The Ministry of Finance, Department of Revenue, through the Central Board of Indirect Taxes and Customs (CBIC), has issued Notification No. 03/2026–Central Tax dated October 26, 2026, vide S.O. 5791(E), notifying November 1, 2026, as the effective date for implementation of Sections 153 to 155 of the Finance Act, 2026 (No. 4 of 2026).
The notification has been issued in exercise of powers conferred under Section 1(2)(b) of the Finance Act, 2026, thereby giving statutory effect to significant amendments relating to valuation of taxable supplies, issuance of GST credit notes and refund of unutilised Input Tax Credit (ITC) under the Central Goods and Services Tax Act, 2017.
These amendments, initially proposed under Clauses 137 to 139 of the Finance Bill, 2026 as part of the Union Budget 2026–27, seek to address longstanding difficulties faced by businesses regarding post-sale discounts, accumulated ITC refunds and small-value export refund claims.
Major Relief in Post-Sale Discounts: Prior Agreement and Specific Invoice-Linking Requirements Removed
[I] Amendment to Section 15(3)(b) of the CGST Act, 2017 — Section 153 of the Finance Act, 2026
Effective Date: November 1, 2026
One of the significant amendments becoming effective from November 1, 2026 relates to the treatment of discounts offered by suppliers after the completion of supply of goods or services.
Under the earlier provisions of Section 15(3)(b) of the CGST Act, 2017, exclusion of post-supply discounts from the value of taxable supply was subject to prescribed conditions, including the requirement that such discounts should have been established under an agreement entered into at or before the time of supply and specifically linked to the relevant invoices. Further, the recipient was required to reverse the ITC attributable to such discounts.
These conditions frequently created practical difficulties for manufacturers, distributors, dealers, wholesalers and other businesses offering turnover-based incentives, performance-linked rebates, sales-target discounts and other post-sale commercial incentives.
With the substitution of Section 15(3)(b) by Section 153 of the Finance Act, 2026, the statutory requirement of a pre-existing agreement and specific invoice-linking for determining the eligibility of post-supply discounts under the said provision has been dispensed with.
Under the amended provision, a post-supply discount can be excluded from the value of taxable supply where the supplier has issued a credit note for such discount and the recipient has reversed the ITC attributable to the discount in accordance with Section 34 of the CGST Act.
Accordingly, the revised provisions provide greater flexibility in structuring post-supply discounts while continuing to safeguard revenue through the corresponding reversal of ITC by the recipient.
The amendment is expected to simplify compliance for industries where volume rebates, annual turnover incentives, target-based discounts and other commercial adjustments form an integral part of normal business arrangements.
However, the relaxation does not dispense with the requirement of proper credit-note documentation, applicable reporting obligations or verification of ITC reversal.
GST Credit Notes Expressly Permitted for Post-Supply Discounts
[II] Amendment to Section 34(1) of the CGST Act, 2017 — Section 154 of the Finance Act, 2026
Effective Date: November 1, 2026
To complement the amendment to Section 15(3)(b), the Government has also amended Section 34(1) of the CGST Act, 2017, relating to issuance of credit notes.
Prior to this amendment, Section 34(1) expressly provided for issuance of credit notes in situations such as excess taxable value or tax charged in an invoice, return of goods, or deficiency in the goods or services supplied.
The amended provision now expressly includes cases where a discount referred to in Section 15(3)(b) is provided after the supply.
Consequently, registered suppliers will have an express statutory basis to issue GST credit notes in respect of qualifying post-supply discounts, subject to the conditions prescribed under the CGST Act and Rules.
This amendment is intended to harmonise the provisions governing valuation of taxable supply and credit notes, thereby reducing interpretational disputes over the treatment of post-sale commercial discounts.
Importantly, the supplier’s ability to reduce taxable value and corresponding output tax liability remains subject to compliance with the applicable conditions, including issuance and reporting of the relevant credit note and reversal of attributable ITC by the recipient.
The amendment is particularly relevant for sectors involving extensive distribution networks and periodic commercial incentive arrangements, including automobiles, FMCG, consumer durables, pharmaceuticals, electronics and other manufacturing and trading businesses.
It is also important to distinguish a GST credit note used to adjust taxable value from a financial or commercial credit note that does not result in a GST tax adjustment. The amended provisions do not automatically authorise reduction of output tax liability merely because a commercial discount has been recorded in the books of account.
Major Working Capital Relief: 90% Provisional Refund Facility Extended to Inverted Duty Structure
[III] Amendment to Section 54(6) of the CGST Act, 2017 — Section 155(a) of the Finance Act, 2026
Effective Date: November 1, 2026
In another significant reform, the Government has amended Section 54(6) of the CGST Act, 2017 to extend the existing provisional refund mechanism to claims arising from an Inverted Duty Structure (IDS).
An Inverted Duty Structure generally arises where the tax rate on inputs is higher than the tax rate on outward supplies, resulting in accumulation of unutilised Input Tax Credit.
Prior to the statutory amendment, Section 54(6) principally provided for provisional sanction of 90% of the refund amount claimed in respect of zero-rated supplies, subject to the prescribed conditions.
With the amendment coming into force from November 1, 2026, the statutory provision for provisional refunds will also cover eligible refund claims of unutilised ITC under Section 54(3), arising from an Inverted Duty Structure.
Accordingly, eligible registered persons claiming refunds on account of IDS can benefit from provisional sanction of 90% of the claimed refund amount, subject to applicable conditions, limitations, safeguards and risk-based verification, followed by final settlement of the claim after due scrutiny.
The amendment provides statutory support for the provisional refund mechanism for IDS claims, which had earlier been addressed administratively through CBIC Instruction No. 06/2025-GST dated October 3, 2025, pending legislative changes.
The existing framework under Rule 91 of the CGST Rules contemplates the issuance of a provisional refund order within seven days from the date of acknowledgement, subject to its prescribed conditions and safeguards. Actual sanction and disbursement continue to depend upon statutory eligibility, procedural compliance and the applicable refund-processing mechanism.
The reform is expected to provide substantial relief to manufacturers and businesses experiencing accumulation of ITC because of differences between the GST rates applicable to their inputs and outward supplies.
This assumes particular significance in the context of GST rate rationalisation, which may create or deepen inverted duty situations in certain industries.
By enabling faster release of a substantial portion of eligible refund claims, the measure is expected to ease working capital pressures, reduce the blockage of funds and facilitate business operations, particularly for MSMEs and manufacturing enterprises.
It is pertinent to clarify that the amendment to Section 54(6) extends the provisional refund mechanism to existing eligible IDS refund claims. It does not, by itself, expand the categories of input tax credit eligible for refund under Section 54(3).
Relief for Small Exporters: ₹1,000 Minimum Refund Threshold Removed for Goods Exported with Payment of Tax
[IV] Amendment to Section 54(14) of the CGST Act, 2017 — Section 155(b) of the Finance Act, 2026
Effective Date: November 1, 2026
The Government has also introduced an important relaxation for exporters by amending Section 54(14) of the CGST Act, 2017.
Under the earlier provisions, refund claims falling within the ambit of Section 54(5) or Section 54(6) were subject to a minimum refund threshold of ₹1,000.
With effect from November 1, 2026, this minimum threshold will no longer apply to cases where refund of tax is claimed on account of goods exported out of India with payment of tax.
Consequently, eligible exporters of goods who have paid IGST on exports can seek refund even where the admissible refund amount is less than ₹1,000, subject to the applicable statutory and procedural requirements.
The amendment is expected to benefit micro and small exporters, courier and postal exporters, and businesses undertaking low-value cross-border e-commerce transactions, where individual export refund claims may involve comparatively small amounts.
Removal of the minimum threshold will help ensure that otherwise eligible small-value export refund claims are not denied merely because they fall below ₹1,000.
This relief is specifically confined to the category identified in the amendment, namely goods exported out of India with payment of tax. It should not be construed as a general abolition of the ₹1,000 minimum threshold for all categories of GST refund claims.
Implementation of Union Budget 2026–27 GST Proposals
The amendments notified through Notification No. 03/2026–Central Tax represent the implementation of important GST proposals announced in the Union Budget 2026–27 and subsequently incorporated in the Finance Act, 2026.
The reforms are broadly directed towards rationalising conditions for post-supply discounts, providing greater statutory clarity for issuance of credit notes, extending provisional refunds to eligible IDS claims and facilitating refunds for small exporters.
The measures also follow the broader objectives of the GST Council’s recommendations to simplify tax administration, reduce procedural difficulties and improve the ease of doing business.
The notification dated October 26, 2026 specifically operationalises Sections 153, 154 and 155 of the Finance Act, 2026. It does not, by itself, bring into force other Budget proposals or subsequent GST Council recommendations requiring separate legislative, rule-based or administrative implementation.
Implications for Businesses, Manufacturers, Dealers and Exporters
The amendments are expected to have a favourable impact across the manufacturing, trading and export sectors.
Manufacturers, distributors and dealers may benefit from greater flexibility in designing post-sale discounts and incentive schemes without the earlier statutory requirement of establishing such discounts through pre-supply agreements and specifically linking them with relevant invoices for the purposes of Section 15(3)(b).
Businesses issuing GST credit notes will, however, need to ensure proper documentation, corresponding ITC reversal by recipients and adherence to applicable statutory timelines for reporting and adjustment of tax liability.
Manufacturers affected by Inverted Duty Structure may benefit from improved liquidity through provisional refunds of eligible accumulated ITC, subject to applicable refund procedures and safeguards.
Exporters of goods on payment of IGST, particularly smaller exporters with low-value refund claims, are expected to benefit from removal of the minimum ₹1,000 refund restriction.
Businesses should review their discount policies, credit-note procedures, ITC reconciliation mechanisms and refund documentation in preparation for implementation from November 1, 2026.
Effective Date and Legal Position
Notification No. 03/2026–Central Tax dated October 26, 2026 appoints November 1, 2026 as the commencement date for Sections 153 to 155 of the Finance Act, 2026.
The notification is a commencement notification and does not independently prescribe new procedures for credit-note reporting, refund processing or ITC verification. Those matters continue to be governed by the relevant provisions of the CGST Act, CGST Rules and applicable notifications and instructions.
The notification also does not expressly provide retrospective effect to these amendments. The treatment of transactions or refund claims pertaining to earlier periods should therefore be examined with reference to the applicable statutory provisions, dates and transitional circumstances.
Conclusion
The implementation of these GST amendments from November 1, 2026 marks an important step towards simplifying the GST compliance framework and facilitating trade.
By removing rigid statutory conditions for post-sale discounts, expressly recognising corresponding GST credit notes, extending provisional refunds to Inverted Duty Structure claims and permitting small-value refunds for goods exported with payment of tax, the amendments seek to address practical concerns faced by taxpayers across multiple sectors.
The reforms are expected to reduce compliance difficulties, improve working capital availability and support a more predictable and business-friendly GST environment.
The Notification can be accessed at: https://a2ztaxcorp.net/wp-content/uploads/2026/02/Seeks-to-bring-in-force-amendment-to-CGST-Act-made-by-Finance-Act-2026.pdf
