Not in every case. A GSTR-2A mismatch by itself is not a timeless rule for denying every input tax credit (ITC) claim: the tax period, type of transaction, applicable statutory conditions and supporting evidence all matter. For covered domestic supplies from 1 January 2022, the central-law test generally turns on whether the supplier reported the invoice and its details were communicated in GSTR-2B—not simply on whether the item appears in GSTR-2A. A Gauhati High Court ruling adds a significant, jurisdiction-specific qualification for bona fide purchasers whose suppliers default.
Why the tax period changes the answer
Section 16(2) of the CGST Act sets conditions for claiming ITC. Depending on the transaction and period, these include holding the prescribed tax document, receiving the goods or services, the supplier paying the tax as required by law, filing the recipient’s return and satisfying the supplier-reporting conditions. Rule 36 sets out documentary requirements and has included limits on certain credit missing from supplier-reported details.
The relevant version of the law is the one applicable to the disputed tax period. The historical Rule 36(4) percentages below were ceilings for specified unreported invoices in relation to eligible credit reported by suppliers. They were not blanket ITC entitlements, nor general tolerances for any mismatch.
| Tax period | Applicable mismatch framework | How to read a 2A gap |
|---|---|---|
| 1 July 2017–8 October 2019 | Rule 36(4) had not yet taken effect. CBIC Circular 193/05/2023-GST (17 July 2023) says Circular 183/15/2022-GST guidance applies in toto for 1 April–8 October 2019. The earlier 2017–18 and 2018–19 periods also have CBIC verification guidance. | Absence from 2A did not itself create the later Rule 36(4) ceiling. That does not make every absent credit allowable: the applicable section 16 conditions and relevant verification guidance still matter. |
| 9 October–31 December 2019 | Rule 36(4) permitted unreported credit up to 20% of eligible credit reported by suppliers. CBIC Circular 193 also describes the use of the earlier verification guidance, subject to this ceiling. | Check the ceiling and the verification approach applicable to the particular period; do not treat the 20% as an automatic allowance. |
| 1 January–31 December 2020 | The Rule 36(4) ceiling was 10%. CBIC records a cumulative adjustment for February–August 2020 in the September return under the stated amendment. | Reconcile the eligible reported credit, unreported invoices and any applicable cumulative adjustment for the period. |
| 1 January–31 December 2021 | The Rule 36(4) ceiling was 5%. CBIC records a cumulative adjustment for April–June 2021 in the June return under the stated amendment. | Apply the period-specific limit and adjustment rather than assuming the later GSTR-2B condition governed the claim. |
| From 1 January 2022 | Section 16(2)(aa) and the amended rules introduced the supplier-reporting and communication condition tied to GSTR-2B. CBIC Circular 193 states that, for covered supplies, the supplier must report the invoice in GSTR-1 or IFF and it must be communicated to the recipient in GSTR-2B. | For an ordinary covered domestic invoice, a GSTR-2A mismatch is not the complete test; the statutory condition refers to communication in GSTR-2B. Consider the Gauhati High Court qualification described below where a bona fide purchaser faces a truant supplier. |
The percentages and dates in this table are the historical Rule 36(4) limits and transition dates recorded by CBIC in Circular 193/05/2023-GST, dated 17 July 2023. Circular 193 says its clarifications for 1 April 2019–31 December 2021 apply to ongoing scrutiny, audit, investigation and pending adjudication or appeal for the stated scope, not to completed proceedings. The circular’s detailed documentary requirements should be checked against the individual case.
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What changes from 1 January 2022?
For the covered post-2021 period, clause 16(2)(aa) requires the supplier to furnish invoice or debit-note details and for those details to be communicated to the recipient. Circular 193/05/2023-GST states: “Further, w.e.f. 01.01.2022, consequent to insertion of clause (aa) to sub-section (2) of section 16 of the CGST Act, ITC can be availed only up to the extent communicated in FORM GSTR-2B.”
That is the CBIC position for covered supplies; it does not eliminate the other statutory requirements for ITC. Nor should it be casually restated as a rule that any item missing from GSTR-2A is automatically ineligible: identify the relevant period, return statement and transaction type. For an ordinary domestic supplier invoice after the transition, however, showing payment to the supplier alone does not satisfy the supplier-reporting condition in the circular’s stated approach.
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What courts have said about mismatch disputes
Gauhati High Court: bona fide buyer and a defaulting supplier
In MCLEOD Russel India Limited (9 December 2025), the Gauhati High Court did not strike down section 16(2)(aa). It read the provision down temporarily: where a supplier acts truant, a bona fide purchaser must have an opportunity to prove its bona fides using tax invoices and other documents before ITC is denied. The approach was framed to operate until CBIC provides a practical solution.
This is a material qualification, not a nationwide Supreme Court ruling. The authorities cited here do not establish that the Supreme Court adopted this approach nationwide or that a later CBIC solution changed it. Whether the ruling governs a particular dispute depends on jurisdiction, subsequent authority and the facts.
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Karnataka High Court: credit not expected to appear in 2A
In Biocon Limited (30 April 2026), a 2018–19 mismatch demand included import and SEZ credits which the record said were not reflected in 2A by design. The court noted the Bill of Entry as the relevant document for import credit and set aside that part of the demand. The decision illustrates why an officer should identify the transaction behind a mismatch; it does not decide the post-2021 treatment of ordinary domestic supplier invoices.
Evidence and procedure remain important
Hindustan Construction Company Ltd (Karnataka High Court, 28 November 2025) concerned 2017–18 and 2018–19 proceedings and reproduced the historical CBIC framework. In Andromeda Sales and Distribution (Telangana High Court, 10 February 2026), the record included failure to provide supporting evidence, answer the show-cause notice or attend hearings; the court directed the taxpayer to pursue the appellate remedy. That outcome is a warning about procedure, not a holding that a mismatch alone proves ineligibility.
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How to assess a notice or disputed credit
- Identify the exact tax period and supply. Record each disputed invoice or debit note and determine whether it is an ordinary domestic forward-charge purchase, import, SEZ transaction, reverse-charge transaction or another category. The applicable rules and evidence may differ.
- Reconcile the records. Compare the purchase ledger with GSTR-3B, GSTR-2A and GSTR-2B. For each difference, identify whether it results from supplier non-reporting, late reporting, incorrect particulars, transaction type or another reconciliation issue.
- Test every applicable ITC condition. Review the tax document, receipt of the goods or services, recipient return and relevant supplier-payment/reporting conditions under the law applicable to the period. Do not assume that paying the invoice alone establishes eligibility.
- Gather transaction-specific proof. Keep the invoice or debit note, evidence of receipt, payment records, supplier communications and any available evidence of supplier reporting or tax payment. For import credit, the Bill of Entry may be relevant evidence.
- Answer the notice and follow the procedure. Explain the cause of each mismatch, attach the reconciliation and supporting records, address the applicable historical cap or post-2021 condition, and meet response and appeal deadlines. A failure to provide evidence or respond can weaken the challenge.
Circular 183/15/2022-GST and Circular 193/05/2023-GST contain detailed guidance for specified mismatch periods. Check their requirements rather than assuming that a particular certificate, threshold or document is sufficient in every case. The relevant State or Union Territory GST enactment, notifications, amendments and binding precedent must also be checked alongside the CGST framework.
What the answer means for your case
A GSTR-2A gap alone does not settle every ITC dispute. For older periods, the historical verification guidance and Rule 36(4) limits may control; for covered supplies from 1 January 2022, the central-law and CBIC position focuses on communication in GSTR-2B, subject to the Gauhati High Court’s limited qualification for bona fide purchasers facing supplier default. Transaction type, records, jurisdiction and procedural history can change the result, so an individual notice or appeal should be reviewed with a qualified Indian GST professional.
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