Singapore’s IRAS will mandate GST-registered businesses to transmit invoice data via InvoiceNow-Ready Solutions on the InvoiceNow network, starting progressively. A soft launch begins May 1, 2025, followed by mandatory adoption for new voluntary GST registrants from November 1, 2025 (newly incorporated) and April 1, 2026 (all new). This leverages the Peppol-based InvoiceNow system to digitalize invoicing, reducing manual processing. IRAS encourages early adoption and plans to extend mandatory participation to other GST-registered businesses.
Source: iras.gov.sg
Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.