GST Amendments 2026 introduce important changes effective from 1 November 2026 that businesses, suppliers, recipients and exporters should understand. These changes relate to post-supply discounts, GST credit notes and certain refund provisions under the Central Goods and Services Tax (CGST) Act, 2017.
The amendments have been brought into force through Notification No. 03/2026–Central Tax dated 26 October 2026, covering Sections 153 to 155 of the Finance Act, 2026.
Understanding these changes is important for businesses to maintain accurate GST records, manage input tax credit (ITC), issue appropriate credit notes and review refund eligibility. This guide explains the key GST amendments, their practical implications and the compliance steps businesses should consider.
Quick Answer: GST Amendments from November 2026
From 1 November 2026, three important changes take effect:
- Post-Supply Discounts: The requirements for a prior agreement and linking the discount to specific invoices are removed from the amended Section 15(3)(b). A supplier must issue a credit note, and the recipient must reverse the input tax credit attributable to the discount, in accordance with Section 34.
- Provisional GST Refunds: The provisional refund framework under Section 54(6) is extended to eligible refunds of unutilised input tax credit arising from an inverted duty structure.
- Export Refunds: The minimum refund threshold under Section 54(14) no longer applies to refund claims for goods exported outside India with payment of tax.
The changes take effect on 1 November 2026. Businesses should review the amended provisions and applicable procedural requirements before making adjustments to their GST returns or refund claims.
What Are the GST Amendments Effective from 1 November 2026?
GST amendments are changes to the existing legal provisions governing the levy, valuation, reporting and refund of goods and services tax.
The latest changes arise from Sections 153, 154 and 155 of the Finance Act, 2026, which amend Sections 15, 34 and 54 of the CGST Act, 2017.
These amendments address three practical areas: the treatment of discounts granted after a supply, the issuance of credit notes for those discounts, and the processing of certain GST refund claims.
For businesses, these changes are particularly relevant where commercial arrangements involve post-sale discounts, customers have claimed input tax credit, or accumulated ITC and export-related refunds need to be reviewed.
1. New GST Rules for Post-Supply Discounts
One of the important changes concerns discounts granted after goods or services have already been supplied.
Under the earlier provisions, a post-supply discount generally had to satisfy conditions including an agreement entered into before or at the time of supply, a specific link to the relevant invoices, and reversal of the attributable ITC by the recipient.
From 1 November 2026, the amended Section 15(3)(b) provides a revised framework. A qualifying post-supply discount may be excluded from the taxable value where the supplier issues a credit note and the recipient reverses the ITC attributable to the discount in accordance with Section 34.
What Has Changed?
The requirement for a prior agreement and specific invoice linkage has been removed from the amended provision. However, the credit-note and ITC-reversal requirements remain important.
This change may help businesses that offer commercial incentives, volume-based discounts or other eligible discounts after a transaction has taken place.
Example of a Post-Supply Discount
Suppose a supplier sells goods to a registered business and subsequently offers a discount based on the customer’s purchase volume.
Under the amended framework, the supplier may be able to issue a GST credit note for the qualifying discount. The recipient must reverse the ITC attributable to that discount in accordance with the applicable provisions.
The supplier should maintain the supporting commercial records, credit note and relevant tax documentation.
Important: A commercial discount does not automatically qualify for a reduction in taxable value. The applicable statutory requirements must be satisfied.
2. Changes to GST Credit Note Rules
The second amendment concerns Section 34(1) of the CGST Act, 2017.
Credit notes are used in specified circumstances, including when the taxable value or tax charged in an invoice exceeds the amount payable, goods are returned, or a supply is found to be deficient.
From 1 November 2026, the amended provision expressly includes cases where a discount covered by Section 15(3)(b) is given after the supply.
What Should Businesses Review?
Businesses should review their credit-note procedures to ensure that:
- Credit notes are issued for eligible post-supply discounts.
- The relevant discount and underlying transaction are properly documented.
- The recipient’s corresponding ITC reversal is addressed.
- Credit notes are reported within the applicable statutory timelines.
- Accounting records and GST returns are reconciled.
These checks can help suppliers and recipients maintain consistent tax records and reduce avoidable discrepancies.
Why Are Credit Notes Important?
A credit note can affect the supplier’s taxable value and output tax liability when the applicable legal conditions are satisfied. It may also affect the recipient’s ITC position.
Therefore, both parties should coordinate their documentation and accounting treatment instead of treating a commercial credit note as an ordinary adjustment without considering its GST implications.
3. Changes to Provisional GST Refunds
The third amendment relates to Section 54(6) of the CGST Act, 2017.
An inverted duty structure can arise when the GST rate on inputs is higher than the GST rate applicable to the outward supply. In eligible cases, this can result in accumulated input tax credit that may qualify for a refund under the relevant provisions.
From 1 November 2026, the amendment extends the provisional refund framework to eligible refunds of unutilised ITC covered by the specified inverted duty structure provisions.
How Can This Affect Businesses?
Eligible businesses may benefit from improved access to provisional refunds, which can help ease working-capital pressure.
Businesses should nevertheless distinguish between provisional refund processing and final eligibility. A provisional refund is not an automatic entitlement for every taxpayer with accumulated ITC.
What Should Businesses Do?
- Review whether their refund claim falls within the applicable inverted duty structure provisions.
- Reconcile ITC with purchase records and GST returns.
- Maintain invoices and supporting documents.
- Check the applicable refund application requirements and current GST portal procedure.
- Review any applicable restrictions, exclusions or verification requirements.
The amendment changes the statutory framework, but businesses should confirm the current procedural requirements before filing a refund claim.
4. Removal of the Minimum Refund Threshold for Certain Exports
The amendment to Section 54(14) introduces an exception to the minimum refund restriction for refund claims relating to goods exported outside India with payment of tax.
Previously, Section 54(14) generally restricted refunds below ₹1,000, subject to the statutory provisions. From 1 November 2026, the amended provision excludes cases where a refund of tax is claimed on account of goods exported outside India with payment of tax from that minimum threshold restriction.
What Does This Mean for Exporters?
Exporters of goods who pay IGST on exports should review how the change applies to their refund claims, including claims involving relatively small amounts.
However, removing the minimum threshold does not mean that every export-related refund will be automatically approved. Other applicable eligibility requirements, documentation and verification procedures continue to matter.
Export Compliance Checklist
Exporters should review:
- Export invoices and relevant shipping documentation.
- GST return details and tax-payment records.
- The reconciliation of export data with refund claims.
- The applicable refund application and supporting documents.
- Any remaining statutory conditions relevant to their transactions.
GST Amendments 2026: Summary of Key Changes
| GST provision | Change effective 1 November 2026 |
| Section 15(3)(b) | Revised conditions for excluding eligible post-supply discounts from taxable value |
| Section 34(1) | Express provision for credit notes relating to qualifying post-supply discounts |
| Section 54(6) | Provisional refund framework extended to specified inverted duty structure refunds |
| Section 54(14) | Minimum refund restriction no longer applies to the specified export-of-goods refund claims involving payment of tax |
These changes arise from Sections 153 to 155 of the Finance Act, 2026, brought into force by Notification No. 03/2026–Central Tax dated 26 October 2026.
Documents and Records Businesses Should Review
Businesses should maintain organized records to support their GST compliance and any adjustments made under the amended provisions.
Sales and Discount Records
- Sales invoices and relevant transaction details.
- Commercial discount policies and supporting correspondence.
- Credit notes and related accounting entries.
- Customer records and payment details, where relevant.
Input Tax Credit Records
- Purchase invoices and purchase registers.
- ITC claimed in GST returns.
- Records supporting the reversal of ITC attributable to discounts.
- Reconciliation statements and adjustment records.
Refund and Export Records
- Relevant GST returns and refund computations.
- Purchase and input tax credit records.
- Export invoices and shipping documentation, where applicable.
- Tax-payment records and supporting refund documents.
The exact documentation required depends on the nature of the transaction, the type of refund and the applicable GST rules.
How Businesses Can Prepare for the November 2026 GST Changes
Businesses should review their current accounting and compliance processes before implementing the changes.
Step 1: Review Discount Policies
Identify the discounts offered after the supply and determine which transactions may qualify under the amended provisions.
Step 2: Update Credit Note Procedures
Review the internal process for issuing and recording credit notes. Ensure that the relevant personnel understand the revised conditions.
Step 3: Coordinate With Customers and Suppliers
Where post-supply discounts affect ITC, establish a clear process for documenting the credit note and corresponding ITC reversal.
Step 4: Review Refund Eligibility
Businesses with accumulated ITC or export-related refund claims should assess whether the amendments affect their position.
Step 5: Reconcile GST Records
Compare invoices, credit notes, accounting records and GST returns to identify discrepancies that need to be resolved.
Step 6: Verify Applicable Procedures
Check the latest official notifications, GST rules and portal instructions before making tax adjustments or submitting refund applications.
Businesses should verify the latest notifications and filing procedures through the official GST portal before making tax adjustments or submitting refund applications.
Common GST Compliance Mistakes to Avoid
Even when businesses understand the amendments, poor documentation and inconsistent reporting can create compliance difficulties.
1. Issuing Credit Notes Without Reviewing GST Conditions
A commercial discount or credit note should not automatically be treated as a reduction in taxable value. Confirm that the applicable statutory conditions are met.
2. Ignoring ITC Reversal Requirements
Where a post-supply discount qualifies under the amended provision, the recipient must address the attributable ITC reversal in accordance with the law.
3. Failing to Reconcile GST Returns
Differences between accounting records, credit notes and GST returns should be investigated and documented.
4. Assuming Every Refund Is Eligible
The amendments do not remove all refund eligibility conditions. Businesses should check the specific provision and applicable requirements for their claim.
5. Relying on Outdated Compliance Procedures
Review internal checklists and accounting workflows to ensure they reflect the provisions applicable from 1 November 2026.
If your business needs assistance with GST-related compliance or tax advisory requirements in Patna, explore our Income Tax & GST Services in Patna page to learn more.
Frequently Asked Questions
1. When do the new GST amendments take effect in 2026?
The amendments covered by Sections 153 to 155 of the Finance Act, 2026, take effect on 1 November 2026 under Notification No. 03/2026–Central Tax dated 26 October 2026.
2. What is the main change to post-supply discounts?
The amended Section 15(3)(b) removes the earlier requirements for a prior agreement and specific invoice linkage. The supplier must issue a credit note, and the recipient must reverse the ITC attributable to the discount in accordance with Section 34.
3. Are GST credit note rules changing from November 2026?
Yes. Section 34(1) is amended to expressly cover credit notes issued where a qualifying post-supply discount is granted.
4. Do the new amendments affect GST refunds?
Yes. The changes extend the provisional refund framework to specified inverted duty structure refunds and remove the minimum refund restriction for the specified export-of-goods refund claims involving payment of tax. Other eligibility conditions continue to apply.
5. Does the new refund provision guarantee approval?
No. The amendments do not guarantee approval of every refund claim. Eligibility, documentation, verification and other applicable requirements must still be satisfied.
6. What should businesses do before 1 November 2026?
Businesses should review discount arrangements, credit-note procedures, ITC reconciliation, refund eligibility and their current compliance records. They should also verify the latest official rules and filing procedures.
7. Where can businesses get GST compliance guidance in Patna?
Businesses can consult a suitable tax and compliance professional to understand how the amended provisions apply to their transactions and documentation.
Conclusion
The GST amendments effective from 1 November 2026 introduce important changes to post-supply discounts, credit notes and certain refund provisions. Businesses should review their accounting processes, ensure appropriate ITC treatment and verify refund eligibility under the amended law.
Taking a proactive approach can help businesses maintain organized records, reduce avoidable compliance errors and prepare for the applicable GST requirements.
For businesses and professionals in Patna seeking assistance with tax and compliance matters, JDC Legal Firm offers legal, tax, compliance and business advisory services. Contact the firm to discuss your specific requirements.