General information
Purpose & Benefits
- Simplifies tax compliance and automates document management.
- Cuts manual data entry, reduces errors, and speeds up payment cycles.
- Creates new vendor management opportunities, such as early payment discounts and invoice status tracking.
Implementation Timeline
- 1 May 2025: Soft launch for voluntary early adopters.
- 1 Nov 2025: Mandatory for newly incorporated companies applying for voluntary GST registration.
- 1 Apr 2026: Mandatory for all voluntary GST registrants.
- Future expansion: To all GST-registered companies (date TBA).
How InvoiceNow Works (Peppol 5-Corner Model)
- Supplier generates a PINT SG XML invoice in an InvoiceNow-ready solution.
- Supplier’s Access Point (AP) validates and forwards invoice; sends copy to IRAS.
- Buyer’s AP delivers invoice to buyer’s system; data also queued for IRAS.
- Buyer’s ERP processes and archives the invoice (5-year retention).
- IRAS receives invoice data in near real time.
For non-Peppol invoices (PDF/paper), data must be uploaded manually via IRAS portal or API.
Scope & Compliance
- Applies to new voluntary GST registrants from Nov 2025, all voluntary registrants from Apr 2026, and early adopters from May 2025.
- Exemptions: Overseas entities, and businesses GST-registered only due to Reverse Charge rules.
- Data submission must align with GST return deadlines.
- Credit notes and adjustments must also be reported.
Invoice Data Covered
- Standard rated supplies: Local sales, GMS, customer accounting.
- Zero-rated supplies: Exports, international services.
- Exempt supplies: Residential property, investment in precious metals.
- Standard and zero-rated purchases.
- Excluded: Deemed supplies, reverse charge, out-of-scope supplies, non-GST supplier purchases.
System & Validation
- InvoiceNow-ready solutions validate formats, detect incorrect GST charges, and prevent duplicate submissions.
- IMDA (as Peppol Authority) accredits Access Points and defines technical specifications.
Updates & New Document Types
- Purchase Orders (buyers to suppliers) and Invoice Responses (status updates from buyers).
The InvoiceNow mandate represents a structural change in Singapore’s tax compliance landscape. By linking e-invoicing with near real-time reporting to IRAS, it enhances transparency and reduces risk of error or fraud. The phased rollout offers businesses time to adapt, but early preparation is critical:
- Adopt InvoiceNow-ready solutions and partner with accredited APs.
- Review ERP integration, archiving, and data governance.
- Train finance and tax teams for new workflows.
Businesses that adapt early will benefit from cost savings, automation, and compliance readiness, while those delaying risk payment delays, audit challenges, and penalties once enforcement begins.
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