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Total ITC in GSTR-2B is higher than the GST recorded in the purchase register, and the accountant does not know which extra credit is safe to claim.
Extra entries in GSTR-2B come from unbooked invoices, invoices booked in another month, duplicates, invoices raised on the wrong GSTIN, and personal or non-business purchases.
List every GSTR-2B invoice with no match in the register, then tag each one by cause using invoice date, invoice number, supplier history and purchase approval.
Each extra GSTR-2B invoice is booked, rejected in IMS, or left unclaimed, and only eligible credit is carried to GSTR-3B.
GSTR-2B shows more input tax credit (ITC) than your purchase register when it contains invoices you have not booked, booked in a different month, recorded twice, or that are not really yours. Unlike the opposite gap, this one is usually on your side, and you can fix most of it without waiting for suppliers.
What are the likely causes?
| Cause | How to spot it | Who fixes it | Claim the ITC? |
|---|---|---|---|
| Invoice not yet booked | Supplier and invoice are real; no entry in the register | You | Yes, once booked and goods received |
| Booked in another month | Invoice date in this month, book date next month | You | Yes, in the month it appears in GSTR-2B |
| Duplicate entry | Same GSTIN and value, invoice number repeated or slightly different | Supplier | Only once |
| Raised on your GSTIN by mistake | Supplier you have never bought from | Supplier | No |
| Personal or non-business purchase | Owner’s personal item billed to the business | You | No, blocked under Section 17(5) |
Can I claim ITC on an invoice that is in GSTR-2B but not in my books?
Appearing in GSTR-2B is necessary but not enough. Section 16(2) of the CGST Act, 2017, also requires that you hold the tax invoice, have received the goods or services, and that the supplier has paid the tax. So:
- Find the invoice and confirm the purchase happened.
- Check that the goods or services were received.
- Book it in the purchase register.
- Then claim the credit in GSTR-3B.
If you cannot find the purchase at all, do not claim.
Worked example
For September, GSTR-2B shows ITC of ₹9,48,000. The purchase register shows ₹8,76,000. The gap is ₹72,000.
| Item | GST amount | Action |
|---|---|---|
| Two packing-material invoices received but not yet booked | ₹40,000 | Book and claim |
| One freight invoice reported twice by the supplier | ₹18,000 | Claim once; ask supplier to delete the copy |
| Invoice from a supplier with a similar name, not yours | ₹14,000 | Reject in IMS; do not claim |
| Total explained | ₹72,000 |
Check: ₹40,000 + ₹18,000 + ₹14,000 = ₹72,000, and ₹8,76,000 + ₹72,000 = ₹9,48,000. After booking the two invoices, the register shows ₹9,16,000. The correct claim is ₹9,16,000, which is ₹32,000 less than GSTR-2B. That ₹32,000 is the credit you must not take.
Claiming it would mean ITC wrongly availed. If such credit is used, interest under Section 50(3) runs at 18 percent a year, and the ₹32,000 would have to be reversed.
What do I do with invoices that are not mine?
Since October 2024, the Invoice Management System (IMS) lets you reject an invoice before GSTR-2B is finalised. A rejected invoice drops out of your ITC. If GSTR-2B is already generated, reject it and recompute. Then write to the supplier and ask them to amend their GSTR-1 so the invoice moves to the correct buyer. Keep the email as evidence.
What to read next
- Next in this series: Why won’t my invoices match between the purchase register and GSTR-2B?
- The opposite gap: Why is my GSTR-2B less than my purchase register?
- The monthly workflow: GSTR-2B vs purchase register reconciliation
- Matching at volume: GST reconciliation software
Inward GST matching (GSTR-2A, GSTR-2B, ITC and IMS) is on the TransactIG roadmap.
Content authored by practitioners with experience at Amazon India, Intuit QuickBooks, and the Tata Group. Meet the team →