Barton v Deputy Commissioner of Taxation

The parties to this appeal were Mr. Barton and the Deputy Commissioner of Taxation. The dispute concerned the validity of assessments for income tax made against Mr. Barton for the years ended 30 June 1961, 1962 and 1963. The matter came before the High Court of Australia on appeal from the Supreme Court of New South Wales.

The central legal issue before the High Court was whether the Commissioner of Taxation had acted arbitrarily or capriciously in issuing amended assessments for income tax against Mr. Barton, thereby rendering those assessments invalid. Specifically, the court had to determine if the Commissioner's belief that the original assessments were incorrect, which underpinned the decision to issue amended assessments, was based on reasonable grounds or if it was formed without any proper consideration of the facts.

The High Court held that the Commissioner's power to amend assessments under section 170 of the *Income Tax Assessment Act 1936* (Cth) is not unfettered. While the Commissioner is not required to conduct a full judicial inquiry, the power must be exercised in good faith and not arbitrarily. The court found that the Commissioner's belief that the original assessments were incorrect was not formed arbitrarily, but rather on the basis of information available to him, including the taxpayer's own submissions and the nature of the transactions involved. The court affirmed that the Commissioner is entitled to rely on information provided by the taxpayer and to form a belief based on that information, even if that belief is later found to be mistaken.

The appeal was dismissed.