Where these definitions come from
Pay terms come from the Fair Work system: the National Employment Standards, modern awards and enterprise agreements. Tax terms come from the ATO. Where the two use the same word differently, the definition here says which sense applies. Rates quoted are for the 2026-27 financial year and are listed with their sources on the official sources page, with the verification process set out in the methodology.
Definitions are general information, not personal tax or financial advice. The disclaimer sets out what the calculators on this site include and, more importantly, what they leave out.