Calculate∑ What your result means
GST is a flat 10% tax applied to most goods and services in Australia, and can be added to a GST-exclusive price or extracted from a GST-inclusive price.
Australia GST Calculator
Add or extract 10% GST from an amount in seconds.
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Verified for 2026-27Methodology 2026-27.1 · reviewed 2026-08-08 · review by 2027-06-01
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Understand your result
Clear context for the values above.
Total amount
Total amount is included so you can interpret this estimate and make a better-informed comparison.
GST component
GST component is included so you can interpret this estimate and make a better-informed comparison.
Amount
Amount is included so you can interpret this estimate and make a better-informed comparison.
Calculation
Calculation is included so you can interpret this estimate and make a better-informed comparison.
How to use this calculator
- 1Enter your current amount, calculation.
- 2Review the headline total amount and the supporting figures beside it.
- 3Change one input at a time to see which assumption has the biggest effect.
- 4Confirm current Australian rates and thresholds with an official source before acting.
Explore this calculator
What your result means →The headline total amount is based on the inputs currently shown above.Key terms explained →Review the key terms and figures used to calculate this result.How to use this calculator →Enter your figures, review the live result, compare scenarios, then save or print your estimate.The calculation formula →The calculation follows the standard formula for this calculator. Results update whenever an input changes.Worked example →Using the current values produces $1,100.Assumptions and limitations →Review the assumptions used to produce this estimate before relying on it.Costs or factors not included →Review any costs, fees or rules not automatically included before making a decision.Frequently asked questions →How accurate is this estimate? What should I check before relying on it? Can I save or share the result?
▦ How this calculator works
To add GST, the amount is multiplied by 1.1. To extract GST from a total that already includes it, the GST component is the total divided by 11 (equivalent to total × 10/110).
◇ Assumptions and what's not included
Some goods and services are GST-free (basic food, some health and education services) or input-taxed (some financial supplies), so not every transaction attracts GST at all.
▤ What to do next
Confirm whether the specific goods or services are taxable, GST-free or input-taxed before applying this calculation to an invoice or quote.
Australia-specific contextFigures use AUD and current published rates and thresholds.
Reviewed for clarityUpdated 3 August 2026.
ImportantFor planning and educational use — not tax, legal or financial advice.
Your privacy mattersInputs stay in your browser.
Frequently asked questions
Is every purchase in Australia subject to GST?+
No — basic food, many health and education services, and some other categories are GST-free, so always check the GST status of what you're pricing.
How do I extract GST from a total that already includes it?+
Divide the GST-inclusive total by 11 to find the GST component, or divide by 1.1 to find the GST-exclusive amount — this calculator does that for you.
Do businesses need to be registered to charge GST?+
Yes, only businesses registered for GST (generally required once turnover exceeds the registration threshold) can charge and claim GST.
Is GST the same as VAT in other countries?+
It works similarly to a Value Added Tax in concept, but Australia's GST is a single flat 10% rate rather than the multi-rate VAT systems used in some other countries.
Official references
Rules and thresholds used by this calculator are labelled for 2026–27 or formula-labelled period. Review the primary guidance before making a filing, borrowing, benefit or investment decision.
Last source review: 3 August 2026. Calculator results are estimates and may exclude circumstances described in the methodology.