Singapore GST calculator (9%)
Add GST at the standard 9% rate to a net price, or work out the GST already included in a GST-inclusive total — in SGD. The calculator below is free, needs no sign-up, and runs entirely in your browser.
Rates are pre-filled for convenience but always editable. Verify the current rate with your country's tax authority. Calculator results are estimates only, not professional advice.
How Singapore GST is calculated
Adding GST: multiply the net price by 1.09. A SGD 100 item becomes SGD 109.00 once 9% GST is added.
Removing GST: divide the GST-inclusive total by 1.09. From SGD 109.00 inclusive, the net is SGD 100 and the GST portion is SGD 9.00.
The standard rate is 9%, but reduced or zero rates can apply to particular goods and services. For anything you file or charge, confirm the current rate and rules with the relevant Singapore tax authority.
Singapore GST FAQ
- What is the GST rate in Singapore?
- The standard GST rate in Singapore is 9%. Reduced or zero rates may apply to specific goods and services.
- How do I add GST to a price in Singapore?
- Multiply the net amount by 1.09. For example, SGD 100 plus 9% GST is SGD 109.00.
- How do I work out the GST included in a price?
- Divide the GST-inclusive total by 1.09 to get the net amount; the difference is the GST. For SGD 109.00 inclusive, the net is SGD 100 and the GST is SGD 9.00.
- Is the Singapore GST calculator free?
- Yes. The Singapore GST calculator is free and runs entirely in your browser — no sign-up, nothing uploaded.