GST E-Invoicing Rules in 2026: ₹5 Crore Turnover Limit, IRN Requirement and Penalty Risks

GST e-invoicing is not merely a special invoice format. Where the mandate applies, specified invoice data must be reported to an Invoice Registration Portal (IRP), which validates the data and returns an Invoice Reference Number (IRN), acknowledgement details and a digitally signed QR code.

A normal invoice generated only in accounting software is not sufficient for a covered transaction if it has not been registered in the prescribed manner.

Businesses reviewing compliance for FY 2026-27 should understand the ₹5 crore threshold, PAN-level turnover test, covered documents, exempt categories, reporting timelines, goods-movement risks and the effect on the recipient’s Input Tax Credit (ITC).

Important Clarification: ₹5 Crore Is Not a New Rule from 1 April 2026

The e-invoicing threshold was reduced to turnover exceeding ₹5 crore with effect from 1 August 2023 through Notification No. 10/2023—Central Tax.

There is no separate new ₹5 crore threshold commencing on 1 April 2026. The relevance of 1 April 2026 is practical: if a business first exceeded the threshold during FY 2025-26, it should examine whether e-invoicing becomes applicable for covered supplies from the beginning of FY 2026-27.

Official reference: CBIC Central Tax Notification listing.

Who Is Covered by the ₹5 Crore Threshold?

Subject to the notified exemptions, e-invoicing applies where the registered person’s aggregate turnover exceeded ₹5 crore in any financial year from 2017-18 onward.

The test is not limited to:

• The current financial year;
• Only FY 2025-26;
• One branch;
• One State; or
• One GSTIN.

If the threshold was crossed in any relevant preceding financial year, later turnover falling below ₹5 crore does not automatically remove the mandate.

Situation	Compliance position to examine
Turnover never exceeded ₹5 crore in any FY from 2017-18 onward	Threshold-based e-invoicing mandate ordinarily does not apply
Turnover exceeded ₹5 crore in an earlier year	Mandate continues for covered supplies, subject to exemptions
Threshold first crossed during FY 2025-26	Prepare for applicability from 1 April 2026
Turnover is exactly ₹5 crore	Notification uses “exceeding ₹5 crore”; verify the precise aggregate-turnover figure

Turnover Must Be Calculated at PAN Level

Aggregate turnover is tested across registrations under the same PAN on an all-India basis. A business cannot test each GSTIN separately.

For example, suppose a company has:

• Maharashtra GSTIN turnover: ₹3.20 crore;
• Gujarat GSTIN turnover: ₹1.40 crore; and
• Delhi GSTIN turnover: ₹1.10 crore.

The PAN-level aggregate is ₹5.70 crore. Checking each GSTIN separately would incorrectly suggest that none crossed the threshold.

Aggregate turnover broadly includes taxable supplies, exempt supplies, exports and inter-State supplies of persons having the same PAN, subject to the statutory definition and exclusions.

Which Transactions and Documents Require E-Invoicing?

For a covered registered person, e-invoicing generally applies to prescribed documents relating to:

• B2B taxable supplies to registered persons;
• Supplies to SEZ units or developers, where applicable;
• Exports with payment of IGST;
• Exports under bond or Letter of Undertaking without payment of IGST;
• Debit notes for covered supplies; and
• Credit notes for covered supplies.

Ordinary B2C invoices are not e-invoices merely because the supplier crossed ₹5 crore. Large suppliers may have separate B2C dynamic QR-code requirements, which should not be confused with IRN-based e-invoicing.

Wholly exempt supplies generally require a bill of supply rather than a tax invoice, so they should not be treated as e-invoice transactions merely because the supplier is otherwise covered.

What Makes an E-Invoice Valid?

The supplier first prepares invoice data in its ERP, accounting or billing system. The prescribed data is then uploaded or transmitted to an authorised IRP.

After successful validation, the IRP returns:

• IRN;
• Acknowledgement number and date; and
• Digitally signed QR code.

Rule 48(5) provides that an invoice issued by a registered person covered by Rule 48(4), otherwise than in the prescribed manner, is not treated as an invoice.

Therefore, merely typing an “IRN pending” remark or planning to generate it later does not make the ordinary software invoice a valid e-invoice.

Do Not Confuse Invoice Date, IRN Reporting Limit and Supply Timing

Three different rules can operate together:

1. The statutory time for issuing an invoice under Section 31;
2. The Rule 48 e-invoice authentication requirement; and
3. Any technical reporting restriction enforced by the IRP.

The portal’s 30-day rule does not give every business permission to wait 30 days after the supply.

Goods Involving Movement

For goods involving movement, the tax invoice must generally be issued before or at the time of removal. Where e-invoicing applies, the business should complete IRN generation before dispatch so that goods move with a valid invoice and other required documents.

Supply of Services

For services, the invoice can generally be issued within the prescribed period after supply—ordinarily 30 days, with a different period for specified suppliers. Once the invoice is issued by a covered taxpayer, its e-invoice reporting must also comply with the applicable IRP restriction.

Read the detailed timing guide: GST E-Invoicing Time Limit: Goods vs Services Explained.

30-Day IRN Reporting Restriction for ₹10 Crore+ AATO

Effective from 1 April 2025, taxpayers having Annual Aggregate Turnover of ₹10 crore or more must report covered invoices, debit notes and credit notes to the IRP within 30 days from the document date.

If a document is reported after the permitted window, the system restricts IRN generation.

This ₹10 crore technical reporting restriction is separate from the ₹5 crore e-invoicing applicability threshold:

Rule	Threshold	Effect
E-invoicing applicability	Aggregate turnover exceeding ₹5 crore in any relevant preceding FY	Covered documents must be registered on IRP
30-day reporting restriction	AATO ₹10 crore or more	IRP blocks reporting beyond 30 days from document date

Official reference: IRP advisory on the 30-day reporting restriction.

Can an IRN Be Generated After Goods Have Already Moved?

Businesses should not plan their goods-dispatch process on that basis.

If a covered supplier issues only an ordinary invoice and dispatches goods before obtaining the IRN, the goods may already have moved without the valid invoice required under the e-invoicing framework. Generating an IRN later does not erase the historical document failure or automatically protect the earlier movement.

Further, the IRP does not permit backdating outside the portal controls, and ₹10 crore+ taxpayers face the 30-day reporting restriction.

The compliant control is straightforward: integrate billing, IRP validation, e-way bill generation and dispatch so that the truck is released only after required documents have passed validation.

E-Invoice Does Not Replace the E-Way Bill

E-invoicing and e-way bill compliance are connected but separate.

• The e-invoice authenticates the prescribed invoice data and generates an IRN and QR code.
• The e-way bill governs movement of goods where the e-way bill provisions apply.

Generating an IRN does not remove the need to generate a valid e-way bill where required. Similarly, having an e-way bill does not cure the absence of a mandatory IRN.

Vehicle Interception and Section 129 Risk

Section 129 deals with detention, seizure and release of goods and conveyances transported in contravention of GST provisions.

If goods are intercepted and the mandatory e-invoice was not generated, the officer may question whether the goods are accompanied by the valid invoice required by law. The risk is greater where the invoice, e-way bill, goods, quantity, value or recipient details do not match.

However, every IRN omission does not automatically produce the same Section 129 result. The legal consequences depend on the facts, applicable documents, nature of the defect, tax payment and the proceedings initiated. Businesses should avoid describing one penalty formula as automatic for every case.

Supplier Penalty Exposure

Non-compliance can attract proceedings under the invoice, penalty and demand provisions of the CGST Act. Depending on the facts, authorities may examine:

• Rule 48(5), under which the non-compliant document is not treated as an invoice;
• Section 122 provisions relating to supply without a proper invoice or issue of an incorrect or false invoice;
• Section 125 general penalty;
• Tax, interest and demand provisions where liability or reporting is affected; and
• Section 129 where goods are transported in contravention of the law.

The exact penalty cannot be determined only from the missing IRN. It depends on whether tax was paid, the document and return trail, intent, movement of goods, revenue impact and the section invoked in the notice.

How Missing IRN Can Affect the Buyer’s ITC

Section 16 requires the recipient to possess a tax invoice, debit note or other prescribed tax-paying document and satisfy the other ITC conditions.

If the supplier was required to generate an e-invoice but failed to do so, Rule 48(5) creates a serious document-validity issue. The recipient’s ITC may be disputed because the document may not be treated as a valid invoice.

The recipient should verify:

• Supplier’s e-invoicing applicability;
• IRN and QR code;
• Supplier and recipient GSTIN;
• Taxable value and tax amount;
• GSTR-1/IFF reporting;
• Reflection in GSTR-2B; and
• Receipt of goods or services and all other Section 16 conditions.

ITC is not automatically and permanently lost in every case if the supplier corrects the document within the legally permitted framework and all conditions and timelines are satisfied. But the buyer should not knowingly accept an “IRN pending” invoice and claim credit without resolving the defect.

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Entities Specifically Exempt from E-Invoicing

Turnover alone does not decide the result. Notified categories include, subject to the precise statutory conditions:

• Insurer, banking company or financial institution, including an NBFC;
• Goods Transport Agency;
• Supplier of passenger transportation services;
• Supplier of admission services to the exhibition of cinematograph films in multiplex screens;
• Special Economic Zone unit;
• Government department; and
• Local authority.

Do not extend an exemption beyond its wording. For example, an exemption for an SEZ unit should not automatically be assumed to cover every SEZ developer. Portal enablement or an exemption declaration also does not replace the taxpayer’s responsibility to determine the legal position.

Exports and E-Invoicing

Exports are covered documents for a notified supplier even though the overseas customer is not registered under Indian GST.

The export invoice should correctly capture:

• Export with payment of IGST or under LUT/bond without payment;
• Recipient and destination-country details;
• Place of supply and currency data required by the schema;
• IRN and signed QR code; and
• Shipping, GSTR-1 and refund-related consistency.

Businesses should therefore not configure e-invoicing only for domestic B2B sales.

FY 2026-27 Readiness Checklist

1. Calculate aggregate turnover at PAN level for every FY from 2017-18 onward.
2. Identify whether the threshold was crossed in any year.
3. Document any notified entity exemption.
4. Map B2B, SEZ, export, debit-note and credit-note transactions.
5. Keep B2C and bill-of-supply transactions outside the IRN workflow where appropriate.
6. Register and test the GSTIN on an authorised IRP.
7. Integrate ERP or accounting software with IRP reporting.
8. Prevent dispatch until IRN, QR code and e-way bill checks pass.
9. Apply the 30-day portal control for ₹10 crore+ AATO.
10. Reconcile e-invoices with GSTR-1, GSTR-2B and e-way bill data.
11. Train billing, sales, dispatch, accounts and customer-support teams.
12. Create an exception process for IRP downtime, cancellation, amendments and rejected data.

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FAQs

Is the ₹5 crore e-invoicing threshold new from 1 April 2026?

No. The ₹5 crore threshold became effective from 1 August 2023. A business that first crossed it during FY 2025-26 should, however, prepare for FY 2026-27 applicability.

Which years must be checked?

Check whether PAN-level aggregate turnover exceeded ₹5 crore in any financial year from 2017-18 onward.

Is turnover checked GSTIN-wise?

No. The aggregate-turnover test operates at PAN level across GST registrations on an all-India basis.

Is e-invoicing required when turnover is exactly ₹5 crore?

The notification uses turnover “exceeding ₹5 crore.” Confirm the precise aggregate-turnover computation rather than rounding the figure.

Can I issue a normal invoice and generate the IRN later?

A covered invoice issued outside the prescribed Rule 48 process is not treated as an invoice. For goods, IRN generation should be completed before dispatch. Later reporting does not automatically cure the earlier non-compliance.

Does every ₹5 crore+ taxpayer have a 30-day IRN limit?

No. E-invoicing applicability begins above ₹5 crore, while the portal’s 30-day reporting restriction applies to taxpayers with AATO of ₹10 crore or more.

Can the buyer’s ITC be questioned?

Yes. Missing mandatory IRN can create a valid-document issue under Rule 48(5) and Section 16. The buyer should also verify GSTR-2B and all other ITC conditions.

Are B2C invoices covered?

Ordinary B2C invoices are not IRN-based e-invoices. Separate dynamic QR-code rules may apply to specified large taxpayers.

Are exports covered?

Yes. Covered suppliers must report prescribed export invoices to the IRP.

Does an IRN replace the e-way bill?

No. Both requirements must be satisfied independently where they apply.

Disclaimer: This article provides general GST information based on the framework and portal advisories available in 2026. Applicability and consequences depend on turnover history, entity category, supply type, documents and current notifications. Obtain professional advice for specific cases.