GSTR-2B Reconciliation Explained in Simple Steps

GSTR-2B reconciliation means comparing your purchase bills with the GSTR-2B statement on the GST portal, every month, before you claim input tax credit (ITC) in GSTR-3B. You do this because, under Rule 36(4), you generally can't claim ITC on an invoice unless your supplier has reported it and it appears in your GSTR-2B.

Reconciliation answers one question: can I claim this credit this month, and if not, why not?

This is general information. Your CA should make the final call on what you claim.

What is GSTR-2B?

GSTR-2B is an auto-generated monthly statement of the input tax credit available to you, based on what your suppliers have filed. See Rule 60 for the legal details. It's static, meaning that the statement for a month doesn't change as suppliers file late, though the Invoice Management System (below) allows it to be recomputed before you file GSTR-3B.

According to the portal's IMS advisory, the draft becomes available around the 14th of the following month.

Why this matters: since 1 January 2022, you can no longer claim a provisional amount for invoices missing from GSTR-2B. This is why the monthly match became so important.

GSTR-2A vs GSTR-2B

How the Invoice Management System (IMS) fits in

IMS lets you act on invoices your suppliers report before they flow into your GSTR-2B. According to the portal's advisory:

You can change your action until you file GSTR-3B, then recompute GSTR-2B. The Pending option doesn't apply to every document, so check the current list. Since "do nothing" counts as acceptance, don't ignore IMS, even if you aren't required to act on every line.

Rules here are changing. The GST Council's 57th meeting on 8 October 2026 recommended further changes linking IMS and ITC, proposed from the April 2027 return and subject to consultation. Ask your CA for the current position.

How to reconcile GSTR-2B: the monthly process

Step 1: Close your purchase records

Enter every purchase bill for the month, with the correct supplier GSTIN, bill number, date, taxable value and tax.

Step 2: Download GSTR-2B

Download the statement from the GST portal.

Step 3: Match line by line

Match on supplier GSTIN and invoice number first, then compare amounts. A small tolerance for rounding is normal, but don't ignore real differences.

Step 4: Sort everything into four groups

Step 5: Follow up with suppliers

Send your suppliers a short list every month. Most issues are simple: a wrong GSTIN, a late filing, or a wrong invoice number.

Sample message:

Hello, your invoice ST-1042 dated 12 Oct for ₹18,000 tax isn't showing in our GSTR-2B. Could you check whether it was filed in GSTR-1 under our GSTIN? Thank you.

Step 6: Act in IMS, then file GSTR-3B

Accept, reject or keep lines pending as advised by your CA, then file based on the final reconciled figures. Keep a record of what you claimed and why.

Other rules that can reverse your ITC

Appearing in GSTR-2B doesn't settle everything. Section 16 has other conditions. Two common ones:

The 180-day rule. If you don't pay your supplier within 180 days of the invoice date, the Section 16(2) proviso and Rule 37 require you to reverse the credit proportionately, with interest, in GSTR-3B. You can claim it back when you pay.

Supplier not filing GSTR-3B. Rule 37A applies if your supplier reported the invoice but hasn't filed GSTR-3B by 30 September following the financial year. You reverse the credit by 30 November, and can claim it again once the supplier files.

Mistakes to avoid

• Claiming from your purchase register without checking GSTR-2B
• Leaving reconciliation until year-end, when suppliers are harder to reach
• Ignoring IMS, since inaction means acceptance
• Not recording supplier invoice numbers exactly
• Mixing up GSTIN across branches
• Not tracking unpaid bills against the 180-day limit

How KhataBhai helps

GSTR-2B Reconciliation in KhataBhai compares your GSTR-2B with your purchase bills:

1. Choose a period, then import the file from the GST portal as CSV or Excel and map its columns.
2. KhataBhai matches on supplier GSTIN and supplier invoice number, with a ₹2 tolerance on amounts. Credit notes are matched with purchase returns, and reverse charge entries are excluded.
3. Each line is marked Matched, Amount mismatch, Missing in books or Missing in 2B.
4. After you fix a record, press Re-run Match.

KhataBhai doesn't file returns or act in IMS for you, so you and your CA still make those decisions on the portal.

See GST tools in KhataBhai. For businesses that also sell online, a store order from your Online Store reaches your books as a normal invoice once you accept it. Our GST invoice format guide covers the sales side.

Frequently asked questions

When is GSTR-2B available?

Around the 14th of the following month, according to the portal's IMS advisory.

Can I claim ITC if an invoice isn't in GSTR-2B?

Generally no, under Rule 36(4) and Section 16(2)(aa). Follow up with your supplier and claim it once it appears, within the time limits. Ask your CA about your specific case.

What if my supplier filed late?

The invoice usually appears in a later GSTR-2B. Keep it in your follow-up list and claim it in the right month.

Is acting in IMS mandatory?

The portal's advisory treats no action as acceptance, and says intervention is only needed to reject or keep a document pending. Check the current position with your CA, as this area is changing.