Guides
These notes explain the calculations behind the tools. They are not personal advice.
- How Australian take-home pay is actually calculatedPAYG withholding on each pay, year-end tax, LITO and the Medicare levy.
- Why monthly rent is not weekly × 4The 52-week year, what property managers collect, and how to budget without a shortfall.
- Estimating the cost of running an applianceWatts, kilowatt-hours and why the supply charge does not belong in a kettle calculation.
- How GST works in AustraliaWhy adding GST is 10% and removing GST is 1/11.
- Understanding salary plus superThe difference between a salary plus SG and a package that includes super.
- How mortgage interest worksWhy early repayments are mostly interest, and how extra payments help.
- Understanding L/100 kmHow Australian fuel economy figures convert to kilometres per litre.
- How business days are countedWeekdays, public holidays, inclusive counts and state lists.