Timeframe
2019: Launch of InvoiceNow, the nationwide e-invoicing network based on the international Peppol standard.
May 2025: Start of voluntary participation (soft launch) for all GST-registered companies.
November 2025: Mandatory use of InvoiceNow for newly established businesses that voluntarily choose to register for GST.
April 2026: Extend the obligation to all new voluntary GST registrants, regardless of the date of incorporation or the type of business.
applicability
The e-invoice primarily covers Business-to-Government (B2G) and Business to Business (B2B) transactions.
format
Peppol BIS Billing 3.0 – Format.
Electronic signature
Electronic signatures are not mandatory.
Archiving
E-invoices must 5 years long be archived.
For more information on e-invoicing in Singapore:

GOpus® eInvoice
Our GOpus® eInvoice The solution integrates with SAP ERP and SAP S/4HANA and supports the creation of outgoing e-invoices in all international country formats. This allows you to create and send all your invoice content between different international invoice issuers and recipients directly from your SAP system, and to archive all invoice documents with comprehensive monitoring. Integration with the SAP modules SD, FI, MM, RE/FX, IS-H, IS-U, and SAP Service Billing is possible. Further integrations are available upon request.
Do you have further questions about our solution or would you like to learn more about e-invoicing regulations in Singapore?
We will be happy to personally assist you with any further questions you may have about our solution and the regulations.
