Input Tax Credit (ITC) is one of the most valuable aspects of GST — but it comes with strict conditions. From FY 2022-23, ITC can only be claimed to the extent it appears in GSTR-2B (the auto-populated ITC statement). Any unclaimed ITC represents a real cost to your business. A systematic monthly reconciliation between your purchase records and GSTR-2B is no longer optional — it is essential.

What is GSTR-2B?

GSTR-2B is a static, auto-drafted Input Tax Credit statement generated for each GST registrant on the 14th of every month. It reflects the ITC available based on documents uploaded by your suppliers in their GSTR-1 / GSTR-1A / IFF during the period. Unlike the earlier GSTR-2A (which was dynamic and kept updating), GSTR-2B is fixed for a given tax period.

From January 2022, Section 16(2)(aa) restricts ITC to amounts reflected in GSTR-2B — making monthly reconciliation a statutory requirement.

Step-by-Step Reconciliation Process

1. Download GSTR-2B from the GST portal for the relevant month (available from 14th of the following month).
2. Export your purchase register (from Tally / Zoho Books / QuickBooks) for the same period in Excel.
3. Match on GSTIN + Invoice Number + Invoice Date + Amount. Use Excel VLOOKUP/XLOOKUP or the GST portal's reconciliation tool.
4. Identify mismatches:
   • In purchase register but not in GSTR-2B → supplier has not filed / filed incorrectly.
   • In GSTR-2B but not in purchase register → invoices not yet recorded in your books.
   • Amount mismatches → invoice value or tax amount differs between your record and supplier's filing.
5. Follow up with suppliers where ITC is missing in GSTR-2B — request them to amend or file their GSTR-1.
6. Claim ITC in GSTR-3B only for invoices confirmed in GSTR-2B, subject to eligibility conditions.

Common ITC Mismatch Reasons

• Supplier filed GSTR-1 late — ITC will appear in next month's GSTR-2B.
• Supplier reported wrong GSTIN of recipient — credit goes to wrong taxpayer.
• Invoice date reported incorrectly by supplier — appears in a different period's GSTR-2B.
• Supplier is a composition dealer or unregistered — ITC is not available on such purchases.
• Invoices under reverse charge mechanism — buyer self-generates liability; ITC available in the same period.

Deadline for ITC Claims

Under Section 16(4), ITC on invoices for a financial year must be claimed by the earlier of:

• 30th November of the year following the financial year (i.e., 30th November 2025 for FY 2024-25), or
• The date of filing the annual return (GSTR-9) for that year.

ITC not claimed within this period is permanently lapsed. Monthly reconciliation ensures you do not miss eligible credits.