Tax law in Australia is a comprehensive and intricate field governed by multiple statutes, with the Income Tax Assessment Act 1936 and the Income Tax Assessment Act 1997 being the principal pieces of legislation. The Australian Taxation Office (ATO) administers tax law, overseeing the collection of taxes and ensuring compliance with tax obligations across individuals, businesses, and other entities.

Key areas of tax law include income tax, goods and services tax (GST), fringe benefits tax (FBT), capital gains tax (CGT), and superannuation tax. The income tax regime applies to both individuals and corporations, with a progressive rate structure for individuals and a flat rate for companies. GST, a broad-based consumption tax, applies to most goods and services, while FBT applies to non-cash benefits provided to employees. CGT is levied on the disposal of assets, and superannuation tax pertains to contributions and earnings within superannuation funds.

Recent developments in tax law have focused on international tax issues, such as base erosion and profit shifting (BEPS), the taxation of digital economy participants, and measures to enhance transparency and combat tax evasion. Additionally, ongoing reforms aim to simplify the tax system, reduce compliance costs, and ensure fair and equitable taxation.