Regulatory updates - Singapore

As part of the Committee of Supply (COS) 2026 announcements, the Singapore Government and the Inland Revenue Authority of Singapore (IRAS) confirmed that the GST InvoiceNow requirement will be progressively extended to all GST‑registered businesses by April 2031.

InvoiceNow, Singapore's nationwide e-invoicing network built on the Peppol standard, allows businesses to transmit invoice data directly to IRAS, supporting the country's broader strategy to digitalize tax compliance and improve GST data quality.

The implementation will follow a phased timeline based on business size:

• From 1 November 2025: Newly incorporated companies with voluntary GST registration
• From 1 April 2026: All new voluntary GST registrants
• From 1 April 2028: New compulsory GST registrants and existing businesses with annual taxable supplies up to 200,000 SGD (138,000 EUR) 
• From 1 April 2029: Existing businesses with annual taxable supplies up to 1 million SGD (690,000 EUR)
• From 1 April 2030: Existing businesses with annual taxable supplies up to 4 million SGD (2.76 million EUR)
• From 1 April 2031: All remaining GST registered businesses 

To ease the transition, the Government will provide funding support of up to 1,000 SGD (690 EUR) for SMEs and up to 5,000 SGD (3,450 EUR) for larger businesses. SMEs can also access InvoiceNow Ready Solutions free of charge until March 2031.

This initiative represents Singapore's move toward transaction-level GST reporting, aiming to strengthen compliance and modernize tax administration in alignment with global e-invoicing trends.

GST-registered businesses will be required to send invoice data to IRAS through Accredited Access Points. This will be done in phases, starting with mandatory participation of businesses that register for GST voluntarily.

Timelines

• Since November 1, 2025, newly incorporated companies that register for GST voluntarily must start transmitting invoice data to the IRAS through an Accredited Access Point. Newly incorporated companies refer to companies that are incorporated within 6 months from the time they submit their application for GST registration to Inland Revenue Authority of Singapore (IRAS).

• Not included in November phase:
  • Businesses where the length of time between incorporation date and GST registration exceeds 6 months. For example, Company B was newly incorporated on May 9, It has applied for voluntary GST registration on Nov 10, 2025. As Company B’s incorporation date (May 9, 2025) is more than 6 months before the date of its application for voluntary GST registration, it is not mandatory for Company B to adopt the GST InvoiceNow Requirement for now.
  • New voluntary GST registrants that are limited liability partnerships, sole-proprietorships and partnership businesses, the requirement will be implemented from April 1, 2026.

• From April 1, 2026, for all new voluntary GST registrants, regardless of incorporation date or business constitution.

Businesses considering voluntary GST registration can read the following link, which outlines factors to consider before registering voluntarily for GST.

There are plans to progressively extend mandatory participation to new compulsory GST registrants and remaining GST-registered businesses. IRAS is expected to announce upcoming timelines.

Participants in the InvoiceNow network will have new functionalities to facilitate invoice automation. Advanced Ordering will support purchase orders, their variances, and cancellations. A new document specification, SG BIS Order Balance, has been created to complement the features from Advanced Ordering.

The approval, picking, and invoicing processes can be significantly automated for sellers. InvoiceNow's new functionality will allow vendors to create invoices directly from purchase orders received from public entities. For procuring agencies, approval and accounting of invoices can be automated, and ordering can be structured using catalogues.

The main activities supported by this implementation include:

• Initial order from buyer — supports the structured ordering of goods or services using free text or identifiers. The ordered products may originate from a paper or electronic catalogue;
• Change of order from buyer — allows modifications based on new requirements or other reasons. Changes must be completed before the order is prepared for delivery. The seller can either accept or reject these changes;
• Change of order from seller — enables modifications to previously accepted orders, such as changes in delivery dates or product replacements. The buyer can either accept or reject these changes;
• Cancellation of order from buyer — permits cancellations before the order is prepared for delivery. The buyer and seller may establish agreed-upon deadlines for cancellation. The seller can either accept or reject the cancellation;
• Cancellation of order from seller — allows cancellations due to lack of delivery capacity or other reasons. As noted above, the buyer and seller may have agreed-upon deadlines for cancellation. The buyer must confirm receipt of the cancellation.

Government vendors will be the first to access this feature, as government systems will be ready for trials beginning September 2025. More information can be found in BIS Advance Ordering 3.0 and Order Balance v1.