What's Not Counted Here
This calculator doesn't include stamp duty on property (~$32K on a median Perth home), payroll tax passed on by employers, corporate tax embedded in prices, or land tax. The real number is higher still.
Australia vs The World
Australia's tax-to-GDP ratio is 30.2% vs the OECD average of 33.7%. But Norway — a comparable resource-rich nation — pays citizens a direct dividend from resource revenues through a sovereign wealth fund worth over USD $1.7 trillion.
The GST You Don't See
GST is embedded in every price. You don't see it as a separate line at the supermarket — but approximately 47% of everything you spend includes a 10% tax paid silently to the government.
The Insurance Tax-on-Tax
In WA, insurance stamp duty is calculated on the GST-inclusive premium — meaning you pay tax on the tax. The combined effective rate on your base insurance cost is 21%, not 10%.