A distributor meets a quarterly sales target, and the supplier grants a rebate after the original invoices were issued. Can the supplier reduce GST on those sales? From 1 November 2026, the amended law gives a clearer route: issue a GST credit note under section 34 and ensure the recipient reverses the input tax credit (ITC) attributable to the discount. The answer still depends on the type of credit note, the reporting deadline and the underlying transaction.
Notification No. 03/2026–Central Tax, dated 26 October 2026 , appoints 1 November 2026 for sections 153–155 of the Finance Act, 2026. These amend sections 15(3)(b), 34(1) and 54(6)/(14) of the Central Goods and Services Tax (CGST) Act. The Finance Act text in the Gazette is the primary source; the notification puts those provisions into force.
Key distinction: A GST tax credit note that reduces the taxable value and tax calls for the recipient’s corresponding ITC reversal. A financial or commercial credit note that leaves the original GST charged and supplier’s tax liability unchanged generally does not trigger reversal merely because the buyer pays a lower commercial price. Classify the document before changing returns.
What changed on 1 November?
| Provision | Practical effect |
|---|---|
| Section 15(3)(b) | A post-supply discount can be excluded from taxable value if the supplier issues a section 34 credit note and the recipient reverses attributable ITC. |
| Section 34(1) | Expressly permits a credit note where a section 15(3)(b) discount is given. |
| Section 54(6) | Extends the statutory provisional-refund route to eligible unutilised ITC arising from inverted duty structure. |
| Section 54(14) | Removes the ₹1,000 minimum-refund bar for goods exported with payment of tax. |
The old section 15(3)(b) required the discount to be established by an agreement made at or before supply and specifically linked to relevant invoices, besides reversal of attributable ITC. The substituted clause no longer states those pre-agreement and specific-linkage conditions. The 56th GST Council release explained the policy, but the enacted Finance Act and commencement notification govern. Removing a statutory condition does not mean your business can dispense with a clear audit trail or the remaining section 34 requirements.
GST credit note versus commercial credit note
A GST tax credit note under section 34 changes the tax position of the original supply. Where the amended section 15(3)(b) applies, the supplier seeks to exclude the discounted amount from taxable value, declares the note in the relevant GST return and reconciles the reduced tax. The registered buyer reverses ITC attributable to that discount if it had availed the credit. Section 34(2)'s proviso separately restricts a supplier’s reduction of output tax liability if a registered recipient has not reversed attributable ITC, where availed.
A commercial or financial credit note adjusts only the price between the parties. The supplier does not reduce the GST originally charged or its output tax liability on that basis. CBIC Circular No. 251/08/2025-GST , available from the Karnataka GST department, clarifies that the recipient need not reverse ITC merely because such a note reduces the amount paid: the original transaction value and tax are not reduced. Usual ITC eligibility rules still apply.
That distinction is important when a year-end scheme is settled through accounting entries. Calling every rebate a “credit note” in the ledger is insufficient to determine the tax treatment. Check whether the document includes a GST adjustment, how it was reported, and whether the buyer’s tax credit follows it.
Example: a ₹50,000 post-sale rebate
Suppose an October 2026 sale was billed at ₹5,00,000 plus 18% GST (₹90,000). In November the supplier grants a ₹50,000 rebate. Assuming the whole supply is at 18%, the tax attributable to the discount is ₹9,000.
Route A — GST credit note: The supplier issues an eligible tax credit note for ₹50,000 plus ₹9,000 GST, reports it within the section 34 time limit and seeks the corresponding tax adjustment. If the registered customer had claimed the full ₹90,000 ITC, it reverses ₹9,000. Both sides retain the original invoice, discount decision, credit note and reconciliation evidence. Eligibility and any other section 34 restrictions still need checking.
Route B — commercial credit note: The supplier grants ₹50,000 as a price concession but leaves the original ₹90,000 GST and tax liability unchanged. The customer’s payment becomes lower commercially; the note itself does not reduce GST and, under Circular 251/08/2025-GST, does not alone require the customer to reverse ₹9,000 ITC.
The numbers illustrate the document choice. A rebate tied to a separately supplied promotional service, or a special arrangement involving a dealer and an end customer, needs its own analysis. Circular 251/08/2025-GST discusses these situations; do not automatically treat every incentive as a discount on the original sale.
The credit-note deadline still matters
The amendment to section 15 removes the old pre-agreement and invoice-linkage wording, but section 34(2) remains. A supplier must declare a GST credit note no later than 30 November following the financial year of the original supply, or the date of furnishing the relevant annual return, whichever is earlier. This is a return-reporting cut-off connected to the original supply year, not a fresh year counted from the rebate decision.
For an October 2026 supply in FY 2026–27, the ordinary statutory outer date would be 30 November 2027, subject to an earlier annual return and applicable law. An invoice from an older financial year can have a much closer deadline. Check each underlying supply year before promising a customer a GST-adjusted rebate. Keep enough invoice references and calculation records to explain what was reduced even though the amended section 15 clause no longer expressly requires specific invoice linkage as a condition.
Also distinguish an invoice issued before 1 November 2026 from a discount and credit note created after that date. The commencement notification does not expressly settle every transitional fact pattern. For older supplies, review the transaction dates, earlier law, section 34 deadline and any later CBIC clarification before applying the amended condition.
What changes for refunds?
Section 155 of the Finance Act amends section 54(6) so the provisional-refund provision extends to qualifying claims of unutilised ITC under clause (ii) of the first proviso to section 54(3)—the inverted duty structure category. This puts that refund route in the statute. It is not a promise that every claim gets an immediate or automatic payment; eligibility, risk checks, rules and portal procedure still matter.
The same Finance Act section amends section 54(14). Its general bar on payment of refunds below ₹1,000 no longer applies to a refund of tax claimed on goods exported out of India with payment of tax. Do not extend that exception to every export or inverted-duty claim. A separate GST Council/PIB refund explanation distinguishes the export-with-payment exception from the continuing general threshold.
These refund changes share the 1 November commencement date, but they are distinct from the discount and credit-note rules. They do not create a special refund of every post-sale rebate.
A practical process for suppliers and buyers
- Decide what the payment represents. Is it a price discount on an earlier supply, consideration for marketing or another service, or part of a dealer/end-customer pricing arrangement? Review the contract and actual work performed.
- Choose the correct document. If the supplier intends to reduce taxable value and GST, assess section 15(3)(b) and issue a section 34 tax credit note. If GST remains unchanged, issue and account for a commercial note as such.
- Calculate the tax accurately. Reconcile the original rate, taxable amount, discount, tax head and buyer details. For mixed-rate supplies, do not simply apply one rate to the full rebate.
- Check the year and cut-off. Record the financial year of the original supply and the earlier of the section 34(2) deadline or annual-return filing date.
- Agree the buyer’s ITC response. For a GST-adjusted note, have the registered buyer identify and reverse attributable ITC if availed. Retain appropriate confirmation and supporting records.
- Reconcile returns and books. Compare the supplier’s credit-note reporting and output-tax adjustment with the recipient’s purchase records and ITC reversal. Resolve rejected or unmatched notes through the current GST portal workflow.
- Review refund claims separately. Inverted-duty claimants and exporters of goods with payment of tax should check the revised section 54 provisions alongside the current refund rules and portal guidance.
Questions businesses should resolve before issuing a rebate
- Was the original supply made in a financial year for which GST credit-note reporting is still open?
- Does the recipient have full, partial or no ITC on the original invoice? Is any credit attributable to the discount actually availed?
- Is the supplier changing GST in its return, or only settling a commercial price difference?
- Is the incentive truly a rebate, or is the dealer performing a separately priced promotional service?
- Can both parties explain the calculation from invoice and scheme records if the transaction is reviewed later?
A simple agreement between sales, finance and the buyer’s accounts team avoids the most common error: one party treating the rebate as a GST reduction while the other leaves the original ITC untouched.
Official references
- Notification No. 03/2026–Central Tax in the Gazette — commencement of Finance Act sections 153–155.
- Finance Act, 2026, sections 153–155 — amendments to CGST sections 15, 34 and 54.
- CBIC Circular No. 251/08/2025-GST — treatment of commercial notes and certain dealer incentives.
- 56th GST Council recommendations — policy background to the discount reform.
TaxQue can help review your rebate terms, credit-note sequence and return reconciliation. Contact info@taxque.in with the original invoice and proposed discount details.
