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
How much is GST in Australia?
GST is 10% on most goods and services in Australia.
How do I add 10% GST?
Multiply the GST-exclusive price by 1.10. $200 plus GST is $220.
How do I find the GST in an inclusive price?
The GST is one-eleventh of the total — divide the GST-inclusive price by 11. $220 ÷ 11 = $20.
How do I remove GST from a total?
Divide the inclusive total by 1.10 to get the price before GST. $220 ÷ 1.10 = $200.
When do I register for GST in Australia?
Once your business turnover reaches A$75,000 a year (lower thresholds apply to some activities).
GST Calculator (Australia)
Australia’s GST is 10% on most goods and services. This calculator adds GST, removes it from an inclusive total, or shows the GST content.
How much is GST in Australia?
The rate is 10%. To add GST, multiply the price by 1.10; the GST amount is the net price × 0.10.
GST from an inclusive price
The GST inside a GST-inclusive total is exactly one-eleventh of it (total ÷ 11), and the price without GST is the total ÷ 1.10.
| Task | Calculation | On $200 / $220 |
|---|---|---|
| Add 10% GST | net × 1.10 | $200 → $220 |
| GST amount | net × 0.10 | $20 |
| GST inside a total | total ÷ 11 | $220 → $20 |
| Remove GST | total ÷ 1.10 | $220 → $200 |
Businesses must register for GST once annual turnover reaches A$75,000. General information only, not tax advice.
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.