PINT-SG Explained: Singapore's Peppol Invoice Format

If your business is preparing for Singapore's GST InvoiceNow Requirement, one term comes up again and again: PINT-SG. It is the invoice format your e-invoices must use to be accepted on the InvoiceNow network and reported to IRAS. Here is what it means in practice.

What is PINT-SG?

PINT-SG (Peppol INTernational - Singapore) is the structured XML invoice format for InvoiceNow. It is Singapore's national specialisation of the global PINT model, maintained under the Peppol framework and adapted for Singapore's GST rules and IRAS reporting. A PINT-SG invoice is machine-readable data - not a PDF or an image - so a buyer's finance system can validate and post it automatically.

Why PINT-SG replaced SG Peppol BIS Billing 3.0

When InvoiceNow launched in 2019 it used SG Peppol BIS Billing 3.0, a local extension of the European Peppol BIS 3.0. PINT-SG is its cleaner, internationally aligned successor. Since 1 April 2025, all IMDA-accredited solution providers have been required to support PINT-SG, and it is the format underpinning the GST InvoiceNow Requirement. The current published specification is PINT SG Billing v1.3.0.

The data a PINT-SG invoice must carry

A compliant PINT-SG invoice captures the structured equivalent of a full tax invoice, including:

• •Supplier and buyer legal names, addresses and GST registration numbers (where applicable)
• •Supplier and buyer Peppol identifiers (UEN-based, using the 0195:SGUEN scheme)
• •A unique invoice number and the invoice issue date
• •Line-item descriptions, quantities and unit prices
• •The applicable GST rate and GST amount, per line and in summary
• •Invoice totals - net, total GST and gross payable - plus the currency code

GST categories and validation

PINT-SG carries GST treatment as coded data: standard-rated, zero-rated and exempt supplies each map to specific tax category codes. Accredited solutions validate these codes and the document structure before transmission, so format errors and missing fields are caught before the invoice leaves your system rather than after it reaches IRAS.

Why PDFs do not qualify

A PDF - even a digitally signed one - is unstructured. It cannot be validated or posted automatically and does not meet the GST InvoiceNow Requirement. You can still send a human-readable copy to a customer, but the compliant record is the PINT-SG transmission through an accredited solution.

What this means for your business

You do not need to hand-build PINT-SG XML. An InvoiceNow-Ready solution generates it from your existing invoice data and maps your ERP or accounting fields to the required elements. The practical work is making sure those source fields - GST numbers, tax codes, totals - are complete and correct.