Free calculators for Australian sole traders
Five small tools for the questions every sole trader asks: how much tax will I owe, how much GST is in this amount, when is my BAS due, what should I charge per hour, and how do I put together a proper tax invoice. No sign-up, nothing to install, and you can email yourself the results.
Sole trader tax calculator
Estimate your income tax and Medicare levy for 2025-26, and how much to set aside each month.
Open toolGST calculator
Add or remove 10% GST from any amount, and work out the GST you owe for the quarter.
Open toolBAS due dates
Quarterly BAS due dates for this and next financial year, a live countdown, and a calendar file.
Open toolHourly rate calculator
Turn the income you want into the hourly and day rate you need to charge, ex-GST and inc-GST.
Open toolTax invoice generator
Build an ATO-compliant tax invoice with your ABN, logo and GST, then download it as a PDF. No account needed.
Open toolTired of doing this by hand?
FlowFi reads your bank statement, categorises every transaction, works out the GST and builds your BAS each quarter. Pro is $29 a month or $290 a year, with a 14-day free trial and no card needed.
Start 14-day free trial