Australia's Goods and Services Tax (GST) is a flat 10% broad-based tax on most goods and services sold or consumed in Australia, administered by the Australian Taxation Office (ATO) since 1 July 2000. The rate has never changed in 25 years. Use this calculator to add GST to a price, extract the GST ...
GST-INCLUSIVE TOTAL
A$1,100.00
GST component: A$100.00
EXCL. GST
A$1,000.00
GST (10%)
A$100.00
INCL. GST
A$1,100.00
ATO FORMULA
GST = A$1,000.00 × 0.10 = A$100.00
Total = A$1,000.00 + A$100.00 = A$1,100.00
Live diagram · updates as you type
Choose a mode: Add GST to get a GST-inclusive price, Extract GST to find the component inside a total, or Business (BAS) for net GST payable.
Enter your amount. For Add GST enter the price before tax. For Extract GST enter the total including GST. For Business enter your total taxable sales and purchases, both excluding GST.
The result updates instantly. The large black box shows your primary result — inclusive total, GST component, or net GST payable.
Use the Share button to copy your results as text, or the Embed button to add this calculator to your website.
A plumber charges a client A$880 for labour and parts. This price includes GST. To find the GST component: A$880 ÷ 11 = A$80 GST. The price excluding GST is A$880 − A$80 = A$800. The plumber must remit the A$80 to the ATO via their BAS, but can claim input tax credits on any GST paid on their business purchases — for example, if they bought A$220 of parts (incl. GST), the GST credit is A$220 ÷ 11 = A$20. Net GST payable = A$80 − A$20 = A$60.
| OPERATION | FORMULA | EXAMPLE (A$1,000 excl.) |
|---|---|---|
| Add GST | Price × 1.10 | $1,000 × 1.10 = $1,100 |
| GST amount (add) | Price × 0.10 | $1,000 × 0.10 = $100 |
| Extract GST | Incl. price ÷ 11 | $1,100 ÷ 11 = $100 |
| Price ex-GST (extract) | Incl. price × (10/11) | $1,100 × 10/11 = $1,000 |
| Net GST payable (BAS) | GST collected − GST credits | $1,000 − $400 = $600 |
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ATO rates: ato.gov.au · GST rate 10% effective 1 July 2000 · Last updated: 25 April 2026 · Formula verified by EagleCalculator team · Eagle-eyed accuracy for every calculation.