Australia GST Calculator
Add GST to a net price or extract it from a gross amount at Australia's verified standard rate of 10% (reduced: 0% GST-free (basic food, health, education, exports)). All math runs locally in your browser.
GST 10% unchanged since 1 Jul 2000; reg threshold AUD 75,000. ATO site blocked WebFetch (403), so cited business.gov.au which states the 10%.
Breakdown
- Net amount
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- GST (—)
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- Gross amount
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How the math works
Add GST (forward): gross = net × (1 + rate ÷ 100)
Extract GST (reverse): net = gross ÷ (1 + rate ÷ 100)
Worked example at Australia's standard rate: net 100 × (1 + 10 ÷ 100) = 110.00 gross, of which 10.00 is GST.
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 standard GST rate in Australia?
10%, per business.gov.au (Australian Government) (verified 2026-06-12). Reduced rates: 0% GST-free (basic food, health, education, exports). Rates change — always 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). Reverse (extracting from a gross, tax-inclusive amount): divide by (1 + rate ÷ 100). The calculator on this page does both with Australia's verified rate preloaded.
Where does this rate come from?
Every rate in our dataset cites the source it was verified against — for Australia, that is business.gov.au (Australian Government) (linked on this page), checked on 2026-06-12. 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.