Twelve Key Triggers for GST Show Cause Notices and How Assessees Can Respond

The CGST Act, 2017 has established a robust, technology-driven compliance architecture that enables the Proper Officer to initiate proceedings against registered persons through notices and intimations under Section 61, Section 65, Section 66, Section 73, Section 74, and Section 129. As GST administration increasingly relies on data analytics, cross-platform matching, and risk-profiling tools, the number of scrutiny notices being issued has grown substantially. Understanding the circumstances that trigger such notices — and the defenses available to assessees — is essential for effective GST compliance management.

This article identifies and examines twelve of the most frequently encountered grounds on which the department initiates proceedings, along with practical guidance for assessees who receive such notices.

1. Variance Between GSTR-1 and GSTR-3B

One of the most common triggers for scrutiny under Section 61 is the divergence between outward supply data and actual tax payment.

Under Section 37 read with Section 39, the outward supplies reported in GSTR-1 must align with the tax discharged through GSTR-3B. Where the department identifies a shortfall — whether due to an inflated GSTR-1 or an understated GSTR-3B — it issues a scrutiny notice alleging short payment of tax.

Assessee's Position:

  • Such mismatches frequently arise on account of timing differences between declaration and payment cycles.
  • Adjustments through credit notes or debit notes may legitimately cause apparent discrepancies.
  • A well-prepared reconciliation statement supported by books of accounts and ledgers constitutes the primary line of defense.

2. Classification as a High-Risk Taxpayer Based on Unusual Transaction Patterns

The DGARM (Directorate General of Analytics and Risk Management) employs risk-scoring models that flag certain registered persons for audit under Section 65. Indicators that typically trigger high-risk classification include:

  • Sudden and disproportionate spikes in declared turnover
  • ITC utilization consistently exceeding 95% of total ITC available
  • Frequent or unusually large refund claims
  • Transactions involving newly registered entities with minimal compliance history

Rule 86A additionally empowers the Proper Officer to block ITC in cases where it appears that the credit has been fraudulently availed.

Assessee's Position:

  • Detailed ledger reconciliation supported by corresponding business documentation — such as purchase orders, contracts, and bank statements — can effectively counter risk-based flagging.
  • Establishing the commercial rationale for transactional patterns is critical.

3. Invoice-Level Discrepancies Between Books of Accounts and GSTR-2B

GSTR-2B under Section 38 serves as the statutory basis for ITC availment under Section 16(2)(aa). Any divergence between the supplier's GSTR-1 filings and the recipient's records can jeopardize ITC entitlement.

Where the supplier has failed to report an invoice or has reported it incorrectly, the ITC availed by the recipient on that basis becomes susceptible to denial and recovery proceedings under Section 73 or Section 74.