When is a tax audit applicable in India? FY 2025-26 thresholds under Section 44AB, presumptive schemes, forms, due dates, and penalty rules explained.
Section 44AB of the Income Tax Act requires certain businesses and professionals to get their accounts audited by a Chartered Accountant. With the Union Budget 2026 reaffirming the digital-payments-led threshold of ₹10 crore for businesses, FY 2025-26 audits are increasingly automated, AIS-linked, and tightly scrutinised. This guide walks you through who is liable for tax audit, the latest thresholds, the forms used, and the consequences of non-compliance.
Who is liable for tax audit?
Tax audit applicability depends on the nature of income, turnover, and the level of digital transactions. The two most common categories are business and profession.
- Business — turnover above ₹1 crore in the financial year, raised to ₹10 crore if at least 95% of receipts and payments are non-cash.
- Profession — gross receipts above ₹50 lakh in the financial year.
- Presumptive income (Section 44AD) — audit if you claim profit lower than 8% (6% for digital receipts) and total income exceeds the basic exemption limit.
- Presumptive profession (Section 44ADA) — audit if you claim profit lower than 50% and total income exceeds the basic exemption.
- Presumptive transport (Section 44AE) — audit if income claimed is lower than the prescribed amount per vehicle per month.
Key thresholds for FY 2025-26
- Business with cash receipts/payments above 5% of total — audit at ₹1 crore turnover.
- Business with cash receipts/payments up to 5% of total — audit at ₹10 crore turnover.
- Professional — audit at ₹50 lakh gross receipts.
- 44ADA professionals — turnover limit raised to ₹75 lakh (subject to cash receipts <=5%) by Finance Act 2023, retained thereafter.
- 44AD businesses — turnover limit raised to ₹3 crore (subject to cash receipts <=5%) by Finance Act 2023, retained thereafter.
Tax audit forms
- Form 3CA — for taxpayers already required to get accounts audited under any other law (e.g., companies under the Companies Act).
- Form 3CB — for taxpayers not audited under any other law (most proprietorships and partnerships).
- Form 3CD — detailed audit report annexed to both 3CA and 3CB.
- Form 3CEB — additional report for international and specified domestic transactions (transfer pricing).
Due dates and UDIN
For AY 2026-27, tax audit reports must be uploaded by 30 September 2026, and ITR-6 (or applicable ITR) filed by 31 October 2026 for non-transfer-pricing cases. The auditor's UDIN must be quoted in the report — without UDIN, the report is treated as invalid.
Consequences of non-compliance
- Penalty under Section 271B — 0.5% of turnover, capped at ₹1,50,000.
- Reasonable cause defence under Section 273B — accepted only in genuine cases (e.g., natural calamity, partner's demise).
- Belated audit report uploaded after the ITR due date — return becomes defective under Section 139(9).
- Disallowance of expenses under Sections 40(a), 43B, etc., for non-compliance flagged in the audit report.
Practical compliance tips
- Reconcile books with GSTR-3B, GSTR-1, GSTR-2B, and AIS monthly — auditors will look at all of these.
- Track digital vs cash receipts and payments to qualify for the ₹10 crore threshold.
- Keep TDS and TCS data ready — clause 34 of Form 3CD demands every transaction-level detail.
- Issue 3CD pre-clauses to your auditor at least 30 days before the due date.
Special audit triggers
Beyond Section 44AB, several other audits may apply concurrently — GST audit by department officers under Section 65 of the CGST Act for high-risk taxpayers, transfer pricing audit under Section 92E, tax audit of charitable trusts under Section 12A read with Rule 17B, and statutory audit under the Companies Act, 2013 for all companies. Each audit has its own scope, due date, and reporting form, so map them collectively to avoid year-end overload.
Working effectively with your auditor
The most common cause of audit delay is delayed sharing of data. Build a clause-wise checklist in May, share trial balance by 30 June, and provide all 3CD-clause workings (TDS reconciliations, MSME outstanding, related-party transactions, ICDS adjustments) by mid-July. This leaves the auditor seven weeks to finalise the report and well before the 30 September deadline, with capacity for queries and rework if needed.
Conclusion
Tax audit is no longer a paperwork exercise — every clause now matches an AIS or GST data point. Know your threshold, prefer digital settlements to access the higher ₹10 crore limit, and engage your auditor early. Done well, your AY 2026-27 audit closes by mid-September, leaving room for a clean ITR filing well before 31 October.
