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Income Tax · BusinessTax audit Form 3CA vs 3CB vs 3CD: reporting differences
A tax audit report has two parts: an audit report (Form 3CA or 3CB) and a statement of particulars (Form 3CD) with dozens of clauses. Here is when each form applies, what the key Form 3CD clauses ask, and how to prepare for them.
When a business or profession crosses the limits of Section 44AB of the 1961 Act (Section 63 of the Income-tax Act, 2025), its accounts must be audited by a chartered accountant and a report filed before the return. For FY 2025-26, the report consists of Form 3CA or 3CB plus Form 3CD.
3CA or 3CB?
| Form | When | Typical taxpayers |
|---|---|---|
| 3CA | Accounts already audited under another law | Companies, LLPs required to be audited, co-operative societies, trusts audited under State laws |
| 3CB | No audit under any other law | Proprietorships, partnership firms, individuals in profession |
Form 3CA refers to the statutory audit already done; Form 3CB contains the CA's opinion on the accounts and the true and fair view. Both are accompanied by Form 3CD.
Form 3CD: structure
Form 3CD has two parts:
- Part A – basic information: name, PAN, address, status, registration numbers (GST), previous year.
- Part B – 44 clauses of particulars.
Key Form 3CD clauses that cause trouble
| Clause (FY 2025-26 form) | What is reported | Common issues |
|---|---|---|
| 8 / 8a | Relevant clause of 44AB; new regime option | Correct trigger (turnover, presumptive, opt-out) |
| 11 | Books of account maintained | List, location |
| 12 | Presumptive income included | — |
| 13 | Method of accounting, ICDS adjustments | Deviations from ICDS |
| 14 | Valuation of stock | Inclusive/exclusive of GST |
| 18 | Depreciation as per tax rules | Half-rate, additions, sales |
| 19 / 20 | Deductions under 32AC, 35 etc.; employee contributions to PF/ESI paid late | Late PF/ESI disallowed |
| 21 | Disallowances: 40(a) TDS defaults, 40(b) partners, 40A(3) cash, 43B | Large 40(a)(ia) and 40A(3) amounts |
| 22 | Interest inadmissible under MSMED Act | 43B(h) and interest |
| 26 | Section 43B items – paid / unpaid | GST, PF, bonus, MSE dues |
| 31 | Loans/deposits accepted or repaid in cash (269SS/269T); receipts in cash (269ST) | Cash loans |
| 34 | TDS/TCS compliance – deducted, paid, late, statements | Short deduction, late payment, interest |
| 44 | Break-up of expenditure into GST-registered and unregistered entities | Vendor GST data |
Worked example: a trader's audit
Example: Metro Supply Co., a proprietorship in Pitampura with turnover of ₹4.2 crore and 12% cash receipts, needs a tax audit for FY 2025-26 (turnover above ₹1 crore, and cash receipts above 5% so the ₹10 crore limit is not available). Form 3CB + 3CD applies. During the audit:
| Item found | Clause | Effect |
|---|---|---|
| Cash payments to suppliers above ₹10,000/day: ₹2,10,000 | 21(d) | Disallowed |
| TDS not deducted on rent of ₹6,00,000 | 21(a), 34 | 30% (₹1,80,000) disallowed |
| PF of employees deposited after due date: ₹48,000 | 20(b) | Disallowed |
| Dues to a micro manufacturer unpaid beyond 45 days: ₹3,50,000 | 22, 26 | Disallowed for FY 2025-26 |
Total additions of ₹7,88,000 to income – most of which could have been avoided with monthly compliance.
Timelines
- Statutory due date: 30 September (one month before the ITR due date of 31 October).
- FY 2025-26: extended to 21 October 2026 by CBDT Circular 07/2026 (ITR to 21 November 2026).
- Transfer pricing cases: audit report by 31 October; Form 3CEB separately.
- The taxpayer must accept the report on the portal.
Documents the auditor will ask for
- Books, bank statements, cash book, stock records.
- GST returns (GSTR-1, 3B, 9) and reconciliation with books.
- TDS returns, challans, Form 26AS/AIS.
- Fixed asset register and purchase invoices.
- Loan confirmations and interest workings.
- Udyam status of suppliers.
- Partnership deed (for firms), MOA/AOA (for companies).
Penalty
Failure to get the audit or furnish the report: 0.5% of turnover, maximum ₹1.5 lakh (Section 271B), unless reasonable cause. Budget 2026 proposed converting such audit-related penalties into fees, as reported – check the enacted provision.
Under the 2025 Act
For Tax Year 2026-27, the audit is under Section 63 and the forms are those in the Income-tax Rules, 2026. The substance of reporting – TDS, cash, MSME, GST – is expected to remain similar. Check our tax audit applicability checker.
Key takeaway
3CA if already audited under another law, 3CB otherwise – both with 3CD. Most painful 3CD findings (cash payments, TDS, PF, MSME dues) are preventable with monthly compliance. Our tax audit service begins with a pre-audit review to fix issues before the report.
Official references
Official sources to verify the current text, notifications and circulars:
Frequently asked questions
When is Form 3CA used?
When the taxpayer's accounts are already required to be audited under another law – for example companies under the Companies Act, LLPs above the LLP audit thresholds, co-operative societies.
When is Form 3CB used?
When accounts are not required to be audited under any other law – typically proprietorships and partnership firms.
Who approves the tax audit report on the portal?
The CA uploads the report and the taxpayer must accept it on the e-filing portal. Until accepted, the report is not treated as filed.
Will the forms change under the 2025 Act?
Yes. Audits for Tax Year 2026-27 (due in 2027) will use the forms prescribed under the Income-tax Rules, 2026. Audits for FY 2025-26 use Forms 3CA/3CB/3CD.
Can a tax audit report be revised?
Yes, in limited cases such as a change in law or payment after the audit affecting disallowances; the revised report must be uploaded with reasons.
Does the auditor need UDIN for the tax audit report?
Yes. A UDIN must be generated for every tax audit report and quoted while uploading.
Is GST reconciliation part of the tax audit?
Form 3CD asks for GST turnover and expenditure split by GST registration status; auditors reconcile books with GST returns.
This article is general information on the law as on 10 November 2026, written for educational purposes. It is not professional advice for your case. Section numbers under the Income-tax Act, 2025 should be confirmed with the official section mapping on the Income Tax Department website before use in filings.
Have a tax, GST or business question?
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