner of Taxation v Dalco

The Commissioner of Taxation appealed to the High Court of Australia against a decision of the Federal Court, which had allowed the taxpayer's appeal by majority. The dispute concerned the Commissioner's assessments of the taxpayer's income for certain years, where the Commissioner had determined that the taxpayer had derived income beyond that disclosed in his returns. The taxpayer had disregarded corporate structures and entitlements, using them for convenience in lending money and claiming expenses, and had control of large sums of money without proper accounting or explanation.

The High Court was required to determine whether the Federal Court had erred in allowing the taxpayer's appeal against the Commissioner's default assessments. Specifically, the Court needed to consider the nature of default assessments made under sections 166 and 167 of the relevant Act, and the onus placed upon a taxpayer to demonstrate that such assessments are erroneous or excessive. The primary findings of fact from the initial hearing indicated that the taxpayer had failed to discharge this onus, having control of and benefiting from unexplained funds.

The High Court's reasoning focused on the principles governing default assessments. It was noted that such assessments involve the Commissioner making a judgment as to the amount upon which income tax ought to be levied. The Court considered the taxpayer's failure to provide adequate accounting or explanation for significant sums of money, and the disregard of corporate structures. The legal principle applied was that the onus rests on the taxpayer to prove that the Commissioner's assessment is excessive by identifying the sources of income and excluding all other sources.

The High Court allowed the Commissioner's appeal, setting aside the majority decision of the Federal Court. The Court found that the taxpayer had not discharged the onus of proving that the Commissioner's assessments were erroneous or excessive, given the unexplained funds and the disregard of corporate entitlements.