Three Weeks Ago the GST Council Only Recommended This. From Tomorrow, It’s Law.

Three weeks ago, when the 57th GST Council recommended a bundle of GST 2.0 changes, Finoscape flagged several of them — this one included — with the same caveat: "amendments will still need to be enacted." Readers who filed that away as a someday-maybe change should update their files. From tomorrow, it is law.

Sourcing note: Finoscape could not independently retrieve the clean notification text from cbic-gst.gov.in within this research cycle. Notification 03/2026’s substance (the Section 15/34/54 amendments) is corroborated by two independent professional sources — TaxGuru and A2Z Taxcorp — plus CA Club India on the notification number and S.O. reference. The companion Notification 05/2026’s Rule 14B and registration-amendment detail rests on two further independent sources, both of which flag their own numbering anomalies in the gazette text; treat that specific detail as provisional pending a direct gazette check, while the Section 15/34/54 package below rests on firmer ground.

By Notification No. 03/2026-Central Tax (S.O. 5791(E), dated 26 October 2026), CBIC has appointed 1 November 2026 as the date on which Sections 153, 154 and 155 of the Finance Act, 2026 come into force, amending the CGST Act as follows: Section 15(3)(b) is substituted so that a post-supply discount is excluded from GST’s taxable value wherever the supplier issues a credit note under Section 34 and the recipient reverses the ITC attributable to that discount — the earlier conditions, that the discount be pre-agreed at or before the time of supply and linked to specific invoices, are both removed. Section 34(1) is amended to expressly recognise such a discount as a valid, independent ground for issuing a credit note. Section 54(6)’s 90% provisional-refund mechanism, previously available only for zero-rated-supply (export) refund claims, is extended to eligible claims arising from an inverted duty structure. And Section 54(14)’s ₹1,000 minimum-refund-amount threshold is removed specifically for refunds of tax paid on exported goods.

A companion notification issued the same day, Notification No. 05/2026-Central Tax (G.S.R. 919(E)) — the CGST (Amendment) Rules, 2026 — inserts a new Rule 14B letting a registered person use a Section 52 e-commerce operator’s warehouse in another State as a declared principal place of business for supplies made through that platform, subject to the operator’s consent, a ₹2.5-lakh-per-month output-tax cap on non-same-PAN registered-recipient supplies, and Aadhaar/physical-verification requirements run from the person’s home-State registration. It also substitutes Rules 19 and 20 governing registration amendment and voluntary cancellation. Most of this takes effect 1 November 2026 alongside Notification 03/2026, but the suspension/cancellation machinery in Rules 21A, 22 and 23A, and a cluster of linked forms, is deferred to 1 April 2027, with intermediate sub-dates of 1 December 2026 (Rule 19(3), amended Rule 89 refund-document requirements, Forms REG-16/RFD-01) and 1 January 2027 (Forms GSTR-7A, INV-01).

Why It Matters

GST law has, for years, forced businesses to pre-negotiate and document every post-sale discount scheme in advance to keep it out of taxable value — a condition that routinely tripped up ordinary commercial discounting such as volume rebates decided after the fact, negotiated settlements, or scheme top-ups. That condition is gone from tomorrow; a credit note plus the recipient’s ITC reversal is now enough. The refund changes are narrower but real cash-flow relief: inverted-duty-structure claimants — common in textiles, fertilisers, solar, and several manufacturing chains with an inverted rate structure — get the same 90%-upfront treatment exporters have had, and very small export refund claims no longer get stuck below a ₹1,000 floor. The gap between the Council’s 8 October recommendation and this 26 October notification is itself worth noting for client conversations: eighteen days from recommendation to gazette notification for this slice of the package, while the arrest-power and penalty-reduction items from the same meeting remain unnotified three weeks on — a “GST Council has decided” headline is not the same claim as “CBIC has notified,” and the lag between the two is neither fixed nor predictable from one reform item to the next.

Key Takeaways

• Amended Section 15(3)(b): a post-sale discount is excluded from taxable value with only a Section 34 credit note and the recipient’s ITC reversal — the old “pre-agreed at or before supply” condition is removed.
• Amended Section 34(1): expressly recognises this kind of discount as valid grounds for a credit note.
• Amended Section 54(6): the 90% provisional-refund mechanism now also covers inverted-duty-structure claims, not just exports.
• Amended Section 54(14): the ₹1,000 minimum-refund threshold is removed for tax-paid export refunds.
• New CGST Rule 14B (companion Notification 05/2026): a conditional route to register from an e-commerce operator’s warehouse in another State without a full physical presence there — detail still provisional pending a direct gazette check.
• All of the above is effective 1 November 2026, except the Rule 14B suspension/cancellation machinery, deferred in stages to 1 December 2026, 1 January 2027 and 1 April 2027.

Practical Implications

Any business running post-sale discount schemes — which is close to universal across FMCG, pharma, auto-components and distribution trade — can simplify its discount documentation from 1 November: the commercial agreement no longer has to be dated before the supply to survive a GST audit, as long as a credit note is issued and the recipient reverses the matching ITC. Businesses already sitting on inverted-duty-structure refund claims should flag the 90% provisional-refund route to their GST consultant immediately, since it changes the cash-flow calculus on filing a claim versus waiting. Exporters with small-value tax-paid refund claims that were previously not worth filing below the ₹1,000 floor should revisit those now.

Action Checklist

• Review existing post-sale discount schemes and confirm the credit-note-plus-ITC-reversal mechanism is in place for any scheme currently relying on a pre-agreed-discount clause.
• For clients with inverted-duty-structure refund claims, evaluate filing now to access the 90% provisional refund under amended Section 54(6).
• Revisit any previously-shelved small export refund claims that fell below the old ₹1,000 threshold under Section 54(14).
• Do not rely on new CGST Rule 14B for a multi-State e-commerce registration strategy without first confirming its exact text against the primary gazette notification, given the sourcing caveat above.
• Watch for a CBIC clarificatory circular on the Section 15(3)(b) transition for discount schemes already documented under the old pre-agreement condition, straddling 1 November.

Relevant Sections, Rules & Notifications

CGST Act, 2017 — Section 15(3)(b) (as substituted), Section 34(1) (as amended), Section 54(6) and Section 54(14) · Finance Act, 2026 — Sections 153, 154 and 155 · CGST Rules, 2017 — new Rule 14B, substituted Rules 19 and 20, Rules 21A/22/23A (deferred) · Notification No. 03/2026-Central Tax, S.O. 5791(E), dated 26 October 2026 · Notification No. 05/2026-Central Tax, G.S.R. 919(E), dated 26 October 2026 (CGST Amendment Rules, 2026) · 57th GST Council Meeting recommendations, 8 October 2026.

FAQs

Does a post-sale discount still need to be agreed before the supply happens?
No — from 1 November 2026, amended Section 15(3)(b) removes that condition. A credit note under Section 34 plus the recipient’s reversal of the related ITC is now sufficient to keep the discount out of taxable value.

Does the 90% provisional refund now apply to every inverted-duty-structure claim?
It applies to eligible claims arising from an inverted duty structure, on the same basis the 90% mechanism already applied to zero-rated (export) refund claims under Section 54(6) — the specific eligibility conditions should be checked against the notified text for each claim.

Is the new Rule 14B e-commerce registration route safe to rely on today?
Treat it as provisional. Two independent secondary sources used for this article both flag numbering anomalies in the gazette text they relied on; confirm the exact Rule 14B conditions against cbic-gst.gov.in or the e-Gazette before using it for a live registration decision.

This article is for general informational purposes only and does not constitute legal or professional advice. Notification No. 03/2026-Central Tax’s substance rests on corroborating secondary sources rather than a directly-retrieved primary text, and the companion Notification No. 05/2026’s Rule 14B/19-23A detail is explicitly flagged as provisional; readers should confirm the exact text against cbic-gst.gov.in or the e-Gazette before relying on either for an active filing or registration decision. Prepared by Finoscape Editorial Team — hello@finoscape.com.