Price breakdown
The GST-exclusive price vs the 10% GST component.
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Tax & Money
Australia GST Calculator
Add Australia's 10% GST to a price, or work out how much GST is already included, and see the GST amount plus the price excluding and including GST.
GST amount
$10.00
Price excluding GST—
GST (10%)—
Price including GST—
How GST works in Australia
GST (Goods and Services Tax) is a flat 10% tax added to most goods and services sold in Australia, unchanged since it started in July 2000. If a price is GST-exclusive, add 10% to find the price the customer pays. If a price is GST-inclusive, the GST is already baked in and equal to 1/11th of that total.
The formula
if excluding GST: GST = price × 10%, total = price × 1.10
if including GST: GST = price ÷ 11, price excluding GST = price ÷ 1.10
if including GST: GST = price ÷ 11, price excluding GST = price ÷ 1.10
Worked example
A product is priced at $110 including GST. Dividing by 11 gives $10.00 GST, leaving a $100.00 GST-exclusive price. Going the other way, a $100 GST-exclusive price has $10 of GST added to reach the same $110 GST-inclusive total.
Frequently asked questions
What is the GST rate?
A flat 10%, unchanged since GST began in July 2000.
How do I add GST?
Multiply the exclusive price by 10% and add it on, or multiply by 1.10.
How do I remove GST?
Divide the inclusive price by 11 for the GST, or by 1.10 for the exclusive price.
What's GST-free?
Most basic food, many health and medical services, most education, and exports.
Do I need to register?
Required at $75,000 GST turnover ($150,000 for non-profits), optional below that.