E-invoicing made
seamless with Link4!

Link4 is an award-winning, Peppol-certified Procure-to-Pay platform in Singapore, helping governments and enterprises digitize their invoicing, procurement, and payment processes across the globe.

Through seamless integration with leading ERP and accounting systems, Link4 enables organizations to send and receive Peppol eInvoices and purchase orders, manage order responses, enable advanced ordering, and automate accounts payable workflows via the secure Peppol network.

Reduce manual work, improve accuracy, accelerate payments, and optimize procurement with smarter eInvoicing and Procure-to-Pay automation.

Watch Link4 in Action!

Roadmap for the GST InvoiceNow Requirement

GST-registered businesses will be required to onboard InvoiceNow and submit invoice data directly to IRAS via the InvoiceNow network. This will be mandated in phases.

Implementation Date and Businesses Involved

	1 November 2025	Companies that register for GST voluntarily within 6 months of incorporation date
	1 April 2026	All new voluntary GST registrants, regardless of their incorporation date or business structure
	1 April 2028	All new compulsory GST registrants Existing GST-registered businesses with total annual supplies* ≤ S$200,000
	1 April 2029	Existing GST-registered businesses with total annual supplies* ≤ S$1,000,000
	1 April 2030	Existing GST-registered businesses with total annual supplies* ≤ S$4,000,000
	1 April 2031	Existing GST-registered businesses with total annual supplies* > S$4,000,000

*Total annual supplies refer to the total value of standard-rated, zero-rated and exempt supplies made in all the prescribed accounting periods ending in calendar year 2025.

Link4 Offers a Range of Solutions

For Government

For Government Suppliers

For Large Enterprise Clients

For Small and Medium Businesses

For Accountants and Bookkeepers

For Software Providers

Link4 DataXtract

AI-Native Intelligent Document Processing

Learn More

The e-invoicing Solution for Government Government Suppliers Large Enterprises Small and Medium Businesses Software Providers Accountants and Bookkeepers

Link4's Out-of-the-Box Products

We are committed to transforming your business through our leading-edge product solutions

Link4 e-invoicing (Peppol)

Connect with your customers through a worldwide established E-invoicing framework.

Link4 InvoiceExpress

Not using a Cloud Accounting system? Generate and send invoices to your customers through the Link4 portal.

Connected Software Systems

Connect your existing Cloud Accounting software to Link4 in 2 minutes or less!

Don't have a Cloud Accounting system?
We can help!

Try out Link4 InvoiceExpress!

ERP Integration

Link4 can easily provide seamless custom integration for your existing ERP systems.

OCR Integration

Link4 partners with OCR solution providers to offer a smarter invoice workflow for your business, enabling an additional invoicing channel.

Experience the Benefits of e-invoicing Right Now!

Try for Free!

A Snapshot of Our Clients

Great to see so many amazing organisations benefiting themselves with the latest technology. Through Link4 solutions, we seek to continue building lasting customer relationships.

A Snapshot of Our Resellers and Partners

We are proud to collaborate with incredible organizations that are driving innovation with the latest technology. Through Link4 solutions, we strive to foster strong and lasting partnerships for continued success.

Testimonials

Your words fuel us to keep striving for the best solutions possible.

Link4 works great, it's efficient and allows more time to get other tasks done in the office.

Pam Madytianos

2 Peas Pty Ltd

Link4's team ensured a seamless integration with NetSuite, enabling us to send and receive invoices efficiently and with ease. The solution has significantly improved our finance operations, saving time and reducing manual effort.

We value Link4 as a trusted e-Invoicing partner and appreciate their reliability and support throughout our journey. We would confidently recommend Link4 to other organizations seeking a robust and compliant e-Invoicing solution.

Pinnie Ng

Head of Accounting (Asian Trails Malaysia)

“Link4 is a great tool with its user-friendly, easy installation and configurable features.”

Aboorvaraja R.

S. Biztalk Consultant

It imports the invoice and sends you a notification email with the invoice number and the job code which is really good for our system.

Tatijuana Thomas

AGS Commercial Pty Ltd

“Link4 is efficient in processing invoices as it inputs them automatically into the accounting software. It saves time and paper as I don’t need to print and re-enter billing information. It’s as simple as check, approve and pay.”

Peta M.

Automotive Owner (self-employed)

“It’s good that the files are transferred directly into Xero so, there is no double entering of invoices.”

Tracey G.

Mechanical or Industrial Engineering, Self Employed

“Simplifies the overall process. Saves user's time via automation. Intuitive to use and not over complicated.”

Dave S.

Engineering Manager

“The support provided by Link4 in helping AAL Shipping to implement e-invoicing through the InvoiceNow network has been outstanding. From the outset, Link4 demonstrated a good understanding of our operational needs, offering integration with our accounting system that is as seamless as possible system wise.”

AAL Shipping (AAL)

“The implementation process was well-supported with dedicated client relation and a technical team guiding us through each step. Link4 worked well with our internal IT resources and their commitment to regular project meetings has made them a reliable and proactive partner.”

AAL Shipping (AAL)

“Link4 provided proactive support in onboarding as many local suppliers as possible within our supplier landscape. We value our partnership with Link4 and look forward to further continued collaboration.”

AAL Shipping (AAL)