A Guide to e-Invoicing and the GST InvoiceNow Requirement

In 2019, the Infocomm Media Development Authority (IMDA) introduced a nationwide e-invoicing initiative, designed to help businesses improve efficiency, reduce costs and see faster payments. 

Following the introduction of this initiative, in 2024, the Inland Revenue Authority of Singapore (IRAS) announced the GST InvoiceNow requirement. This requires new GST registered businesses to transmit invoice data directly to the IRAS via the InvoiceNow network.

Understanding what the GST InvoiceNow Requirement means for your business is key to meeting the mandates and staying compliant with an InvoiceNow-ready solution. In this guide we’ll explore how InvoiceNow works, what the requirements are, how your business can benefit, and how you can implement an InvoiceNow-ready solution.

How InvoiceNow works

Based on the international Peppol standard, InvoiceNow allows businesses in Singapore to send and receive invoices directly between accounting systems. By eliminating the need for manual data entry, InvoiceNow helps streamline B2B transactions, reduce errors and accelerate payments, making invoicing more efficient and compliant.

Understanding the GST InvoiceNow requirement

Under the GST InvoiceNow requirement, affected businesses are required to transmit a copy of their invoice data to the IRAS, as well as between suppliers and customers. This requirement is being implemented progressively, with mandatory adoption having started in late 2025.

GST InvoiceNow requirement timelines

The benefits of e-invoicing with InvoiceNow

As invoices are used widely by businesses across Singapore, implementing an InvoiceNow-ready solution can bring the following benefits:

Faster payments

InvoiceNow leverages a single solution for all parties, meaning data can be transmitted directly between systems so customers can make payments faster.

Reduced errors and improved productivity

InvoiceNow-ready solutions automate the population and transmission of invoice data, eliminating the need for manual data entry and the risk of human error.

Better compliance

With an InvoiceNow-ready solution, businesses can expect streamlined compliance efforts, with auto-alerts for wrongful GST charging, secure transmission through the InvoiceNow network, and automated data transmission.

Implementing an InvoiceNow-ready solution

In order to comply with the GST InvoiceNow requirement, affected businesses will need to adopt and implement an InvoiceNow-enabled solution. These solutions, like Intuit QuickBooks, enable businesses to seamlessly send and receive e-invoices between accounting systems.

Streamline e-invoicing compliance with Intuit QuickBooks

With mandatory adoption of the IRAS GST InvoiceNow requirement already underway, ensuring your business is prepared and using an InvoiceNow-ready system is key to staying compliant.

Intuit QuickBooks has partnered with Fonoa, a global leader in tax automation, to deliver a world class e-invoicing solution designed to help Singaporean businesses and accountants work efficiently and stay compliant. 

By integrating Fonoa’s powerful tax engine directly into QuickBooks, we’ve automated compliance—ensuring your invoices meet local standards every time for total peace of mind. This solution also utilises a highly secure, encrypted network, meaning sensitive business information and transaction history is protected by enterprise-grade security.

We’re currently working hard to bring this e-invoicing solution to you so your business is ready for the next phase of GST InvoiceNow requirements. Stay tuned for more information coming soon.