GST Calculator Australia
Add or remove 10% Australian GST from any amount. Perfect for invoices, receipts, quotes and BAS preparation.
Enter the GST-exclusive amount to add 10% GST.
GST Inclusive Total
$110.00
How to Calculate Australian GST
Adding GST: Gross = Net × 1.10. A $100 net invoice becomes $110 inclusive.
Removing GST: Net = Gross ÷ 1.10. A $110 gross receipt contains $100 net + $10 GST.
GST component shortcut: Divide the GST-inclusive total by 11. $110 ÷ 11 = $10 GST.
Frequently Asked Questions
How do I calculate GST in Australia?
To add 10% GST, multiply the net amount by 1.1. To remove GST from a gross amount, divide by 1.1 — the GST component is the gross divided by 11.
What is the GST rate in Australia?
The Goods and Services Tax (GST) in Australia is 10% on most goods and services. It has been at 10% since GST was introduced on 1 July 2000.
Are any items GST-free in Australia?
Yes. Basic food, most medical and health services, education, water, sewerage, exports and some childcare services are GST-free. Financial services and residential rent are input taxed (no GST charged, but you can't claim credits).
When do I have to register for GST?
You must register for GST if your business has a GST turnover of $75,000 or more ($150,000 for non-profits). Taxi and rideshare drivers must register regardless of turnover.
How do I extract GST from a gross amount?
Divide the GST-inclusive amount by 11. For example, $110 inclusive contains $10 GST. Or equivalently, multiply by 1/11.