A GST audit is a verification process under Section 2(13) of the CGST Act that cross-checks your returns, turnover, input tax credit (ITC) and tax payments to ensure accuracy and compliance. For businesses, it is essentially a review of whether reported figures match actual financial records and GST filings.
Under India’s GST system, which operates largely on self-assessment, an audit serves as a compliance safeguard to confirm that taxes have been correctly calculated and credits have been properly claimed. If your books, GST returns and reconciliations are accurate, a GST audit is a routine verification rather than a disruption.
Preparing in advance with the right documents, reconciliations and awareness of common red flags can make the process smooth and stress-free.
Documents required for a GST audit?
As per Section 65, the tax department can initiate a GST audit by serving a notice in Form GST ADT-01, specifying the documents required for verification.
- External Financial Records
It includes:
- Audited financial statements: Balance Sheet, Profit and Loss Account and Cash Flow Statement
- Income Tax Audit Report (Form 3CD): Used to reconcile income tax data with GST data
- Trial balance: For the entire financial year under audit
- Internal GST Records
It includes:
- Sales and purchase registers: Detailed transaction records, including exempt and nil-rated supplies
- Stock register: Records of opening and closing stock, along with goods lost, stolen or destroyed
- ITC register: Details of input tax credit availed, reversed and utilised
- Transactional Documents
It includes:
- Bank statements: To verify customer receipts and supplier payments
- Delivery challans: For goods sent on approval or job work
- E-way bills: To validate the movement of goods against sales records
- Tax invoices: All inward and outward invoices for the period under audit
Pre audit checklist
One should conduct an internal pre-audit before the tax officers arrive to check this. It includes:
- Blocked credits: Cross-check that ITC has not been claimed on items restricted under Section 17(5), such as food and beverages, personal consumption items or motor vehicles (with specified exceptions).
- HSN/SAC accuracy: Ensure correct Harmonised System of Nomenclature (HSN) codes are used for all products and services, along with applicable GST rates (5%, 12%, 18% or 28%).
- Real-time stock verification: Confirm that physical stock matches book records. Significant differences may lead to ‘deemed supply’ concerns.
- Reverse Charge Mechanism (RCM): Ensure tax has been paid on applicable services such as GTA (transport), legal services and imports under Section 9(3).
- GSTR-1 vs GSTR-3B reconciliation: Verify that tax has been correctly reported and paid on notified supplies and services, including RCM transactions.
- GSTR-3B vs GSTR-2B reconciliation: Ensure ITC claims do not exceed what suppliers have reported in GSTR-2B.
Common red flags that attract scrutiny
Tax authorities increasingly use data analytics and return-matching systems to identify review cases. If your data shows such patterns, the chances of receiving a notice may increase:
- Huge ITC mismatches: If the ITC claimed in GSTR-3B is consistently higher than what appears in GSTR-2B, it can attract scrutiny.
- Immediate spike in turnover: A sudden 100% increase in sales in one month, followed by a nil return in the next, may appear suspicious to authorities.
- High refund claims: Businesses that frequently claim refunds, such as exporters, are often reviewed to ensure invoices are genuine and claims are valid.
- Non-payment of RCM: If financial statements show high legal or similar expenses but GST returns reflect no RCM payments, it may raise red flags.
- Mismatch between GST and income tax turnover: Differences between GST turnover and revenue reported in the Income Tax Return (ITR) may trigger further examination.
What happens after a GST notice is issued
The process mentions a legal timeline as per Section 65:
- Notice (ADT-01): A business receives a notice at least 15 days before the audit begins.
- Conducting the audit: Authorities may visit the business premises or request submission of relevant documents for verification.
- Audit findings (ADT-02): After completion, the authorities may issue a report in Form GST ADT-02 within 30 days outlining their findings.
- Opportunity to explain: The business can respond to the findings. If explanations are satisfactory, the matter is closed.
- Show cause notice (SCN): If authorities are not satisfied, an SCN may be issued under Section 73 (non-fraud cases) or Section 74 (fraud, wilful misstatement or suppression, subject to applicable law).
- Final order (DRC-07): If the SCN is not adequately defended, a final demand order is issued for tax, interest and penalty.
How to avoid GST audit issues
A business can reduce audit risks by following these measures:
- Conduct regular internal audits: Engage a professional to review accounts at least once a year to identify and correct discrepancies early.
- Reconcile ITC monthly: Regularly match input tax credit (ITC) with GSTR-2B to avoid mismatches and reversals.
- Work with compliant suppliers: Ensure vendors file returns correctly and on time to prevent ITC-related issues.
- Respond promptly to notices: Reply immediately to any communication from tax authorities to avoid escalation or penalties.
Tools like TallyPrime help simplify GST compliance and keep businesses audit-ready throughout the year, with accurate records and real-time reconciliation.
