A GST credit note is the document you issue when the value or tax on an invoice you already raised turns out to be too high, for example because the customer got a discount, rejected part of the work, or you simply overbilled. It must refer to the original invoice, show the reduced taxable value and tax, carry its own number and date, and be reported in your GST returns. For export invoices, the same discipline applies, and the credit note also explains to your bank why less money arrived.
Key takeaways
- Issue a credit note when the taxable value or tax charged on an invoice was more than it should be.
- The credit note references the original invoice and has its own serial number and date.
- It flows into your GST returns. There are time limits for issuing and reporting credit notes; ask your CA for the current position.
- For exports under LUT there is no IGST to reverse, but the credit note is still needed to correct the value.
- If the original export invoice is on an EDF, send the credit note to your AD bank too.
When a credit note is the right document
| Situation | Credit note? | Notes |
|---|---|---|
| You invoiced ₹1,20,000 but the agreed fee was ₹1,00,000 | Yes | Correct the excess value |
| Client rejected part of the deliverable and you agreed a reduction | Yes | Reference the reduced scope |
| You charged IGST when CGST + SGST applied (or vice versa) | Usually handled by a correcting process | Ask your CA; it is not just a credit note question |
| A discount agreed after invoicing | Often yes | Conditions apply to tax reduction; check with your CA |
| Value goes up after invoicing | No | That needs a debit note |
| Invoice raised for the wrong customer | Depends | Often a credit note against the wrong invoice and a fresh invoice to the right one |
The opposite document, for increases in value, is a debit note. Our glossary entry on the credit note explains the terminology.
Fields a GST credit note should carry
| Field | What to enter |
|---|---|
| Document title | "Credit Note" |
| Your name, address and GSTIN | As on your invoices |
| Credit note number | From a separate series, for example CN/26-27/001 |
| Credit note date | Date of issue |
| Recipient name and address | As on the original invoice |
| Recipient GSTIN | For registered domestic recipients |
| Original invoice number and date | The invoice being reduced |
| Description and SAC/HSN | Same as the original line |
| Original taxable value | From the invoice |
| Revised taxable value | After the reduction |
| Difference | The credit amount |
| Tax rate and tax amount reversed | CGST/SGST or IGST, or nil under LUT |
| Reason | Short, factual |
| Place of supply | As on the original |
| Signature | Authorised signatory |
Keep credit note numbers in their own continuous series, separate from invoice numbers. That makes your GST records easier to reconcile.
Sample layout: domestic credit note
Juniper Works Pvt Ltd, a Pune agency, invoiced a Mumbai client ₹2,36,000: a taxable value of ₹2,00,000 plus CGST and SGST, since both parties are in Maharashtra (an illustrative 9% each). The client rejected one of five campaign videos, and Juniper agreed a ₹40,000 reduction.
| Original invoice JW/26-27/214 | Credit note CN/26-27/012 | |
|---|---|---|
| Taxable value | ₹2,00,000 | ₹40,000 |
| CGST @ 9% | ₹18,000 | ₹3,600 |
| SGST @ 9% | ₹18,000 | ₹3,600 |
| Total | ₹2,36,000 | ₹47,200 |
| Reason | – | One of five videos rejected; fee reduced by agreement dated 3 Oct 2026 |
The client's revised payable is ₹1,88,800. Our free credit note generator builds this layout, and the GST invoice generator uses a matching style for the originals.
Export credit notes
An export credit note follows the same format with a few differences:
- Currency. Show amounts in the invoice currency, for example USD, matching the original export invoice.
- No GSTIN for the recipient. Your foreign client is not registered in India.
- Tax line. Under LUT, the tax reversed is nil. Keep the LUT reference visible so the document is self-explanatory.
- Place of supply. Outside India, as on the original.
A worked example
Tidewater Analytics LLP in Kochi invoiced a Singapore client USD 9,000 on 18 November 2026 under LUT for a data-cleaning project. The client found that 15% of records were not processed to specification. Tidewater redid some of the work and agreed to reduce the fee by USD 900.
Tidewater issued credit note TA/CN/26-27/004 on 12 December 2026:
- Original invoice: TA/26-27/087, 18 November 2026, USD 9,000.
- Revised value: USD 8,100.
- Credit: USD 900; IGST nil (export under LUT).
- Reason: partial non-conformance with data specification, reduction agreed by email on 10 December 2026.
The November invoice was already on Tidewater's November EDF. So Tidewater also wrote to its AD bank, quoting the EDF month and invoice number, attaching the credit note and the client's email, and asking how the bank wanted the reduced value recorded in EDPMS. Our article on credit notes and the EDF covers that side in detail.
How credit notes flow into your returns
Credit notes are reported in your GST returns for the period in which they are issued, and they reduce your outward supply figures. For domestic B2B supplies, the recipient's input tax credit is affected too, which is why clients care that you issue them correctly.
The time limit for issuing a credit note that reduces tax, and the conditions for discount-related reductions, are set in GST law and have been clarified over time. Rather than rely on a summary, confirm the current rules with your CA when you issue a credit note late in the year or long after the original invoice. This is general information, not legal or tax advice.
Common mistakes
- Editing the original invoice instead. Once issued and reported, an invoice should be corrected through a credit or debit note, not rewritten.
- No reference to the original invoice. A credit note that floats free of any invoice is hard to defend.
- Using the invoice number series. Keep a separate series.
- Forgetting the bank for exports. If the invoice is on an EDF, the bank's records need the same correction.
- Vague reasons. "Adjustment" tells nobody anything. "Two of eight modules delivered without captions; fee reduced by agreement" does.
Frequently asked questions
What is a credit note under GST?
It is a document a supplier issues to reduce the taxable value or tax on an invoice already raised, for example after a discount, rejection or overbilling. It references the original invoice, has its own number and date, and is reported in GST returns.
What details must a GST credit note contain?
Your name, address and GSTIN; the credit note number and date; the recipient's details; the original invoice number and date; the description; original and revised values; the tax reversed; and a signature. Adding a short reason makes it much easier to defend later.
Is there a time limit for issuing a credit note?
Yes, GST law sets a time limit for credit notes that reduce tax liability. Confirm the current deadline with your CA, especially for invoices from an earlier financial year.
Do I need a credit note for an export invoice under LUT?
Yes, if the value of the export reduces. There is no IGST to reverse, but the credit note corrects the value in your GST records and supports what you tell your AD bank about the reduced realisation.
Can I just cancel the invoice instead?
Invoice cancellation is a different process with its own limits, particularly if you use e-invoicing. If the invoice has been issued and reported, a credit note is usually the correct way to reduce it. Ask your CA if unsure.
Bottom line
A credit note is a small document that keeps your GST returns, your client's records and, for exports, your bank's EDPMS entry telling the same story. Create one in a minute with our free credit note generator.
This guide is general information for Indian businesses, not legal or tax advice. Rules and bank processes change — confirm specifics with your AD bank or chartered accountant.