Rule 37A ITC Reversal: How to Handle Supplier Non-Filing Before 30 November 2026

If your supplier reported an invoice in GSTR-1 but has not filed the matching GSTR-3B, the Input Tax Credit you availed on that invoice may have to be reversed under Rule 37A of the CGST Rules, 2017 (inserted by Notification No. 26/2022–Central Tax, 26 December 2022). For ITC availed during FY 2025-26: if the supplier has not filed the GSTR-3B for the corresponding tax period by 30 September 2026, you must reverse that ITC in a GSTR-3B you furnish on or before 30 November 2026 (Rule 37A).

What Is Rule 37A?

Rule 37A applies where a registered person has availed ITC in GSTR-3B on an invoice or debit note that the supplier furnished in GSTR-1 (as amended in GSTR-1A, if any) or through the invoice furnishing facility, but the supplier has not furnished GSTR-3B for the corresponding tax period by 30 September following the end of the financial year in which the ITC was availed. The recipient must then reverse that ITC in a GSTR-3B furnished on or before 30 November following the end of that financial year (Rule 37A, CGST Rules, 2017).

The Reversal Window for FY 2025-26

• Trigger date: 30 September 2026. The test is whether the supplier had furnished GSTR-3B for the relevant tax period by that date, for ITC you availed during FY 2025-26 (April 2025 to March 2026).
• Reversal deadline: The reversal must be made in a GSTR-3B furnished on or before 30 November 2026 (Rule 37A).
• Which return for monthly filers: Any GSTR-3B you furnish on or before 30 November 2026 qualifies. The September 2026 GSTR-3B (due 20 October 2026 under Rule 61(1)(i)) was filed after the 30 September trigger date, so a reversal made in it is valid. If you did not reverse in the September return, the October 2026 GSTR-3B, due 20 November 2026, is the remaining return in the window.

Note for QRMP quarterly filers: The GSTR-3B for the July–September 2026 quarter was due on 22 October 2026 or 24 October 2026, depending on the State of your principal place of business (Rule 61(1)(ii)). The October–December 2026 quarterly GSTR-3B falls due on 22 or 24 January 2027, after 30 November 2026. So the July–September 2026 return is the quarterly return that falls within the window. If you have not yet filed it, the reversal can still be made in it, provided you file it on or before 30 November 2026. The same date is also the outer limit for taking ITC on FY 2025-26 invoices under Section 16(4) of the CGST Act (30 November or the date you furnish the annual return, whichever is earlier). Consult a Chartered Accountant to assess your position.

Step-by-Step: Identifying and Reversing Affected ITC

Step 1 — List the ITC you availed in FY 2025-26, supplier by supplier. Include invoice numbers, supplier GSTINs, tax periods and the ITC amounts.

Step 2 — Verify supplier filing status. On the GST portal: Search Taxpayer → Filing Status. Enter the supplier GSTIN and check whether GSTR-3B was filed for the relevant tax period by 30 September 2026.

Step 3 — Identify the affected ITC. Total the ITC availed on invoices where the supplier had not filed GSTR-3B for the corresponding period by 30 September 2026.

Step 4 — Report the reversal in a GSTR-3B furnished on or before 30 November 2026. This reversal can be re-availed later if the supplier files (see below), so record it separately from permanent reversals.

Step 5 — Maintain your audit trail. Keep a list of invoice numbers, supplier GSTINs, tax amounts reversed, and the period for which the supplier has not filed.

DRC-01C: The Notice for an ITC Mismatch

Under Rule 88D of the CGST Rules, where the ITC you availed in GSTR-3B exceeds the ITC available in your GSTR-2B by more than the amount and percentage recommended by the GST Council, you are intimated of the difference in Part A of Form GST DRC-01C. You must then either pay the excess with interest under Section 50 through DRC-03, or explain the difference on the portal, within seven days (Rule 88D(1)). If you do neither, or the explanation is not accepted, the amount can be demanded under Section 73, 74 or 74A (Rule 88D(3)). Do not wait for a DRC-01C. Reversing in time under Rule 37A is the correct approach.

Interest Under Rule 88B: The Most Misunderstood Part

Rule 88B(3) of the CGST Rules (inserted by Notification No. 14/2022–Central Tax, 5 July 2022, with effect from 1 July 2017) sets out how interest under Section 50(3) of the CGST Act is calculated on ITC wrongly availed and utilised. Interest is computed on the amount wrongly availed and utilised, from the date of utilisation until the credit is reversed or the tax is paid.

Wrongly availed ITC counts as utilised only when the balance in your electronic credit ledger falls below the wrongly availed amount, and only to the extent of that shortfall (Rule 88B(3), Explanation (1)). If the full amount has stayed in the ledger throughout, nothing has been utilised, so no interest under Section 50(3) arises on it.

Illustrative Example: A manufacturer availed ITC of Rs 60,000 in June 2025 on invoices from a vendor who filed GSTR-1 but had not filed GSTR-3B by 30 September 2026. Its electronic credit ledger balance later fell to Rs 20,000, which is Rs 40,000 below the Rs 60,000 wrongly availed. Under Rule 88B(3), Rs 40,000 is treated as utilised, and any interest runs on Rs 40,000 from the date of utilisation (not from the date of availing) until reversal. The remaining Rs 20,000 was not utilised. The manufacturer reverses the full Rs 60,000 in a GSTR-3B furnished on or before 30 November 2026 and can re-avail it once the vendor files the GSTR-3B.

This is an illustrative example only. Actual interest depends on specific dates and facts.

Re-Availment When the Supplier Files

A Rule 37A reversal is not final. If the supplier later furnishes the GSTR-3B for that tax period, you may re-avail the credit in the GSTR-3B for a later tax period (second proviso to Rule 37A).

Frequently Asked Questions

Q1: My supplier filed the GSTR-3B in October 2026. Do I still need to reverse?
Yes. The test is whether the supplier had furnished the GSTR-3B by 30 September 2026. A filing after that date does not remove the reversal obligation, but it lets you re-avail the credit in a later GSTR-3B (second proviso to Rule 37A).

Q2: What if I do not reverse by 30 November 2026?
Under the first proviso to Rule 37A, the amount becomes payable along with interest under Section 50. A mismatch can also trigger a DRC-01C intimation under Rule 88D. Seek professional advice if you have missed, or may miss, the deadline.

Q3: Does Rule 37A apply to composition dealers?
A person paying tax under the composition scheme in Section 10 is not entitled to any input tax credit (Section 10(4), CGST Act). So there is nothing for them to reverse under Rule 37A as recipients.

---

This article is for educational purposes only and does not constitute legal or tax advice. For advice specific to your business situation, consult a qualified Chartered Accountant.

Related services:

• GST Compliance Services


• GST Advisory

Need help with this?

Our team handles the paperwork. You focus on your business.