Australian GST Calculator FAQ
How do I calculate GST in Australia?
For a standard taxable sale, add GST with GST = ex-GST price × 0.10 and inc-GST price = ex-GST price × 1.10. To remove GST from a GST-inclusive amount, use ex-GST price = inc-GST price / 1.10.
How do I add 10% GST to a price?
Enter the amount excluding GST, and the calculator adds 10% to show the GST amount and the final GST-inclusive total. This is useful when preparing invoices, quotes, and customer pricing.
How do I remove GST from a GST-inclusive amount?
Enter the GST-inclusive amount and divide by 1.10 to get the price excluding GST. The GST component is the difference between the inclusive and exclusive amounts.
What is the GST component of a GST-inclusive price?
For a standard 10% taxable sale in Australia, the GST component of a GST-inclusive amount is price / 11. For example, if the total is $110, the GST component is $10 and the ex-GST amount is $100.
What GST rate does this calculator use?
This calculator uses Australia's standard 10% GST rate for taxable sales. It is designed for the common case where GST applies normally to the sale.
Does GST apply to every sale in Australia?
No. Some sales are GST-free and some are input taxed. This calculator is for standard taxable sales where GST applies at 10%.
When do you need to register for GST in Australia?
Generally, businesses must register for GST when GST turnover reaches $75,000 or more. For non-profit organisations, the threshold is generally $150,000.
