Add Singapore's 9% GST to a price, or work out the GST inside a GST-inclusive price with the 9/109 fraction.
Tax year Rate in force November 2026Rules checked: November 2026How we calculate
GST included$9.00
Before GST
$100.00
With GST
$109.00
Before GST
$100.00
GST 9%
$9.00
With GST
$109.00
The GST in a GST-inclusive price is 9/109 of the price.
This is an estimate based on published rates, not tax or financial advice. Your payslip or assessment may differ. We are an independent site, not affiliated with any government agency.
The formulas
Adding GST: price with GST = price × 1.09.
Removing GST: GST = price with GST × 9/109; price before GST = price with GST ÷ 1.09.
Worked example
$109 including GST
GST included$9.00
Before GST
$100.00
With GST
$109.00
Before GST
$100.00
GST 9%
$9.00
With GST
$109.00
A service quoted at $2,000 before GST is billed at $2,180, and the GST-registered supplier accounts for $180 in its GST return.
Tips
Prices must be displayed GST-inclusive to consumers by GST-registered businesses.
Zero-rated supplies (exports and international services) are charged at 0% but still let businesses claim input tax.
Assistance schemes such as the GST Voucher help lower-income households with the cost of GST.
Questions people ask
What is the GST rate in Singapore?
9% since 1 January 2024, after rising from 7% to 8% in 2023.
How do I calculate the GST in a price?
Multiply the GST-inclusive price by 9/109. $109 includes $9 of GST.
When must a business register for GST?
When taxable turnover exceeded $1 million in the past 12 months, or is expected to exceed $1 million in the next 12 months.
Are tourists refunded GST?
Tourists can claim GST refunds on eligible purchases of at least $100 (including GST) from participating retailers under the electronic Tourist Refund Scheme.
This is an estimate based on published rates, not tax or financial advice. Your payslip or assessment may differ. We are an independent site, not affiliated with any government agency. Read the full disclaimer.
