Singapore Expands Mandatory GST InvoiceNow Reporting to All Registered Businesses

During the Committee of Supply (COS) 2026, the Singapore Government and the Inland Revenue Authority of Singapore (IRAS) confirmed the progressive extension of the GST InvoiceNow requirement. By April 2031, the mandate will apply to all GST-registered businesses operating within the jurisdiction. This expansion is expected to bring approximately 90,000 additional businesses onto the national e-invoicing network, which currently serves over 63,000 users.

Previously limited to new voluntary registrants, the mandate will now phase in existing entities based on their annual supply values. This measure shifts Singapore toward transaction-level reporting to digitalize tax compliance and improve data accuracy.

The InvoiceNow Framework

InvoiceNow is a Singapore’s nationwide electronic invoicing network, built upon the international Peppol standard. Under this mandatory framework, in-scope businesses must utilize approved InvoiceNow solutions to automatically transmit structured digital invoice data directly to IRAS, completely replacing unstructured formats such as PDFs for statutory reporting.

Phased Implementation Timeline

The mandate will be enforced in distinct phases, categorizing businesses by their registration status and total annual supplies. For existing entities, the statutory compliance date is determined by total annual supplies, encompassing standard-rated, zero-rated, and exempt supplies, calculated across all prescribed accounting periods ending in 2025.

The implementation schedule is as follows:

• November 1, 2025: Newly incorporated companies voluntarily registering for GST within six months of incorporation.
• April 1, 2026: All new voluntary GST registrants.
• April 1, 2028: All new compulsory GST registrants, and existing businesses with annual taxable supplies ≤ SGD 200,000 (approx. EUR 138,000).
• April 1, 2029: Existing GST-registered businesses with total annual taxable supplies up to SGD 1 million (approx. EUR 690,000).
• April 1, 2030: Existing GST-registered businesses with total annual taxable supplies up to SGD 4 million (approx. EUR 2.76 million).
• April 1, 2031: All remaining GST-registered businesses with total annual taxable supplies exceeding SGD 4 million.

Please note that the mandate applies immediately upon registration for all new voluntary registrants from April 1, 2026, and for all new compulsory registrants from April 1, 2028, regardless of their specific revenue threshold.

Financial Support and Next Steps

To facilitate a seamless technical transition, the Singaporean Government is providing financial assistance, including funding support of up to SGD 1,000 (EUR 690) for small and medium-sized enterprises and up to SGD 5,000 (EUR 3,450) for larger corporations. Furthermore, SMEs are eligible to access InvoiceNow Ready Solutions at no cost until March 2031.

IRAS will formally notify businesses registered prior to 2026 of their specific compliance deadlines by mid-2026. Taxpayers can currently use an official IRAS Excel calculator to determine their applicable compliance date. The tax authority actively encourages early adoption, enabling businesses to secure system readiness and test data transmission before their statutory deadlines. Further technical and regulatory specifications will be published in a forthcoming edition of the e-Tax Guide.

There’s more you should know about e-invoicing in Singapore – learn more about the new and upcoming regulations.