Every month between the 14th and the 20th, accounts teams spend hours matching purchase ledgers with GSTR-2B statements. When the totals match to the rupee, accountants assume their input tax credit is safe. Months or years later, an email alerts them to a notice in the portal, leaving them wondering what went wrong.
Matching your purchases with GSTR-2B is essential, but it satisfies only one statutory condition. The Central Goods and Services Tax Act contains several independent hurdles that every rupee of input tax credit must pass. A valid invoice on the portal cannot override legal ineligibility or operational failures in your business records.
Why GSTR-2B matching is not a complete shield against notices
Under Section 16(2) of the CGST Act, a registered person can claim input tax credit only when four primary baseline conditions are met simultaneously:
- Possession of a tax invoice: You must hold a valid tax invoice or debit note issued by a registered supplier under Section 16(2)(a).
- Communication in GSTR-2B: The supplier must furnish invoice details in GSTR-1, and those details must appear in your GSTR-2B under Section 16(2)(aa).
- Actual receipt of supply: You must have received the goods or services under Section 16(2)(b).
- Tax paid to the government: The tax charged on the supply must be paid to the government treasury under Section 16(2)(c).
Reconciliation addresses only the second condition: Section 16(2)(aa). It confirms that the supplier filed their outward statement. It does not prove that goods were delivered to your warehouse, that your firm paid the supplier within legal timeframes, or that the expense qualifies for business credit.
Common mistake: Assuming that an invoice appearing in GSTR-2B automatically grants an unrestricted right to take credit. If the expense falls under blocked categories, auto-population does not make it eligible.
Five common GST notices that arrive after reconciliation
When tax authorities examine returns during scrutiny or audit, they look beyond portal matching. Here are the five most frequent notices businesses face despite complete GSTR-2B matching:
1. Rule 88D intimation in Form GST DRC-01C
The GST portal generates an automated intimation under Rule 88D in Form GST DRC-01C when the ITC availed in Table 4 of GSTR-3B exceeds the eligible ITC auto-populated from GSTR-2B beyond the notified threshold percentage and amount.
Even when your purchase register matches your current GSTR-2B, a DRC-01C notice can still trigger in these scenarios:
- Manual entry errors in Table 4: An accountant manually edits Table 4(A)(5) to claim older missed credits without adjusting the current month figures correctly.
- Failure to account for credit notes: Your vendor uploaded credit notes in GSTR-1 that were omitted from your internal accounting software, resulting in a net claim higher than the portal figure.
- Ineligible credit inclusion: Adding exempt supplies or non-business items directly into eligible lines rather than routing them through reversal tables.
You have exactly seven days to submit your explanation or deposit the tax through Form GST DRC-03. For step-by-step drafting instructions, review our guide on DRC-01C ITC mismatch notice replies.
2. Supplier registration cancellation with retrospective effect
One of the most disruptive notices arises when the department cancels a vendor registration with retrospective effect under Section 29. Even if the vendor filed GSTR-1 and the invoice reflected in your GSTR-2B at the time of purchase, subsequent fraud investigations against that vendor often lead to recovery notices against buyers.
Tax officers argue that transactions with a cancelled entity are invalid under Section 16(2)(c), issuing show cause notices under Section 73 or Section 74. In such situations, having a GSTR-2B entry is insufficient. You must furnish solid third-party evidence: lorry receipts, weighbridge slips, physical stock inward registers, and banking payment records showing legitimate commercial transactions.
3. Rule 37 reversal for non-payment within 180 days
Under the second proviso to Section 16(2) and Rule 37 of the CGST Rules, a recipient who avails ITC must pay the supplier the invoice value along with the tax within 180 days from the invoice date. If payment is not completed within this statutory window, the credit must be reversed in Table 4(B)(2) of Form GSTR-3B.
Notice risk: Departmental audit teams review your sundry creditors aging schedule during scrutiny. If they discover vendor balances unpaid beyond 180 days where ITC was claimed, they issue demand notices for the tax amount plus 18% annual interest under Section 50(3).
You can re-avail this input tax credit under Rule 37(2) once the payment is remitted to the supplier, reporting the reclaimed amount in Table 4(A)(5) and Table 4(D)(1) of GSTR-3B. However, any interest accrued during the intervening default period cannot be recovered or refunded.
4. Section 17(5) blocked credit inquiries
Vendors issue valid GST invoices for all commercial transactions, and those invoices appear in your GSTR-2B without distinction. The portal does not filter out expenses that are statutorily blocked for your specific business activity.
Scrutiny notices frequently demand reversal and penalties for items restricted under Section 17(5):
- Motor vehicles and insurance: Purchase, lease, or repair of passenger motor vehicles with seating capacity up to thirteen persons under Section 17(5)(a) and (ab), unless used for passenger transportation, driving instruction, or further vehicle supply.
- Food, beverages, and catering: Outdoor catering and meal expenses for office events or staff lunches under Section 17(5)(b)(i), unless required by statutory employment law.
- Works contract for civil structures: Works contracts or construction materials for immovable property capitalized in your balance sheet under Section 17(5)(c) and (d).
- Personal consumption and gifts: Festival gifts distributed to clients, employee personal perks, or inventory written off under Section 17(5)(g) and (h).
To inspect the statutory restrictions in detail, see our guide on blocked credit under Section 17(5) with examples.
5. Allegations of non-receipt under Section 16(2)(b) and DRC-01
Tax authorities routinely cross-reference e-way bill portals with toll plaza records and vehicle movement logs. When an invoice appears in GSTR-2B but lacks a corresponding e-way bill, or the vehicle registration number indicates a passenger vehicle incapable of transporting bulk commodities, officers initiate formal proceedings.
These inquiries arrive as formal show cause notices accompanied by a summary in Form GST DRC-01 under Rule 142(1)(a). To understand statutory reply timelines and legal consequences, check our breakdown of GST notice DRC-01 meaning and reply procedures.
Worked example: reconciliation matched but notice issued
Consider a manufacturing unit, Apex Industrial Components, operating in Pune. In November 2025, the accounts team conducted its monthly reconciliation and found all four vendor invoices matched perfectly with GSTR-2B. The firm availed ₹2,34,000 as input tax credit in Form GSTR-3B.
Six months later, the jurisdictional tax officer initiated audit scrutiny and examined the ledger accounts. Here is the breakdown of the invoices and the resulting departmental findings:
| Invoice | Expense description | ITC claimed | In GSTR-2B | Audit status | Statutory outcome |
|---|---|---|---|---|---|
| INV-1021 | Raw steel bars | ₹1,08,000 | ₹1,08,000 | Eligible | Accepted: physical receipt and e-way bill verified |
| INV-1044 | Corporate car repair and service | ₹36,000 | ₹36,000 | Disallowed | Notice issued: blocked credit under Section 17(5)(ab) |
| INV-1089 | Office renovation civil works | ₹54,000 | ₹54,000 | Disallowed | Notice issued: capitalized works contract under Section 17(5)(c) |
| INV-1102 | Machinery spares (unpaid after 180 days) | ₹36,000 | ₹36,000 | Reversal due | Notice issued: unpaid vendor balance under Rule 37 with 18% interest |
In this worked case, while ₹2,34,000 appeared correctly in GSTR-2B, only ₹1,08,000 was legally defensible. The company received a demand for ₹1,26,000 along with mandatory interest under Section 50 and penalties under Section 73. This shows why matching GSTR-2B is only the first step in protecting your tax position.
How to audit your books beyond invoice matching
To insulate your business against post-reconciliation notices, establish a multi-tier verification process before filing Form GSTR-3B each month:
- Tag ineligible ledger accounts in your ERP: Configure separate expense accounts in Tally Prime, Zoho Books, or SAP for staff welfare, vehicle maintenance, travel, and guest hospitality. Ensure that GST amounts on these accounts are routed directly to expenses rather than the input tax ledger.
- Maintain an active 180-day creditor aging report: Run a monthly creditors aging analysis on the 10th of every month. Flag invoices approaching 150 days. If payment cannot be released before 180 days, reverse the credit in Table 4(B)(2) of GSTR-3B to prevent statutory interest liabilities.
- Match e-way bills with material inward registers: Verify that high-value invoices above ₹50,000 have matching e-way bills and goods receipt notes (GRN) attached to the physical voucher.
- Verify vendor filing status periodically: Check whether your regular vendors are filing their GSTR-3B returns consistently. A vendor who uploads invoices in GSTR-1 but repeatedly defaults on GSTR-3B creates audit scrutiny risks under Section 16(2)(c).
If you receive an intimation regarding a cancelled supplier, use this structured response template to establish your bonafide transaction:
Related guides
- GSTR-2B tax amount mismatch: why the tax differs and how to fix it
- How to use a GSTR-2B reconciliation tool
- How accountants can automate GSTR-2B reconciliation
- GSTR-9 Table 14: reporting differential tax paid in cash with Form DRC-03 reconciliation
Frequently asked questions
Can I get a GST notice if my GSTR-2B matches my purchase register?
Yes. GSTR-2B reconciliation satisfies only the reporting condition under Section 16(2)(aa). Tax officers can still issue notices under Section 17(5) for blocked credits, Rule 37 for unpaid vendor invoices exceeding 180 days, Section 16(2)(b) for non-receipt of goods, or Section 73 and 74 if a supplier registration is cancelled with retrospective effect.
Why did I receive Form GST DRC-01C when all invoices matched?
Form GST DRC-01C is an automated system intimation under Rule 88D triggered when the total ITC claimed in Table 4 of GSTR-3B exceeds the eligible ITC auto-populated from GSTR-2B by the notified percentage and amount. It occurs when accountants manually increase Table 4 values, adjust previous reversals without clearing discrepancies, or fail to deduct ineligible items.
What happens if a supplier registration is cancelled retrospectively after I claimed ITC?
Tax authorities often issue demand notices under Section 73 or Section 74 proposing to disallow ITC on grounds that supplies from cancelled dealers are non-genuine. To defend against such demands, you must establish bonafide receipt using tax invoices, e-way bills, lorry receipts, bank payment proof, and evidence that the supplier was active on the date of transaction.
How does Rule 37 cause tax notices even with perfect GSTR-2B matching?
Under the second proviso to Section 16(2) and Rule 37, you must pay the supplier the invoice value plus tax within 180 days from the invoice date. If payment is delayed beyond 180 days and the credit is not reversed in Table 4(B)(2) of GSTR-3B, the department can demand reversal of ITC along with 18% annual interest under Section 50.
Check your own GSTR-2B
Reconcile your purchase register against GSTR-2B to identify missing supplier filings, value mismatches, and status discrepancies. Your GSTR-2B and purchase register files are read in your browser and never uploaded to any server.
Last checked: 14 October 2026. Sources: CBIC CGST Act Section 16, CBIC CGST Rules Rule 37, GSTN DRC-01C Advisory.