What is the time limit for issuing a credit note under GST?

A credit note must be declared in the GSTR-1 for the month it is issued, and not later than 30 November following the end of the financial year in which the supply was made, or the date you file the annual return for that year, whichever is earlier. After that, you can still give the commercial credit but cannot reduce GST on it.

Is there a time limit for debit notes?

No outer time limit applies to issuing a debit note — it must be reported in the return for the month in which it is issued, and tax is payable with that month's GSTR-3B. For the buyer, input tax credit on a debit note must be claimed by 30 November following the end of the financial year in which the debit note was issued, or the annual return date if earlier.

Does the buyer have to reverse ITC when a credit note is issued?

Yes, if the buyer is registered and had claimed the credit. Since 1 October 2025, section 34(2) says the supplier cannot reduce its output tax on a credit note unless the input tax credit attributable to it has been reversed by the registered recipient. In practice, the buyer accepts the credit note on the IMS dashboard and the reduction flows into GSTR-2B and GSTR-3B.

What is a financial or commercial credit note?

A financial (commercial) credit note gives a buyer a discount or adjustment without changing the GST charged on the original invoice — for instance, a post-sale discount not agreed before the sale. The supplier pays GST on the full original value and the buyer keeps the full ITC. CBIC's Circular 251/08/2025-GST confirms the recipient need not reverse ITC for such notes.

GST & indirect tax

What Is a Credit Note and a Debit Note? GST Rules, Time Limit and Examples (2026)

Q: What is a debit note?

Under GST, a debit note is issued by the supplier when the taxable value or tax in an invoice turns out to be lower than it should be — for example, a price increase agreed after the sale or an undercharged rate. It increases the amount payable by the buyer and the supplier's tax liability. In everyday trade, buyers also raise 'debit notes' on suppliers for purchase returns, but that is an internal document, not a GST debit note.

Credit note and debit note under GST in 2026: section 34 rules, the 30 November time limit, Rule 53 contents, GSTR-1 reporting, ITC reversal and worked ₹ examples.

Edited by Sumeet YadavFounder & editor, MSMETOOLS · fact-checked against official sources

Updated October 2026 Verified against official sources 8 October 2026 18 min read

Credit note and debit note under GST — MSMETOOLS guide cover

Contents (11)

1. What is a credit note?
2. What is a debit note?
3. When can you issue a GST credit note? Common situations
4. Time limit: the 30 November cut-off for credit notes
5. What a credit or debit note must contain (Rule 53)
6. Reporting credit and debit notes in GSTR-1
7. The buyer's side: ITC reversal and IMS
8. GST credit note vs financial (commercial) credit note
9. Worked examples in ₹
10. Common mistakes and how to fix them
11. What to do next

Sales don't always end with the invoice. Goods come back damaged, a customer negotiates a discount after delivery, a rate is charged wrongly, or the price goes up after the bill is raised. Under GST, each of these is fixed with a credit note or a debit note, and getting the document, the timing and the return entry right decides whether you overpay tax or your customer loses credit. This guide is for GST-registered suppliers, buyers and their accountants. It covers what credit and debit notes are, when section 34 of the CGST Act allows them, the time limit, the contents required by Rule 53, how they are reported in GSTR-1, the buyer's ITC reversal, the difference between GST and financial credit notes, and worked ₹ examples — checked against the CGST Act, Finance Act changes and GSTN advisories in October 2026.

Quick answer

A credit note is issued by a supplier to reduce the value or tax of an earlier invoice — for returns, excess charges, deficient supplies or eligible discounts. A debit note is issued by the supplier to increase it when the invoice was undercharged. Both are governed by section 34 of the CGST Act, must carry the Rule 53 particulars and are reported in GSTR-1.

Credit notes must be declared by 30 November after the end of the FY of supply, or the annual return date if earlier
Since 1 October 2025, the supplier's tax comes down only if the registered buyer reverses the matching ITC
Debit notes have no outer time limit; tax is paid in the month they are issued
Financial (commercial) credit notes don't change GST on either side
E-invoice taxpayers must generate an IRN for B2B credit and debit notes too

What is a credit note?

A credit note is a document that reduces what a buyer owes on an invoice already issued. In accounting it records a reduction in sales and in the customer's receivable. Under GST it has a narrower legal meaning: section 34(1) of the CGST Act allows a registered supplier to issue a credit note where, after a tax invoice has been issued:

the taxable value or tax charged in the invoice is found to exceed what is actually payable;
the goods supplied are returned by the recipient; or
the goods or services supplied are found to be deficient.

The supplier "may" issue one — it's optional, but it is the only way to get the excess tax back through the return. Since 2019 a single credit note can cover several invoices of the same financial year, so a monthly consolidated note for all returns from one distributor is allowed.

A GST credit note does two things at once. It reduces the supplier's output tax liability for the month in which it is reported, and it reduces the input tax credit available to a registered buyer. Because the two must mirror each other, the law and the GST portal both link the supplier's reduction to the buyer's reversal — more on that below.

What is a debit note?

A debit note is the opposite. Section 34(3) says that where the taxable value or tax in an invoice is found to be less than what is payable, the supplier "shall" issue a debit note to the recipient. Typical cases are a price revision agreed after delivery, freight or packing charges that should have been billed, or tax charged at a lower rate than the correct one. The Explanation to section 34 adds that a debit note includes a supplementary invoice.

The word "debit note" is also used for an everyday trade document that has nothing to do with section 34. When a buyer returns goods, its accounts team often raises a "debit note" on the supplier to record the claim. That buyer's document doesn't adjust GST; the supplier still has to issue a GST credit note for the return. Many disputes over returns come from mixing up these two.

Credit note vs debit note under GST

	Credit note	Debit note
Issued by	Supplier	Supplier
Effect on invoice value	Reduces it	Increases it
Legal basis	Section 34(1)–(2), CGST Act	Section 34(3)–(4), CGST Act
Mandatory?	Optional ('may issue')	Mandatory ('shall issue')
Supplier's GST	Output tax reduced (if buyer reverses ITC)	Output tax increased
Buyer's ITC	Reduced	Increased (claim by 30 November after FY of the note)
Time limit to report	30 November after FY of supply, or annual return if earlier	Month of issue; no outer limit
GSTR-1 table	9B (registered / large B2C, exports); net in Table 7 for small B2C	Same tables

Issued by

Credit note: Supplier
Debit note: Supplier

Effect on invoice value

Credit note: Reduces it
Debit note: Increases it

Legal basis

Credit note: Section 34(1)–(2), CGST Act
Debit note: Section 34(3)–(4), CGST Act

Mandatory?

Credit note: Optional ('may issue')
Debit note: Mandatory ('shall issue')

Supplier's GST

Credit note: Output tax reduced (if buyer reverses ITC)
Debit note: Output tax increased

Buyer's ITC

Credit note: Reduced
Debit note: Increased (claim by 30 November after FY of the note)

Time limit to report

Credit note: 30 November after FY of supply, or annual return if earlier
Debit note: Month of issue; no outer limit

GSTR-1 table

Credit note: 9B (registered / large B2C, exports); net in Table 7 for small B2C
Debit note: Same tables

When can you issue a GST credit note? Common situations

Sales returns. Goods are returned because they're damaged, expired, the wrong specification or simply unsold under a sale-or-return arrangement. The credit note reverses the value and tax of the returned quantity.

Excess price or tax charged. The invoice used the wrong rate, the wrong quantity, a price higher than agreed, or wrongly charged IGST instead of CGST and SGST. Note that a wrong type of tax (IGST vs CGST/SGST) is usually corrected by a credit note for the whole invoice and a fresh invoice with the right tax.

Deficient goods or services. A batch fails quality inspection, or a maintenance contract was only partly delivered. The credit note reduces the value to what was actually supplied.

Post-sale discounts. This is the area that changed most and still causes confusion. Under the current section 15(3)(b), a discount given after the sale is excluded from the taxable value — and can be passed through a GST credit note — only if it was established in an agreement entered into at or before the time of supply, is specifically linked to the relevant invoices, and the buyer reverses the ITC attributable to it. Year-end volume rebates under a written distributor agreement usually qualify. A discount negotiated after the sale with no prior agreement doesn't, so it can only be given through a financial credit note.

An Indian shopkeeper standing at the counter of a small store stocked with tins and jars — When a retailer returns damaged stock or gets a price cut, the supplier's credit note is what reduces the tax on the original invoice.· Image: ShaluSharmaBihar (CC BY 2.0)

What changes with the Finance Act, 2026

The Finance Bill 2026 memorandum proposed amending section 15(3) to remove the need to link a post-sale discount to a prior agreement, requiring only a section 34 credit note and reversal of ITC by the recipient, and amending section 34 to refer to such discounts. The Finance Act, 2026 was enacted on 30 March 2026, but these particular GST amendments come into force only on a date the Central Government notifies. As of early September 2026 they had not been notified, and the pre-amendment text — including the prior-agreement condition — still applies. Check CBIC's notifications before relying on the new rule.

Time limit: the 30 November cut-off for credit notes

Section 34(2) requires a credit note to be declared in the return for the month in which it is issued, and not 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 for that year, whichever is earlier. The Finance Act, 2022 extended this from 30 September with effect from 1 October 2022, so older articles and some portal help pages still mention September.

Two points trip people up. First, the clock runs from the year of the original supply, not the year the credit note is issued. A sale made in March and returned in May belongs to the earlier financial year. Second, filing GSTR-9 early shortens your window: if you file the annual return for a year on 15 October, the cut-off for that year's credit notes becomes that date instead of 30 November. Businesses with turnover above ₹2 crore must file GSTR-9 by 31 December after the financial year, so for most of them 30 November is the effective deadline.

Credit note window for supplies made in a financial year (April–March)

April–March

Supply made; credit notes issued during the year are reported in that month's GSTR-1

April–October (next year)

Credit notes for last year's supplies can still be issued and reported

30 November

Last GSTR-1 in which they can be declared (or earlier, if GSTR-9 is filed first)

After the cut-off

Only a financial credit note — no reduction in GST

Debit notes have no equivalent cut-off: they must be reported in the return for the month of issue, and the extra tax is paid with that month's GSTR-3B. The buyer, however, faces a time limit to claim ITC on a debit note. Section 16(4) allows credit on a debit note up to 30 November following the end of the financial year in which the debit note was issued (or the annual return date, if earlier) — the reference to the debit note's own year, rather than the original invoice's, was inserted by the Finance Act, 2020.

What a credit or debit note must contain (Rule 53)

Rule 53(1A) of the CGST Rules lists the particulars every credit or debit note under section 34 must carry:

Rule 53(1A) — contents of a credit or debit note

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Keep a separate serial series for credit notes and debit notes so they are easy to report in Table 13 of GSTR-1, which asks for the range of documents issued. Rule 53(3) adds that any debit note issued for tax payable after a demand under section 74 (fraud or suppression) or on goods detained or confiscated under sections 129 or 130 must prominently carry the words "INPUT TAX CREDIT NOT ADMISSIBLE" — the buyer can't claim credit on it.

If your aggregate turnover requires e-invoicing (above ₹5 crore), B2B credit and debit notes must also be reported on the Invoice Registration Portal to get an IRN, just like invoices. Businesses with turnover of ₹10 crore or more must do so within 30 days of the document date or the portal rejects them. Our e-invoice guide covers the IRP steps, and the credit note generator produces a Rule 53-compliant note.

Reporting credit and debit notes in GSTR-1

Credit and debit notes are reported in GSTR-1 (or IFF for quarterly filers) for the month or quarter in which they are issued:

Recipient / supply	Where it goes in GSTR-1
Registered buyer (B2B)	Table 9B — credit/debit notes (registered), linked to the original invoice
Unregistered buyer, inter-State invoice above the B2C (large) limit, or exports	Table 9B — credit/debit notes (unregistered)
Unregistered buyer, other B2C (small) supplies	Net them off in Table 7 (B2C others) for the period
Correction of a note already reported	Table 9C — amended credit/debit notes

If you e-invoice, the IRP pushes B2B credit and debit notes into Table 9B automatically; check them before filing. Since the July 2025 tax period, the liability auto-filled in GSTR-3B from GSTR-1 can't be edited, so a missed or wrong note must be fixed in GSTR-1A before you file GSTR-3B, or in a later GSTR-1. Our GSTR-1 guide explains each table.

The buyer's side: ITC reversal and IMS

Since 1 October 2025, when the Finance Act, 2025 amendments were brought into force by Notification No. 16/2025–Central Tax, the proviso to section 34(2) says that no reduction in the supplier's output tax is allowed if the ITC attributable to the credit note, where availed, has not been reversed by a registered recipient — or, for other recipients, if the incidence of tax has been passed on to someone else. Before that, the proviso referred only to the incidence of tax being passed on.

A man in a traditional cap working on a desktop computer in a small office — Credit and debit notes are reported in GSTR-1 and, for e-invoice taxpayers, must get an IRN — usually from the same billing software as the invoice.· Image: anantal (CC BY 2.0)

The portal enforces this through the Invoice Management System (IMS). Every credit note you report lands on the buyer's IMS dashboard, where the buyer can accept, reject or — for credit notes, from the October 2025 tax period — keep it pending for one tax period. When the buyer accepts, the reduction flows into its GSTR-2B and its ITC is reduced; on the supplier's side, the liability reduction is honoured. If the buyer rejects it, the supplier's output tax doesn't come down by that amount. GSTN's advisory also lets a buyer declare the ITC actually availed on the original invoice, so it reverses only that amount — nothing if it never claimed credit, or a part if it claimed only part.

For the supplier, this means a credit note is no longer complete when you upload it. Tell the buyer to accept it in IMS, and follow up on rejected or pending notes before the month closes. If a buyer rejects a credit note after filing GSTR-3B, GSTN's advisory says the supplier must re-report it through GSTR-1A or a later GSTR-1 amendment. Our input tax credit guide covers the buyer's side in detail.

GST credit note vs financial (commercial) credit note

Not every credit note is a GST credit note. A financial or commercial credit note adjusts the commercial amount payable without changing the taxable value or GST of the original invoice. You use one when the conditions of section 34 or section 15(3)(b) aren't met — a discount agreed after the sale, a goodwill gesture, a credit given after the 30 November cut-off, or a rate difference you choose not to adjust in GST.

CBIC's Circular 251/08/2025-GST, issued on 12 September 2025, confirmed that where a supplier issues a financial or commercial credit note, the recipient doesn't need to reverse ITC, because the original value and tax remain unchanged. The supplier pays GST on the full original value; the buyer keeps the full credit. The circular also clarified that such post-sale discounts aren't generally consideration for a separate supply by the dealer, unless the dealer does something specific — like promotional activity under a defined contract — in return.

	GST credit note (section 34)	Financial / commercial credit note
Changes taxable value and GST	Yes	No
Supplier's output tax	Reduced (if buyer reverses ITC)	Unchanged
Buyer's ITC	Reversed	Unchanged
Reported in GSTR-1	Yes, Table 9B / Table 7	No
Time limit	30 November after FY of supply	None (commercial only)
Should say	"Credit Note" with Rule 53 details	Clearly marked as financial / without GST

Worked examples in ₹

All examples use the standard GST rate of 18% on an intra-State sale (split equally between CGST and SGST).

Example 1 — sales return. Kumar Electricals sells 100 switchboards at ₹1,000 each to a registered contractor: taxable value ₹1,00,000, GST ₹18,000 (CGST ₹9,000 + SGST ₹9,000), invoice total ₹1,18,000. Ten boards are returned damaged. Kumar issues a credit note for ₹10,000 plus GST of ₹1,800 (CGST ₹900 + SGST ₹900), quoting the original invoice number. It reports the note in Table 9B of that month's GSTR-1. The contractor accepts it in IMS and reverses ₹1,800 of ITC; Kumar's output tax falls by ₹1,800.

Example 2 — post-sale discount under an agreement. A distributor's agreement, signed in April, promises a 2% rebate on purchases above ₹50 lakh in the year. Purchases reach ₹60 lakh (GST ₹10.8 lakh), and in April of the next year the supplier issues a credit note for ₹1,20,000 plus GST of ₹21,600, linked to the year's invoices. Because the agreement predates the supplies and the distributor reverses ₹21,600 of ITC, the supplier can reduce GST — provided the note is reported by 30 November or before the supplier's GSTR-9, if filed earlier.

Example	Document	Supplier's GST	Buyer's ITC
1. Return of 10 boards	GST credit note ₹10,000 + ₹1,800	−₹1,800	−₹1,800
2. 2% rebate under prior agreement	GST credit note ₹1,20,000 + ₹21,600	−₹21,600	−₹21,600
3. Discount agreed after sale	Financial credit note ₹50,000	No change	No change
4. Undercharged price	Debit note ₹5,000 + ₹900	+₹900	+₹900
5. Defect found after cut-off	Financial credit note	No change	No change

Example 3 — discount agreed after the sale. The same supplier gives a different dealer a ₹50,000 "festival support" discount that was never agreed in advance. Under the current section 15(3)(b), this can't reduce the taxable value. The supplier issues a financial credit note for ₹50,000 with no GST, pays GST on the original invoices in full, and the dealer keeps its full ITC.

Example 4 — debit note for an undercharged price. A packaging supplier invoiced 100 units at ₹500 (₹50,000 + ₹9,000 GST), but the agreed price was ₹550. It issues a debit note for ₹5,000 plus GST of ₹900, quoting the original invoice, reports it in that month's GSTR-1 and pays the ₹900 with that month's GSTR-3B. The buyer can claim ₹900 of ITC on the debit note.

Example 5 — missing the cut-off. A sale was made in February. The buyer reports a quality defect in December of the following financial year — after 30 November. The supplier can still compensate the buyer, but only through a financial credit note; the GST paid on the original invoice can't be reduced.

Common mistakes and how to fix them

Issuing the credit note in the wrong year's window. Keep a monthly list of returns and claims pending against last year's supplies, and clear them before 30 November — and before you file GSTR-9.

Not quoting the original invoice. Rule 53 requires the serial number and date of the original invoice(s). A note without them can be challenged, and the portal needs them to link the note in Table 9B.

Giving discounts that don't qualify, then reducing GST. Without a prior agreement linked to the invoices, a post-sale discount needs a financial credit note under the current law. Reducing GST anyway invites a demand with interest.

Ignoring IMS. A credit note rejected or left pending by the buyer won't reduce your liability. Check the outward supplies dashboard each month.

Treating the buyer's purchase-return debit note as the GST document. The supplier still has to issue a GST credit note; the buyer's internal debit note doesn't change anyone's tax.

Using credit notes to cancel invoices that should have been cancelled. If an e-invoice was raised in error, cancel the IRN within the allowed window; after that, a full credit note is the fix.

Official links

What to do next

Create a compliant note with the free credit note generator or raise the corrected bill with the invoice generator, then report it in the month's GSTR-1 using our GSTR-1 guide. If you are the buyer, check IMS and reverse ITC as explained in the input tax credit guide, and keep an eye on CBIC notifications for the Finance Act, 2026 change on post-sale discounts.

This is general information, not legal or tax advice — confirm on the official source or with a professional.

Frequently asked questions

A credit note is a document a supplier issues to a buyer to reduce the amount of an earlier invoice — because goods were returned, the price or tax was charged too high, a discount was given after the sale, or goods or services were deficient. Under GST it is governed by section 34 of the CGST Act, and a valid credit note lets the supplier reduce the tax it pays on that invoice.

Sources & verification

Figures on this page were checked against the sources below when it was last reviewed on 8 October 2026. Each rate and limit is stored once with its own official source and review date, and official update channels are monitored daily so changes are picked up. How we verify

1.CGST Act, 2017 — section 34 (credit and debit notes), with amendment history — CGGST (statute compilation) · accessed 8 October 2026
2.Rule 53, CGST Rules — revised tax invoice and credit or debit notes — GSTZen · accessed 8 October 2026
3.Notification No. 16/2025–Central Tax (Finance Act 2025 GST provisions in force from 1 October 2025) — CBIC (copy hosted by TaxO) · accessed 8 October 2026
4.FAQs > Form GSTR-1 — GSTN (GST portal user guide) · accessed 8 October 2026
5.Finance Bill 2026 — Memorandum explaining provisions — Ministry of Finance · accessed 8 October 2026
6.Recent updates in GST: statutory, administrative and judicial developments — TaxGuru · accessed 8 October 2026
7.GSTN issues advisory on changes introduced in the Invoice Management System — EY India · accessed 8 October 2026
8.CBIC Circular 251/08/2025-GST and post-sale discounts: a practical guide — RebateLedger · accessed 8 October 2026

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