Updated 8 November 2026

Email us at [email protected] with questions, corrections or feedback about our GST calculators and guides.

If a figure looks wrong, please include:

• The amount you entered
• Whether you chose Add GST or Remove GST
• The GST rate, if you changed it
• A link to the official source, if you have one

We can’t give personal financial, legal or tax advice, or tell you how GST applies to your business. For that, contact the Australian Taxation Office or a registered tax agent.