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Remove GST from a Price: 9/109 Formula
Find the price before GST and the GST inside a Singapore price using the 9/109 formula. Free calculator.
Amount
Price without GST
S$91.74
| Before GST | S$91.74 |
| GST (9%) | S$8.26 |
| Including GST | S$100.00 |
How it works
GST is 9% from 1 January 2024. To add it, multiply by 1.09. To find the GST inside a price that already includes it, multiply by 9/109.
Rate last checked October 2026. Not legal, tax or financial advice. 🔒 Everything stays on your device.
✅ Rules last checked:
📚 Official sources: IRAS
We build every tool from the official rules and re-check them when they change. Always confirm with the official source before you rely on a result.
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Questions people ask
What is the GST rate in Singapore?+
9% since 1 January 2024 (it was 8% in 2023 and 7% before that).
How do I remove GST from a price?+
Divide the price by 1.09 to get the amount before GST. The GST part is the price × 9/109. For example S$109 includes S$9 GST.
Do tourists get GST back?+
Tourists can claim a GST refund under the Tourist Refund Scheme on eligible purchases of at least S$100 from participating shops, taken out of Singapore within 2 months.