IRP Providers List in India 2026: All GSTN-Authorized Invoice Registration Portals

The e-invoicing system in India has changed the way businesses make and send invoices for GST. This system has main parts, including Invoice Registration Portals, which generate Invoice Reference Numbers and allow invoices to be checked quickly.

Enterprises and small enterprises need to understand the Invoice Registration Portal system in order to ensure that GST e-invoicing operates well.

Key Takeaways

• ClearTax, IRIS, Cygnet, EY and NIC are some of the IRPs that are working to make it easy for businesses to meet the regulations. 
• Beginning in August 2023, all companies with an AATO above Rs. 5 crore are required to generate e-invoices through an authorised IRP.
• According to the GST law, a B2B invoice from a recognised IRP that lacks an IRN is legally void.
• Private IRPs provide additional value through ERP integration, reconciliation tools, and committed support; NIC IRP is free to use.
• Businesses with AATO above Rs. 10 crore must report invoices to IRP within 30 days of the invoice date.

What is an Invoice Registration Portal (IRP)?

In India, there is a tax system called the GST framework. The government has a portal, like a website, called an IRP. Companies can use the IRP to upload invoices for the things they sell to businesses. When they do this, they get a number called an IRN. This IRN makes the invoice a real and legal document under the GST rules. The invoice also includes a digital signature and a QR code, which is like a special barcode, and together with the IRN, these make the invoice legally valid under the GST statute and the IRP system.

How does the IRP System Work?

When a taxpayer generates an invoice in their ERP or accounting software, the invoice data is sent to the IRP in a standard JSON format. The IRP then:

• Validates the invoice data against GST rules
• Checks for duplicate invoice numbers
• Generates a unique IRN (a 64-character hash)
• Digitally signs the invoice using the IRP's private key.
• Generates a QR code embedding key invoice details
• Returns the signed invoice and QR code to the supplier
• Shares the invoice data in real-time with the GST portal and e-way bill system

Who Must Generate e-Invoices in India?

E-invoicing is mandatory for GST-registered businesses whose Aggregate Annual Turnover (AATO) exceeds the threshold. The mandate has been progressively expanded:

Current applicability (2025)

For B2B transactions, exports, supplies to SEZs, and credit/debit notes, all GST-registered companies having an AATO of more than Rs. 5 crore are required to create electronic invoices. Currently, businesses below this value are exempt; however, a further reduction in the threshold is anticipated.

List of GSTN-Authorised IRP Providers in India

Originally, the National Informatics Centre (NIC) was the sole IRP in India. In March 2023, GSTN expanded the ecosystem by authorising four private companies as additional IRPs. Indian businesses now have five IRP options to choose from:

How to Choose the Right IRP for Your Business

The five approved IRPs that are currently accessible can be daunting. This useful framework will help you make your choice:

1. For small businesses and startups (AATO Rs. 5–20 crore)

Start with NIC IRP (einvoice1.gst.gov.in and einvoice2.gst.gov.in). It is free, well-documented and sufficient for businesses with moderate invoice volumes. No integration costs or subscription fees.

2. For growing businesses with ERP systems (AATO Rs. 20–100 crore)

Consider ClearTax IRP or Cygnet IRP. Both offer seamless ERP connectors for SAP, Oracle, and Tally, as well as reconciliation tools that significantly reduce manual GST filing effort.

3. For large enterprises and solution providers (AATO above Rs. 100 crore)

Evaluate ClearTax IRP or IRIS IRP for their advanced API capabilities, bulk processing, and enterprise support. If your business has both advisory and compliance needs, EY IRP is worth considering.

Key Questions to Ask When Evaluating an IRP:

1. Is there a smooth integration of this platform with your ERP or accounting software?
2. Will the integration result in any lagging or system crashes?
3. Are features like automated correction, real-time alerts for errors, and detailed audit trails available?
4. Does the vendor provide GSTN along with internal book reconciliation integration?
5. Can multi-GSTIN management and evolving regulatory requirements be handled by the solution?