GSTR-2B is a statement the GST portal prepares for you each month. It lists every invoice, debit note and credit note your suppliers have reported against your GSTIN, and works out the input tax credit available on them. Since 2022, the credit you claim in GSTR-3B must come from GSTR-2B, so matching your purchase register to it has become a monthly task.
01When GSTR-2B is ready
| You file | GSTR-2B for the period is generated |
|---|---|
| Monthly | 14th of the following month |
| Quarterly under QRMP | After the quarter, for the whole quarter, with monthly statements also available |
It covers documents suppliers filed in GSTR-1, GSTR-1A or IFF between the cut-off dates for the period, and also imports from bills of entry and credit from an Input Service Distributor.
A supplier who files GSTR-1 late does not lose you the credit. The invoice appears in the next GSTR-2B and you claim it then.
02The Invoice Management System
Since October 2024, every supplier document passes through the Invoice Management System (IMS) on the portal before it reaches GSTR-2B. For each record you can:
| Action | Effect on your credit |
|---|---|
| Accept | Credit flows into GSTR-2B |
| Reject | Credit is left out, and the supplier sees the rejection |
| Pending | Held back, to be decided in a later period |
| No action | Treated as accepted |
From the October 2025 tax period, the portal added three changes, as of October 2026:
- Some credit notes and downward amendments can be kept pending for one tax period, after which they are treated as accepted.
- When you accept a credit note, you can say whether credit needs to be reduced and by how much, for cases where you never claimed full credit on the original invoice.
- You can record a remark when you reject or keep a record pending.
03Why the numbers differ
Your books and GSTR-2B rarely match line by line. The usual reasons are:
- Timing. The supplier invoiced on 30 September and filed it in October's GSTR-1.
- Supplier has not filed. The bill is real, but the supplier missed GSTR-1.
- Wrong GSTIN. The supplier reported the invoice against another GSTIN, often a sister concern.
- Typing errors. Invoice number, date or amount entered differently in your books.
- Bills you should not have. Invoices for goods you never received, or a bill raised twice.
- Ineligible credit. The invoice is in GSTR-2B, but the purchase is blocked under section 17(5).
04A matching routine
A Coimbatore textile machinery parts maker receives around 300 purchase bills a month from 80 suppliers. Its accounts team runs this routine between the 14th and the 18th:
- Download GSTR-2B as a spreadsheet from the portal.
- Export the purchase register for the same period, with supplier GSTIN, invoice number, date, taxable value and tax.
- Match on GSTIN and invoice number. Clean the invoice number first: remove spaces, slashes and leading zeros on both sides.
- Sort the result into four lists. Matched, in books but not in GSTR-2B, in GSTR-2B but not in books, and matched with a different amount.
- Act on each list.
- In books, not in GSTR-2B: hold the credit and send the supplier a list by email or WhatsApp. - In GSTR-2B, not in books: find the bill. If it is not yours, reject it in IMS. - Different amount: check the bill and ask for a credit or debit note.
- Recompute GSTR-2B if you changed any IMS action, then file GSTR-3B with Table 4 matching it.
| List this month | Bills | GST |
|---|---|---|
| Matched | 271 | ₹8,42,300 |
| In books, not in GSTR-2B | 18 | ₹46,800 |
| In GSTR-2B, not in books | 6 | ₹12,150 |
| Amount differs | 5 | ₹3,900 difference |
The firm claims ₹8,42,300 plus whatever it confirms from the last two lists. The ₹46,800 waits until suppliers report the bills.
05Supplier follow-up that works
The bills that never reach GSTR-2B usually belong to a few suppliers. Keeping a short list of them, and reminding them before the 11th, saves more credit than any amount of checking after the fact. Some firms hold payment of the GST portion until the invoice appears in GSTR-2B, and say so in their purchase terms.
06Rule 37A: when the supplier does not pay
If a supplier reports an invoice in GSTR-1 but does not file GSTR-3B for that period by 30 September of the next financial year, you must reverse the credit claimed on it by 30 November. When the supplier later files, you can claim it again.
07Keeping the differences under control
Carry unmatched bills forward on the same sheet each month, with a column for the month they finally appear. By September, any bill from the previous financial year still missing needs a decision, because credit for that year must be claimed by 30 November. Bills that never appear are a cost, and the supplier's account should reflect it.
08For larger firms
A company with many GSTINs downloads GSTR-2B for each one, because credit belongs to the GSTIN on the invoice. Suppliers billing the wrong branch is the most common cause of missing credit in multi-state businesses.
09When a supplier will not respond
If a supplier repeatedly fails to report invoices, the credit is lost to you each month. Many firms move such suppliers to cash-against-GSTR-2B terms, or replace them. The decision is commercial, but the numbers from the matching sheet make it easy to argue.
This guide is general information as of October 2026 and does not amount to tax advice.
In MatruOS, each supplier bill is matched to its purchase order and goods received, so the purchase register you check against GSTR-2B starts clean.