GST-registered businesses in Singapore must issue a tax invoice showing their GST registration number and the GST charged at a flat 9%. Businesses below the SGD $1 million registration threshold can omit GST entirely.
Singapore invoice requirements
•Include your GST registration number if GST-registered
•GST rate is a flat 9% on most taxable supplies
•Businesses under the SGD $1M threshold may not need to charge GST
•Must show the price, GST amount, and total separately