What is e-invoice software?

e-Invoice software creates a GST sale invoice and registers it with the government’s Invoice Registration Portal (IRP) for you, then puts the details the portal returns — the IRN, Ack No and a signed QR code — onto the invoice. Without it you would have to prepare the invoice, upload it to the portal separately, and copy the results back by hand.

Who needs e-invoicing under GST?

e-Invoicing applies to B2B sales by businesses whose annual turnover crosses the notified threshold — currently ₹5 crore. The threshold has been lowered several times since e-invoicing began, so confirm the limit that applies to you before assuming you are outside it.

How do I generate an e-invoice with IRN?

Create the sale invoice for your B2B customer as usual, then choose Generate e-Invoice. KhataBuddy validates it, registers it on the government portal, and adds the IRN, Ack No and signed QR code to the invoice automatically.

Do I have to upload invoices to the IRP portal separately?

No. That is the whole point of using e-invoice software. KhataBuddy talks to the portal for you, so you never log into the IRP separately, prepare a JSON file, or copy an IRN back onto your bill by hand.

The IRN (Invoice Reference Number) is the unique reference the Invoice Registration Portal returns once it accepts your invoice. Along with the Ack No and a digitally signed QR code, it is what makes the invoice valid under the e-invoicing rules, and it has to appear on the copy your buyer receives.

Can I generate e-way bills and e-invoices from the same software?

Yes. Both run on the same registration in KhataBuddy, so once you are set up for one you can do the other — e-invoices for B2B sales, and e-way bills for goods in transit — without configuring anything twice.

What do I need to set up before generating e-invoices?

There is a one-time registration: on the government e-way bill portal, go to Registration → For GSP, verify by OTP, and add Chartered Information Systems Private Limited as your GSP. You enter those credentials in KhataBuddy once, and they cover both e-invoices and e-way bills.

Which KhataBuddy plan includes e-invoicing?

e-Invoice generation is available on the Ultimate plan, and each generation uses wallet credits. See the pricing page for the current plan details and what is included.

Does the IRN and QR code print on the invoice PDF?

Yes. Once the invoice is registered, the IRN, Ack No and the signed QR code are added to the invoice itself — so the PDF you print, email or send on WhatsApp already carries everything the buyer needs.

What happens if there is a mistake in the invoice data?

KhataBuddy validates the invoice against the portal’s rules before sending it, so most problems are caught up front and shown to you to correct. That matters because the government portal is strict about formats, and it is far easier to fix an invoice before registering it than after.

GST Compliance · e-Invoicing

e-Invoice Software

Register your B2B invoices on the government portal in one click — KhataBuddy does the uploading for you, and the IRN, Ack No and signed QR code print on your invoice automatically. No separate portal, no JSON files.

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One-click IRN + QR No separate IRP upload e-Way bills included Prints on your invoice

B2B sale invoiceINV-2026-118

Verma Industries Pvt Ltd

GSTIN 27PQRSX6789K1Z2

Taxable value₹1,20,000

IGST 18%₹21,600

Total₹1,41,600

Registered on the GST portal

e-Invoice generated

Signed QR

IRN

a5f3c1e9b47d…2f8e6114ac9d

Ack No

1120260118

Date

21-08-2026

Printed on invoice e-Way bill ready

What is e-invoicing, and who needs it?

Under GST, certain sale invoices must be registered with the government before they are treated as valid. You send the invoice details to the Invoice Registration Portal (IRP), and it returns an IRN (Invoice Reference Number), an Ack No and a digitally signed QR code — all of which have to appear on the copy you give your buyer.

It applies to B2B sales by businesses whose annual turnover crosses the notified threshold — currently ₹5 crore. That limit has been lowered several times since e-invoicing started, so check the threshold that currently applies to you rather than assuming you are outside it.

Doing it by hand is the slow part

Without e-invoice software you make the bill, log into the IRP separately, upload the invoice, then copy the IRN and QR back onto your paperwork — for every B2B invoice. Software removes all of those steps except making the bill.

How it works

Generate an e-Invoice in three steps

From a normal sale invoice to a registered e-invoice with IRN and QR — without leaving KhataBuddy.

Make the sale invoice as usual

Bill your B2B customer the normal way in KhataBuddy — an e-invoice is generated from a sale invoice, not typed again from scratch.

Click Generate e-Invoice

KhataBuddy validates the invoice and registers it on the government portal for you. No separate uploading, no JSON files, no second website to log into.

IRN and QR print on the bill

The IRN, Ack No and the signed QR code returned by the portal are added to your invoice automatically — ready to print or share on WhatsApp.

One-time setup: register KhataBuddy’s GSP on the government e-way bill portal and enter those credentials once — they cover both e-invoices and e-way bills.

What you get

e-Invoicing built into your billing

Not a bolt-on utility — the same software that raises the invoice registers it.

One-click IRN generation

Register a B2B invoice on the Invoice Registration Portal straight from the invoice you just made — no manual upload step.

Signed QR code on the invoice

The government-signed QR code and IRN are placed on the invoice automatically, exactly as the rules require.

Checked before it is sent

Your invoice is validated against the portal’s rules first, so errors are caught before the invoice goes out rather than after.

e-Way bills from the same setup

One registration covers both — generate e-way bills for goods in transit without configuring anything a second time.

Prints on every invoice design

The IRN and QR block appears on whichever invoice template you use, and on the PDF you share with your buyer.

Works with the rest of your books

e-Invoicing sits inside the same software doing your billing, inventory and GST returns — nothing to export or reconcile.

e-Invoices and e-way bills, one setup

Both documents are registered through the same government-approved provider, so in KhataBuddy they share one registration and one screen. Set it up once and you can register B2B invoices and raise e-way bills for goods in transit — including from your phone.

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e-Invoice Software — FAQs

Common questions about GST e-invoicing, IRN generation and the IRP portal.

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