Commissioner of Taxation v BHP Billiton Limited

The High Court of Australia considered a dispute between the Commissioner of Taxation and BHP Billiton Limited concerning the deductibility of certain foreign tax payments. The core of the disagreement revolved around whether payments made by BHP Billiton to the United States Internal Revenue Service (IRS) constituted income tax for the purposes of section 80 of the *Income Tax Assessment Act 1936* (Cth) (the Act), which allows for the deduction of income tax paid to a country with which Australia has a double tax agreement.

The primary legal issue before the Court was whether the payments made by BHP Billiton to the IRS were properly characterised as "income tax" within the meaning of the Act, notwithstanding that they were made under a settlement agreement to resolve a dispute regarding the characterisation of certain income. Specifically, the Court had to determine if the payments, made to avoid further litigation and potential penalties, retained their character as income tax or if they were more akin to penalties or a compromise of a dispute.

The High Court, by majority, held that the payments made by BHP Billiton to the IRS were indeed income tax for the purposes of section 80 of the Act. The Court reasoned that the payments were made in satisfaction of a liability that arose under the United States' income tax laws, even though the precise amount was subject to negotiation and settlement. The critical factor was that the underlying liability was for income tax, and the settlement merely resolved the quantum of that liability. The Court distinguished between payments that are penalties in nature and those that are made to discharge an income tax liability, finding that the latter applied in this instance. The appeal was allowed, and the Commissioner's appeal was dismissed.