InvoiceNow Accounting System Singapore Guide: Requirements, Benefits and How to Get Started
InvoiceNow is becoming an increasingly important part of digital accounting and tax compliance in Singapore. Businesses that still depend on PDF invoices, email attachments and manual data entry are increasingly looking at e-invoicing to improve efficiency and prepare for Singapore’s GST InvoiceNow requirements.
But what exactly is InvoiceNow, who needs to use it, and how should a business prepare?
This guide explains InvoiceNow in Singapore, how the Peppol network works, the GST InvoiceNow implementation timeline, the benefits for businesses and how WLP can assist with InvoiceNow implementation and accounting support.
What Is InvoiceNow in Singapore?
InvoiceNow is Singapore’s nationwide e-invoicing network based on the international Peppol standard. It allows businesses to exchange structured invoice information electronically between compatible accounting, finance and enterprise systems.
A conventional PDF invoice may be sent by email, but the recipient may still need to download it and manually enter the information into an accounting system. InvoiceNow is designed to reduce this manual process by allowing invoice data to move electronically between connected systems.
InvoiceNow was introduced by the Infocomm Media Development Authority (IMDA) as part of Singapore’s digitalisation efforts. It provides businesses with a common framework for sending and receiving electronic invoices rather than relying on different formats and manual processes.
In simple terms, traditional invoicing generally involves preparing an invoice, converting it into a PDF, sending it by email and potentially requiring the recipient to manually enter the information. With InvoiceNow, structured invoice information can be transmitted through the InvoiceNow network directly between compatible systems.
This can create a more streamlined and automated invoicing workflow.
Is InvoiceNow the Same as Accounting Software?
No. InvoiceNow and accounting software serve different purposes.
InvoiceNow is an e-invoicing network, while accounting software is used to manage financial transactions and accounting records.
Businesses can continue using suitable accounting or ERP software while connecting that system to the InvoiceNow network.
For example, businesses using Xero or another supported accounting platform can implement InvoiceNow through an appropriate InvoiceNow-ready solution or integration. The accounting software manages financial records, while InvoiceNow facilitates the electronic exchange of invoice information.
IMDA provides different options for businesses to connect to the InvoiceNow network, including InvoiceNow-ready accounting and ERP solutions and other integration options.
How Does InvoiceNow Work?
The InvoiceNow process is designed to make electronic invoicing more efficient.
First, a business creates an invoice using its accounting or finance system. The relevant invoice information is then converted into the required structured format and transmitted through the InvoiceNow network using Peppol standards.
The recipient’s compatible system receives the invoice electronically. The recipient can then review, approve and process the invoice as part of its normal accounting workflow.
This approach can significantly reduce the need to download attachments, copy information manually and enter invoice details into accounting software.
For businesses that issue or receive a large volume of invoices, the reduction in repetitive administrative work can be particularly useful.
InvoiceNow vs Traditional PDF Invoicing
A PDF invoice is digital in the sense that it is an electronic document, but it is not necessarily a structured e-invoice.
With traditional PDF invoicing, a business may prepare an invoice, save it as a PDF and send it to the customer by email. The customer may then need to open the document and manually transfer the information into an accounting or enterprise system.
InvoiceNow is different because invoice information is transmitted in a structured format through an e-invoicing network. Compatible systems can receive and process the information without relying entirely on manual data entry.
This distinction is important for businesses considering digital transformation. Simply emailing PDF invoices does not provide the same level of system-to-system automation associated with structured e-invoicing.
Why Is InvoiceNow Important for Singapore Businesses?
InvoiceNow is not simply a technology upgrade. It is increasingly connected to Singapore’s tax administration framework.
Under the GST InvoiceNow Requirement, GST-registered businesses will progressively be required to transmit invoice data to IRAS through InvoiceNow-ready solutions.
IRAS has introduced the requirement in phases, meaning businesses need to identify the implementation date that applies to their circumstances.
For this reason, businesses should not wait until the last minute to investigate InvoiceNow. Reviewing accounting software, GST configurations and internal invoicing processes early can make implementation considerably smoother.
GST InvoiceNow Requirement: Singapore Timeline
The GST InvoiceNow Requirement is being introduced progressively rather than requiring every business to comply on the same date.
The first phase began on 1 November 2025 for companies that voluntarily register for GST within six months of incorporation.
From 1 April 2026, the requirement applies to businesses applying for voluntary GST registration on or after that date.
The next stages focus on existing GST-registered businesses according to their annual supplies. From 1 April 2028, the requirement will extend to new compulsory GST registrants and existing GST-registered businesses with annual supplies of up to S$200,000.
From 1 April 2029, existing GST-registered businesses with annual supplies of up to S$1 million will be brought into the requirement.
From 1 April 2030, the requirement will extend to existing GST-registered businesses with annual supplies above S$1 million and up to S$4 million.
Finally, from 1 April 2031, existing GST-registered businesses with annual supplies above S$4 million will be required to comply.
The relevant annual-supplies thresholds for existing GST-registered businesses are determined based on prescribed accounting periods ending in calendar year 2025.
Because implementation dates can depend on a business’s GST registration circumstances, companies should refer to the latest IRAS guidance when determining their specific obligations.
Who Needs to Prepare for InvoiceNow?
Businesses should begin by reviewing their GST registration status.
If your company is GST-registered, you should determine which phase of the GST InvoiceNow Requirement applies to your business. Companies planning to register for GST should also understand the requirements before submitting their GST registration application.
There are exclusions and specific circumstances under the rules. For example, certain overseas entities and businesses whose GST registration obligation arises wholly from the Reverse Charge regime may be excluded from the requirement.
Because GST and InvoiceNow obligations can vary according to a company’s circumstances, businesses should obtain professional advice if they are uncertain about whether or when the requirement applies.
What Are the Benefits of InvoiceNow?
Less Manual Data Entry
One of the most obvious advantages of InvoiceNow is the potential reduction in manual data entry.
Instead of employees repeatedly copying invoice numbers, customer details, amounts and GST information from documents into accounting software, structured invoice data can be transferred electronically between compatible systems.
This can save administrative time, particularly for businesses handling substantial invoice volumes.
Fewer Data Entry Errors
Manual data entry creates opportunities for mistakes.
An employee may accidentally enter the wrong invoice amount, GST code, invoice number or supplier information. Structured electronic invoicing can reduce some of these risks by transferring data directly between systems.
Businesses should still maintain appropriate accounting controls because automation does not eliminate the need for accurate financial information.
Faster Invoice Processing
Electronic transmission can help reduce delays associated with email attachments, downloads and manual uploads.
Once an invoice is received in a compatible accounting workflow, finance staff can review and approve it without necessarily having to re-enter all the information manually.
More Efficient Accounts Payable
InvoiceNow can help businesses create a more structured accounts payable process.
Instead of receiving invoices in different formats through multiple channels, businesses can establish a more consistent workflow for receiving, reviewing and recording electronic invoices.
This can be particularly helpful for companies that have multiple suppliers or a growing finance function.
Potentially Better Cash-Flow Management
Faster administrative processing can support more efficient invoicing and payment workflows.
InvoiceNow does not guarantee that customers will pay invoices faster, but reducing avoidable processing delays can help businesses manage their receivables more effectively.
Improved Digital Record-Keeping
Structured electronic invoice information can contribute to a more organised accounting environment.
Businesses can integrate invoicing more closely with their accounting processes, making transaction information easier for finance teams to access and manage.
However, businesses must continue to maintain appropriate accounting and tax records. InvoiceNow does not remove existing record-keeping obligations.
How to Set Up InvoiceNow in Singapore
Implementing InvoiceNow involves more than simply activating an e-invoicing feature.
Step 1: Review Your Accounting Software
Start by checking whether your existing accounting or ERP system is InvoiceNow-ready.
Businesses should consider whether their current system can connect to the InvoiceNow network and whether it supports the functions required for their invoicing and GST processes.
IRAS recommends checking the relevant IMDA-accredited InvoiceNow-ready solution providers.
Step 2: Register for InvoiceNow
Once you have selected a suitable solution, the provider or Access Point Provider can assist with the registration process.
Your business will use its Unique Entity Number, commonly known as the UEN, as part of the identification process. The business can then obtain the relevant Peppol ID for electronic invoicing.
Step 3: Review Your Accounting and GST Settings
Before going live, review the information stored in your accounting system.
This can include your company name, UEN, GST registration details, customer records, supplier records, GST tax codes, invoice numbering and chart of accounts.
Cleaning up inaccurate or outdated information before implementation can prevent unnecessary problems later.
Step 4: Configure GST InvoiceNow Submission
Businesses subject to the GST InvoiceNow Requirement need to ensure that their InvoiceNow-ready solution is configured for the required transmission of invoice data to IRAS.
The relevant GST and invoice settings should be reviewed carefully to ensure that information is transmitted correctly.
Step 5: Test the System
Testing should take place before InvoiceNow becomes part of your everyday invoicing process.
Businesses should test invoice transmission, customer information, GST treatment and other relevant transaction scenarios.
It is also useful to establish procedures for dealing with failed transmissions, incorrect invoices, credit notes and other exceptions.
Step 6: Train Your Staff
Technology alone does not guarantee a successful implementation.
Employees responsible for sales invoices, accounts receivable, accounts payable and GST should understand the new process.
Staff should know how to create invoices, receive electronic invoices, review transactions, handle corrections and escalate system or transmission issues.
Can InvoiceNow Work With Xero in Singapore?
Yes. Businesses using Xero can implement InvoiceNow through suitable InvoiceNow-ready solutions and integrations.
For companies already using Xero, the implementation process should include reviewing the existing accounting setup, GST codes, customer information and invoice workflows.
WLP provides Xero and InvoiceNow-related support for Singapore businesses, including assistance with connecting Xero to the Peppol/InvoiceNow network.
Businesses should consider not only whether their accounting software supports InvoiceNow, but also whether the configuration is appropriate for their accounting and GST processes.
How WLP Can Help With InvoiceNow
Implementing a new e-invoicing process can be challenging if your internal team is already managing bookkeeping, GST filing and other accounting responsibilities.
WLP can assist Singapore businesses with InvoiceNow implementation and related accounting services.
WLP provides accounting and bookkeeping services, GST support, Xero-related services and InvoiceNow solutions for businesses in Singapore.
Depending on your requirements, professional support can include reviewing your existing accounting workflow, assisting with InvoiceNow setup, configuring Xero, providing guidance on Peppol registration, reviewing GST-related accounting settings, testing the implementation and supporting your ongoing bookkeeping and accounting processes.
Working with an accounting professional can also help ensure that InvoiceNow is incorporated into your broader financial workflow rather than treated as a standalone software project.
For businesses looking for assistance, you can explore WLP’s accounting and tax services and its InvoiceNow solutions for further information.
InvoiceNow and GST Compliance: What Businesses Should Know
InvoiceNow can support Singapore’s digital tax administration framework, but activating InvoiceNow does not automatically make a business fully GST compliant.
Businesses remain responsible for applying the correct GST treatment, maintaining proper accounting records, retaining supporting documentation and submitting accurate GST returns where applicable.
Companies should also ensure that their accounting information is accurate and that appropriate controls are in place.
IRAS has clarified that transmitting invoice data through InvoiceNow does not remove the obligation for businesses to maintain proper business and accounting records.
In other words, InvoiceNow is a technology and compliance mechanism, not a replacement for proper accounting practices.
Is InvoiceNow Secure?
InvoiceNow operates within Singapore’s Peppol-based e-invoicing framework.
The system uses accredited Access Point Providers and security mechanisms designed to protect information transmitted through the network.
Businesses should nevertheless maintain their own internal security controls. User permissions, accounting-system access and financial information should be managed appropriately to reduce the risk of unauthorised access.
What Should Singapore SMEs Do Now?
If your business has not yet implemented InvoiceNow, preparing early can make the transition easier.
Start by checking your GST registration status and determining whether your business is affected by the GST InvoiceNow Requirement.
Next, review your accounting software and determine whether it is InvoiceNow-ready. If necessary, speak with your software provider or accounting professional about available solutions.
Your business should also review customer and supplier records, GST tax codes and other accounting information before implementation.
Once the appropriate solution has been selected, complete the Peppol registration process, configure the system and conduct testing before using InvoiceNow for your normal business operations.
Finally, make sure your employees understand the new invoicing process and establish procedures for dealing with errors, credit notes and transmission issues.
If your business does not have the internal resources to manage these steps, an accounting firm such as WLP can provide implementation the phased GST InvoiceNow Requirement. The applicable date depends on factors such as GST registration status, registration date and, for existing GST and ongoing accounting support.
Frequently Asked Questions About InvoiceNow Singapore
Is InvoiceNow mandatory in Singapore?
InvoiceNow is becoming mandatory for affected GST-registered businesses under the phased GST InvoiceNow Requirement. The applicable date depends on factors such as GST registration status, registration date and, for existing GST-registered businesses, annual supplies.
Is InvoiceNow the same as e-invoicing?
InvoiceNow is Singapore’s nationwide e-invoicing network. It uses the Peppol standard to facilitate structured electronic invoice exchange between connected businesses.
Do I need accounting software to use InvoiceNow?
Businesses generally need an InvoiceNow-ready accounting or finance solution, or an appropriate enterprise integration through an accredited Access Point Provider.
What is a Peppol ID?
A Peppol ID is an identifier used to identify a business or organisation on the Peppol e-invoicing network. It enables businesses to exchange electronic invoices with other connected entities.
Can small businesses use InvoiceNow?
Yes. InvoiceNow can be used by businesses of different sizes, including SMEs. Businesses can select an appropriate InvoiceNow-ready solution based on their transaction volume, accounting requirements and budget.
Does InvoiceNow replace my accountant?
No. InvoiceNow facilitates electronic invoice transmission and can automate parts of the invoicing process, but businesses may still require professional assistance with bookkeeping, GST, financial reporting, tax compliance and accounting controls.
Can WLP help with InvoiceNow?
Yes. WLP provides accounting, bookkeeping, GST, Xero and InvoiceNow-related services for Singapore businesses. Its team can assist with digital accounting setup and the transition towards InvoiceNow-enabled workflows.
Final Thoughts: Prepare Early for InvoiceNow
InvoiceNow is changing the way Singapore businesses manage electronic invoicing.
For businesses that still rely heavily on manual invoice processing, adopting structured e-invoicing can reduce repetitive administrative work, improve the flow of financial information and create a more efficient accounting process.
The GST InvoiceNow Requirement also means that affected businesses need to pay attention to their implementation timeline and prepare before their mandatory compliance date.
Rather than waiting until the deadline, businesses can start by reviewing their accounting software, cleaning up financial data and understanding how InvoiceNow fits into their GST and accounting processes.
If you use Xero or another accounting system and are unsure how to implement InvoiceNow, WLP can help with InvoiceNow setup, Xero configuration, accounting workflows, GST-related processes and ongoing accounting support.
For Singapore businesses, getting prepared early can make the transition to InvoiceNow significantly smoother while helping your finance function become more digital and efficient.