Singapore GST Calculator
The Singapore GST calculator adds or removes the standard 9% rate. It is an estimate for planning. Reduced, zero, and exempt rates are not included.
Singapore standard GST 9%
Price
Total
SGD 109.00
Net
SGD 100.00
GST
SGD 9.00
Formula
Tax added to a price is the price times 9 divided by 100. The total is the price plus that tax.
Tax removed from a price that already includes it is the price divided by 1 plus the rate. The tax is the difference between the price you typed and the net.
This estimate uses the standard rate only. Some goods and services are reduced, zero-rated, or exempt.
Add: tax = amount × rate / 100. Remove: net = amount / (1 + rate / 100).
- amount The price you type, either before tax or including it.
- rate The standard GST rate for Singapore, 9%. It is fixed on this page.
Worked example
A price of SGD 100.00 before GST at 9% adds SGD 9.00 of tax. The total is SGD 109.00.
Removing GST from SGD 109.00 leaves a net of SGD 100.00.
FAQ
How do I add 9% GST in Singapore?
Multiply the price before tax by 9 and divide by 100. On SGD 100.00, the tax is SGD 9.00 and the total is SGD 109.00.
How do I remove GST from a price in Singapore?
Divide the tax-inclusive price by 1 + 9/100. On SGD 109.00, the net is SGD 100.00 and the tax is SGD 9.00.
Does the Singapore page use reduced rates?
No. It uses the standard 9% rate only. Reduced, zero-rated, and exempt supplies are not calculated.
Related calculators
Rate checked November 11, 2026 against Inland Revenue Authority of Singapore.
This estimate uses the standard rate only. Some goods and services are reduced, zero-rated, or exempt.