What the network does
IMDA’s brochure version 1.3, updated 26 February 2026, describes InvoiceNow as Singapore’s nationwide e-invoicing network introduced in 2019. It uses international Peppol standards to transmit invoices securely between different finance systems. The brochure reports over 63,000 participating businesses at that version date, served by InvoiceNow-Ready Solution Providers and Access Point Providers.
What GST reporting adds
GST-registered businesses within the phased requirement send invoice data for GST supplies and purchases through InvoiceNow-Ready Solutions to IRAS. Coverage includes tax invoices, credit notes, aggregated cash sales and aggregated petty-cash purchases, and equivalent documents serving as payment bills or bill adjustments. Sending data does not replace GST return filing or proper business/accounting record retention.
Choose a suitable connection
Microbusinesses without accounting software can consider free basic InvoiceNow solutions. SMEs can choose an IMDA-accredited off-the-shelf accounting/finance solution and activate InvoiceNow. Larger businesses with in-house enterprise software can engage an accredited Access Point Provider for integration. A free or low-cost portal and deep in-house integration meet different operational needs; the brochure does not prescribe one product for all businesses.
Phased dates and the annual-supplies measure
The brochure’s roadmap starts 1 November 2025 for companies voluntarily registering for GST within six months of incorporation; 1 April 2026 for all new voluntary registrants regardless of age/structure; and 1 April 2028 for all new compulsory registrants and existing registrants with annual supplies at most S$200,000. Existing registrants follow by 1 April 2029 at at most S$1 million, 1 April 2030 at at most S$4 million, and 1 April 2031 above S$4 million. These cumulative thresholds describe phased onboarding; an earlier applicable phase is not postponed by a later larger ceiling. Total annual supplies means standard-rated, zero-rated and exempt supplies in prescribed accounting periods ending in calendar 2025.
Three onboarding actions
First verify the solution against IMDA’s accredited solution list (go.gov.sg/invoicenowirsp), or connect in-house software through an accredited AP (go.gov.sg/invoicenowap). Second ask the solution/AP provider to register the business’s UEN in the SG Peppol Directory and obtain its Peppol ID. Third enable the GST InvoiceNow submission feature; in-house users must confirm with the AP that IRAS connectivity and that feature are enabled. Network registration alone does not establish that tax-data submission is active.
Benefits and limits
The brochure contrasts fragmented portals, duplicate entry, lost/delayed emails and manual audit data with one interoperable solution, automated posting and secure transmission. It describes potential shorter GST audits/faster refunds when data reaches IRAS. Alerts for wrongful GST charging by non-registered suppliers are available from some providers, not every solution. More information is at go.gov.sg/imda-invoicenow-info and go.gov.sg/iras-gst-info; the source makes no guaranteed refund deadline.
Official source
This article independently explains the substantive contents of the official PDF, including the relevant conditions, procedures and annexes. The linked document remains the authoritative source for its original wording, and later changes should be checked separately.
Read the official PDF ↗