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GST calculator
Add or remove 10% GST in one tap.
$
GST amount
$0
| Amount excl. GST | |
| GST (10%) | |
| Amount incl. GST |
Quick BAS GST estimate
Enter GST-inclusive totals for the quarter or month.
$
$
GST to pay
$0
| GST on sales (1A) | |
| GST on purchases (1B) |
Assumes every sale and purchase is taxable. GST-free items (basic food, some health and education) and input-taxed supplies need to be excluded.
How to calculate GST
To add GST: multiply the price by 1.1. To remove GST: divide the GST-inclusive price by 11 to find the GST, or divide by 1.1 for the GST-exclusive price.
Common questions
When do I need to register for GST?
When your business turnover is $75,000 or more a year ($150,000 for non-profits). Taxi and rideshare drivers must register whatever their turnover.
Why divide by 11 and not take 10%?
GST is 10% of the price before GST. In a GST-inclusive price, the GST is 1 part in 11, so $110 includes $10 GST.