How do you issue a credit note against an export of services invoice?

Things change after an export invoice goes out. A US client disputes the hours on a consultant's timesheet, an agency agrees a discount because a campaign launched late, or a translator re-bills a project at a lower word count. When the value on an export invoice needs to come down, GST law expects a credit note in place of a new invoice or a quiet edit.¹

This guide covers when a service exporter can issue a credit note against an export invoice, what it must contain, the deadline, how it is reported, and how it ties into refunds and your bank's export records. The rules are stated as of October 2026.¹

What is a credit note on an export of services invoice?

A credit note on an export of services invoice is a document a registered supplier issues under section 34 of the Central GST (CGST) Act to reduce the value or tax on an invoice already issued.¹ Section 34(1) lets a registered supplier issue one or more credit notes for supplies made in a financial year where:¹

• Value too high: the taxable value or tax charged in the invoice is found to exceed the taxable value or tax payable for that supply.
• Deficient services: the services supplied are found to be deficient.
• Discount (from 1 November 2026): section 154 of the Finance Act, 2026 adds a third case, where a discount referred to in section 15(3)(b) of the CGST Act is given. Notification No. 03/2026-Central Tax brings section 154 into force from 1 November 2026.¹³

A credit note is issued by the supplier. If the value needs to go up instead, for example extra hours agreed after invoicing, section 34(3) requires a debit note.¹

Who can issue a credit note on an export invoice?

A GST-registered supplier can issue a credit note on an export invoice, whether the export was made under a Letter of Undertaking (LUT) or on payment of IGST.¹

The right treatment depends on why the value changed and which GST route you used.

How do you issue a credit note against an export of services invoice?

You issue a credit note against an export of services invoice by preparing it with the rule 53(1A) particulars, declaring it in GSTR-1 for the month of issue, and telling your AD bank about the lower value.¹²⁴⁷

1. Confirm the reason qualifies: the invoice value or tax was too high, the services were deficient, or, from 1 November 2026, a section 15(3)(b) discount was given.¹³
2. Prepare the credit note with the particulars in rule 53(1A), using a separate number series for credit notes.²
3. Declare it in GSTR-1 in Table 9B, Credit/Debit Notes (Unregistered), in the return for the month of issue.¹⁴
4. Issue an e-invoice if you are notified: the e-invoice system covers credit notes issued for exports.⁸
5. Tell your AD bank and ask it to record a reduction in export value under regulation 6.⁷
6. Keep the client's agreement to the reduction on file.

What must an export credit note contain?

An export credit note must contain the particulars in rule 53(1A) of the CGST Rules:²

• Supplier: your name, address and GSTIN.
• Document type: the nature of the document (credit note).
• Serial number: a consecutive serial number of up to sixteen characters, unique for the financial year.
• Date: the date of issue.
• Recipient: the recipient's name and address, and the address of delivery (for an unregistered recipient, such as a foreign client).
• Original invoice: the serial number and date of the original tax invoice or invoices.
• Values: the value of the taxable supply, the rate of tax and the amount of tax credited.
• Signature: your signature or digital signature.

For an export under an LUT, the tax amount is nil.¹² Keep a separate number series for credit notes, such as CN/26-27/001, so they do not clash with invoice numbers.

What is the deadline for a credit note on an export invoice?

The deadline for a credit note on an export invoice is the return for the month in which it is issued, and no later than 30 November following the end of the financial year in which the supply was made, or the date of furnishing the annual return, whichever is earlier.¹

The dates in the table apply section 34(2).¹

How do you report a credit note on an export invoice in GSTR-1?

You report a credit note on an export invoice in Table 9B, Credit/Debit Notes (Unregistered) of GSTR-1. The GST portal manual describes that table as covering credit, debit notes and refund vouchers issued to unregistered persons and for export invoices.⁴ The GST portal FAQs say a credit or debit note can be reported without linking it to a particular original invoice.⁹

If you must issue e-invoices, credit notes are also covered. The e-invoice system covers invoices, credit notes and debit notes issued by notified taxpayers to registered persons or for exports.⁸ See e-invoicing for export of services.

What happens if a credit note on an export invoice is late or missing?

A credit note declared after the section 34(2) deadline cannot reduce your liability for that supply under section 34.¹ A missing credit note also leaves the original value in your records, which matters for your LUT undertaking and your bank.

• Late note: after 30 November (or the annual return date), section 34 no longer reduces liability for that supply.¹
• LUT undertaking: rule 96A(1)(b) requires you to pay tax with interest if payment for the export is not received within the set period.¹⁰ A genuine reduction in the value of the supply, documented by a credit note, explains why the full original amount was not received.
• Bank records: if the bank is not told, the export can stay open in its records as under-realised.⁷

Keep the client's agreement to the reduction on file with the credit note.

How is a credit note on an export invoice calculated under the LUT and IGST routes?

A credit note on an export invoice is calculated as the reduction in taxable value, plus the IGST credited where IGST was paid; under an LUT the tax amount is nil.¹²

Say a content agency agrees to cut a $4,000 invoice to $3,500. Under an LUT it issues a credit note for $500 of taxable value with nil tax, and the export value for its refund and its bank becomes $3,500.¹⁷ If you have already claimed a refund of the IGST on the original invoice, ask your chartered accountant how to reflect a later credit note.

What does FEMA require when an export invoice is reduced by a credit note?

When an export invoice is reduced by a credit note, FEMA requires your authorised dealer (AD) bank to allow a reduction in export value, because the bank compares what it receives with the export value on record.⁷

• Realisation: under the FEMA (Export and Import of Goods and Services) Regulations, 2026, regulation 5 requires the full export value to be realised within nine months of the invoice date.⁷
• Reduction: regulation 6 lets your AD bank allow a reduction in export value, including non-realisation, if satisfied with your reasons.⁷
• Small invoices: for invoices up to ₹10 lakh, or the equivalent in foreign currency, the reduction may be allowed on your declaration.⁷

So a credit note and a FEMA reduction often go together: the agency in the example above asks its AD bank to record the reduction so the export entry can be closed at $3,500.¹⁷ See reduction in export invoice value and short realisation of export proceeds. If the client paid in full but an intermediary bank deducted charges in transit, the value of your supply has not changed, and section 34 does not obviously apply.¹ Treat that with your bank as a realisation matter.

What are the common mistakes with credit notes on export invoices?

The common mistakes with credit notes on export invoices are editing the original invoice, missing the 30 November cut-off, reporting in the wrong GSTR-1 table and not telling the bank.¹⁴⁷

• Editing or cancelling the original invoice: issue a credit note for the reduction instead.¹
• Missing the cut-off: the 30 November date applies to the previous year's invoices.¹
• Wrong table: report the note in Table 9B (Unregistered), and keep it out of the registered-recipient table.⁴
• Not telling the bank: a GST credit note alone leaves the export open in the bank's records as under-realised.⁷
• Forgetting the debit note: when the price goes up, section 34(3) requires a debit note.¹

Confirm unusual cases, especially after a refund has been claimed, with a chartered accountant (CA).