The updated GST e-Tax Guides will revise registration timelines and ease GMS adoption requirements.

The Inland Revenue Authority of Singapore (IRAS) has revised multiple Goods and Services Tax (GST) e-Tax Guides, effective from 1 July 2025, addressing prospective GST registration rules and changes to the Gross Margin Scheme (GMS).

From 1 July 2025, businesses forecasting taxable turnover exceeding SGD 1 million in the next 12 months must register for GST within 30 days of the forecast. However, GST registration will take effect two months after the forecast date. This extends the current rule, under which GST is charged from the 31st day after the forecast.

Additionally, multiple e-Tax Guides have been updated to reflect that, from 1 July 2025, eligible businesses may adopt the GMS without prior approval from IRAS. Corresponding updates to relevant paragraphs and documents have been made across several guides.

Guide-specific updates: