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E-invoicing in Singapore

Singapore is progressively making InvoiceNow mandatory for GST-registered businesses, with requirements expanding to all GST-registered businesses by 2031.

Phased rollout Available with iEDI

At a glance

B2B e-invoicing Mandatory
B2G e-invoicing Voluntary
Infrastructure InvoiceNow/Peppol
Next deadline 1 April 2028

From 1 April 2028, the GST InvoiceNow Requirement extends to new compulsory GST registrants and existing GST-registered businesses with total annual supplies of up to S$200,000.

Key e-invoicing deadlines

1 April 2026
Completed

InvoiceNow requirement expands to new voluntary GST registrants

The GST InvoiceNow Requirement applies to all businesses applying for voluntary GST registration from this date, regardless of incorporation date or business structure. 
1 April 2028
Upcoming

Mandatory rollout expands to more GST-registered businesses

The requirement extends to all new compulsory GST registrants and existing GST-registered businesses with total annual supplies of up to S$200,000. 
1 April 2029
Upcoming

Rollout extends to businesses with supplies up to S$1 million

Existing GST-registered businesses with total annual supplies of up to S$1 million become subject to the GST InvoiceNow Requirement. 
1 April 2030
Upcoming

Rollout extends to businesses with supplies up to S$4 million

Existing GST-registered businesses with total annual supplies of up to S$4 million become subject to the GST InvoiceNow Requirement. 
1 April 2031
Upcoming

All remaining GST-registered businesses brought into scope

Existing GST-registered businesses with total annual supplies above S$4 million become subject to the requirement, completing the phased rollout to all GST-registered businesses in scope. 
Overview

Singapore operates a nationwide e-invoicing network called InvoiceNow, based on the Peppol framework. The network enables businesses to exchange structured electronic invoices directly between accounting and ERP systems.

Singapore is progressively introducing mandatory InvoiceNow requirements for GST-registered businesses. The first requirements took effect for certain newly incorporated businesses from November 2025 and for new voluntary GST registrants from April 2026, with the mandate expanding to existing GST-registered businesses in phases through 2031.

Who must comply

The GST InvoiceNow Requirement applies progressively to GST-registered businesses in Singapore. It initially covers new voluntary GST registrants and will subsequently expand to new compulsory GST registrants and existing GST-registered businesses according to their annual supplies.

From 1 April 2028, the requirement extends to new compulsory GST registrants and existing GST-registered businesses with total annual supplies of up to S$200,000. Further phases in 2029, 2030, and 2031 will bring additional existing GST-registered businesses into scope.

Requirements

Businesses subject to the GST InvoiceNow Requirement must use an InvoiceNow-Ready Solution and transmit prescribed invoice data to the Inland Revenue Authority of Singapore (IRAS) through the InvoiceNow network.

The requirement covers invoice data relating to supplies and purchases and forms part of Singapore's move towards digital GST administration. Businesses should ensure that their accounting or ERP setup can support the required structured data exchange and reporting processes as the mandate becomes applicable to them.

Formats and infrastructure

Singapore's InvoiceNow network is based on the Peppol framework and enables structured invoice data to be exchanged between businesses using different accounting and ERP systems.

The Infocomm Media Development Authority (IMDA) is Singapore's Peppol Authority. Businesses connect to InvoiceNow through accredited Access Point providers and InvoiceNow-Ready Solutions, while the network provides the infrastructure for interoperable electronic document exchange.

How iEDI can help

iEDI supports e-invoicing in Singapore through our connectivity to the required infrastructure. We can connect your existing ERP or business systems to Singapore's e-invoicing ecosystem without replacing the systems you already use.

iEDI can handle the transformation and exchange of structured invoice data, helping businesses automate their electronic invoice flows and prepare for the expanding GST InvoiceNow requirements.

Frequently asked questions

Is B2B e-invoicing mandatory in Singapore?
Singapore is progressively introducing mandatory e-invoicing requirements for GST-registered businesses through the GST InvoiceNow Requirement. The rollout has already started for new voluntary GST registrants and will expand to existing GST-registered businesses in phases through 2031. 
Which businesses are subject to the GST InvoiceNow Requirement?
The requirement is being introduced progressively for GST-registered businesses. From 1 April 2028, it extends to all new compulsory GST registrants and existing GST-registered businesses with total annual supplies of up to S$200,000. Further phases in 2029, 2030 and 2031 will bring additional existing GST-registered businesses into scope. 
What is the next e-invoicing deadline in Singapore?
The next phase takes effect on 1 April 2028. From this date, the GST InvoiceNow Requirement extends to all new compulsory GST registrants and existing GST-registered businesses with total annual supplies of up to S$200,000. 
What is InvoiceNow and does it use Peppol?
InvoiceNow is Singapore's nationwide e-invoicing network and is based on the Peppol framework. It enables structured invoice data to be exchanged directly between businesses using different accounting and ERP systems. The Infocomm Media Development Authority (IMDA) is Singapore's Peppol Authority. 
Does InvoiceNow also report invoice data to IRAS?
Yes. Businesses subject to the GST InvoiceNow Requirement must use an InvoiceNow-Ready Solution to transmit prescribed invoice data to IRAS through the InvoiceNow network. The requirement therefore involves both structured e-invoicing and the transmission of relevant invoice data to the tax authority. 
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