Singapore’s nationwide e-invoicing framework, built on the Peppol (Pan-European Public Procurement Online) network and locally operationalized via the IMDA-accredited InvoiceNow platform, mandates the use of structured Peppol BIS Billing 3.0 (SG profile) XML documents for all new government suppliers since 2023, with progressive extension to existing suppliers and voluntary adoption accelerating in the B2B space. By enabling direct, real-time transmission of validated invoices between finance systems through accredited Access Point providers.
InvoiceNow eliminates manual data entry, enforces built-in GST compliance rules, supports dynamic discounting and supply-chain financing use cases, and provides end-to-end traceability via the Peppol four-corner model. As Singapore moves toward full mandatory B2B e-invoicing under the IRAS Roadmap 2025–2027, adopting a Peppol-ready ERP or invoicing solution has become a critical technical and compliance imperative for businesses operating in or with Singapore.
New Stuff: –GST F5-F8 Report in Singapore Localization Suite
In this blog series, we take a practical, technical deep-dive into implementing Singapore Peppol-based e-invoicing with Sage Intacct via the InvoiceNow network.
The first critical step in achieving seamless end-to-end InvoiceNow transmission is ensuring full alignment between Sage Intacct’s Unit of Measure (UOM) master and the UN/ECE Recommendation 20/21 codes mandated by the Singapore Peppol BIS Billing 3.0 profile. To streamline this mandatory mapping process and eliminate manual errors that would otherwise cause invoice validation failures at the Access Point level, we have introduced a dedicated UOM Mapping UI within Sage Intacct’s InvoiceNow configuration module.
In the sections ahead, we will walk through the configuration workflow, best practices for maintaining the mapping table, and how this foundational setup enables Sage Intacct to generate fully compliant Peppol XML instances ready for direct transmission through your chosen InvoiceNow Access Point provider.
Please refer below screenshot of the “Units Master UI”.
In the screenshot, as shown, the user first needs to select the UOM (Unit of Measure) from Sage Intacct under “Unit of Measure.” Then, in the “InvoiceNow Unit Code” field, the user must choose the corresponding E-Invoicing UOM from the picklist. The picklist is fully compliant with Peppol BIS Billing standards, in accordance with Singapore’s e-invoicing requirements. Entity ID will automatically get populated after User clicks on the save Button.
Accurate UOM mapping via Sage Intacct’s dedicated InvoiceNow UI ensures your invoices are 100% compliant with Peppol BIS Billing 3.0 (SG profile), eliminating one of the top causes of Access Point rejections. With this foundation in place, you’re ready for Singapore’s mandatory B2B e-invoicing rollout (2025–2027), faster payments, and zero-touch processing.
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