GSTR-2B reconciliation and ITC mismatches
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Updated 03 Oct 2026
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AI summary
Match purchases with GSTR-2B, fix mismatches and handle suppliers who don't file.
4 sections 3 steps
Monthly process
- Download GSTR-2B (available on the 14th) or view it in GSTR-2B Reco.
- Match with your purchase register by supplier GSTIN + invoice number + date + taxable value + tax.
- Sort into four buckets:
| Bucket | Action |
|---|---|
| Matched | Claim ITC |
| In books, not in 2B | Don't claim yet. Ask the supplier to upload in GSTR-1/IFF. Claim in the month it appears. |
| In 2B, not in books | Check if you received it. If yes, book it. If not yours, reject it in IMS. |
| Value/rate/GSTIN mismatch | Ask the supplier to amend, or claim only the lower matched amount |
Invoice Management System (IMS)
Accept, reject or keep pending each supplier invoice on the portal before GSTR-2B is generated. Rejected invoices don't flow into your 2B.
Supplier filing problems
- Supplier not filing GSTR-1: invoice missing in 2B → no ITC. Follow up in writing; hold payment.
- Supplier filed GSTR-1 but not GSTR-3B: ITC must be reversed under Rule 37A if not filed by 30 September.
- Cancelled supplier GSTIN: invoices after cancellation don't give ITC.
Mismatch notices
If ITC claimed in GSTR-3B exceeds GSTR-2B beyond the limit, you get DRC-01C. Reply with reasons or reverse the excess.
Sources
- Reporting of ITC availed, reversed and ineligible in GSTR-3B Table 4
PreviousRule 86A: blocking of the electronic credit ledger Next in Input Tax Credit Got an ITC mismatch notice? How to respond to DRC-01C and ASMT-10
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