Two returns sit at the heart of every input tax credit claim — GSTR-2B, the auto-drafted statement of credit available to you, and GSTR-3B, the summary return where you declare your tax and claim that credit. They are meant to agree, and when they don't, mismatches surface as notices. Here's how the two relate and how to reconcile them.
Reviewed by CA Harika Chebolu, FCA · Last updated 2026-06-15
Quick answer
GSTR-2B tells you what credit the system thinks you can claim; GSTR-3B is where you actually claim it. Reconciling the two is how you avoid notices.
GSTR-2B is a static, auto-drafted statement generated for each tax period from what your suppliers have reported. It lists the input tax credit considered available to you, separating it into credit you can claim and credit that is ineligible or blocked. Because it is static, it does not keep changing after it is generated for a period — it gives you a fixed reference point against which to check your own purchase records. Treat it as the system's view of your eligible credit, not as your own books.
GSTR-3B is the summary return in which you declare your output tax, claim your input tax credit, and pay the net tax due. The credit you claim here is meant to be supported by your GSTR-2B and your underlying invoices. GSTR-3B is self-assessed, so the responsibility for claiming the right amount sits with you — overstating credit invites recovery with interest, while understating it leaves money on the table. The figures you enter should trace back to documents you can produce if asked.
The credit appearing in GSTR-2B and the credit claimed in GSTR-3B should align. When your 3B claim exceeds what 2B supports, the department can question the difference; when it is lower, you may be foregoing credit you are entitled to. Reconciliation is the process of matching your purchase register, your 2B and your 3B claim line by line, so that what you claim is both eligible and substantiated. Doing this every period — rather than at year-end — keeps small mismatches from compounding.
Mismatches rarely mean fraud — they usually have ordinary explanations. A supplier may have filed late, reported under the wrong GSTIN, entered the wrong invoice number, or missed the invoice altogether. Timing differences also arise when you record a purchase in one period but the supplier reports it in another. Identifying the cause matters, because the fix differs: some require following up with the supplier, others are simply timing gaps that resolve in a later period.
The practical routine is to download your 2B each period, compare it against your purchase register, and only then finalise the credit you claim in 3B. Flag invoices that appear in your books but not in 2B and chase those suppliers; hold back credit that you cannot yet substantiate. Keep a record of how each mismatch was resolved. This discipline both protects your credit and gives you a clean trail if a notice ever arrives — and it keeps interest exposure down, since tax found to be short-paid attracts interest at 18% per annum.
GSTR-2B is an auto-drafted, static statement of the input tax credit available to you based on supplier filings, while GSTR-3B is the summary return where you actually declare tax and claim that credit. One is the system's view of your eligible credit; the other is your self-assessed claim.
Usually because of ordinary issues — a supplier filed late, used the wrong GSTIN or invoice number, missed the invoice, or reported it in a different period. Identify the cause first, because supplier follow-up and timing gaps need different fixes.
The department can question the excess and seek recovery, and short-paid tax attracts interest at 18% per annum. That is why you should reconcile your purchase register against 2B before finalising the credit you claim.
Struggling to reconcile your GSTR-2B with your 3B claims? Write to the firm and we'll match your credit period by period and keep your ITC clean and defensible.