Many businesses assume that because their primary trade involves agricultural produce, fresh food, or health services, they remain outside the scope of e-invoicing. This misunderstanding creates severe compliance penalties. When such a business issues a commercial invoice for scrap, packing material, or consulting services, the buyer expects a valid Invoice Reference Number (IRN) with a signed QR code.
The statutory definition of aggregate turnover under Section 2(6)
To determine whether Rule 48(4) applies to your business, you must examine the definition of aggregate turnover in Section 2(6) of the CGST Act. Aggregate turnover is computed on an all-India basis for all registrations tied to the same Permanent Account Number (PAN).
Under Section 2(6), aggregate turnover includes four distinct categories:
- Value of all taxable supplies
- Value of exempt supplies, including non-taxable and nil-rated sales
- Exports of goods or services or both
- Inter-state supplies made between distinct persons sharing the same PAN
Section 2(6) specifically excludes taxes paid under GST (CGST, SGST, IGST, UTGST, and cess). It also excludes the value of inward supplies on which tax is payable by the recipient on reverse charge basis.
Common mistake: Looking only at the taxable sales ledger in your state return when checking applicability. If a business operates two branches under one PAN, where one branch sells exempt grain for Rs 4.80 Crore and another sells taxable packaging for Rs 30 Lakh, the PAN turnover is Rs 5.10 Crore. Both branches fall under the mandatory e-invoicing regime.
The Rs 5 Crore threshold under Notification 10/2023-Central Tax
The Central Board of Indirect Taxes and Customs (CBIC) notified Phase VI of e-invoicing through Notification No. 10/2023-Central Tax. This notification substituted the previous Rs 10 Crore limit with Rs 5 Crore with effect from 1 August 2023.
The legal trigger under Rule 48(4) of the CGST Rules states that if a registered person's aggregate turnover in any preceding financial year from 2017-18 onwards exceeds Rs 5 Crore, e-invoicing becomes mandatory. Once a business crosses this benchmark in any single financial year, the obligation to issue e-invoices continues in all subsequent financial years, even if turnover in later years drops below Rs 5 Crore.
Notice risk under Rule 48(5): Under Rule 48(5) of the CGST Rules, any invoice issued without an IRN by a notified taxpayer is not treated as a legal tax invoice. Your buyer will face input tax credit rejection during audit, triggering demand notices and vendor disputes.
Do businesses dealing in exempt goods generate an IRN?
Crossing the turnover threshold does not mean you must generate an IRN for every transaction. According to guidance issued by the NIC e-Invoice Portal FAQs, e-invoicing applies only to documents specified under Rule 48(4):
- Tax invoices issued for B2B supplies to registered buyers
- Tax invoices issued for supplies to Special Economic Zone (SEZ) units or developers
- Export invoices (with or without payment of tax)
- Credit notes and debit notes issued in relation to taxable supplies
For wholly exempt supplies, a registered person issues a bill of supply under Section 31(3)(c) of the CGST Act. The Invoice Registration Portal (IRP) does not accept bills of supply. Therefore, transactions involving purely exempt goods or services never require an IRN.
However, if an entity crossing the Rs 5 Crore threshold executes even one taxable B2B sale, that specific transaction requires a tax invoice with an IRN and signed QR code. Examples include sale of capital assets, scrap material disposal, and taxable management charges to related parties.
Reverse charge supplies: unregistered vendors vs registered suppliers
Accountants frequently get confused about how reverse charge mechanism (RCM) transactions interact with e-invoicing. There are two distinct RCM scenarios under the law:
| Transaction type | Issuing party | Document issued | IRN required? |
|---|---|---|---|
| Inward supply from unregistered person (Section 9(4) or 9(3)) | Recipient (Buyer) | Self-invoice under Section 31(3)(f) | No (Outside IRP) |
| Inward supply from registered person under RCM (e.g. GTA, legal services) | Supplier (Vendor) | Tax invoice with RCM flag set to Y | Yes (If vendor turnover > Rs 5 Cr) |
| Outward supply of exempt goods to registered buyer | Supplier (Seller) | Bill of supply under Section 31(3)(c) | No (Not a tax invoice) |
| Outward supply of taxable scrap or goods by exempt trader | Supplier (Seller) | Tax invoice under Section 31(1) | Yes (Must obtain IRN) |
As clarified in the official guidelines on the NIC e-Invoice Portal, e-invoicing does not apply to invoices issued by the recipient on receipt of inward supplies from unregistered persons. The recipient creates a payment voucher and self-invoice under Section 31(3)(f) in their own accounting system and reports the tax liability directly in Table 3.1(d) of Form GSTR-3B.
Conversely, when a registered Goods Transport Agency (GTA) or lawyer with aggregate turnover exceeding Rs 5 Crore issues an invoice to your company for services taxed under reverse charge, the vendor must generate an IRN. The invoice indicates that tax is payable by the recipient under RCM. When properly registered, this document auto-populates into your GSTR-2B under the reverse charge table.
Worked scenario: multi-branch aggregate turnover calculation
Consider M/s Apex Agro Industries, a business operating two units under the same PAN (07AAAAA0000A1Z5) during financial year 2025-26:
- Branch 1 (Haryana): Processes and sells organic pulses and food grains (wholly exempt goods under Notification No. 2/2017-Central Tax (Rate)).
- Branch 2 (Delhi): Manufactures food packaging materials and handles commercial cold storage services (both taxable at 18%).
| Branch & supply type | Annual turnover | Counted in Section 2(6)? | Reason |
|---|---|---|---|
| Haryana: Exempt food grains | Rs 4,60,00,000 | Rs 4,60,00,000 | Mandatory inclusion of exempt sales |
| Haryana: Sale of used machinery scrap | Rs 8,00,000 | Rs 8,00,000 | Taxable outward supply |
| Delhi: Taxable packaging materials | Rs 55,00,000 | Rs 55,00,000 | Taxable outward supply |
| Delhi: Export of packing trays | Rs 15,00,000 | Rs 15,00,000 | Zero-rated supply included in turnover |
| Haryana: Inward transport under RCM | Rs 12,00,000 | Rs 0 | Excluded under Section 2(6) |
| Total PAN Aggregate Turnover | Rs 5,50,00,000 | Rs 5,38,00,000 | Exceeds Rs 5,00,00,000 threshold |
The aggregate turnover across both branches reaches Rs 5,38,00,000 (Rs 5.38 Crore). Because this figure exceeds the Rs 5 Crore limit set by Notification 10/2023-Central Tax, e-invoicing becomes mandatory for both units starting from the subsequent tax period.
The compliance consequences for Apex Agro Industries are clear:
- For the Rs 4,60,00,000 in food grain sales, the Haryana branch continues issuing regular bills of supply without an IRN.
- For the Rs 8,00,000 scrap sale, the Haryana branch must register on the IRP and generate a tax invoice with an IRN and QR code.
- For all B2B packaging sales (Rs 55,00,000) and exports (Rs 15,00,000), the Delhi branch must generate e-invoices with valid IRNs.
- For the Rs 12,00,000 inward GTA transport, Apex Agro issues internal self-invoices without visiting the e-invoice portal.
Common pitfalls when applying the Rs 5 Crore rule
Accountants frequently commit specific errors when tracking e-invoice thresholds:
- Ignoring prior financial years: Assessing turnover only for the current year. If turnover was Rs 5.2 Crore in 2022-23 and dropped to Rs 3 Crore in 2024-25, e-invoicing remains mandatory today.
- Excluding branch transfers: Inter-state stock transfers between branches carrying the same PAN are supplies under Schedule I and form part of aggregate turnover.
- Failure to cancel duplicate IRNs promptly: If an invoice is uploaded twice by error, refer to our guide on e-invoice IRN error 2150 duplicate IRN to resolve portal rejections, and remember that cancellation must occur within the statutory window explained in our guide on e-invoice cancellation 24 hours deadline.
- Failing to reconcile recipient ITC: When suppliers fail to issue e-invoices, credit does not flow into GSTR-2B correctly, producing discrepancies detailed in our breakdown of common GSTR-2B reconciliation errors and fixes.
Related guides
- E-invoice error 2265: HSN code digit length mismatch and turnover rules
- E-invoice signature verification and digital signature error fix
- B2C dynamic QR code compliance: threshold rules, exemption scope, and UPI payment reconciliation under GST
- RCM on Goods Transport Agency GTA declaration
- E-invoice for B2B credit note: IRN generation deadline and rules
Frequently asked questions
Are exempt supplies counted when determining the Rs 5 Crore e-invoicing threshold?
Yes. Under Section 2(6) of the CGST Act, aggregate turnover includes all taxable supplies, exempt supplies, nil-rated supplies, and exports across all registrations sharing the same PAN. If the combined total exceeds Rs 5 Crore in any preceding financial year from 2017-18 onwards, the threshold is crossed.
Do businesses need to generate an IRN for exempt supplies?
No. E-invoicing under Rule 48(4) applies to tax invoices, credit notes, and debit notes for taxable supplies. For wholly exempt supplies, suppliers issue a bill of supply under Section 31(3)(c), which cannot be registered on the Invoice Registration Portal.
Does e-invoicing apply to reverse charge purchases from unregistered suppliers?
No. When a recipient receives supplies from an unregistered vendor and pays tax under reverse charge, the recipient issues a self-invoice under Section 31(3)(f). Recipient self-invoices do not go through the Invoice Registration Portal.
What happens if a supplier who crossed Rs 5 Crore issues an invoice without an IRN?
Under Rule 48(5) of the CGST Rules, any invoice issued without an IRN by a person covered under Rule 48(4) is treated as completely invalid. The buyer cannot use it to support an input tax credit claim.
Check your vendor compliance in GSTR-2B
Verify whether supplier invoices in your purchase register carry valid IRN data in your monthly GSTR-2B. Your GSTR-2B and purchase register files are read in your browser and never uploaded to any server.
Last checked: 15 October 2026. Sources: CBIC CGST Act Section 2(6), CBIC CGST Rules Rule 48, CBIC Notification No. 10/2023-Central Tax, NIC e-Invoice Portal FAQs.