Calculate Australian Goods and Services Tax (10%). Add GST to a price or extract GST from a GST-inclusive amount.
$
Original Amount
$100.00
GST Amount (10%)
$10.00
Total (inc. GST)
$110.00
GST Rate
10%
About This Australian GST Calculator
This free Australian GST calculator instantly adds or removes 10% GST (Goods and Services Tax) from any amount. Perfect for business owners, freelancers and consumers.
GST is a 10% tax applied to most goods and services in Australia. Businesses registered for GST must charge it on taxable sales and can claim GST credits on business purchases.
When Do You Need to Register for GST?
You must register for GST if your business turnover exceeds or is likely to exceed $75,000 per year ($150,000 for non-profit organisations). Once registered, you must charge GST on taxable sales and lodge regular Business Activity Statements (BAS) with the ATO.
Frequently Asked Questions
What is GST in Australia?+
GST (Goods and Services Tax) is a 10% tax on most goods and services sold in Australia. It was introduced in 2000.
Do I have to register for GST?+
You must register if your annual turnover is $75,000 or more. Below this threshold, registration is optional but may be beneficial.
Are all goods and services subject to GST?+
No — some items are GST-free, including basic food, medical services, childcare, education and exports.
How do I calculate GST from a GST-inclusive price?+
Divide the total price by 11. For example: $110 ÷ 11 = $10 GST. The pre-GST price is $100.
When do I need to lodge a BAS?+
BAS (Business Activity Statement) is typically lodged monthly or quarterly, depending on your turnover. The ATO sets your lodgement frequency when you register.