Australia GST Calculator & Rate
Add Australian GST to a net price or take it out of a gross (tax-inclusive) amount, with Australia's verified standard rate of 10% preloaded. All math runs locally in your browser.
Australia GST calculator
Type an amount into any of the three boxes; the other two follow at the rate you pick.
GST = 100.00 × 10% = 10.00; gross = 100.00 + 10.00 = 110.00
Worked in whole cents: the tax is rounded to the nearest cent (half a cent goes up) and the other amount is the difference, so the boxes always add up. From a gross amount the tax is gross × rate ÷ (100 + rate); from a typed tax amount the net is worked back and your tax amount stays as typed. Your tax authority may set its own rounding rules for invoices.
How much is GST in Australia?
The standard GST rate in Australia is 10%. Other rates: 0% GST-free (basic food, health, education, exports). Source: business.gov.au (Australian Government), verified 2026-09-25.
GST is 10% of the value of a taxable supply (GST Act 1999 s 9-70). GST-free supplies (0%) are listed in Division 38: food (with exclusions such as hot food and prepared meals), health, education, child care, exports and others. Registration is required at a GST turnover of $75,000 or more (business.gov.au).
Australia GST worked examples
Add GST: gross = net × (1 + rate ÷ 100). Extract GST: tax = gross × rate ÷ (100 + rate), and net = gross − tax.
| Rate | Tax share of a gross price | Net 100 → tax / gross | Net 1,000 → tax / gross | Gross 100 → tax / net | Gross 1,000 → tax / net |
|---|---|---|---|---|---|
| 10% standard | 10/110 ≈ 9.0909% | 10.00 / 110.00 | 100.00 / 1,100.00 | 9.09 / 90.91 | 90.91 / 909.09 |
What each GST rate applies to in Australia
| Rate | Applies to | Source |
|---|---|---|
| 0% (GST-free) | Food (s 38-2), except excluded food under s 38-3 such as food for consumption on the premises where it is supplied, hot food and prepared meals | legislation.gov.au |
| 0% (GST-free) | Health (Subdivision 38-B), education (38-C) and child care (38-D) | legislation.gov.au |
| 0% (GST-free) | Exports and other cross-border supplies (38-E); also religious services, charities' activities, water, sewerage and drainage, going concerns, international transport, precious metals, farm land and other Division 38 items | legislation.gov.au |
Issuing a GST-compliant invoice?
Rates are only half of it — what must appear on the invoice (tax numbers, rate per line, reverse-charge wording for cross-border B2B) is covered in the VAT & GST invoicing guide, and the free VAT invoice generator produces a compliant PDF. The full rate dataset behind this page (42 jurisdictions, source per row) is downloadable: CSV · JSON (CC BY 4.0).
Australia GST FAQ
What is the GST rate in Australia in 2026?
The standard GST rate in Australia is 10%. Other rates: 0% GST-free (basic food, health, education, exports). Source: business.gov.au (Australian Government), verified 2026-09-25. Rates change, so confirm against the linked source before filing anything.
How do I add GST to a net price?
Multiply the net amount by (1 + rate ÷ 100). At 10%, a net price of 100.00 becomes 110.00 gross, of which 10.00 is GST. The calculator on this page does it with Australia's verified rates preloaded.
How do I work out the GST included in a gross price?
Multiply the gross (tax-inclusive) amount by rate ÷ (100 + rate), then subtract the result to get the net price. At 10% the share is 10/110 (about 9.0909%): a gross price of 100.00 contains 9.09 GST and 90.91 net. Type the gross amount into the calculator's gross box to do this for any amount.
Where does this rate come from?
Every rate in our dataset cites the source it was checked against. For Australia, that is business.gov.au (Australian Government) (linked on this page), verified on 2026-09-25. The full 42-jurisdiction dataset is downloadable under CC BY 4.0, and every verification pass is logged in our public changelog.
Not tax advice. Rates and rules change; the verification date above tells you when we last confirmed this figure, not that it is still current today. Confirm against the linked official source before filing or invoicing.