Singapore GST calculator
Add 9% GST to a price, or find the GST in a price that already includes it. The GST in a GST-inclusive price is 9/109 of the total.
| Price before GST | $100.00 |
| GST 9% | $9.00 |
| Price including GST | $109.00 |
How to add or remove 9% GST
- Add GST: multiply the price before GST by 1.09. $100 becomes $109.00.
- Remove GST: divide the GST-inclusive price by 1.09. $109 becomes $100.00, so the GST is $9.00.
- The GST inside any GST-inclusive price is 9/109 of it. Taking 9% off the total gives the wrong answer.
GST at common amounts
| Price before GST | GST | Price including GST |
|---|---|---|
| $10.00 | $0.90 | $10.90 |
| $50.00 | $4.50 | $54.50 |
| $100.00 | $9.00 | $109.00 |
| $500.00 | $45.00 | $545.00 |
| $1,000.00 | $90.00 | $1,090.00 |
| $5,000.00 | $450.00 | $5,450.00 |
What GST applies to
GST is charged at 9% on most goods and services sold in Singapore by GST-registered businesses, and on imports. Exports and international services are zero-rated. Sales and leases of residential property, most financial services and investment precious metals are exempt.
A business must register for GST once its taxable turnover exceeds $1,000,000 in a calendar year, or is expected to over the next 12 months. Shops must show prices including GST, so the price on the shelf is what you pay.
Restaurants and service charge
At restaurants GST is charged on the food and on the service charge. A $100 bill with a 10% service charge comes to $119.90, because GST is added to $110, not to $100.
Questions and answers
What is 9% GST on $1,000?
$90.00, making $1,090.00 in total.
How do I work out GST backwards?
Divide the price by 1.09 to get the price before GST, or multiply it by 9/109 to get the GST. On $218 the GST is $18.00.
When did GST go up to 9%?
On 1 January 2024. It was 8% in 2023 and 7% before that.
Do tourists get GST back?
Tourists can claim a refund under the Tourist Refund Scheme on eligible purchases from participating shops, with a minimum spend per receipt, when they leave through Changi Airport or the cruise terminals.
Sources
Checked 28 September 2026. OneCalcs is independent and not affiliated with IRAS, the CPF Board, MOM or any government agency.