GST audit ensures accuracy of returns, ITC claims, and tax payments. Three types: self-certified GSTR-9C (turnover > ₹5 crore), departmental audit (Section 65), and special audit (Section 66). This guide covers all three with reconciliation checklists and compliance tips.
Annual self-certified reconciliation statement filed with GSTR-9. Taxpayer reconciles books of accounts with GST returns. No external auditor required since FY 2020-21.
GST department can audit any registered person for a financial year. Officer examines records, books of account, and returns. Must complete within 3 months (extendable by 6 months).
Ordered when complexity of case requires special examination — e.g., valuation issues, classification disputes, large ITC claims. Commissioner directs a CA/CMA to audit. Cost borne by the department.
Reconcile GSTR-1 (outward supply) with books of accounts — invoice-level matching
Reconcile GSTR-3B (summary return) with GSTR-1 and books
Match ITC claimed in GSTR-3B with GSTR-2B (auto-generated from supplier data)
Verify ITC reversals under Rule 42/43 (common credit for exempt + taxable supplies)
Check HSN-wise summary in GSTR-9 matches actual product/service classification
Verify RCM liability is correctly computed and paid in cash
Reconcile e-way bills with invoices and delivery records
Check for any credit notes/debit notes not reported in returns
Verify TDS/TCS deducted/collected is correctly reported
Ensure all amendments (GSTR-1 amendments) are captured in books
No. From FY 2020-21 onwards, the requirement for GST audit by a Chartered Accountant or Cost Accountant has been removed. The GSTR-9C reconciliation statement is now self-certified by the taxpayer. However, taxpayers with turnover exceeding ₹5 crore must still file GSTR-9C along with GSTR-9. Many businesses still engage CAs voluntarily for accuracy.
Taxpayers with aggregate turnover exceeding ₹5 crore in a financial year must file GSTR-9C (reconciliation statement) along with GSTR-9 (annual return). Turnover below ₹5 crore: only GSTR-9 is required (GSTR-9C optional). Turnover below ₹2 crore: even GSTR-9 is optional.
If departmental audit (Section 65) finds discrepancies: the officer issues audit observations → taxpayer responds → if tax shortfall confirmed, a demand notice under Section 73 (no fraud) or Section 74 (fraud) is issued. Taxpayer must pay differential tax + interest (18% p.a.). If fraud/suppression: 100% penalty on tax amount.
Under Section 65, the department can initiate audit for any period within 5 years from the due date of annual return for that year. For fraud/suppression cases under Section 74, the extended period is 5 years. The Limitation Act and recent amendments may affect specific timelines.
Under Section 35 and Rule 56: all invoices, bills of supply, credit/debit notes, receipt vouchers, payment vouchers, refund vouchers, delivery challans, e-way bills, stock registers, input/output registers, ITC registers, and all books of accounts. Records must be maintained at the principal place of business for at least 72 months (6 years) from the due date of annual return.
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