GST Calculator
Add 10% GST to a price or pull the GST out of a GST-inclusive amount — with the divide-by-11 rule, GST-free items and registration thresholds explained
Price Details
The net amount before 10% GST is added.
Adding GST: multiply the GST-exclusive price by 1.1 (a flat 10%).
Results
GST Amount (10%)
10% of $100.00
Excluding GST (net)
Your input
Including GST (gross)
Price after GST
Quick reference
- • GST-exclusive → GST-inclusive: multiply by 1.1
- • GST-inclusive → GST component: divide by 11
- • GST-inclusive → GST-exclusive: divide by 1.1
- • Registration is required at $75,000.00 annual GST turnover ($150,000.00 for not-for-profits)
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Frequently asked questions
How do I add GST to a price?
Multiply the GST-exclusive price by 1.1. GST is a flat 10%, so a $100 price becomes $110 including GST, of which $10 is GST. The rate has been 10% since GST began on 1 July 2000.
How do I work out the GST in a GST-inclusive price?
Divide the total by 11. Because GST is 10% of the net price, the tax is one-eleventh of the gross price — a $110 purchase contains $10 of GST, not $11. Dividing by 10 is the most common GST mistake.
What items are GST-free in Australia?
Most basic food (bread, milk, fresh fruit and vegetables, plain meat), most health and medical services and medicines, most education courses, exports, and water and sewerage services are GST-free. Restaurant meals, takeaway, confectionery, soft drinks and alcohol still attract GST. Residential rent and most financial services are input-taxed, which also means no GST is charged.
When does a business have to register for GST?
When annual GST turnover reaches $75,000, or as soon as you reasonably expect it to — you then have 21 days to register. Not-for-profit organisations have a $150,000 threshold, and taxi or ride-sourcing drivers must register regardless of turnover. Below the threshold registration is optional.
What is a BAS and how does GST reporting work?
A Business Activity Statement is how registered businesses report GST to the ATO. You report GST collected on sales, claim credits for GST paid on business purchases (keep tax invoices for purchases over $82.50), and pay or receive the difference. Most small businesses lodge quarterly; check your BAS or the ATO for the due dates that apply to you.