Direct Answer: Under Section 16(4) of the CGST Act, a registered taxpayer cannot claim Input Tax Credit (ITC) on any invoice or debit note pertaining to a financial year after the 30th day of November following the end of that financial year, or the date of furnishing the relevant Annual Return (GSTR-9), whichever is earlier. For example, for invoices dated between 1st April 2025 and 31st March 2026 (FY 2025-26), the final deadline to claim unclaimed credit is in the monthly GSTR-3B filed for October 2026 (due on 20th November 2026). Any legitimate tax credit unavailed past this date lapses permanently and must be written off to your profit and loss statement as an irrecoverable business cost.
This page is one part of our GSTR-2B reconciliation guide, which shows how the whole process fits together.
Section 16(4) is the most financially lethal trap in the Goods and Services Tax regime. Every year, Indian businesses lose crores of rupees in valid tax credits simply because a vendor delayed filing their GSTR-1, an invoice was filed in the wrong month, or an internal purchase register was not reconciled against historical GSTR-2B records before the November cutoff.
This comprehensive guide details the exact statutory timeline, analyzes the landmark retrospective relaxations introduced via Sections 16(5) and 16(6), and presents a battle-tested annual reconciliation checklist to catch every unclaimed rupee.
The Statutory Framework: What Section 16(4) Mandates
The operative text of Section 16(4) of the Central Goods and Services Tax Act reads:
“Section 16(4): A registered person shall not be entitled to take input tax credit in respect of any invoice or debit note for supply of goods or services or both after the thirtieth day of November following the end of financial year to which such invoice or debit note pertains, or furnishing of the relevant annual return, whichever is earlier.”
CGST Act, 2017 (as amended by Finance Act, 2022)
Note on the Historical Evolution: Prior to the Finance Act, 2022 amendment, the cutoff date was the due date of furnishing the return for the month of September (typically 20th October). The legislature extended this window to 30th November, giving taxpayers an additional 40 days to finalize supplier follow-ups and annual clean-up.
Key Deadlines by Financial Year
To avoid missing statutory windows, track the exact cutoff schedule below:
| Invoice Financial Year | Invoice Date Range | Statutory Cutoff Date | Effective Return to Claim ITC | Annual Return (GSTR-9) Impact |
|---|---|---|---|---|
| FY 2024-25 | 01-Apr-2024 to 31-Mar-2025 | 30th November 2025 | GSTR-3B of October 2025 (filed by 20-Nov-2025) | If GSTR-9 was filed on 15-Oct-2025, cutoff shifted to 15-Oct-2025! |
| FY 2025-26 | 01-Apr-2025 to 31-Mar-2026 | 30th November 2026 | GSTR-3B of October 2026 (filed by 20-Nov-2026) | Cannot claim in November return filed in December. |
| FY 2026-27 | 01-Apr-2026 to 31-Mar-2027 | 30th November 2027 | GSTR-3B of October 2027 (filed by 20-Nov-2027) | Ensure annual 12-month reconciliation is run in September. |
The "Whichever is Earlier" Trap: If your company files its Annual Return (Form GSTR-9) on the 25th of October, your Section 16(4) window closes on the 25th of October, NOT the 30th of November. Never file your Annual Return until you have performed a complete 365-day purchase reconciliation and claimed all pending prior-year credits in your October GSTR-3B.
Recent Amnesty & Legislative Relief: Sections 16(5) and 16(6)
In a historic move, the Finance (No. 2) Act, 2024 introduced retrospective amendments under Sections 16(5) and 16(6) of the CGST Act to grant massive relief against Section 16(4) demands for initial GST years:
| Statutory Section | Target Periods | Statutory Relaxation Provided | Legal Effect on Demand Notices |
|---|---|---|---|
| Section 16(5) (Retrospective) | FY 2017-18, 2018-19, 2019-20, and 2020-21 | ITC can be availed in any GSTR-3B filed up to 30th November 2021. | Nullifies pending DRC-01 demand notices where ITC was disallowed merely for missing the original due date. |
| Section 16(6) (Retrospective) | Revocation of Cancelled GST Registrations | Permits ITC claims where registration was cancelled and subsequently restored. | Protects credit claimed in returns filed within 30 days of registration revocation orders. |
Caution: While Sections 16(5) and 16(6) solved historic disputes from 2017 to 2021, they do NOT provide rolling relief for ongoing financial years. For FY 2024-25 and FY 2025-26, the strict 30th November cutoff remains absolute with zero administrative tolerance.
Worked Example: The ₹8.5 Lakh November Write-Off
Consider a chemical packaging firm in Hyderabad with ₹12 Crore annual turnover:
- Inward Invoice: Machine spare parts invoice dated 18th February 2025 (FY 2024-25).
- Invoice Value: ₹47,20,000 | 18% IGST: ₹8,49,600.
- What Happened: The supplier forgot to file their GSTR-1 until August 2025. When the supplier finally filed on 10th August 2025, the invoice appeared in the buyer's August 2025 GSTR-2B.
- The Oversight: The buyer's accounting team did not reconcile historical bills and missed claiming the ₹8.5L in their August, September, or October 2025 GSTR-3B.
- The Consequence: On 22nd December 2025, while preparing the annual balance sheet, the CA noticed the unavailed credit. Because the 30th November cutoff had passed, the ₹8,49,600 Input Tax Credit was statutorily barred.
- Financial Impact: The entire ₹8.5 Lakhs had to be charged as an expense to the P&L, destroying net operating profit.
Step-by-Step SOP: Catching Prior-Year ITC Before the Cutoff
Execute this 4-step reconciliation audit between 1st September and 20th October every year:
Step 1: Download All 12 Months of Prior FY GSTR-2B
Log in to the GST Portal and download the monthly GSTR-2B Excel statements from April through March of the prior financial year, plus the months of April through September of the current financial year (where vendors may have belatedly uploaded prior FY bills).
Step 2: Run a Consolidated Full-Year Reconciliation
Do not attempt this in a basic spreadsheet with manual lookups. Aggregate your full financial year purchase register from Tally, Busy, or Zoho Books and run it against the consolidated GSTR-2B pool using gstr2bmatch.in.
Step 3: Isolate Prior-Year Unmatched Records
Filter your results by:
- Invoices in Books but Missing in 2B: Immediately issue legal follow-ups to vendors. Demand that they file an amendment in GSTR-1A or their October GSTR-1 before 11th October so the bill reflects in your October GSTR-2B (generated on 14th November).
- Invoices in 2B but Unclaimed in Books: Verify whether goods were received. If valid, claim the credit immediately in Table 4(A)(5) of your October GSTR-3B.
Step 4: Audit IMS Pending Prior-Period Invoices
Open the Invoice Management System (IMS) on the GST Portal. Inspect the "Pending" tab for any invoices bearing dates from the previous financial year. You must Accept them and click "Recompute GSTR-2B" before filing your October GSTR-3B. An invoice left in IMS Pending past 30th November will be barred from ever entering GSTR-2B.
Audit Prior-Year Invoices in 2 Minutes Locally
Don't risk losing lakhs of rupees to the Section 16(4) cutoff. Drop your annual purchase ledger and GSTR-2B files into our in-browser engine to instantly identify all unavailed prior-year tax credits without exposing your ledger data to the cloud.
Scan ITCC →Frequently Asked Questions
Does the 30th November deadline mean I can claim ITC in the November GSTR-3B?
NO. This is a very common and dangerous misconception. The GSTR-3B for the month of November is filed on or after 20th December, well after the 30th November deadline has passed. To claim prior-year ITC, the credit must be availed in the October GSTR-3B (which is filed on or before 20th November).
What happens if a supplier files their GSTR-1 after 30th November for an earlier FY invoice?
Even if the supplier pays tax and files their return, you as the recipient are statutorily barred from claiming that ITC under Section 16(4). You cannot avail the credit in GSTR-3B. In such cases, commercial recourse (such as debiting the supplier's account or deducting the lost tax amount from pending payments) is your only recovery option.
Can we claim time-barred ITC through the Annual Return (GSTR-9)?
No. Form GSTR-9 is an informational consolidation return; you cannot avail fresh or previously unclaimed Input Tax Credit in GSTR-9. Any credit not claimed through monthly GSTR-3B returns before the Section 16(4) cutoff is lost permanently.
Related guides
- GSTR-2B reconciliation guide: the complete guide to ITC matching
- ITC conditions before claiming: what an invoice must satisfy before you claim its ITC
- GSTR-2B and 3B reconciliation: how GSTR-2B decides the ITC you can claim in GSTR-3B