Taxation
Credit Note vs Debit Note in GST: Rules and Examples
Credit note vs debit note under GST section 34: when each is issued, who issues it, time limits, GSTR-1 reporting, ITC effect and worked examples.
In short
Under section 34 of the CGST Act, the supplier issues a credit note when the original invoice overstated the value or tax (a return, a price cut, a deficient supply) and a debit note when it understated them (an increase in price or quantity). Both are reported in GSTR-1, a credit note reduces the supplier's tax and the buyer's ITC, and a credit note must be declared by 30 November after the year ends or the annual return date, whichever is earlier.
- Both GST credit notes and debit notes are issued by the supplier, not the buyer.
- Credit note: value or tax goes down (returns, post-sale discount agreed in advance, overcharge).
- Debit note: value or tax goes up (price revised upwards, short-billed quantity).
- A credit note reducing tax must be declared by 30 November after the financial year, or the annual return date if earlier.
- A buyer's 'debit note' for returned goods is a commercial document; the GST credit note comes from the supplier.
The difference in one line
A credit note reduces what the buyer owes. A debit note increases it. Under GST, both are issued by the supplier to correct an invoice already issued.
| Credit note | Debit note | |
|---|---|---|
| Issued by | Supplier | Supplier |
| When | Invoice overstated value or tax | Invoice understated value or tax |
| Effect on supplier’s tax | Reduces output tax | Increases output tax |
| Effect on buyer’s ITC | Buyer reverses ITC | Buyer gets extra ITC |
| Typical reasons | Goods returned, rate overcharged, post-sale discount agreed in advance, deficient service | Price revised upwards, quantity short-billed, tax charged too low |
| Law | Section 34(1) CGST Act | Section 34(3) CGST Act |
| Reported in | GSTR-1 Table 9B (CDNR/CDNUR) | GSTR-1 Table 9B (CDNR/CDNUR) |
| Time limit | 30 November after the year end or annual return date, whichever is earlier | None for declaring the extra tax |
When to issue a credit note
Section 34(1) allows a credit note when, after a tax invoice has been issued:
- The taxable value or tax charged was more than it should have been. You billed 18% on an item that is 5%, or billed ₹520 per unit instead of ₹500.
- Goods are returned by the buyer.
- Goods or services are found deficient and the buyer pays less.
Worked example: sales return
Patel Hardware bought 100 door handles from you at ₹200 each plus 18% GST on invoice INV-221.
| Amount | |
|---|---|
| Invoice value | ₹20,000 + GST ₹3,600 = ₹23,600 |
| 10 handles returned (damaged) | ₹2,000 + GST ₹360 = ₹2,360 credit note |
| Net after credit note | ₹18,000 + GST ₹3,240 = ₹21,240 |
You issue credit note CN-14 referring to INV-221. In your GSTR-1 for that month it goes into CDNR; your output tax falls by ₹360. Patel Hardware sees the credit note in its GSTR-2B and must reduce its input tax credit by ₹360. Their account with you now shows ₹21,240 owed, not ₹23,600.
When to issue a debit note
Section 34(3) allows a debit note when the taxable value or tax in the invoice was less than it should have been.
Worked example: price revision
You billed 50 bags of cement at ₹380 each, but the agreed price was ₹400.
| Amount | |
|---|---|
| Short-billed value | 50 × ₹20 = ₹1,000 |
| GST at the item’s rate (say 18%) | ₹180 |
| Debit note | ₹1,180 |
The debit note adds ₹180 to your output tax in the month you issue it, and the buyer can take ₹180 more ITC once it reflects in their GSTR-2B.
What a GST credit or debit note must contain
Under Rule 53 of the CGST Rules, a credit or debit note carries:
- Supplier’s name, address and GSTIN
- Nature of the document (credit note or debit note)
- A consecutive serial number, up to 16 characters, unique in the financial year
- Date of issue
- Recipient’s name, address and GSTIN (or, for unregistered buyers, name, address and delivery address with state)
- Number and date of the original invoice or invoices
- Taxable value, tax rate and tax amount credited or debited
- Signature of the supplier or authorised person
Keep a separate series for credit notes (for example CN/26-27/001) so they do not interrupt your invoice sequence.
Post-sale discounts: GST credit note or financial credit note?
A common question from wholesalers: “I gave the retailer 2% extra at the end of the quarter. Can I reduce my GST?”
You can reduce GST through a credit note only if the discount was:
- agreed before or at the time of supply (for example in the dealer agreement),
- linked to specific invoices, and
- matched by the buyer reversing the corresponding input tax credit.
If those conditions are not met, give the discount through a financial or commercial credit note with no GST. Your buyer pays less, but the GST on the original invoices stays unchanged.
The time limit for credit notes
A credit note that reduces your tax liability must be declared in a return for a month no later than 30 November following the end of the financial year of the original supply, or the date you file the annual return for that year, whichever comes first.
Example: a return of goods sold in February 2026 (FY 2025-26) must have its credit note declared by 30 November 2026 at the latest. A credit note issued after that can still settle the account between you and the buyer, but it cannot reduce your GST.
Buyer’s debit note vs supplier’s credit note
In everyday trade, a buyer returning goods often sends a “debit note” to the supplier. Under GST that document is a commercial note: it records the buyer’s claim. The tax only moves when the supplier issues the GST credit note and reports it in GSTR-1. If your supplier has not done so, the return will not show in your GSTR-2B, and your ITC on the original invoice stays as it was.
How credit notes affect GSTR-1, GSTR-3B and your ledger
- GSTR-1: credit and debit notes to registered buyers go in CDNR; to unregistered buyers in CDNUR for large inter-state or export invoices, or in the B2CS totals otherwise. See GSTR-1 kaise bhare.
- GSTR-3B: your outward tax for the month is net of credit notes and plus debit notes. A credit note in GSTR-1 but missing from GSTR-3B is a classic mismatch; see GSTR-1 vs GSTR-3B.
- Party ledger: the credit note reduces the customer’s balance. Settle it against the invoice it relates to, so the customer’s ledger shows exactly which bill is still open.
- Stock: a sales return should put the goods back into stock; damaged goods are better kept in a separate damaged or returns godown.
Handling returns in VyapRise
In VyapRise you make a credit note from the original invoice: the invoice’s lines are filled in, you choose what came back, and the goods can go back into the godown you pick. The note posts to the customer’s ledger, the books and the GSTR-1 CDN tables, and prints in the same layout as your invoices. On the purchase side, a purchase return raises a debit note to the supplier. Credit and debit notes are on the Pro plan.
For the rules on the original invoice itself, read GST invoice format: mandatory fields.
This guide reflects the CGST Act and Rules as of October 2026. For discounts and schemes with large amounts, confirm the treatment with your CA.
How VyapRise handles this
Credit note from the invoice
In VyapRise a sale return or credit note starts from the original invoice, can put the goods back into a chosen godown, and posts to the books and the GSTR-1 CDN tables. Credit and debit notes are on the Pro plan.
Debit note from the purchase side
A purchase return takes stock out and raises a debit note to the supplier; brand claims for price protection, schemes or expiry can be kept as draft debit notes until the brand settles.
Frequently asked questions
Who issues a credit note under GST, the buyer or the seller?
The seller (supplier) issues it. When a buyer returns goods, the buyer may send a commercial debit note or a return note to ask for credit, but the GST credit note that reduces tax is the supplier's document.
Is there a time limit for issuing a credit note?
A credit note that reduces your tax must be declared in a return filed no later than 30 November following the end of the financial year in which the original supply was made, or the date you file the annual return for that year, whichever is earlier. After that, you cannot reduce your tax through it.
Is there a time limit for a debit note?
A debit note increases tax, so there is no deadline to declare it in the same sense. The tax it adds is payable in the period it is issued. The buyer's credit on a debit note is linked to the debit note's own date.
Can I give a discount after the sale and reduce GST?
Only if the discount was agreed before or at the time of supply, is linked to specific invoices, and the buyer reverses the matching input tax credit. Otherwise you can still give the discount through a financial (commercial) credit note, but GST on the original invoice stays as it is.
Where does a credit note go in GSTR-1?
Credit and debit notes to registered buyers go in the CDNR section of Table 9B. Notes to unregistered buyers go in CDNUR when they relate to large inter-state (B2CL) or export invoices; other B2C notes are adjusted in the B2CS totals.
Can one credit note cover several invoices?
Yes. A single credit or debit note can be issued against more than one invoice of the same financial year, provided the invoices are referenced.