Legislative Evolution of Section 15(3)(b) of CGST Act, 2017 & Interpretive Uncertainties That Remain
CA Aksh Jain AIR 44, CA Final
The determination of taxable value is foundational to any value-added tax system. In India’s GST framework, Section 15 of the CGST Act, 2017, along with Valuation Rules under CGST Rules, 2017 establishes the valuation architecture, anchoring it to the concept of ‘transaction value’ — the price actually paid or payable for the supply —while specifying inclusions and exclusions that shape the base on which tax is computed. Among these exclusions, Section 15(3)(b) occupies a particularly contested space: it addresses the deductibility of discounts that are not known or agreed upon at the time of supply but are granted subsequently, after the original invoice has been issued.
Post-supply discounts are an integral feature of commercial practice across virtually every sector of the Indian economy. Volume rebates, trade discounts, year-end settlement discounts, and promotional allowances are commonplace in manufacturing, pharmaceuticals, fast-moving consumer goods (FMCG), automotive distribution, and retail. In each case, the commercial question of when and how much to discount is typically resolved after the original supply has occurred. The legal question — whether and how that discount reduces the supplier’s GST liability — has, since the inception of GST in July 2017, generated more litigation, regulatory back-and-forth, and compliance confusion than almost any other valuation issue in the statute.
The evolution of Section 15(3)(b) from its original three-condition framework to the present single-condition regime traverses four distinct phases: the original provision (2017-2024), the circular-imposed compliance overlay of Circular 212/6/2024-GST, the 56th GST Council’s structural intervention and Circular 251/08/2025-GST, and the Budget 2026 statutory amendment. This article examines each phase in doctrinal sequence, evaluates the policy rationale and legal soundness of each intervention, and identifies the interpretive uncertainties that the most recent reform has left open.
The question is two-fold: First being, whether the legislative evolution from three conditions to one represents a principled doctrinal simplification consistent with the neutral treatment of discounts under a destination-based VAT system; and the second, whether the current statutory framework, as amended, is complete and self-sufficient, or whether it requires further legislative and administrative action to achieve the certainty that commercial practice demands.
The Valuation Architecture of Section 15 and the Role of Discounts
A. The Transaction Value Principle
Section 15(1) of the CGST Act establishes that the value of a supply of goods or services or both shall be the transaction value, being the price actually paid or payable for the said supply where the supplier and the recipient of the supply are not related and the price is the sole consideration for the supply. The transaction value principle is a deliberate departure from earlier indirect tax regimes — particularly the Central Excise regime — which relied on the concept of ‘normal price’ or ‘assessable value’ and generated a disproportionate volume of litigation around the notion of what price a supplier ‘should have’ charged in an arm’s-length transaction.
Section 15(2) enumerates amounts includible in the transaction value: taxes and duties other than GST, amounts paid by the recipient but required to be paid by the supplier, incidental expenses charged by the supplier, interest or late payment charges, and subsidies directly linked to the price. Section 15(3) then carves out two categories of deductible amounts: Section 15(3)(a) addresses pre-supply discounts that are known and agreed at or before the time of supply and are mentioned in the invoice; Section 15(3)(b) addresses post-supply discounts.
B. Pre-Supply vs. Post-Supply Discounts — The Structural Distinction
The distinction between pre-supply and post-supply discounts is not merely temporal — it reflects a difference in the information available at the time the tax liability crystallises. A pre-supply discount is, by definition, known at the time the invoice is issued. The supplier can reduce the invoice value directly, charge GST on the reduced amount, and the entire transaction is tax-compliant without any further action. The ITC available to the recipient corresponds to the GST actually charged, and no mismatch arises.
A post-supply discount, by contrast, is determined after the supply has occurred and the original invoice — with its full transaction value and corresponding GST charge — has already been issued and filed in the GST returns. The recipient has taken ITC on the original GST charged. When the discount is subsequently granted, the taxable value of the original supply changes retrospectively. This creates a double adjustment problem: the supplier must reduce their output GST liability, and the recipient must reverse a corresponding portion of ITC. The mechanism for achieving this symmetry — and the conditions under which it is permissible — is the subject matter of Section 15(3)(3).
The Original Section 15(3)(b) — Three Conditions and Their Structural Defects
A. The Three Conditions
As enacted and operative from 1st July 2017, Section 15(3)0)) permitted the deduction of a post-supply discount from the taxable value of supply, provided three conditions were cumulatively satisfied:
(i) the discount is established in terms of an agreement entered into at or before the time of such supply — the pre-agreement condition;
(ii) the discount is specifically linked to relevant invoices — the invoice-linkage condition;
(iii) the recipient of the supply reverses the credit attributable to the discount — the ITC reversal condition.
B. The Third–Party Dependency Problem
The ITC reversal condition is, from a structural standpoint, the most problematic of the three. A supplier’s ability to reduce their output tax liability — and therefore their net GST payment to the Government — is made contingent on a compliance action by the recipient. The supplier has no direct means of compelling the recipient to reverse ITC, no statutory right to demand proof of reversal as a condition of the commercial relationship, and no administrative mechanism to verify whether the reversal has occurred. Yet the supplier’s liability continues until the recipient acts.
This structural design flaw was not merely theoretical. In practice, disputes between suppliers and recipients over discount arrangements were common. A supplier issuing a credit note to the recipient — thereby formally reducing the transaction value — found that the legal effect of that reduction on the supplier’s own tax liability was deferred indefinitely until the recipient completed the reversal. In the absence of any portal-level mechanism to link supplier credit notes to recipient ITC reversals, verification was impossible.
C. The Pre–Agreement Condition and Commercial Reality
The pre-agreement condition created a different category of problem. Commercial discount arrangements in India frequently do not take the form of written contracts executed before the first supply under the arrangement. Volume rebates are often communicated through emails, circulars, or retrospective dealer letters. Year-end settlement discounts may be decided at the close of the financial year based on actual volumes achieved. Promotional allowances passed by manufacturers to distributors may be announced through trade circulars mid-season. None of these common commercial practices constituted an ‘agreement entered into at or before the time of such supply’ in any strict interpretation of the phrase.
The consequence was that a significant portion of commercially legitimate discount arrangements were, under the strict reading of Section 15(3)(b), ineligible for deduction from taxable value. Suppliers faced a choice between structuring every commercial discount as a formal pre-agreed contract (which was commercially impractical) or foregoing the tax benefit of the discount altogether.
Circular 212/6/2024-GST — An Administrative Overreach?
A. The Content of Circular 212
On 26th June 2024, CBIC issued Circular 212/6/2024-GST, purportedly clarifying the documentation requirements for post-supply discounts under Section 15(3)(b). The circular mandated that suppliers, in order to avail the benefit of the ITC reversal condition being satisfied, must obtain:
(a) A certificate from a Chartered Accountant or Cost and Management Accountant, carrying a UDIN, confirming that the recipient had reversed the ITC attributable to the discount — for discount amounts exceeding Rs. 5 lakhs;
(b) A self-declaration or undertaking from the recipient for amounts below Rs. 5 lakhs.
The circular was presented as a practical mechanism to address the verification problem identified above — giving suppliers a documentary basis for claiming that the ITC reversal condition was satisfied.
B. The Ultra Vires Question
Circular 212 was criticised almost immediately from a constitutional and administrative law standpoint. The central objection was that CBIC, exercising its power under Section 168(1) of the CGST Act to issue instructions for the purpose of ‘uniformity in the implementation of the Act,’ cannot impose a substantive compliance condition — the production of a third-party professional certificate — that has no foundation in the statute or in the Rules framed thereunder.
Section 168(1) is an enabling provision for clarificatory instructions, not a source of legislative power. A circular issued under this provision can clarify the application of an existing statutory provision; it cannot add to the conditions or obligations specified in the statute itself. The CA/CMA certificate requirement was precisely such an addition: the statute required ITC reversal; the circular required documentary proof of that reversal in a specified form, from a specified category of professional, with a specified tracking mechanism (UDIN). None of these elements appear in Section 15(3)(b), Section 34, or anywhere in the CGST Rules.
The Delhi High Court, in proceedings arising out of a writ petition filed by M/s JSW Steel Limited challenging Circular 212, issued notice to the Government and declined to dismiss the petition at the threshold stage, signalling that the challenge was at least prima facie tenable. An interim order staying the operation of the circular was reportedly passed in the petitioner’s favour, although this has not been reported as a precedent-setting ruling.
C. The Practical Fallout
Quite apart from the legal challenge, Circular 212 created significant compliance distress in practice. Suppliers dealing with hundreds or thousands of recipients across multiple states found it operationally infeasible to obtain UDIN-backed CA certificates for every credit note. The cost of certification — for a large manufacturer issuing hundreds of annual settlement credit notes — was not trivial. Recipients, for their part, were often unwilling to incur the cost and effort of obtaining a professional certificate merely to enable their supplier’s tax benefit. The circular inadvertently incentivised suppliers to avoid issuing credit notes altogether — which ran directly contrary to the policy purpose of facilitating legitimate discount deductions.
The 56th GST Council Intervention and the Withdrawal of Circular 212
At its 56th meeting held on 3rd September 2025; the GST Council recommended a structural reconstitution of Section 15(3)(b). The Council’s recommendation, subsequently implemented through amendments to the CGST Act and the withdrawal of Circular 212 via Circular 253/10/2025-GST, effected two related changes:
First, the pre-agreement condition and the invoice-linkage condition — the first and second limbs of Section 15(3)(b) — were recommended for omission from the statute. The amendment, once given legislative effect through the Finance Act 2026, leaves Section 15(3)(b) with a single operative condition: the ITC reversal by the recipient, now to be effected through the mechanism of a credit note under Section 34.
Second, simultaneously, Circular 251/08/2025-GST dated 12th September 2025 addressed three categories of post-sale discount that had generated distinct compliance disputes, providing clarifications on: (a) the ITC position of recipients who receive financial or commercial credit notes (as opposed to tax credit notes); (b) the treatment of manufacturer-to-dealer discounts in principal-to-principal supply chains; and (c) the distinction between genuine discounts and promotional services rendered by dealers.
Under Circular 251, where a supplier issues a financial or commercial credit note — one that does not reduce the original GST liability — the recipient is not required to reverse any ITC because the original transaction value and corresponding tax charge remain unchanged. This clarification is significant because it resolves a long-standing ambiguity about what happens when the commercial arrangement involves a discount that the supplier passes on financially without reducing their GST output.
The Amended Section15(3)(b) — From Three Conditions to One
The substituted Section 15(3)(b), operative upon the Finance Act 2026 receiving Presidential assent, reads in its material part as follows: a discount that is given after the supply has been effected shall be included in the value of supply unless the recipient reverses the credit attributable to the discount on the basis of a credit note issued by the supplier under Section 34. The pre-agreement condition and invoice-linkage condition have been removed entirely.
The structural logic of the amended provision is straightforward. A post-supply discount reduces taxable value if and only if two things happen: the supplier issues a credit note under Section 34 (thereby formally recording the transaction value reduction), and the recipient reverses the ITC attributable to the discount amount. The symmetry is maintained — the supplier’s output reduction is matched by the recipient’s input reduction. What has changed is that this symmetry can now be achieved for any commercially agreed discount, not just those that were pre-agreed before the first supply occurred.
The reform is broadly consistent with the treatment of post-supply price adjustments in other major VAT systems. However, as the following sections demonstrate, the simplification of conditions has not eliminated all sources of interpretive uncertainty — it has, in some respects, created new ones.
The Definition Vacuum: What is a ‘Discount’ Under the Amended Provision? A. The Definitional Function of the Pre-Agreement Condition
It is submitted that the pre-agreement condition in the original Section 15(3)(b) served not only an administrative function (ensuring that discount arrangements were structured as formal contracts) but also an implicit definitional function: by requiring that a discount be ‘established in terms of an agreement entered into at or before the time of supply,’ the provision demarcated the class of value reductions that qualified as a ‘discount’ for Section 15 purposes. A unilateral post-supply credit issued by a supplier for reasons unrelated to any pre-existing commercial arrangement — whether as an ex-gratia gesture, a settlement payment, or a commercial credit — would, on this reading, fall outside the definition of ‘discount’ and therefore outside the scope of Section 15(3)(b) altogether.
With the removal of the pre-agreement condition, this definitional boundary has been dissolved. The amended Section 15(3)(b) does not define ‘discount.’ The CGST Act does not contain a definition of ‘discount’ anywhere in its text. The CGST Rules do not provide one. No CBIC circular has, to date, addressed what constitutes a ‘discount’ as distinct from: a voluntary price reduction; an ex-gratia credit; a compensation payment; a settlement of a commercial dispute; or a reduction granted unilaterally by the supplier to improve cash flow or maintain a commercial relationship.
A. The Interpretive Consequences
The absence of a statutory definition of ‘discount’ in the amended provision creates three categories of interpretive dispute that are likely to generate litigation:
First, the question of unannounced or surprise discounts: Under commercial arrangements common in the FMCG and pharmaceutical sectors, manufacturers periodically announce post-facto discount schemes — often linked to stock levels, festive seasons, or competitive pressure — without any prior formal agreement with distributors. Under the original Section 15(3)(b), such discounts would not qualify because there was no pre-existing agreement. Under the amended provision, the pre-agreement condition no longer exists, but the question remains: does a unilaterally announced discount, communicated after the supply, constitute a ‘discount’ for the purpose of reducing taxable value, or is it a separate transaction in the nature of a commercial incentive?
Second, the question of stock liquidation and clearance credits: In retail and distribution, credits are frequently passed down the supply chain to enable dealers to clear slow-moving or obsolete inventory at prices below the original purchase cost. These credits may bear no relationship to the original invoice and may be issued months after the supply. Whether such credits constitute a ‘discount’ under Section 15(3)(b) — entitling the issuing party to reduce its original GST liability — or a separate supply of service (compensation for holding or liquidating inventory) is a question the amended provision does not answer.
Third, the question of contractual price adjustments: In certain industries — particularly construction, engineering procurement and construction (EPC), and infrastructure — the contract price is subject to post-completion adjustment clauses linked to performance, material escalation indices, or regulatory approvals. When the final price is lower than the invoiced price, is the reduction a ‘discount’ under Section 15(3)(b) or a separate commercial adjustment outside the valuation provision altogether?
These are not merely theoretical questions. They represent the next wave of GST valuation disputes, and their resolution will depend entirely on how the term ‘discount’ is interpreted in the absence of a statutory definition.
The Retrospective Exposure Problem — Past Periods, Circular 212 Certificates and the Cure Question
A. The Problem Stated
Circular 253/10/2025-GST withdrew Circular 212/6/2024-GST with effect from its date of issue. The question that has not been addressed — either in Circular 253, in any subsequent CBIC instruction, or in the Finance Act 2026 amendment — is the consequence of that withdrawal for past-period assessments and pending scrutiny proceedings.
The period from 26th June 2024 (when Circular 212 came into effect) to October 2025 (when Circular 253 withdrew it) spans approximately sixteen months. During this period, GST field formations across India issued show-cause notices, audit reports, and demand orders to suppliers who had claimed deductions under Section 15(3)(b) without producing the CA/CMA certificate required by Circular 212. A number of these proceedings remain pending as of the date of this article.
B. Three Categories of Affected Cases
The affected cases fall into three distinct categories:
Category 1 — Cases where assessment orders have been finalised on the basis of Circular 212’s certificate requirement. Where an Assessing Officer has issued a demand on the ground that the supplier failed to produce a CA/CMA certificate and has closed the assessment, the question is whether Circular 253 — which withdraws the basis for the demand — constitutes grounds for revision or rectification of the assessment order. The answer is not straightforward: a circular withdrawing another circular does not retrospectively nullify administrative actions taken in reliance on the earlier circular, unless the withdrawal circular expressly so provides.
Category 2 — Cases where proceedings are pending at the show-cause notice stage. Where the SCN has been issued but no order has been passed, the supplier can resist the demand on the basis that Circular 212 has been withdrawn and therefore the basis for the SCN no longer exists. However, if the underlying SCN also alleged violation of Section 15(3)(b) on grounds independent of the circular — for instance, that the ITC reversal by the recipient did not occur — the withdrawal of Circular 212 does not cure that independent ground.
Category 3 — Cases where suppliers obtained the CA/CMA certificate but now seek the certificate cost to be recognised as a compliance cost under GST. This is the most textured category. Suppliers who complied with Circular 212 — at cost — and obtained MN-backed certificates from CA/CMAs now find that the very requirement that generated that cost has been withdrawn as legally invalid. Whether the compliance cost is recoverable as a credit or deductible as an input service is not addressed anywhere in the GST framework.
C. The Bombay HC Reference — A Cautionary Signal
It is noteworthy that in a separate proceeding before the Bombay High Court (not the JSW Steel Delhi HC matter), a petitioner’s counsel sought to rely on the Delhi HC’s interim order in the JSW Steel case. The Bombay HC observed that the Delhi HC order was ‘an interim order and in any case, the respondents were permitted to continue with the proceedings to adjudicate the show cause notice’ — declining to treat the interim Delhi HC stay as a binding authority on field formations outside Delhi.
This is significant for Category 1 and Category 2 cases. Circular 212 was in effect across India. The fact that a Delhi HC interim order was not treated as binding in Bombay suggests that field formations in different states may have proceeded to finalise assessments on the basis of Circular 212’s requirements, regardless of the Delhi HC proceedings. Circular 253’s withdrawal does not automatically undo those orders.
D. A Call for a Curative Circular
The Government’s failure to address the retrospective exposure problem in Circular 253 itself is an oversight that merits correction. A curative circular — issued under Section 168(1) of the CGST Act — should clarify:
(a) that pending SCNs and assessments premised exclusively on non-compliance with Circular 212’s certificate requirement stand abated;
(b) that past-period deductions under Section 15(3)(b), where the ITC reversal by the recipient has occurred but no CA/CMA certificate was obtained, shall be treated as validly claimed for all periods prior to the withdrawal of Circular 212; and
(c) that no adverse inference shall be drawn in any audit or scrutiny proceeding on account of non-production of a Circular 212 certificate for periods covered by that circular’s operation.
Legislative and Administrative Recommendations
Recommendation 1: Statutory Definition of ‘Discount’
The most pressing gap in the amended Section 15(3)(b) is the absence of a definition of ‘discount.’ Either through an insertion in the CGST Rules, Government & CBIC should provide a statutory definition that:
(a) distinguishes a ‘discount’ from a voluntary price reduction, a compensation payment, or an ex-gratia credit;
(b) specifies that a discount need not be pre-agreed but must be referable to an identifiable commercial basis (volume, settlement, season, or promotional scheme) communicated to the recipient either before, at the time of, or within a specified period after the supply;
(c) clarifies the treatment of stock liquidation credits and contractual price adjustment clauses, either by including or excluding them from the definition.
Recommendation 2: A Curative Circular for Past-Period Assessments
Circular 253’s withdrawal of Circular 212 is prospectively effective. As analysed above, it does not provide any relief for suppliers who face pending assessments, confirmed demands, or open scrutiny proceedings arising from noncompliance with Circular 212. A dedicated curative circular should be issued under Section 168(1) of the CGST Act, providing that:
(a) all proceedings premised exclusively on the CA/CMA certificate requirement of Circular 212 are abated with effect from the date of withdrawal;
(b) deductions under Section 15(3)(b) claimed for periods within Circular 212’s operation, where ITC reversal by the recipient occurred but no certificate was obtained, shall be treated as validly claimed;
(c) no adverse inference shall be drawn in any assessment, audit, or appeal on account of non-production of a Circular 212
Conclusion
The evolution of Section 15(3)(b) from three conditions to one is, in the broad direction of reform, a sound and overdue simplification. The original three-condition framework created compliance barriers to the recognition of commercially legitimate discounts, imposed a third-party dependency on suppliers seeking to reduce their tax liability, and generated a class of disputes that had no foundation in sound VAT policy. The legislative intervention — removing the pre-agreement condition and the invoice-linkage condition and anchoring the regime to the Section 34 credit note mechanism — brings India’s treatment of post-supply discounts into closer alignment with the global VAT standard, as exemplified by EU VAT Directive Article 90 and the UK VAT framework.
However, the reform is incomplete. A few interpretive uncertainties identified above — the definition vacuum and the retrospective exposure problem — represent significant residual risks for taxpayers and cannot be resolved through statutory interpretation alone. They require statutory or administrative action: a definitional provision addressing what constitutes a ‘discount’ in the post-amendment era and a curative circular addressing the legacy of Circular 212’s operation.
More broadly, the trajectory of Section 15(3)(b)’s reform illustrates a recurring pattern in India’s GST administration: structural problems that are visible at the time of enactment are addressed not through proactive statutory drafting but through reactive circular-making, followed eventually by legislative correction. Circular 212 was a symptom of this pattern — an administrative patch applied to a statutory design flaw, itself generating further legal challenge, judicial scrutiny, and ultimately its own withdrawal. A GST framework that aspires to be litigation-neutral must invest in statutory precision at the drafting stage rather than rely on circulars to carry structural weight that the statute cannot bear.
Author Bio
Very insightful and well explained aksh