Singapore Service Charge And Gst Calculator Bill Amount (SGD) ℹEnter your pre-tax and pre-service charge bill. Service Charge (%) ℹTypically 10% in Singapore restaurants. GST (%) ℹAs of 2025, Singapore GST is 9%. Calculate Total ResetFor informational purposes only. GST and service rates may vary.Final amount will appear hereEnter details and click Calculate.