GST on rebates in India

When a discount reduces the taxable value

Section 15(3) of the CGST Act excludes a discount from the value of supply in two situations. 15(3)(a) — a discount given before or at the time of supply and recorded on the invoice — is simple and carries no downstream conditions.

15(3)(b) — a post-supply discount — is the hard one. It is excluded from value only if both cumulative conditions are met:

• i
  the discount is established in terms of an agreement entered into at or before the time of supply, and specifically linked to the relevant invoices; and
• ii
  the recipient has reversed the input tax credit attributable to the discount, on the basis of a document issued by the supplier.

If either prong fails, the discount cannot be deducted and GST stands on the gross, pre-discount value.

Source: CGST Act 2017, Section 15(3) (via the CBIC tax-law repository, taxinformation.cbic.gov.in). The Finance Act 2026 substitution was assented 30 March 2026; commencement notification pending as of late 2026.

A GST credit note — or a credit note that carries no GST

To actually reduce output tax, the supplier issues a Section 34 tax credit note. But Section 34(1) is exhaustive: a tax-reducing credit note is only valid where the value or tax charged exceeds what’s payable, goods are returned, or goods/services are deficient. And it must be declared in the return by a hard deadline:

This is where the crucial distinction bites. A GST (Section 34) credit note reduces the supply’s value and tax — supplier reduces output tax, recipient reverses ITC. A financial or commercial credit note is a pure price adjustment that carries no GST: the original invoice value and tax are unchanged. Year-end, volume, and target rebates that fail 15(3)(b) can only go out as financial credit notes — so the money is refunded, but the GST on the full pre-discount value stays the supplier’s cost. CBIC Circular 92/11/2019 confirms exactly this for secondary discounts.

Sources: CGST Act Section 34; Finance Act 2022 §102 (Notification 18/2022-Central Tax). CBIC Circular 92/11/2019-GST (7 Mar 2019), cbic-gst.gov.in.

Discount, or a taxable service in disguise?

The most litigated question in Indian rebate GST: is the incentive a true discount (a unilateral price reduction where the buyer does nothing but buy) or consideration for a service the dealer supplies back? The decisive test, consistent across CBIC circulars and advance rulings, is whether the recipient is under a contractual obligation to perform a distinct, identifiable activity — advertising, a sales drive, co-branding, customer support — for defined consideration. If so, it’s a taxable service and the dealer must charge GST; if not, it’s a discount.

CBIC’s position here has shifted repeatedly — the much-cited Circular 105/24/2019 was withdrawn ab initio (as if never issued) and should not be relied on. The current clarification, Circular 251/08/2025, holds that an ordinary manufacturer-to-dealer post-sale discount in a principal-to-principal sale is not consideration for the dealer’s onward supply, and that dealer promotional activity is taxable only under an explicit agreement for defined activities. Advance rulings on the point exist on both sides — but note they bind only the applicant under Section 103, not as general precedent.

Sources: CBIC Circular 251/08/2025-GST (12 Sep 2025); Circular 105/24/2019 withdrawn ab-initio by Circular 112/31/2019 (3 Oct 2019). Advance rulings are persuasive, not binding precedent (CGST Act s.103).

The rebate is real — the GST relief leaks away

Where Indian manufacturers and distributors lose the GST they were entitled to recover, or draw a departmental notice:

• 1
  No invoice linkage. Aggregate turnover or period-end rebates can’t be mapped to individual invoices across a high-volume dealer network — so they fail 15(3)(b)(i).
• 2
  No provable pre-agreement. Rebates communicated by later circulars, emails, or retrospective dealer letters fail the “agreement at or before supply” condition.
• 3
  The ITC-reversal dependency. The supplier’s output-tax reduction hinges on the recipient reversing ITC — a counterparty action the supplier can’t compel. A Finance Act 2025 proviso to Section 34(2) (in force 1 October 2025) makes this a hard legal gate, enforced through the Invoice Management System.
• 4
  The 30 November cutoff. Annual and volume schemes finalised after year-end routinely miss the window — the commercial credit is booked, the GST relief is permanently lost.
• 5
  Return reconciliation. Credit notes must flow consistently through GSTR-1, GSTR-3B and GSTR-9; omission or duplication is a leading source of annual-return mismatches and scrutiny.
• 6
  Service recharacterisation. Incentives tied to dealer activity can be reclassified as a taxable service — a different liability entirely.

Questions teams ask

Does a post-sale discount reduce GST in India?

Only if both Section 15(3)(b) conditions are met: pre-agreed and invoice-linked, and the recipient reverses the attributable ITC. Either prong failing means GST stands on the full value. (A Finance Act 2026 relaxation is enacted but not yet notified.)

What is the GST credit-note deadline?

30 November following the financial-year-end of the original supply, or the GSTR-9 date, whichever is earlier (changed from September by the Finance Act 2022). Miss it and the GST relief is barred.

Why do many trade rebates not reduce GST?

They’re decided after supply, not pre-agreed, and not invoice-linked, so they fail 15(3)(b) and go out as financial credit notes carrying no GST — the supplier keeps the GST cost. Circular 92/11/2019 confirms this for secondary discounts.

When is a dealer incentive taxed as a service?

When the dealer is contractually obliged to perform a distinct activity (advertising, a sales drive) for defined consideration. Circular 251/08/2025 is the current clarification.

Educational summary, not tax advice. Indian GST law and CBIC circulars in this area change frequently and are actively litigated; the Section 15(3)(b) position is mid-transition (a Finance Act 2026 amendment is enacted but not yet notified as of late 2026). Confirm the current statute, circulars, and commencement notifications with CBIC and a qualified adviser before relying on anything here. Aurgus is in the design-partner phase.