Federal Commissioner of Taxation v Travelex Limited

The High Court of Australia considered an appeal by the Federal Commissioner of Taxation (the Commissioner) against a decision of the Full Court of the Federal Court of Australia concerning the operation of the Goods and Services Tax (GST) and the Commissioner's obligations regarding interest on overpayments. The dispute arose from an error in Travelex Limited's (Travelex) GST return for November 2009, which led to an incorrect calculation of its net amount and a purported amendment by the Commissioner that resulted in a credit to Travelex's Running Balance Account (RBA).

The central legal issues before the High Court were whether a mistaken balance in an RBA, arising from an erroneous amendment of a GST return, could constitute an RBA surplus within the meaning of Part IIB of the *Taxation Administration Act 1953* (Cth), and consequently, whether the Commissioner was obliged to pay interest on that surplus under the *Taxation (Interest on Overpayments and Early Payments) Act 1983* (Cth).

The High Court reasoned that the Commissioner lacked the statutory authority to amend Travelex's GST return in the manner undertaken. The Court held that an RBA surplus, for the purposes of the relevant legislation, must arise from a lawful determination or assessment of an overpayment. A credit to an RBA resulting from an unauthorised amendment and an erroneous calculation did not create a legally recognised surplus. Therefore, the Commissioner was not obliged to pay interest on a non-existent surplus.

The High Court allowed the appeal, setting aside the orders of the Full Court. It declared that no RBA surplus had arisen in relation to Travelex's GST tax period for November 2009, and accordingly, no interest was payable by the Commissioner to Travelex under the *Taxation (Interest on Overpayments and Early Payments) Act 1983* (Cth) in respect of that period. Travelex was ordered to pay the Commissioner's costs of the appeal.