Rule 48(5): An Invoice Without an IRN Is Not an Invoice

Rule 48 explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.

Most compliance failures produce a defective document. This one produces no document.

Rule 48(4) requires notified classes of registered persons to prepare the invoice by including the particulars contained in FORM GST INV-01 and obtaining an Invoice Reference Number by uploading the information on the Common GST Electronic Portal. Rule 48(5): "Every invoice issued by a person to whom sub-rule (4) applies in any manner other than the manner specified in the said sub-rule shall not be treated as an invoice." Not invalid. Not defective. Not an invoice.

What follows from "not an invoice"

For the recipient. Section 16(2)(a) conditions credit on possession of a tax invoice or debit note issued by a supplier registered under this Act, or such other tax paying documents as may be prescribed. If the document is not an invoice, the condition is not satisfied. The credit fails at the first gate, and the proviso to Rule 36(2) — which rescues invoices missing some particulars — has nothing to operate on. Rule 36: which documents support a credit claim →

For the supplier. The supply has been made without issuing a tax invoice, contrary to s.31(1). That is an offence under s.122(1)(i) — supplying goods or services without issue of any invoice or with an incorrect or false invoice — attracting penalty of ₹10,000 or the tax evaded, whichever is higher.

For the movement. Rule 138A requires the person in charge of a conveyance to carry the invoice or bill of supply or delivery challan. Where the document is not an invoice, the consignment is unaccompanied, exposing it to s.129 detention.

For reporting. E-invoices auto-populate GSTR-1. A supply for which no IRN was generated does not auto-populate and has to be added manually, creating a permanent reconciliation difference between the e-invoice register and GSTR-1.

Which documents need an IRN

Rule 48(4) applies to the invoice, and the notification extends the requirement to:

• tax invoices for B2B supplies, including supplies to registered persons, SEZ units and developers;
• export invoices;
• credit notes and debit notes under s.34.

It does not apply to:

• B2C invoices — though notified suppliers must carry a dynamic QR code on them under a separate requirement;
• bills of supply;
• delivery challans;
• receipt, payment and refund vouchers;
• ISD invoices;
• self-invoices under s.31(3)(f) for reverse charge from unregistered suppliers.

That last exclusion follows from the structure: Rule 48(4) applies to an invoice issued by the notified person as supplier, whereas a self-invoice is issued by the recipient.

Who is exempt even above the threshold

The proviso to Rule 48(4) permits the Commissioner, on the Council's recommendation, to exempt a person or class of registered persons from issuing an invoice under the sub-rule.

The exempted classes, as notified, include:

• an insurer, a banking company or a financial institution including an NBFC;
• a goods transport agency supplying services in relation to transportation of goods by road in a goods carriage;
• a supplier of passenger transportation service;
• a supplier of services by way of admission to exhibition of cinematograph films in multiplex screens;
• a Special Economic Zone unit — note, the unit, not the developer;
• a Government department and a local authority.

A person in an exempted class does not generate IRNs however large its turnover — and that is why Rule 46(s) requires such a supplier to carry the declaration on its invoices. The Rule 46(s) declaration →

Detecting the problem as a recipient

The risk sits with the buyer, because the buyer loses the credit.

• Check applicability. A supplier whose aggregate turnover in any preceding financial year from 2017-18 onwards crossed the notified limit is covered — and applicability does not lapse if turnover later falls.
• Look for the QR code with embedded IRN — Rule 46(r).
• Look for the declaration under Rule 46(s) where the supplier claims exemption.
• Validate the IRN on the e-invoice portal, which confirms the IRN exists and matches the invoice particulars.
• Reconcile GSTR-2B against the e-invoice data, which flows from the IRP.

A supplier that is covered, does not generate an IRN, and does not carry the declaration is the case to stop before payment.

Key takeaways

• Rule 48(5): a document issued by a covered person without an IRN is not an invoice.
• The recipient's credit fails at s.16(2)(a) — there is no document to possess.
• The supplier faces s.122(1)(i) penalty and the consignment faces s.129 detention.
• E-invoicing covers B2B invoices, export invoices, credit notes and debit notes.
• B2C invoices, bills of supply, delivery challans, vouchers, ISD invoices and self-invoices are outside it.
• Notified classes — banks, insurers, NBFCs, GTAs, passenger transport, multiplexes, SEZ units, government departments and local authorities — are exempt and must carry the Rule 46(s) declaration.

Read next

• Rule 46: Every Particular a Tax Invoice Must Carry
• The Rule 46(s) Declaration
• E-Invoice Under GST: Applicability and Generation
• Rule 36: Which Documents Support a Credit Claim

Disclaimer: Positions stated as on 5 September 2026, based on the CGST Rules as amended to 31 March 2026 (ICAI Bare Law, 12th edition) and the ICAI Handbook on Invoicing under GST (2025). Verify the current e-invoicing threshold and exempted classes before relying on them.