Income Tax Audit (Section 44AB) — Who Needs It, Process, Forms (2026)
Income tax audit (Section 44AB) — who needs it, process, Form 3CA / 3CB / 3CD, due date, penalty. From ₹9,999. CA-led.
Tax audit under Section 44AB of the Income Tax Act, 1961 is mandatory for certain businesses + professionals. In this guide, we cover the eligibility, process, forms, and penalties.
What is Tax Audit?
Tax audit is a review of the books of accounts of a taxpayer by a practicing Chartered Accountant (CA). The CA verifies the accuracy + completeness of the books and issues a tax audit report in Form 3CA / 3CB + 3CD. Mandatory for businesses / professionals with turnover above the prescribed threshold.
Who Needs Tax Audit?
- Businesses (other than Section 44AD / 44ADA / 44AE) with turnover > ₹1Cr
- Section 44AD businesses with cash transactions < 5% and turnover > ₹10Cr
- Section 44AD businesses with cash transactions > 5% and turnover > ₹1Cr
- Specified professionals (Section 44ADA) with gross receipts > ₹75L (cash) or ₹1Cr (cash < 5%)
- Section 44AE (goods carriages) with turnover > ₹1Cr
- Losses: Business loss > ₹5L (without tax audit, cannot claim)
- Income below taxable limit but losses to be carried forward
- Claim of deduction under Section 80-IA / 80-IB / 80-IC / 80-ID / 80-IE / 80JJAA (some specific cases)
Forms for Tax Audit
| Form | Who Files | Purpose |
|---|---|---|
| Form 3CA | Companies + LLPs (audited books) | Audit report |
| Form 3CB | Others (proprietorship, partnership, HUF) | Audit report |
| Form 3CD | Everyone (along with 3CA / 3CB) | Statement of particulars (35+ clauses) |
Form 3CD — Key Clauses
- Clause 8: Method of accounting (cash / mercantile / hybrid)
- Clause 13: Amounts not allowable under Section 40 + 40A
- Clause 16: Depreciation (Section 32)
- Clause 17: Section 43B payments (PF, ESI, bonus, etc.)
- Clause 21: Payments to specified persons (related parties)
- Clause 22: Section 80JJA (employment generation)
- Clause 24: Quantitative details of goods + raw materials
- Clause 25-31: TDS / TCS reconciliation
- Clause 32: GST reconciliation
- Clause 33A: Turnover reconciliation with GST + ITR
- Clause 36: Disclosure of income not credited to P&L
- Clause 40: Previous year's income offered in current year
- Clause 41-44: Foreign income / assets / remittance
Tax Audit Process
Step 1: Books Finalisation
CA finalises the books of accounts — P&L, Balance Sheet, Cash Flow, Notes to Accounts. Reconciles TDS + GST + 26AS.
Step 2: Fieldwork
CA + team test transactions, verify vouchers, sample data, raise queries. May visit the business premises.
Step 3: Form 3CD Preparation
CA prepares Form 3CD with all disclosures, reconciliations, and explanations.
Step 4: Audit Report Signing
CA signs Form 3CA (for audited entities) or 3CB (for non-audited) + 3CD. UDIN (Unique Document Identification Number) is mandatory.
Step 5: ITR Filing
ITR (Form 3 / 4 / 5 / 6 / 7) is filed with the audit report attached. Due: 30 September (without TP) / 31 October (with TP).
Timeline
| Step | Timeline |
|---|---|
| Books finalisation | 7-15 days |
| Fieldwork + queries | 5-10 days |
| Form 3CD preparation | 5-10 days |
| Audit report signing | 1-2 days |
| ITR filing with audit report | 1 day |
| Total | 15-30 days |
Penalty for Non-Compliance
- Failure to get tax audit: 0.5% of turnover OR ₹1,50,000, whichever is lower
- Late filing of audit report: ₹1,500/month or part of the month (Section 271B)
- Failure to produce audit report: ₹10,000 for each default
- Wrong information in audit report: CA may lose ICAI membership
Cost
| Type | Cost |
|---|---|
| Tax audit (small business) | From ₹9,999 |
| Tax audit (mid-size business) | From ₹17,999 |
| Tax audit (multi-entity / multi-FY) | From ₹29,999 |
| Transfer pricing study + tax audit | From ₹49,999 |
Frequently Asked Questions
Q: What is the tax audit due date?
A: 30 September of the assessment year (for non-TP cases). 31 October (for TP cases). E.g., for FY 2024-25, due 30 September 2025 / 31 October 2025.
Q: Who can sign the tax audit report?
A: Only a practicing Chartered Accountant (CA) with ICAI membership + certificate of practice + UDIN on the report.
Q: What is the difference between 3CA and 3CB?
A: 3CA: For entities already subject to statutory audit (companies, LLPs with audit). 3CB: For entities not subject to statutory audit (proprietorships, partnerships, HUFs). Both accompanied by 3CD.
Q: What is the difference between tax audit and statutory audit?
A: Tax audit: verifies compliance with tax laws (Section 44AB). Statutory audit: verifies true + fair view of financial statements (Companies Act 2013). Both done by CAs but for different purposes.