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Australia Reverse GST Calculator.
Pre-loaded with the standard GST rate of 10% and default currency symbol A$.
$
+0.00%
5.0%
%
Pre-Tax Base Price
$ 0.00
Tax / VAT Extracted
$ 0.00
Calculated backwards in real-time
Understanding GST in Australia.
The standard Goods and Services Tax (GST) rate in Australia is 10%. This calculator isolates the net value and GST amount from any gross purchase total using standard international calculation guidelines.
How to Back Out VAT/GST in Australia
To calculate the pre-tax net cost (base amount) from a gross total that includes a standard 10% GST, apply the reverse VAT calculation formula:
Net Price = Gross Amount / (1 + (10 / 100))
Which simplifies to dividing the total by 1.10.
For example: If you paid a total of A$120.00 inclusive of 10% VAT:
- Divide the gross amount:
A$120.00 / 1.10 = A$109.09(Net Price). - Subtract the net amount from total paid to extract the tax portion:
A$120.00 - A$109.09 = A$10.91(Extracted tax).