Effective tax-rates

The Grey Shade has written an effective tax-rate calculator, based around the definition used in countless National and ACT press releases of "total amount of your gross income that you lose as a result of direct income tax and loss or abatement of means-tested cash benefits". But where National and ACT are only concerned with marginal tax rates - how much is taken out of the next dollar - Grey Shade is concerned with the overall rate. In practice, this means comparing how much of your income you get to keep with how much you would get to keep if you were on the dole or DPB.

Unfortunately, it doesn't factor in the effects of student loans.