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Singapore Reverse GST Calculator.
Pre-loaded with the standard GST rate of 9% and default currency symbol S$.
$
+0.00%
5.0%
%
Pre-Tax Base Price
$ 0.00
Tax / VAT Extracted
$ 0.00
Calculated backwards in real-time
Understanding GST in Singapore.
The standard Goods and Services Tax (GST) rate in Singapore is 9% (as of 2024/2026). 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 Singapore
To calculate the pre-tax net cost (base amount) from a gross total that includes a standard 9% GST, apply the reverse VAT calculation formula:
Net Price = Gross Amount / (1 + (9 / 100))
Which simplifies to dividing the total by 1.09.
For example: If you paid a total of S$120.00 inclusive of 9% VAT:
- Divide the gross amount:
S$120.00 / 1.09 = S$110.09(Net Price). - Subtract the net amount from total paid to extract the tax portion:
S$120.00 - S$110.09 = S$9.91(Extracted tax).