Australian financial calculators,
with the assumptions left in.
Six focused tools for work, housing, retirement, borrowing, business and savings. Each page shows the formula, dated sources and editable assumptions used by the estimate.
Australian tools
Income Tax & HELP Calculator
FY 2026–27 resident tax, LITO, Medicare estimate, single-person MLS and HELP/STSL repayment.
Mortgage & Offset Calculator
Compare repayments, interest and payoff time with an offset account, growing offset balance and extra repayments.
Superannuation Calculator
Project an accumulation balance using FY 2026–27 SG, contributions tax, salary growth, fees, insurance and inflation.
Car Loan & Balloon Calculator
Estimate regular payments, fees, interest and the final balloon, with a no-balloon comparison.
Australian GST Calculator
Add 10% GST to a net amount or extract the 1/11 GST component from a GST-inclusive price.
Compound Interest Calculator
Model regular contributions, monthly compounding, growth and inflation-adjusted value in Australian dollars.
Local, not relabelled
HELP, Medicare, super, mortgage offset and balloon-payment inputs reflect Australian tasks and terminology.
Dates beside rules
Regulated figures show their financial year, verification date and next review trigger.
Formulas you can inspect
Read the Australian methodology for equations, sources and unsupported cases.