India’s GST e-invoicing system is a mandatory reporting and authentication process for specified taxpayers and transactions. A supplier creates the invoice in its accounting, billing or ERP software, reports the required data to an authorised Invoice Registration Portal (IRP), and receives an Invoice Reference Number (IRN) plus a digitally signed QR code. Simply creating a PDF or emailing an invoice does not make it an e-invoice.
The general turnover threshold is ₹5 crore of aggregate annual turnover (AATO) in any preceding financial year from FY 2017–18 onward, effective 1 August 2023. Turnover alone does not settle every case: the taxpayer’s entity status, document type, transaction and any exemption must also be checked.
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What “e-invoice” means under GST
An e-invoice is a GST invoice that has been reported to an IRP and authenticated with an IRN. The supplier continues to prepare the commercial invoice in its own accounting, billing or ERP system. The IRP validates the submitted data, registers the document, digitally signs it and returns the registered information with a QR code.
This distinction matters because “electronic invoice” is a broad phrase. A spreadsheet, PDF, email attachment or invoice generated by billing software is not automatically a GST e-invoice. For a covered transaction, the invoice must go through the prescribed IRP process. The IRP FAQ describes the workflow this way: taxpayers continue creating GST invoices in their own accounting, billing or ERP systems, but report them to the Invoice Registration Portal; on reporting, the IRP generates an IRN, digitally signs the invoice and returns it with a QR code.
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The system is intended to standardise invoice data and connect the supplier’s invoicing workflow with GST reporting. After successful reporting, the invoice information is generally auto-populated into the supplier’s GSTR-1, according to IRP guidance. The supplier remains responsible for the accuracy of the underlying invoice and for meeting other GST requirements.
Who has to use e-invoicing
The turnover test
CBIC Notification 10/2023-Central Tax, dated 10 May 2023, changed the general threshold from ₹10 crore to ₹5 crore with effect from 1 August 2023. The notification states that, from that date, the words “ten crore rupees” are replaced by “five crore rupees.”
The test is retrospective. IRP mandate guidance says aggregate annual turnover in any preceding financial year beginning with FY 2017–18 is considered. A business therefore cannot look only at the current financial year. If its AATO crossed the applicable limit in one of those earlier years, it may fall within the mandate even if its latest turnover has declined.
AATO is assessed in the GST context and can involve the organisation’s turnover across registrations under the same PAN, subject to the applicable rules. The exact calculation and treatment of unusual structures should be confirmed with a GST professional or current CBIC instructions rather than inferred from a single GSTIN’s sales.
Entity and supplier conditions
The mandate generally concerns registered suppliers in the notified turnover class. IRP mandate material describes regular taxpayers and SEZ developers as eligible entity types for the process. The supplier, not the buyer or transporter, is responsible for generating and reporting the e-invoice when the transaction is covered.
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Crossing ₹5 crore is not a stand-alone answer. A taxpayer must also ask whether the entity is exempt and whether the particular document and supply are within the e-invoice scope. Portal access or an “enabled” status is an administrative capability; it is not, by itself, proof that the taxpayer is legally required to issue e-invoices.
Why the older ₹10 crore figure can cause errors
Some older FAQ pages and cached explanations still describe the earlier ₹10 crore limit. That figure should not be used as the current general threshold. The controlling change is CBIC Notification 10/2023-Central Tax, which applies the ₹5 crore threshold from 1 August 2023. A business reviewing old internal guidance should update both its turnover test and its invoice-generation controls.
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IRP FAQ guidance identifies the following as general examples. The precise treatment of a special transaction should be checked against the current GST rules and notifications.
| Document or transaction | General treatment in IRP guidance | Practical point |
|---|---|---|
| B2B tax invoice | Covered when the supplier and transaction meet the mandate | Report the invoice data to the IRP and obtain an IRN and QR code. |
| Export invoice | Covered for qualifying export supplies | Use the appropriate export fields and document type in the reporting system. |
| Deemed supply | Listed among covered transaction types | Confirm the applicable GST classification before submission. |
| Supply to an SEZ developer | Listed as covered | Do not confuse an SEZ developer with an SEZ unit, which appears in the exemption list. |
| Deemed export | Listed as covered | Check the transaction’s GST status and supporting documents. |
| Supply to government or a public-sector entity | Listed as covered in the FAQ examples | Government-related status does not automatically remove the reporting requirement. |
| Credit note or debit note | Covered when linked to a qualifying B2B or export transaction | Report the relevant note data rather than treating it as an ordinary commercial adjustment. |
| B2C supply | Listed outside the described e-invoice scope | Do not create an IRN solely because the invoice is electronic. |
| Bill of supply | Listed outside the described scope | Its GST document type is different from a tax invoice. |
| Job-work document | Listed outside the described scope | Apply the rules for the underlying job-work movement or service. |
| Import document | Listed outside the described scope | Imports follow customs and GST import documentation processes. |
| Exempt supply | Listed outside the described scope | Do not apply the tax-invoice workflow to an exempt document without checking the rule. |
| Financial or commercial credit note | Listed outside the described scope | Distinguish these from GST credit notes that relate to a covered supply. |
The table describes the examples in the IRP FAQ, not a substitute for classifying a particular invoice. Mixed supplies, special registrations and later rule changes can affect the result.
Who is exempt or outside the listed classes
The IRP FAQ lists several categories that are exempt from the described e-invoicing requirement. These exemptions are class-based and should be checked against the taxpayer’s current facts.
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| Category identified in the FAQ | Qualification |
|---|---|
| Banks, insurance companies and financial institutions, including NBFCs | The exemption is based on the entity category, not merely on whether a particular invoice is financial in nature. |
| Goods transport agencies | Confirm that the entity and service fall within the specified GTA category. |
| Passenger transport service suppliers | The exemption concerns suppliers of the relevant passenger transport service. |
| Specified admission services for film exhibitions in multiplex screens | This is a narrow service-specific exemption. |
| SEZ units | The FAQ distinguishes an SEZ unit from an SEZ developer; they should not be treated as interchangeable. |
| Input service distributors | An ISD’s distribution documents are treated differently from ordinary supplier tax invoices. |
| Specified OIDAR registrants | Only the registrants covered by the stated category qualify; verify the exact registration status. |
An entity that does not appear in an exemption list should not assume that its industry is exempt. Conversely, an exempt entity should retain evidence supporting the exemption and ensure that its software does not issue an IRN by default for every document.
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The IRP process does not replace the taxpayer’s invoice system. It adds a reporting and authentication step. Use this sequence for a covered document:
- Confirm applicability. Check the organisation’s AATO in every relevant preceding financial year from FY 2017–18 onward, then check entity exemptions and the transaction/document type.
- Create the invoice in your existing system. Enter the supplier and recipient GSTINs, invoice number and date, item details, taxable values, tax rates, place of supply, document type and other mandatory fields required by the GST schema. Your accounting, billing or ERP system remains the source of the commercial invoice.
- Connect to an authorised IRP. Use the IRP access method supported by your software or an approved integration. The supplier, rather than the buyer or transporter, submits the document.
- Submit the invoice data. Send the structured data to the IRP and wait for validation. The portal checks the submission against its registration and duplication controls.
- Receive the IRN and signed QR code. On successful registration, the IRP returns the unique IRN and a digitally signed QR code with the registered invoice information. Store these with the invoice record.
- Issue the registered invoice. Provide the customer the invoice containing the required IRN and QR code representation. Follow the applicable GST rules for the timing and manner of issuing the document.
- Reconcile the return data. Check that the invoice appears correctly in the GST reporting workflow. IRP guidance says successful data is generally auto-populated into the supplier’s GSTR-1, but the supplier must still review the return and correct errors through the permitted process.
What the QR code does
The QR code is digitally signed by the IRP and represents registered invoice data. It lets a recipient or authority verify key details without treating an unregistered PDF as proof of compliance. A QR image copied onto a different invoice, or a manually typed IRN that does not match the submitted data, does not provide the same assurance.
What happens if submission fails
Do not issue a covered invoice as though it were registered when the IRP has rejected the submission. Read the error returned by the portal, correct the source data, and resubmit through the permitted workflow. Common causes include an invalid GSTIN, duplicate invoice number, incorrect document type, inconsistent tax totals, unsupported characters or a mismatch between the invoice and the selected supply category. Keep the original error and corrected submission records for reconciliation.
A practical applicability decision framework
Use the following order instead of relying on a portal banner or a software setting:
- Measure the historical turnover. Review AATO for each preceding financial year beginning in FY 2017–18. Identify whether any year meets or exceeds ₹5 crore under the applicable GST calculation.
- Identify the GST registration and entity type. Determine whether the taxpayer is a regular registered supplier, an SEZ developer, an SEZ unit or another category named in the exemption guidance.
- Classify the document. Decide whether it is a tax invoice, credit note, debit note, bill of supply or another document, and whether the supply is B2B, export, B2C, exempt, import or job work.
- Check the counterparty and supply status. Government, public-sector, SEZ and export transactions can have specific reporting treatment. The counterparty’s status should be recorded accurately in the invoice data.
- Document the conclusion. Keep the turnover calculation, exemption basis and transaction classification with the business’s GST compliance records. Revisit the decision when the law, turnover or business model changes.
Examples
A registered manufacturer with AATO above ₹5 crore in a preceding year issues a B2B tax invoice to another GST-registered business. If no exemption applies, it should prepare the invoice in its ERP, report it to an IRP and obtain an IRN and QR code.
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A small retailer whose relevant historical AATO never reaches the threshold may not be required to use the mandate merely because its billing application can connect to an IRP. Conversely, an exempt financial institution should not be treated as covered solely because its turnover is high.
A supplier issuing a B2C invoice may use electronic billing for its own records, but the IRP FAQ lists B2C supplies outside the described e-invoice scope. The electronic format and the GST e-invoice obligation are separate questions.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Technology and record-keeping requirements
No special physical device is required. The described workflow is online and begins with an accounting, billing or ERP system that can produce the required structured invoice data. A business can use an IRP-supported integration or another authorised submission method, but software does not replace the legal checks.
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- Maintain a master list of GSTINs, legal names, addresses, place-of-supply settings and tax registrations.
- Use sequential document numbers and controls that prevent accidental reuse or duplicate submissions.
- Map product or service codes, units, taxable values, discounts and tax rates to the required invoice fields.
- Store the returned IRN, signed QR information, submission response and the final invoice together.
- Reconcile IRP responses with the sales ledger and GSTR-1 data.
- Restrict changes after registration and create an audit trail for cancellations, credit notes and corrections.
- Maintain a contingency procedure for portal downtime, integration errors and staff handovers.
Integration cost, vendor choice and implementation effort depend on the business’s existing systems and invoice volume. The compliance obligation comes from GST rules; purchasing or enabling an accounting product does not itself create compliance or an exemption.
Common mistakes to avoid
Treating a PDF as an e-invoice
A PDF can be the presentation copy of a registered invoice, but the file alone is not evidence that the document was reported to an IRP. Verify the IRN and signed QR data.
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Using current-year turnover only
The mandate looks at AATO in any preceding financial year from FY 2017–18 onward. A decline in the latest year does not automatically erase an earlier qualifying year.
Assuming enablement equals liability
Portal enablement allows a taxpayer to use the service. It does not answer whether the taxpayer, entity category and transaction are legally covered.
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Applying the rule to every document
B2C supplies, bills of supply, job work, imports, exempt supplies and financial or commercial credit notes are listed outside the described scope. Do not force these documents through the tax-invoice workflow without checking their classification.
Confusing SEZ units and SEZ developers
The FAQ treats these categories differently. Record the correct status before deciding whether an invoice is covered or exempt.
Relying on stale ₹10 crore guidance
Replace legacy instructions with the ₹5 crore threshold effective 1 August 2023, then review the turnover history and exemption list used by your compliance process.
Keeping the answer current
E-invoicing applicability is a rule-based determination, not a permanent software feature. CBIC notifications, GST portal instructions and IRP guidance can change thresholds, procedures or exemptions. Businesses should review the current notification and portal instructions when their turnover, GST registrations, entity status, supply mix or billing system changes.
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