Free tool
GST Calculator
Add or subtract 10% GST in a tap, and see if you need to register.
Total with GST
$110.00
$100.00
before GST
$10.00
GST (10%)
$110.00
inc GST
Do you need to register?
You must register for GST once you turn over $75,000 or more a year.
Australian GST is 10%. This is a guide only, not tax advice, check the ATO or your accountant for your situation.
GST in Australia is a flat 10%. To add GST, multiply a price by 1.1. To find the GST already inside a total, divide it by 11, so a $110 invoice includes $10 of GST. Switch the toggle above to do either.
You must register for GST once your turnover hits $75,000 a year. Once registered you charge 10% on every invoice (labour and materials) and can claim GST back on purchases.
Frequently asked questions
How much is GST in Australia?
GST is a flat 10% on most goods and services. To add GST, multiply the price by 1.1. To find the GST already inside a GST-inclusive total, divide the total by 11.
How do I work out the GST included in a price?
Divide the GST-inclusive total by 11. For example, $110 includes $10 of GST ($110 ÷ 11 = $10), leaving $100 before GST.
When do I have to register for GST?
You must register for GST once your business turnover reaches $75,000 or more in a 12-month period (or you expect it to). Below that it's optional. Once registered, you charge 10% GST and can claim GST back on business purchases.
Do sole traders have to charge GST?
Only if you're registered for GST, which is required once you turn over $75,000 a year. Under that threshold a sole trader can choose whether to register. If you're not registered, you don't add GST to your invoices.
Is GST charged on both labour and materials?
Yes. If you're registered for GST, you charge 10% on the whole invoice, labour and materials included. ONARA Ops adds GST automatically and produces a compliant tax invoice.
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