GST Calculator AU
Add or remove consumption tax and see the net and gross amounts.
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How it works
Adding tax multiplies the net price by the rate and adds it on. Removing tax works backwards from a tax-inclusive price to find the original net amount.
Gross = Net × (1 + rate); Net = Gross ÷ (1 + rate)Frequently asked questions
What is the GST rate in Australia?
The standard rate is 10%. Australia applies a single GST rate of 10% to most goods and services; some items such as basic food, most health and education are GST-free (0%).
How do I add GST to a price?
Multiply the net amount by 1.10. For example, A$100 plus 10% GST is A$110.
How do I remove GST from a total?
Divide the tax-inclusive total by 1.10. So A$110 ÷ 1.10 = A$100 before tax, and the GST portion is A$10.
Who has to register for GST?
A business must register for GST once its annual turnover reaches A$75,000 (A$150,000 for non-profits), and registration is optional below that.
How do I find the GST within a price that already includes it?
Divide the GST-inclusive total by 11. A A$110 price contains A$10 of GST.
What is GST-free?
Items taxed at 0%, such as basic food, most health, medical and education — no GST is added but businesses can still claim input credits.
How GST works in Australia
Australia charges GST at a standard rate of 10% on most goods and services. It is a consumption tax collected in stages: businesses add it to their sales and reclaim the GST they pay on purchases, so the cost ultimately falls on the final consumer.
Adding and removing GST
To add 10% GST, multiply the net price by 1.10 — so A$100 becomes A$110, of which A$10 is tax. To remove it from a tax-inclusive total, divide by 1.10: A$110 ÷ 1.10 = A$100 before tax.
Rates and registration
Australia applies a single GST rate of 10% to most goods and services; some items such as basic food, most health and education are GST-free (0%). A business must register for GST once its annual turnover reaches A$75,000 (A$150,000 for non-profits), and registration is optional below that.
Because the rate is a flat 10%, the GST contained in a tax-inclusive price is simply the total divided by 11. GST is reported to the ATO on a Business Activity Statement, with businesses claiming credits for the GST in their own purchases.
Results are estimates for general guidance in Australia and may not reflect the latest local rates, fees or rules. Check official sources before making decisions.