1. Overview of Australian PAYG Withholding
In Australia, employers withhold income tax from wages each pay period under the Pay As You Go (PAYG) withholding system administered by the Australian Taxation Office (ATO).
Every Australian worker submits a Tax File Number (TFN) Declaration upon starting employment, claiming or declining the $18,200 Tax-Free Threshold. Failure to quote a TFN subjects your entire earnings to the top marginal rate of 47% (45% tax + 2% Medicare).