Understanding InvoiceNow and Its Legal Mandate
In its FY 2025/26 Annual Report, IRAS revealed a key initiative: all GST-registered businesses will be required to onboard InvoiceNow, Singapore’s national e-invoicing network. (iras.gov.sg) Beginning in April 2028, this requirement will be enforced in phases, with full participation by April 2031. (iras.gov.sg) E-invoicing has been introduced in recent years to streamline billing, improve accuracy, and reduce opportunities for tax avoidance.
Action Steps for Businesses
To prepare, GST-registered businesses should:
- Conduct a technical readiness audit to ensure systems can integrate with InvoiceNow. Vendor compatibility and data flows must be validated.
- Review existing invoicing and GST compliance processes; identify gaps in capturing all input/output tax properly.
- Train staff and update standard operating procedures for invoice issuance, record-keeping, and audit trails.
- Seek early adoption if possible; for those with high transaction volumes, doing so may yield efficiency gains sooner.
Compliance & Risk Management
The shift toward InvoiceNow strengthens the GST Tax Governance Framework (TGF). Under this framework, tax governance policy publication, internal tax risk management, and procedural adherence are mandatory. (iras.gov.sg) Non-compliance with either data submission or governance obligations can lead to administrative penalties or reputational risk.
Case Example
A medium-sized Singapore firm with RM -> SGD-based sales over multiple GST-registered subsidiaries currently uses manual invoicing. From April 2028, failing to use InvoiceNow may invalidate output GST claims. By implementing suitable e-invoicing software and training staff before 2028, the company can leverage productivity gains and avoid disruptions.
Broader Tax Governance Implications
The e-invoicing requirement ties into IRAS’s push for more transparency and risk-based assurance. Under the CRS/DTT/BEPS landscape, documentation, reporting, and governance are under tighter scrutiny. The InvoiceNow system feeds into this ecosystem, supporting audit trails, matching inputs/outputs, and preventing GST leakage.
Takeaway: All GST-registered Singapore businesses need to proactively plan for InvoiceNow compliance, including systems & policy readiness, staff training, and governance enhancements—well before April 2028.