GST Exclusive Calculator
Remove GST from a price or add it. To get the GST-exclusive amount from a GST-inclusive price you divide by 11, this does it both ways for you.
How we estimate this
Australian GST is 10%. To find the GST within a GST-inclusive price you divide by 11 (not by 1.1, a common error). To add GST to a GST-exclusive price you multiply by 0.1 and add it on.
Pricing reviewed: November 2026.
Understanding gst exclusives in Australia
Australian GST is 10%. To find the GST within a GST-inclusive price you divide by 11 (not by 1.1, a common error). To add GST to a GST-exclusive price you multiply by 0.1 and add it on.
Businesses registered for GST must show whether prices include GST, and a valid tax invoice shows the GST amount. This calculator gives the GST component and both the inclusive and exclusive prices.
Frequently asked questions
How do I work out GST-exclusive price in Australia?
Divide the GST-inclusive price by 11 to get the GST, then subtract it. For example, $1,100 inclusive contains $100 GST, so the GST-exclusive price is $1,000.
Do I divide by 1.1 or 11 to remove GST?
Divide by 11 to get the GST amount within a GST-inclusive price. Dividing by 1.1 gives the GST-exclusive price directly, both get you there, but dividing by 11 isolates the GST.
Are you a bookkeeper / accountant?
Everyone on this page is working out what gst exclusive costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.