What is the InvoiceNow Mandate?
InvoiceNow is Singapore’s nationwide e-invoicing network, based on the Peppol standard. GST-registered businesses will be required to transmit invoice data to IRAS using InvoiceNow-Ready Solutions. (iras.gov.sg)
Who Needs to Comply and When
| Phase | Who Must Comply | Implementation Date |
|---|---|---|
| Phase 1 | Businesses registering voluntarily for GST on or after 1 April 2026, regardless of incorporation date or business structure (iras.gov.sg) | 1 April 2026 |
| Upcoming | Businesses registering for GST compulsorily after 1 April 2028, and existing GST-registered businesses with annual supplies ≤ S$200,000 (iras.gov.sg) | 1 April 2028 |
Existing GST-registered businesses will be informed of their mandatory implementation date by mid-2026. (iras.gov.sg)
What You Need to Do Now: Action Plan
- Check if you’re already compliant: If you registered for GST after 1 April 2026, you may already be using an InvoiceNow-ready solution.
- Assess your software: If not yet compliant, ensure your accounting or invoicing software can connect to the Peppol network or an InvoiceNow-Ready Solution.
- Update internal systems: Integrate electronic invoicing workflows; ensure staff, accounting, and finance tools support structured invoice data transmission.
- Explore grants: IRAS provides grants for businesses adopting InvoiceNow early. SMEs and larger businesses have different grant packages. (iras.gov.sg)
- Stay alert to your implementation schedule: Keep track of when you will be notified of your mandatory date; start planning ahead to avoid rush costs.
Benefits of Adopting InvoiceNow Early
- Reduced manual data entry, fewer errors in invoicing, and faster reconciliation.
- Better visibility of transaction data for both the business and IRAS.
- Early access to grant funding offsets the cost of initial setup.
- Builds a digital infrastructure for future tax admin enhancements (e.g., e-audits, real-time reporting).
Potential Pitfalls & How to Mitigate Them
- Software compatibility issues: Test early, work with vendors to ensure conformance with Peppol and IRAS requirements.
- Operational disruption: Train staff well ahead; pilot the new system in a subset of operations first.
- Deadline uncertainties: Monitor IRAS announcements; non-compliance could lead to regulatory issues or delays in claiming input tax.
Practical Example
Imagine a small café that had annual GST-able supplies of S$150,000 as of 2025. It’s currently using paper invoices. Given its size, it’s likely to be mandated under the extended phase in April 2028. To prepare, the café should:
- Begin conversations with its software provider to integrate InvoiceNow;
- Apply for the SME InvoiceNow Transition Grant early to offset setup costs;
- Train staff on new invoicing workflows ● digitize invoice issuance and receipt;
- Review internal recording of invoices to align with the structured data format.
Timeline Summary
- 1 April 2026: Start of mandatory compliance for voluntarily GST-registered businesses on or after this date. (iras.gov.sg)
- Mid-2026: Notifications to existing GST businesses about their mandatory date. (iras.gov.sg)
- 1 April 2028: Broader mandatory compliance for all other GST-registered businesses (including small ones). (iras.gov.sg)
By planning now, Singapore businesses not yet onboarded can ease the transition, reduce compliance risk, and take advantage of cost relief via grants—ensuring they’re ready well before 1 April 2028.