Last updated: 11 June 2026. Before you file GSTR-3B for May 2026 on 20 June, reconcile the Input Tax Credit (ITC) you plan to claim against your GSTR-2B and your Invoice Management System (IMS) dashboard. If your GSTR-3B claim runs ahead of what GSTR-2B shows, the portal can issue an automatic intimation under Rule 88D in Form DRC-01C — and ignoring it blocks your next GSTR-1. This guide walks through what GSTR-2B is, how IMS now feeds it, the conditions your ITC has to clear, and a step-by-step reconciliation you can run every month.
Applicability Note: This guide reflects GST provisions, CBIC notifications, and GSTN advisories applicable as of 11 June 2026. ITC rules and portal behaviour change through notifications and system updates, and the GST portal is the authoritative source. No extension to the 20 June 2026 GSTR-3B deadline has been notified as of this writing. Always verify the current position on gst.gov.in or with a GST professional before filing.
Who Should Care?
This guide applies to:
- Regular taxpayers filing GSTR-3B monthly (turnover above ₹5 crore, or those who opted out of QRMP) for the May 2026 period due 20 June
- QRMP taxpayers, who reconcile the same way before claiming ITC in their quarterly GSTR-3B
- Accountants and business owners who claim ITC and want to avoid Rule 88D intimations and demand notices
- Anyone whose suppliers file late, whose GSTR-2B never quite matches the purchase register
1. What GSTR-2B Is — and Why It Decides Your ITC
GSTR-2B is your auto-drafted ITC statement. The portal generates it once a month, on the 14th, for the previous tax period — so the statement for May 2026 lands on 14 June 2026. It pulls together every invoice, debit note, and credit note your suppliers reported, plus the IGST your customs records show on imports, and tells you the credit you are eligible to claim for the month.
Two features make it the number that matters. First, it is static: once generated for a period it does not change, so the figure you reconciled on the 14th is the same figure available when you file. (Its older cousin, GSTR-2A, keeps updating as suppliers file late, which is why it was never a stable basis for claiming credit.) Second, under Section 16(2)(aa) of the CGST Act, credit is available only where your supplier has actually reported the invoice in their GSTR-1 or IFF and it has been communicated to you — in practice, only where it appears in your GSTR-2B. A genuine purchase with a valid tax invoice still does not qualify if the supplier never filed it.
This is the shift that catches people out. ITC is no longer "I have the invoice, so I can claim it." It is "the invoice is in my GSTR-2B, and I have met the other conditions." For the mechanics of how GSTR-3B sits alongside your outward-supply return, see our guide on GSTR-1 vs GSTR-3B.
2. How IMS Now Sits Between GSTR-1 and GSTR-2B
Since the October 2024 tax period, an extra layer decides what reaches your GSTR-2B: the Invoice Management System (IMS). When a supplier files an invoice in their GSTR-1, it appears on your IMS dashboard. You take one of three actions on each record:
| IMS action | What it does to your GSTR-2B / GSTR-3B |
|---|---|
| Accept | The record joins the "ITC Available" section of GSTR-2B and auto-populates as eligible ITC in GSTR-3B. |
| Reject | The record moves to "ITC Rejected" in GSTR-2B and does not flow into GSTR-3B. |
| Pending | The record stays off both GSTR-2B and GSTR-3B and sits on the IMS dashboard until you accept or reject it (within the Section 16(4) time limit). |
| No Action | Treated as deemed accepted when GSTR-2B is generated. |
The "No Action equals accepted" rule is the part worth circling. If a wrong or duplicate invoice lands on your dashboard and you do nothing, the system pulls it into your GSTR-2B as available credit. Acting on IMS is how you stop a supplier's error from quietly becoming your over-claim.
IMS has been live for well over a year, so treat it as standard practice rather than something new. From the October 2025 tax period, the portal added the ability to save remarks when you reject or mark a record pending, and remarks became mandatory for partial-reversal and no-reversal cases — a useful audit trail when you later explain a figure. One point that reassures people: as things stand, the ITC values auto-populated into GSTR-3B are still editable on the portal. The system does not yet hard-stop you at the exact GSTR-2B figure, but claiming above it is precisely what triggers the scrutiny in Section 5 below.
3. The Conditions Your ITC Must Clear Under Section 16
Reconciliation is not only matching numbers — every rupee of credit also has to satisfy Section 16(2). All of these must hold before you claim:
- You hold the tax invoice or debit note — Section 16(2)(a).
- The supplier reported it and it reached your GSTR-2B — Section 16(2)(aa).
- You have received the goods or services — Section 16(2)(b).
- The credit is not restricted under Section 38 — Section 16(2)(ba).
- The tax was actually paid to the government — Section 16(2)(c).
- You have filed your GSTR-3B — Section 16(2)(d).
Two more limits apply on top. If you do not pay your supplier within 180 days of the invoice date, the credit has to be reversed and reclaimed later when you pay (the second proviso to Section 16(2)). And under Section 16(4), ITC for a financial year can be claimed only up to 30 November of the following year or the filing of the annual return, whichever is earlier. Credit you forget to claim before that cut-off is lost. Remember the related Section 17(5) blocked credits too — items like personal-use goods and most motor vehicles fail regardless of what GSTR-2B shows.
4. How to Reconcile GSTR-2B Before You File: A Monthly Routine
Run this every month after the 14th, once GSTR-2B is out, and well before the 20th:
- Clear your IMS dashboard first. Go through pending records and accept genuine invoices, reject the wrong ones, and leave nothing important sitting in "No Action" by accident. GSTR-2B is generated from these decisions.
- Download GSTR-2B for the period and pull your purchase register for the same month.
- Match invoice by invoice on GSTIN, invoice number, date, taxable value, and tax. Most accounting tools do this; a spreadsheet works for smaller volumes.
- Sort the mismatches into three buckets:
- In your books but not in GSTR-2B — usually a supplier who has not filed yet. Do not claim this credit now; it appears in a later GSTR-2B once they file.
- In GSTR-2B but not in your books — a missed entry, or an invoice that is not yours. Record the genuine ones; reject the rest in IMS.
- In both but with different figures — chase the supplier to amend, and claim only what the documents support.
- Claim only eligible, matched credit in GSTR-3B Table 4. The auto-populated figure comes from GSTR-2B; adjust it only for genuine reversals (Section 17(5), 180-day, ineligible) and keep a working that ties your claim back to GSTR-2B.
- Keep the reconciliation. A saved month-by-month working is what you produce if the department ever asks how your claim was built.
5. When GSTR-3B ITC Exceeds GSTR-2B: Rule 88D and DRC-01C
This is the cost of skipping the reconciliation. Under Rule 88D, inserted by Notification No. 38/2023-Central Tax dated 4 August 2023, the system compares the ITC you claimed in GSTR-3B against the ITC available in your GSTR-2B. Where the claim exceeds GSTR-2B by more than 20% and by more than ₹25 lakh (the threshold recommended by the GST Council), the portal issues an automatic intimation in Form GST DRC-01C, Part A.
You then have 7 days to respond in Part B, by either:
- paying the excess credit with interest under Section 50 through Form GST DRC-03, or
- explaining the difference on the portal (for example, credit carried from an earlier period, or a recredit), or a mix of both.
Why the 7 days matter: if you neither pay nor explain within the window, you are barred from filing GSTR-1 or using the IFF for the next period under Rule 59(6). One unanswered intimation can stall your outward filing — which in turn blocks your buyers' credit on your invoices.
A DRC-01C is an intimation, not yet a demand. But left unanswered it can escalate into a show-cause notice under Section 73 or 74. If you ever receive one, our walkthrough on how to reply to a GST notice online covers the process.
Key Takeaways
- GSTR-2B is generated on the 14th and is static — it, not GSTR-2A, is the basis for your monthly ITC claim.
- Under Section 16(2)(aa), credit is available only where the invoice actually appears in your GSTR-2B; a valid invoice alone is not enough.
- IMS sits between GSTR-1 and GSTR-2B since October 2024. No Action means deemed accepted, so clear the dashboard before the statement generates.
- Auto-populated GSTR-3B ITC is currently editable, but claiming above your GSTR-2B is what invites scrutiny.
- Claim above GSTR-2B by more than 20% and more than ₹25 lakh and you get a Rule 88D intimation in DRC-01C — answer it within 7 days or lose the ability to file GSTR-1.
- Run the reconciliation every month between the 14th and the 20th, and keep the working.
Frequently Asked Questions
What is the difference between GSTR-2A and GSTR-2B?
GSTR-2A is dynamic and keeps updating as suppliers file, while GSTR-2B is static and generated once on the 14th for the previous month. ITC eligibility is read against GSTR-2B because it gives a fixed figure for the period.
Can I claim ITC that is in my books but not in GSTR-2B?
No. Under Section 16(2)(aa), the invoice must appear in your GSTR-2B, which depends on your supplier filing their GSTR-1. Once they file, the credit shows up in a later GSTR-2B and you claim it then, subject to the Section 16(4) time limit.
What happens if I ignore a DRC-01C intimation?
If you do not respond within 7 days — either paying through DRC-03 or explaining in Part B — you are barred from filing GSTR-1 or using the IFF for the next period under Rule 59(6), and the matter can escalate to a demand notice.
Is GSTR-3B ITC locked to the GSTR-2B figure in 2026?
As of June 2026, the ITC auto-populated into GSTR-3B from GSTR-2B is still editable on the portal. Claiming more than GSTR-2B is allowed by the system but triggers the Rule 88D comparison and a possible DRC-01C intimation. Always check gst.gov.in for the current portal position before filing.
By when must I claim ITC for an invoice?
Under Section 16(4), by 30 November following the end of the financial year to which the invoice relates, or the date of filing the annual return, whichever is earlier.
Disclaimer: This article is for informational purposes only and does not constitute professional tax advice. GST rules are subject to frequent changes through notifications and circulars. Please consult a qualified tax professional or verify the current provisions on the official GST portal (gst.gov.in) before making any compliance decisions.
Have a specific question about GSTR-2B reconciliation or a DRC-01C intimation? Our GST experts can help → gstconsultancy.com