The Ultimate GST Guide
Your comprehensive guide to Goods and Services Tax compliance in Singapore.
GST Registration Requirements in Singapore
A business operating in Singapore must determine whether it is legally required to register for GST under IRAS rules.
Mandatory Registration
You must register your business for GST if:
- Retrospective Basis: Your taxable turnover at the end of any calendar year exceeds S$1 million.
- Prospective Basis: You expect your taxable turnover in the next 12 months to exceed S$1 million (e.g., due to signing a large contract).
Voluntary Registration
If your taxable turnover is below S$1 million, you can still apply for GST registration voluntarily. This allows you to claim input tax on business purchases. However, voluntarily registered businesses must remain registered for at least two years and complete online e-Learning courses as a director or owner.
De-Registration
You must apply to cancel your GST registration within 30 days if your business stops making taxable supplies or if your annual taxable turnover drops below S$1 million and stays below it.

