E-invoicing mandate

E-invoicing in Singapore

A sourced summary of the structured e-invoicing program in Singapore. It is a starting point, not a compliance certificate or proof of delivery.

At a glance

Scope: Business-to-business
Status: Phasing in
Network or channel: InvoiceNow (Peppol)
Format: SG Peppol BIS

What this means for you

GST-registered businesses submit invoice data through InvoiceNow in phases: voluntary-registration cohorts from 2025-2026, then existing/new compulsory registrants from 2028 through 2031 based on registration timing and 2025 annual supplies.

What FreeBillGen can verify

For eligible saved invoices, FreeBillGen can prepare generic OASIS UBL and UN/CEFACT CII mappings and run its named internal checks. These mappings are not EN 16931, Factur-X, Peppol, national-CIUS or clearance-platform validation. FreeBillGen does not transmit them through a provider network.

Check this route in Invoice Passport

Official sources used

IRAS - GST InvoiceNow Requirement (opens in a new tab) Source reviewed 2026-08-17

General information only; not legal, tax, accounting, conformance, or delivery-provider advice. Confirm the current scope, technical profile, and channel with the official source or a qualified advisor.