Australia Discount and GST Calculator
Free Australia Discount and GST Calculator. Enter your figures and get the tax, net and total instantly, with the formula shown.
Standard rate on file: 10%
Your results
- Discount
- –
- Net amount
- –
- Tax
- –
- Total
- –
Estimates for planning only, not tax advice. Rates change; confirm with your tax authority or a qualified adviser.
How to use this calculator
- Enter your figures in the fields above.
- Check the rate. It is prefilled with the standard rate on file; change it if yours differs.
- Results update as you type. Press Reset to start over.
Formula used
Discount = [Price] × [Discount] ÷ 100
Net amount = [Price] − [Discount]
Tax = [Net amount] × [Tax rate] ÷ 100
Total = [Net amount] + [Tax]
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Frequently asked questions
How does the Australia Discount and GST Calculator work?
It applies the formula shown on this page to the figures you enter and updates the result instantly in your browser. Nothing you type is sent to a server.
Is the default rate always correct?
The default is the standard rate on file when the page was published. Reduced rates, local surcharges and exemptions can apply, so edit the rate field to match your situation.
Is this calculator free?
Yes. Every calculator on this site is free, needs no sign-up and works on phones, tablets and desktops.