Summary: November 2026 is a crucial month for registered taxpayers seeking to avail unclaimed input tax credit (ITC) relating to FY 2025-26. Under Section 16(4) of the CGST Act, 2017, the statutory time limit for availing eligible ITC is 30 November 2026 or the date of furnishing the relevant annual return, whichever is earlier. Taxpayers must ensure compliance with the conditions prescribed under Section 16(2), including possession of valid tax invoices or debit notes, receipt of goods or services, communication of eligible invoice details, filing of the prescribed return and satisfaction of applicable payment conditions. A comprehensive reconciliation of purchase records with the Invoice Management System (IMS) and GSTR-2B is particularly important to identify invoices appearing in the books but missing from GST records, as well as invoices reported by suppliers but absent from the recipient’s accounts. The October 2026 GSTR-1 filing cycle assumes special significance because suppliers can report outstanding invoices relating to FY 2025-26 before the relevant statutory cut-off. Taxpayers should communicate discrepancies to suppliers promptly and examine the availability of Form GSTR-1A where invoices have been omitted from the original GSTR-1. However, the timing of GSTR-1A reporting and its reflection in the recipient’s GSTR-2B must be carefully considered. Missing invoices, incorrect reporting, pending supplier action and unsupported ITC claims can result in permanent loss of eligible credit or subsequent disputes. Businesses should complete reconciliation, obtain missing invoices, follow up with suppliers and review their GSTR-3B filings without delaying action until the final days of November.
CAUTION : LAST MONTH TO AVAIL GST INPUT TAX CREDIT OF FY 2025-2026.
Your books say you have ITC. Your GSTR-2B may disagree. With 30 November 2026 around the corner, here is how to sort it out.
- Eligibility to Claim ITC :
- Time Limit to Avail ITC of Previous Financial Year:
- Things to do in order to Avail unclaimed ITC:
- Why 11th November of following Financial year is as important as 20th November/ 30th November?
- What to do if the due date of GSTR1 is passed and supplier failed to report the tax invoices:
- Invoices not reflecting in taxpayer's books:
Eligibility to Claim ITC :
As per Section 16(2) of the CGST am Act, 2017, A registered person should comply with following conditions to avail input tax credit:
- Possession of documents: You must hold a valid tax invoice or debit note issued by a registered supplier.
- Receipt of goods or services: The goods or services must have been received.
- Tax paid to Government: The supplier must have paid the charged tax to the government.
- Return filing: The details must reflect in your auto-drafted Form GSTR-2B and you must file your Form GSTR-3B.
- Payment to supplier: You must pay the supplier the value of the supply plus tax within 180 days from the invoice date (otherwise, the ITC must be reversed with interest).
Time Limit to Avail ITC of Previous Financial Year:
As per Section 16(4) of the CGST Act, 2017, the time limit to avail ITC of previous year (in our case FY 2025-26) is earlier of following:
30 November of the following financial year, i.e. 30 November 2026 for FY 2025-26,
OR
Date of filing of Annual Return (GSTR 9/9C).
Since ITC is availed through GSTR-3B, the October 2026 GSTR-3B (due 20 November) is the last return that can safely carry FY 2025-26 credits.
Things to do in order to Avail unclaimed ITC:
The most important exercise the registered taxpayer should perform is reconciling the ITC as per books with the ITC reflecting in the Invoice Management System (IMS) or GSTR-2B. While considering IMS/GSTR-2B, the taxpayer should consider the report up to October 2026, so that if a supplier has reported certain supplies pertaining to the previous year in the current year, the same can be taken into account. Since the October GSTR-2B is generated only around mid-November, do this exercise now and repeat it once the October GSTR-2B is available.
With the help of such reconciliation, the taxpayer will be left with two types of differences:
- Invoices reflecting in taxpayer’s books but not in IMS / GSTR2B.
- Invoices reflecting in IMS / GSTR2B and not in taxpayer’s books
Let’s discuss the above reconciling items individually in detail.
Why 11th November of following Financial year is as important as 20th November/ 30th November?
As per Section 16(2) of the CGST Act, 2017, one of the key conditions to avail ITC is that the details must be reflected in the taxpayer’s GSTR-2B. For that, the supplier must report the invoices in their GSTR-1.
While reconciling the ITC as per books vs. the ITC as per IMS/GSTR-2B, the taxpayer may identify certain invoices which are in their books but not in IMS/GSTR-2B. The supplier can report such sales of the previous year up to the filing of the October 2026 GSTR-1, i.e. 11 November (13 November for QRMP suppliers using IFF for B2B invoices).
Why is this so important? An invoice reported only in the November GSTR-1 (due 11 December) will appear in the November GSTR-2B, which is after the 30 November cut-off. So the October GSTR-1 is the real deadline for your supplier.
What to do if the due date of GSTR1 is passed and supplier failed to report the tax invoices:
If the supplier fails to report the invoices in their GSTR-1, the taxpayer will not be able to claim the ITC and it will lapse.
In that case, there is a useful facility, GSTR-1A, i.e. an amendment to GSTR-1. The supplier can file GSTR-1A after filing GSTR-1 but before filing GSTR-3B for the month. Thus, if the supplier missed reporting certain invoices in GSTR-1, they can still report them in GSTR-1A. This should be done quickly, as a late amendment may not reach your October GSTR-2B in time.
Invoices not reflecting in taxpayer’s books:
As per Section 16(2) of the CGST Act, 2017, another key condition to avail ITC is that the taxpayer should possess the legal documents. If the taxpayer has received the goods/services but does not have a valid tax invoice for the same, the taxpayer will not be able to claim the ITC. In that case, the taxpayer should ask the supplier to share the tax invoice so as to be eligible to claim the ITC.
Where the supplier has inadvertently reported an invoice which does not pertain to the taxpayer, the taxpayer can reject the said invoice on the IMS portal.
To sum up: ITC you don’t claim by 30 November is money you can’t get back. Reconcile today, not on the 19th.
How are you handling your ITC reconciliation this month? Share your tips below
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Disclaimer: This article is for general information only and is not professional advice. Please check the current law and the GST portal before acting.
