GST Calculator
FreeWorks out the GST component at the standard 10% rate. Use “Add GST” when you have a price before GST, and “Remove GST” when the amount already includes it.
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Worked out from the figures you entered. Double-check them before you use this result. General information, not advice. Disclaimer
How to calculate GST in Australia
GST in Australia is 10% of the price before GST. That makes the GST inside a GST-inclusive price one-eleventh of the total.
- Add GST
- Price including GST = price excluding GST × 1.1
- Find the GST in a total
- GST = price including GST ÷ 11
- Remove GST
- Price excluding GST = price including GST ÷ 1.1
Example: A $1,250 job before GST has $125 GST, so you charge $1,375. A $110 receipt includes $10 GST.
Common questions
How do I work out GST from a total that includes GST?
Divide the total by 11. For a $550 total, the GST is $50 and the price before GST is $500.
When do I have to register for GST?
When your GST turnover is $75,000 or more a year, or $150,000 or more for a non-profit. Some businesses must register whatever their turnover, such as taxi and ride-sourcing drivers. Check the ATO’s rules for your situation.
Do I charge GST if I’m not registered?
No. If you aren’t registered for GST, you don’t add GST to your prices and you don’t issue tax invoices.
Is GST charged on everything?
No. Some sales are GST-free, such as most basic food and some health and education services, and some are input-taxed. Check how GST applies to what you sell before you invoice.
Learn more: ATO: GST, ATO: Registering for GST
General information only, not tax or financial advice. Check with your accountant, tax agent or BAS agent for your situation.