Submit e-Invoices to IRAS through Singapore’s InvoiceNow Peppol network is the structured, automated process through which GST-registered Singapore businesses deliver their tax invoices to InvoiceNow-registered trading partners and government entities — satisfying IRAS’s mandatory structured invoice exchange requirement under the InvoiceNow mandate. Understanding exactly how to Submit e-Invoices to IRAS-connected systems through InvoiceNow — what infrastructure is needed, what the PINT invoice must contain, how the Peppol network handles routing and delivery, and how businesses confirm that their invoice submissions were accepted — is essential for every Singapore business completing their InvoiceNow implementation. This step-by-step guide covers everything Singapore businesses need to know about how to Submit e-Invoices to IRAS requirements through InvoiceNow, from initial setup through live invoice submission. The Advintek Singapore portal provides certified InvoiceNow implementation services that activate the ability to Submit e-Invoices to IRAS-compliant infrastructure for businesses across all accounting platforms.
Understanding IRAS e-Invoice Requirements
What IRAS Requires for e-Invoice Submission
To Submit e-Invoices to IRAS-compliant InvoiceNow infrastructure, Singapore businesses must generate invoices in PINT A-NZ BIS Billing 3.0 structured XML format and deliver them through a certified Singapore Peppol Access Point. IRAS does not accept PDF documents, email attachments, or other non-structured formats as compliant e-invoice submissions under the InvoiceNow mandate — only structured PINT XML invoices delivered through the Peppol network satisfy the mandate’s technical compliance requirements. IRAS Peppol Submission requirements include specific GST data fields that every PINT invoice must carry: the supplier’s GST registration number, the buyer’s GST registration number, the GST category code and rate for each line, the GST amount, and the total payable inclusive of GST.
Government Agency Invoice Submission
To Submit e-Invoices to IRAS for government agency billing, Singapore businesses must transmit their structured PINT invoices through the Peppol network to the government agency’s InvoiceNow-registered receiving system — typically the government’s centralised e-invoice receiving infrastructure that routes Peppol-delivered invoices into the relevant agency’s accounts payable processing system. Singapore businesses that successfully Submit e-Invoices to IRAS-connected government agency systems benefit from the government’s five-day payment commitment for eligible small business suppliers.
Step-by-Step Submission Process
Step 1: Set Up Your InvoiceNow Infrastructure
Before you can submit e-invoices to IRAS-compliant systems, your business must have: a certified Singapore PEPPOL Access Point subscription that registers your business in the PEPPOL Directory; an InvoiceNow-compatible accounting or ERP system that generates PINT A-NZ BIS Billing 3.0 structured invoices; and master data records for your customers and suppliers that include correct GST registration numbers and PEPPOL Participant Identifiers for InvoiceNow-registered trading partners. InvoiceNow Submission Guide resources from IMDA and certified PEPPOL Access Point providers provide step-by-step guidance for each infrastructure setup component. Similar implementation best practices also support LHDN e-Invoicing Malaysia, helping businesses establish compliant digital invoicing infrastructure and maintain accurate tax data.
Step 2: Generate the PINT Invoice in Your Accounting System
To Submit e-Invoices to IRAS requirements, the invoice must be generated as a PINT A-NZ BIS Billing 3.0 structured XML document by your InvoiceNow-integrated accounting or ERP system. Your accounting platform’s certified InvoiceNow module handles this automatically when you create a standard invoice — mapping your invoice data to the PINT XML schema, populating all mandatory PINT fields, and generating the structured XML document that the Peppol network requires for delivery. PINT Invoice Singapore format validation occurs automatically within the certified InvoiceNow module before submission — confirming that all mandatory fields are present and all values are within accepted IRAS-approved ranges.
Step 3: Submit Through Your Peppol Access Point
Once your accounting system’s InvoiceNow module generates the PINT structured invoice and validates it against Singapore’s InvoiceNow schema rules, the invoice is automatically submitted through your certified PEPPOL Access Point to the PEPPOL network for delivery to the recipient’s access point. Your PEPPOL Access Point handles all network routing, message delivery, and delivery confirmation—you do not need to manually upload files to any IRAS portal or government website to submit e-invoices to IRAS-connected systems. The PEPPOL network’s four-corner architecture routes your structured PINT invoice from your access point to the recipient’s access point automatically based on their PEPPOL Participant Identifier. This automated workflow helps businesses prepare for the April 2026 InvoiceNow Mandate, ensuring compliant, efficient, and seamless structured invoice exchange.
Step 4: Confirm Delivery and Archive the Invoice
After your PEPPOL Access Point delivers the structured PINT invoice to the recipient’s access point, a delivery confirmation is automatically returned to your accounting system, confirming the delivery timestamp and providing the PEPPOL transmission reference that serves as evidence of successful e-invoice submission. This delivery confirmation must be retained alongside the original PINT invoice as part of your Singapore e-invoicing compliance records. Singapore GST e-Invoicing record retention requirements specify that businesses must retain structured invoice records and delivery confirmations for the same period as other tax records—currently five years from the end of the accounting period to which the invoice relates. Businesses using the Zoho Books ERP Connector can automate record management, maintain accurate audit trails, and simplify compliance with Singapore’s e-invoicing retention requirements.
Common Submission Errors to Avoid
Missing or Incorrect GST Registration Number
The most common reason businesses fail to submit e-invoices to IRAS-compliant standards is a missing or incorrect GST registration number in the PINT invoice—either the supplier’s own GST registration number or the buyer’s GST registration number for GST-registered customers. PINT invoice validation checks GST registration number format and, for the buyer’s GST number, may verify it against IRAS’s active taxpayer registry. Ensuring that your accounting system’s company record carries your correct GST registration number and that each customer record carries the customer’s correct GST registration number eliminates this category of submission failure. E-Invoice Submission Steps guides consistently identify GST registration data accuracy as the most important master data quality control for successful InvoiceNow submission. Businesses using Macola Invoice Automation can further improve data accuracy, automate invoice validation, and streamline IRAS-compliant e-invoice submissions.
Incorrect GST Category Code
The second most common reason businesses cannot successfully submit e-invoices to IRAS requirements is an incorrect GST category code in the PINT invoice—applying the wrong code from IRAS’s defined enumeration (S for standard 9%, Z for zero-rated, E for exempt, AE for reverse charge) to a transaction type. Configuring correct GST category codes for every product and service type in your accounting system’s product catalogue before the first live PINT invoice is generated prevents GST category code errors at the source rather than requiring post-submission correction. Businesses implementing Kingdee Cloud Galaxy ERP Integration can automate GST mapping, improve invoice accuracy, and streamline InvoiceNow compliance through seamless ERP integration.
Why Use Advintek for Submission
End-to-End InvoiceNow Implementation
Successfully submitting e-invoices to IRAS-compliant InvoiceNow infrastructure requires correctly configured accounting platform integration, certified PEPPOL Access Point connectivity, accurate master data, and systematic testing—all of which Advintek’s certified InvoiceNow implementation services cover end-to-end. Singapore InvoiceNow Help from Advintek ensures that every component of your InvoiceNow submission capability is correctly configured, tested, and validated before you submit e-invoices to IRAS-connected trading partners and government agencies under live compliance conditions. Advintek also supports Belgium e-invoicing initiatives, helping businesses implement compliant digital invoicing solutions and streamline cross-border invoice processing.
Conclusion
To submitting e-invoices to IRAS-compliant InvoiceNow infrastructure, Singapore businesses need a certified Peppol Access Point subscription, an InvoiceNow-integrated accounting or ERP system that generates PINT structured invoices, accurate master data for trading partners, and systematic testing before go-live. When these components are correctly in place, the process to submitting e-invoices to IRAS-connected systems is fully automated — your accounting system generates the PINT invoice, your Peppol Access Point delivers it to the recipient, and delivery confirmation is returned to your accounting records automatically, without any manual portal upload or file management steps.
Frequently Asked Questions
Q1. Do businesses need to manually upload invoices to an IRAS portal to submit e-invoices?
No — InvoiceNow submission is automated through your Peppol Access Point; no manual IRAS portal upload is required for Peppol-delivered structured invoices.
Q2. What format must Singapore e-invoices be in for IRAS compliance?
PINT A-NZ BIS Billing 3.0 structured XML format — PDF documents and email attachments do not satisfy InvoiceNow structured invoice requirements.
Q3. How do I confirm that my e-invoice submission was received?
Your Peppol Access Point returns automatic delivery confirmation to your accounting system when the recipient’s access point receives the structured invoice.
Q4. How long must Singapore businesses retain e-invoice submission records?
Five years from the end of the accounting period — retain both the structured PINT invoice and the Peppol delivery confirmation as compliance records.
Q5. What is the most common reason an InvoiceNow submission fails?
Missing or incorrect GST registration numbers in the PINT invoice — ensure all customer master data records carry correct, current GST registration numbers.
Source by:
Image by ChatGPT
