This is the mirror image of an invoice that is in your books but not in GSTR-2B. There, the question is why the supplier’s return does not show your invoice. Here the supplier’s return shows an invoice and your records do not. In our tool this is bucket D, “In GSTR-2B, not in books”, tagged “Add to register”. It is not part of the “ITC at risk” total, which counts only buckets C and E, because nothing is blocked here. Something has to be decided instead: book it, correct something, or send it back.
How an invoice lands in this list
The tool matches on supplier GSTIN plus invoice number, after cleaning the number. For books rows that find no match, it tries a probable match: the same GSTIN, tax within ₹1, and an invoice number that differs by at most two characters (why invoice numbers fail to match). A 2B invoice that no books row claims is listed as only in GSTR-2B. An amended record from the B2BA table is held under both its new and its original number, so it is not listed here if your books carry either number. Credit and debit notes are not part of this list; they appear in a separate informational list.
Step 1: rule out a false positive
- Search your register by supplier name and amount, not by number. If you find it, the number or the GSTIN in your books is wrong, and the same invoice will also sit in the “missing from GSTR-2B” or “likely IMS Pending” list.
- Search other months. The invoice may be booked in a different month from the one in which the supplier reported it.
- Search expense and fixed-asset vouchers. A purchase booked outside the purchase register will not be in the file you loaded.
If all three come back empty, you have a genuine only-in-2B invoice. The next step is to find out why.
Step 2: identify the cause
| Cause | How to tell | What to do | Claim this month? |
|---|---|---|---|
| 1. A real purchase you have not booked | You received the goods or services, but the invoice never reached accounts | Get the invoice copy, book it, then match again | Yes, once you hold the invoice and the goods are received |
| 2. Booked under a wrong GSTIN, number or month | Same supplier name and amount found elsewhere in your register | Correct the register from the invoice copy | Yes, it is already in 2B |
| 3. Not your invoice | No order, no delivery; the supplier has used your GSTIN for another buyer’s supply | Do not book it. Reject it in IMS and ask the supplier to correct it | No |
| 4. Goods or services not yet received | The invoice came early; the goods are in transit or arrive in lots | Keep it Pending in IMS until the receipt is complete | Not yet |
| 5. Reported twice by the supplier | Two 2B rows for one supply, with different numbers and the same amount and date | Claim once, and ask the supplier to correct the extra row; see duplicate invoices | Once only |
| 6. Booked outside the purchase register | The invoice is in an expense, fixed-asset or journal voucher | Check whether the credit is blocked before you claim; see blocked credit under Section 17(5) | Depends on the item |
For a reverse-charge invoice, check how RCM invoices appear in GSTR-2B before you decide.
Step 3: act in IMS and in your books
The Invoice Management System (IMS) lets the recipient accept, reject or keep Pending each inward invoice. Pending records do not become part of GSTR-2B or GSTR-3B, and a recipient can change an action and recompute GSTR-2B at the time of filing GSTR-3B (GSTN IMS FAQ). The GSTN FAQ of October 2025 also lets the recipient add a remark when taking a Reject or Pending action, so use it to say why.
- Genuine and received: book it, Accept it, and recompute GSTR-2B if you had changed an action.
- Not yours: Reject it with a remark, and write to the supplier. A supplier whose GSTR-3B for the period is still pending can correct current-period records through GSTR-1A; later, the correction goes through an amendment (amended invoices and GSTR-1A).
- Not yet received: keep it Pending, note the expected receipt date, and look at it again before the 20th. For some record types the Pending option is disabled after a specified period and the record is then treated as deemed accepted. We have not verified how long that period is, so check the current advisory before you rely on Pending.
The IMS choice in detail is in the Accept, Reject or Pending decision tree.
Do not let it flow into GSTR-3B unreviewed. GSTN’s GSTR-3B guide says Table 4(A)(5), All other ITC, is auto-populated from the system-generated GSTR-2B, and that the auto-populated values are editable. A 2B invoice that is not yours can therefore sit in your draft return until you act on it in IMS and recompute.
The ITC treatment, from the rules
Being in GSTR-2B is necessary for the credit. It is not enough. The conditions we have verified are these:
- The supplier’s details must be furnished and communicated to you in GSTR-2B (Section 16(2)(aa); Rule 36(4) from 1 January 2022).
- You must hold a tax invoice or debit note issued by a registered supplier (Section 16(2)(a)).
- You must have received the goods or services (Section 16(2)(b)). Where goods arrive in lots, credit may be taken on receipt of the last lot (first proviso to Section 16(2)).
- The tax must actually have been paid to the Government (Section 16(2)(c)), which you cannot see from the statement alone, and you must have furnished your return under section 39 (Section 16(2)(d)).
None of these conditions says “recorded in your books”. Our advice, not a legal rule, is to book the invoice before you claim it, because a claim you cannot trace to a voucher is hard to defend.
Two clocks matter when you book late. The time limit in Section 16(4) is the 30th of November following the end of the financial year to which the invoice pertains, or the date of filing the annual return, whichever is earlier (the Section 16(4) time limit). And the 180-day payment rule runs from the invoice date, not from the day you booked it: if you have not paid the supplier within 180 days of the invoice, the ITC availed has to be paid back with interest and can be availed again on payment (Section 16(2), second and third provisos; Rule 37).
Worked example: five invoices only in GSTR-2B
A trading firm’s September 2026 reconciliation shows ITC of ₹2,90,000 on invoices that matched. Five more invoices, with ITC of ₹82,800, are only in GSTR-2B. (Figures are a single-head illustration.)
| # | Invoice | ITC | Cause found | Action | Claim this month |
|---|---|---|---|---|---|
| 1 | Supplier P, INV 3382 | ₹18,000 | Real purchase, invoice never reached accounts | Get copy, book, match | ₹18,000 |
| 2 | Supplier Q, QX/118 | ₹9,900 | Booked under a wrong GSTIN | Correct GSTIN in register | ₹9,900 |
| 3 | Supplier R, R-4410 | ₹27,000 | Not ours: our GSTIN used for another buyer | Reject in IMS with remark, write to supplier | ₹0 |
| 4 | Supplier S, S/0925 | ₹12,600 | Booked in the August register; reported by the supplier in September | Match against the right month | ₹12,600 |
| 5 | Supplier T, T-771 | ₹15,300 | Goods arriving in lots; last lot not received | Keep Pending in IMS | ₹0 |
| Total | ₹82,800 | ₹40,500 |
Check: ₹18,000 + ₹9,900 + ₹27,000 + ₹12,600 + ₹15,300 = ₹82,800. Claimable now: ₹18,000 + ₹9,900 + ₹12,600 = ₹40,500. Not claimable now: ₹27,000 + ₹15,300 = ₹42,300. And ₹40,500 + ₹42,300 = ₹82,800.
The effect on GSTR-3B: if the whole statement flowed into the draft, ITC would read ₹2,90,000 + ₹82,800 = ₹3,72,800. After the work above it should read ₹2,90,000 + ₹40,500 = ₹3,30,500. The difference, ₹42,300, is the invoice that is not the firm’s and the invoice whose goods have not all arrived. Invoice 4 matters for a different reason: it was not in August’s statement, so it should not have been claimed in August, and it can be claimed now that it appears in September’s.
Where the tool stops. It lists the invoices that are only in GSTR-2B, with their taxable value and tax. It cannot tell you whether you received the goods or whether the invoice is yours. Those two questions are the whole decision, and they are yours.
For the other direction of the same exercise, see invoices in books but not in GSTR-2B. For the full list of reconciliation errors, start from common GSTR-2B reconciliation errors and fixes.
Related guides
- GSTR-2B reconciliation: complete guide to ITC matching
- GSTR-2B Table 4D mismatch: unmatched invoices and fixes
- How accountants can automate GSTR-2B reconciliation
- GSTR-2B not generated or not showing: what to check and what to do
- GSTR-2B rejected invoices fix: how to resolve portal errors
Frequently asked questions
What does an invoice in GSTR-2B but not in my books mean?
A supplier has reported an invoice against your GSTIN, and your purchase register has no matching entry. It may be a purchase you have not booked, an entry with a wrong GSTIN or number, or an invoice that is not yours.
Can I claim ITC on an invoice that is in GSTR-2B but not in my books?
Being in GSTR-2B is necessary but not enough. You also need to hold the invoice and to have received the goods or services. Book it first and claim only when those conditions are met.
What should I do with a GSTR-2B invoice that is not mine?
Do not book it. Reject it in IMS with a remark and ask the supplier to correct their GSTR-1 record. Keep the written request on file.
Does the tool show invoices that are in GSTR-2B but not in my books?
Yes. They appear in bucket D, In GSTR-2B, not in books, and in the Only in 2B sheet of the Excel export. The ITC at risk total counts only buckets C and E, so bucket D is not part of it.
Will an unbooked 2B invoice flow into my GSTR-3B?
GSTN says Table 4(A)(5) of GSTR-3B is auto-populated from GSTR-2B and that the values are editable. Pending records do not become part of GSTR-2B or GSTR-3B, so review every unbooked record in IMS before you file.
Is there a time limit to book and claim a late invoice?
Yes. Section 16(4) allows no ITC after the 30th of November following the end of the financial year of the invoice, or the filing of the annual return, whichever is earlier. The 180-day payment rule also runs from the invoice date.
See the invoices that are only in GSTR-2B
Add your GSTR-2B and purchase register and the tool lists every invoice that is only in GSTR-2B (bucket D) next to the other four buckets, with the Only in 2B sheet in the Excel export. It cannot say whether you received the goods or whether the invoice is yours. Your GSTR-2B and purchase register files are read in your browser and never uploaded to any server.
Last checked: 1 Oct 2026. Sources: Notification 39/2021-Central Tax (Section 16(2)(aa)), Notification 40/2021-Central Tax (Rule 36(4)), CBIC Circular 237/31/2024-GST (Section 16(4)), Section 16, CGST Act, Notification 19/2022-Central Tax (Rule 37), GSTN FAQs on IMS, GSTN FAQ, October 2025 (IMS remarks and Pending options), GSTN GSTR-1A FAQ, GSTN GSTR-3B user guide, GSTN FAQ on GSTR-2B tables.