Source registry
Use the current primary source.
Regulatory scope, implementation dates and provider status can change. This registry records the official pages used in our planning content.
Registry checked: 13 September 2026IRAS
GST InvoiceNow Requirement
Current scope, phased timeline and implementation steps
Primary operational source. Updated by IRAS on 24 August 2026.IRAS
Adopting GST InvoiceNow Requirement for GST-Registered Businesses
Definitions, legal and technical guidance
Second Edition, 9 March 2026.IRAS
GST InvoiceNow Requirement — Frequently Asked Questions
Application dates, boundary cases and submission methods
Version dated 16 April 2026.IMDA
Nationwide E-Invoicing Initiative
Singapore Peppol Authority role and programme timeline
Updated 7 April 2026.IMDA
InvoiceNow
Business definition and connection routes
Updated 4 May 2026.IMDA / IRAS
InvoiceNow-Ready Solution Providers
Current official solution-provider list
List checked 13 September 2026; provider status changes over time.IMDA / IRAS
Access Point Providers
Current official Access Point list
List checked 13 September 2026; service availability must be confirmed directly.OpenPeppol
Singapore Country Profile
Peppol implementation in Singapore
Cross-check source; tax applicability remains governed by IRAS guidance.Provider status policy
We link to the current official lists rather than presenting a static ranking. Listing indicates the status described by the source at its verification date; it is not a commercial endorsement or guarantee of fit.