InvoiceNow Singapore | Step-By-Step Setup For Peppol-Compliant E-Invoicing

For SMEs, especially GST-registered businesses preparing for digital invoice submission, InvoiceNow setup of Singapore Peppol work is becoming a practical finance task. InvoiceNow is Singapore’s nationwide e-invoicing network. It runs on the open Peppol framework. This allows businesses to send invoices directly between finance systems in a structured digital format.

This means InvoiceNow is not just a PDF invoice sent by email. It is a system-to-system invoice exchange, where invoice data moves through approved software and Access Point providers.

What Is InvoiceNow?

InvoiceNow helps businesses send and receive e-invoices through the Peppol network. The main benefit is cleaner invoice processing. Instead of manually downloading PDFs, keying invoice data, and chasing missing details, the invoice can flow directly between accounting systems.

For SMEs, this can reduce admin work, improve invoice tracking, and make finance records cleaner. It also matters for GST because IRAS is rolling out the GST InvoiceNow Requirement in phases. GST-registered businesses will need to submit invoice data to IRAS through InvoiceNow-Ready Solutions according to the relevant implementation timeline. 

Why SMEs Should Set It Up Early

Many companies wait until compliance becomes mandatory. This presents a risk because an InvoiceNow setup can affect your accounting software and customer records. It may also alter invoice templates, GST coding, credit notes, and internal approval steps.

IRAS has announced a new mandate for all new voluntary GST registrants. Those applying on or after 1 April 2026 must comply with the GST InvoiceNow Requirement. Existing GST-registered businesses follow later under the phased timeline. 

A SME that prepares early can test invoice flow before filing pressure begins.

InvoiceNow Setup at a Glance

How To Register InvoiceNow Singapore

It usually starts with your accounting or finance software. IRAS advises businesses using off-the-shelf solutions to perform a preliminary check. 

First, ensure your preferred solution is on IMDA’s accredited InvoiceNow-Ready Solution Provider list. Next, the business should approach their solution provider or Access Point provider. They must register in the SG Peppol Directory using their UEN to obtain a Peppol ID.

For companies using in-house enterprise systems, IMDA says they should connect through an IMDA-accredited Access Point provider. 

E-Invoicing Singapore Step By Step

A practical setup flow looks like this:

• Check your current accounting software and confirm if it supports InvoiceNow.
• Choose an InvoiceNow-Ready Solution Provider or an accredited Access Point.
• Register the business with its UEN and obtain a Peppol ID.
• Enable InvoiceNow inside the accounting system.
• Review GST codes, invoice fields, customer details, and credit note flow.
• Send a test invoice and confirm it appears correctly at the receiving end.
• Train the team on when to use InvoiceNow, PDFs, credit notes, and GST review.

This is simple in theory, but each step needs clean data. Wrong customer UENs, old invoice templates, unclear GST codes, or poor product descriptions can create issues later.

Peppol Access Point Singapore IMDA

A Peppol Access Point Singapore IMDA provider is the connector that links your business system to the InvoiceNow network. Think of it as the approved digital bridge. Your accounting system sends invoice data through the Access Point. The receiver’s system then receives it through their own Access Point.

The SG Peppol Directory assists businesses in searching for Singapore entities registered on the network. This can be done using either a company name or a UEN. Successful searches show company names, Peppol IDs, and the Peppol document types they can receive. 

This is useful before sending invoices to key customers or suppliers.

InvoiceNow Xero QuickBooks Integration

InvoiceNow Xero QuickBooks integration depends on the provider and setup route. IMDA’s InvoiceNow-Ready Solution Provider list includes Xero and QuickBooks-linked providers, among many other accounting and ERP options. 

SMEs should not assume the feature is active just because the software name appears on a list. The safer approach is to ask the vendor these questions: Is InvoiceNow enabled for this account? Does it support GST InvoiceNow submission? Can it handle credit notes and debit notes properly? Does it validate supplier GST registration numbers? Can it export reports for GST review?

What InvoiceNow Does Not Do

InvoiceNow does not magically clean poor accounting records. It also does not turn a PDF or paper invoice into a Peppol invoice by itself. According to the IRAS FAQ, Access Point Providers cannot convert PDF copies or paper invoices into Peppol format. This means these documents cannot be transmitted to IRAS through the network. Businesses need to record and send invoice data through the required submission method. 

This means SMEs still need proper invoice entry, tax coding, approval checks, and document control.

Common Mistakes SMEs Should Avoid

The biggest mistake is treating InvoiceNow as a switch that can be turned on at the last minute. It is better to test early.

Avoid these issues:

• Choosing software without checking InvoiceNow readiness.
• Registering for GST without checking InvoiceNow duties.
• Using PDF invoices and assuming they count as Peppol invoices.
• Not checking customer UEN or Peppol ID before sending.
• Ignoring credit notes, refunds, and wrong GST charges.
• Leaving setup only to the software vendor with no internal review.

Conclusion

InvoiceNow setup Singapore Peppol planning works best when software, Peppol registration, GST coding, and finance workflows are reviewed together. SMEs should treat InvoiceNow as part of a cleaner accounting system, not only a compliance box.

A good e-invoicing setup becomes easier when records, tax codes, and software decisions are planned properly. Arnifi’s expert team assists companies in building the necessary infrastructure. With this support, SMEs can confidently handle everything from InvoiceNow and GST records to long-term finance operations.

FAQs

1. What Is InvoiceNow In Singapore?

InvoiceNow is Singapore’s nationwide e-invoicing network. It uses the Peppol framework to send invoices directly between finance systems in a structured digital format. 

2. How Do I Register For InvoiceNow?

You can register through an InvoiceNow-Ready Solution Provider or an accredited Access Point provider. The provider registers your business in the SG Peppol Directory using your UEN and helps you obtain a Peppol ID. 

3. Is InvoiceNow Mandatory For GST-Registered Businesses?

Yes, but the rollout is phased. New voluntary GST registrants applying on or after 1 April 2026 must comply immediately. Existing GST-registered businesses will follow later, according to IRAS timelines.

4. Can I Send PDF Invoices Through An Access Point?

No. IRAS states that Access Point Providers cannot convert PDF or paper invoices into Peppol format for IRAS transmission. The invoice data needs to be recorded and sent through the required method.