Australia GST Calculator
Calculate Australian GST at the 10% rate. Add GST to a pre-tax price or extract the GST included in a total, with a clear breakdown.
What is this tool?
Australia has a single national Goods and Services Tax of 10%, charged on most goods and services. It is added to the pre-tax price; some items (fresh food, education, medical) are GST-free.How it works
Enter an amount and choose whether it already includes GST or not. The tool shows the GST and the price with or without it.Australia GST rate
Australia applies a single national Goods and Services Tax of 10% to most goods and services. Unlike many countries there are no separate state sales taxes, so the rate is the same in every state and territory.
Adding vs extracting GST
To add GST to a pre-tax price, multiply by 0.10. To find the GST inside a GST-inclusive total, divide the total by 11 — because the total is 110% of the pre-tax price, the GST is exactly 1/11 of it.
| Pre-tax price | GST (10%) | Total (incl. GST) |
|---|---|---|
| $100.00 | $10.00 | $110.00 |
| $250.00 | $25.00 | $275.00 |
| $1,000.00 | $100.00 | $1,100.00 |
How to use
- Enter the amount in AUD.
- Choose whether it includes GST.
- Press Calculate to see GST and the total.
Frequently Asked Questions
What is the GST rate?
Australia has a single 10% GST across the whole country; there are no state-level sales taxes.
What is GST-free?
Fresh food, most education and medical services, and some exports are GST-free.
How do I reverse GST out of a total?
Use the extract mode: the tool divides the total by 1.1 to recover the pre-tax price and the GST included.
This tool is for informational purposes only and does not constitute financial advice. Consult a qualified financial professional for advice specific to your situation.
Tips & Advice
GST is 1/11 of a GST-inclusive price, so a $110 total contains $10 of GST.Related Tools
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Sources & References
Last reviewed: September 2026.
- Australian Taxation Office – Goods and services tax (GST).
Limitations
Applies the single 10% national GST rate to one price. It does not decide whether a supply is taxable, GST-free or input-taxed — fresh food, education, medical services, some financial supplies and the sale of a going concern are GST-free or input-taxed and must not be grossed up here. Amounts are rounded to cents and assume the price is a completed tax invoice value; this is not a business activity statement tool.