Tax Audit, MAT & AMT — Sections 63, 206 [Income Tax Act, 2025]

Key Takeaways

• Section 63 of the Income Tax Act, 2025 (formerly Section 44AB of the Income Tax Act, 1961) mandates tax audit for businesses with turnover exceeding Rs. 1 crore (Rs. 10 crore if cash receipts and payments are each below 5% of total) and professions with gross receipts exceeding Rs. 50 lakhs.
• Form 3CA is the audit report for persons whose accounts are required to be audited under any other law (e.g., companies under Companies Act). Form 3CB is for all other persons.
• Form 3CD is the statement of particulars with 44 clauses covering all aspects of the taxpayer's income, deductions, and compliance.
• Tax audit report must be filed electronically by 30 September of the Assessment Year.
• Section 206 of the Income Tax Act, 2025 (formerly Section 115JB) requires companies to pay tax on book profit at 15% (plus surcharge and cess) if the tax payable under normal provisions is less than 15% of book profit. MAT credit is available under Section 206 for carry-forward up to 15 years.
• AMT (Alternate Minimum Tax) applies to non-corporate taxpayers (individuals, HUFs, firms, AOPs) at 18.5% of adjusted total income.
• Persons with adjusted total income below Rs. 20 lakh are exempt from AMT provisions.

Section 63 — Tax Audit

Who Must Get Tax Audit Done?

| Category | Threshold | Audit Required | |----------|-----------|---------------| | Business — General | Total sales/turnover/gross receipts > Rs. 1 crore | Yes | | Business — Cash below 5% | Total sales/turnover/gross receipts > Rs. 10 crore, provided cash receipts and cash payments are each < 5% of total receipts and total payments | Audit required only if turnover > Rs. 10 crore | | Profession — General | Gross receipts > Rs. 50 lakhs | Yes | | Profession — Section 58 (44ADA) | Gross receipts > Rs. 75 lakhs (where income declared < 50% of gross receipts) | Yes, if opting out of presumptive | | Presumptive (Section 58/44AD) — opted in but declaring < 8%/6% | Any turnover where income declared is less than deemed percentage | Yes | | Presumptive (Section 58/44AD) — opted in, declaring >= 8%/6% | Turnover up to Rs. 3 crore (Rs. 3 crore if cash < 5%) | No audit required | | Presumptive (Section 58/44AD) — opted out within 5 years | Irrespective of turnover for 5 subsequent years | Yes, mandatory |

The 5% Cash Rule — Expanded Threshold

The enhanced Rs. 10 crore threshold applies only when:

1. Cash receipts do not exceed 5% of total receipts during the Tax Year, AND
2. Cash payments do not exceed 5% of total payments during the Tax Year

If either condition is breached, the threshold reverts to Rs. 1 crore. Digital payments (NEFT, RTGS, UPI, credit/debit cards, net banking) are excluded from cash.

Section 63 Read with Presumptive Taxation (Section 58)

| Situation | Audit Required? | |-----------|----------------| | Section 58/44AD opted, turnover up to Rs. 3 crore, income declared >= 8%/6% | No | | Section 58/44AD opted, turnover up to Rs. 3 crore, income declared < 8%/6% | Yes — since declaring lower profit triggers audit | | Section 58/44AD opted and then opted out in subsequent year | Yes — mandatory for 5 consecutive years | | Section 58/44ADA opted, gross receipts up to Rs. 75 lakh, income >= 50% | No | | Section 58/44ADA opted, gross receipts up to Rs. 75 lakh, income < 50% | Yes |

Audit Report Forms

Form 3CA — Audit Report (Already Audited Under Other Law)

Form 3CA is used when the taxpayer's accounts are already required to be audited under any other law (e.g., Companies Act, 2013 for companies; cooperative society acts; banking regulation). The statutory auditor or the tax auditor (if different) issues Form 3CA along with Form 3CD.

Form 3CB — Audit Report (Not Audited Under Other Law)

Form 3CB is used for persons whose accounts are not required to be audited under any other law (e.g., partnership firms, proprietorships, LLPs not covered by LLP Act audit requirement). The tax auditor issues Form 3CB along with Form 3CD.

Form 3CD — Statement of Particulars (44 Clauses)

Form 3CD is the detailed statement that accompanies either Form 3CA or 3CB. It contains 44 clauses covering every critical aspect of the taxpayer's financial and compliance profile.

Key Clauses of Form 3CD

| Clause | Subject | Key Requirement | |--------|---------|----------------| | 1-4 | Basic details | Name, address, PAN, status, Tax Year | | 8(a)-(b) | Presumptive income | Whether Section 58 (44AD/44ADA/44AE/44B etc.) applied | | 9(a)-(c) | Partners' details | Names, profit sharing ratio, capital, remuneration, interest | | 11 | Books of account | List of books maintained, nature of business | | 12 | Depreciation | WDV, additions, deletions, depreciation rates (Rule 5) | | 13-14 | Capital/personal expenses | Amounts debited but not allowable | | 17-20 | Expenditure provisions | Section 36 (formerly 40(a)(ia), 40A(2), 40A(3)) cash payments > Rs. 10,000 | | 21 | Deemed income | Recovery, balancing charge, etc. | | 26 | TDS/TCS compliance | Amounts on which TDS not deducted or short deducted (under Sections 392-394) | | 27 | Section 185/188 (formerly 269SS/269T) | Cash loans/repayments exceeding Rs. 20,000 | | 29 | Deductions claimed | Chapter VIII deduction details | | 30-30C | Filing compliance | ITR filed, date, acknowledgement number for preceding years | | 31 | GAAR | Whether arrangement attracts General Anti-Avoidance Rules (Section 178-181) | | 34 | GST details | GST registration status, turnover comparison with GST returns | | 36A | Section 37 (formerly 43B) | Deductions allowable only on payment basis | | 40-44 | Reporting additions | MSME delayed payments, virtual digital assets, etc. |

Due Date and Filing

| Parameter | Detail | |-----------|--------| | Due date | 30 September of the Assessment Year | | Filing mode | Electronically through the e-filing portal | | Digital signature | Mandatory for the CA signing the report | | Penalty for non-filing | Section 446 (formerly 271B) — penalty of 0.5% of turnover or Rs. 1,50,000, whichever is lower | | Revision | Tax audit report can be revised before the return filing due date with valid reasons |

Section 206 — Minimum Alternate Tax (MAT) for Companies

Rationale

MAT under Section 206 of the Income Tax Act, 2025 (formerly Section 115JB of the Income Tax Act, 1961) was introduced to bring "zero tax companies" — companies showing book profits and declaring dividends but paying no income tax due to various deductions, exemptions, and depreciation provisions — into the tax net.

Computation of Book Profit

The starting point is the net profit as shown in the Profit & Loss Account prepared under the Companies Act, 2013. This is then adjusted for specified additions and deductions under Section 206.

Additions to Net Profit

| Addition | Explanation | |----------|-------------| | Income tax paid or payable | Tax provision debited to P&L | | Amount transferred to reserves | Any transfer to any reserve | | Dividend paid or proposed | Amount of dividend paid or proposed | | Depreciation debited | Depreciation as per books (replaced by depreciation under Section 206) | | Deferred tax provision | Provision for deferred tax and deferred tax liability debited to P&L | | Provision for unascertained liabilities | Amount set aside as provision for diminution in value of any asset | | Expenditure related to exempt income | Amount of expenditure relatable to income to which Section 11 + Schedules applies | | Amount of loss brought forward/unabsorbed depreciation | Whichever is lower, as per books |

Deductions from Net Profit

| Deduction | Explanation | |-----------|-------------| | Withdrawal from reserves | Amount withdrawn from reserves if credited to P&L | | Exempt income | Income to which Section 11 + Schedules applies | | Depreciation (excluding revaluation) | Lower of depreciation as per books or depreciation under the Act (excluding depreciation on revalued assets) | | Amount of loss brought forward/unabsorbed depreciation | Whichever is lower, as per books | | Deferred tax credit | If deferred tax asset is credited to P&L | | Profit of SEZ unit | Profit of unit in SEZ from the year it begins manufacturing |

MAT Rate and Computation

| Parameter | Detail | |-----------|--------| | MAT rate | 15% of book profit | | Surcharge | As applicable (7%/12% based on income range) | | Health & Education Cess | 4% | | Effective rate (approximate) | 15.756% to 17.472% depending on surcharge slab |

If the tax payable under normal provisions is less than 15% of book profit, the company must pay MAT (i.e., 15% of book profit becomes the minimum tax).

MAT Credit — Section 206

The excess of MAT paid over the tax payable under normal provisions is available as MAT credit under Section 206 of the Income Tax Act, 2025 (formerly Section 115JAA). This credit can be carried forward and set off against the excess of normal tax liability over MAT liability in subsequent years.

| Parameter | Detail | |-----------|--------| | Credit amount | MAT paid minus tax payable under normal provisions | | Carry forward period | 15 years from the assessment year in which the credit arises | | Set-off | Against the excess of tax under normal provisions over MAT in subsequent years | | Interest | No interest is payable on MAT credit |

Form 29B — MAT Report

Every company to which Section 206 applies must obtain a report from a Chartered Accountant in Form 29B, certifying that the book profit has been computed correctly. Form 29B must be filed electronically before the due date for filing the return of income.

Rule 40B of the Income Tax Rules, 2026 (formerly Rule 40B of the Income Tax Rules, 1962) prescribes the detailed methodology for computing book profit adjustments, including the treatment of revaluation reserves, depreciation on revalued assets, and provisions for diminution.

Alternate Minimum Tax (AMT) for Non-Corporate Taxpayers — Section 206

Applicability

AMT provisions within Section 206 of the Income Tax Act, 2025 (formerly Section 115JC) apply to every person other than a company (individuals, HUFs, firms, AOPs, BOIs, LLPs) who has claimed deduction under:

• Chapter VIII under the heading "C" — deductions in respect of certain incomes (Sections relating to certain business incomes), OR
• Special Economic Zone unit deductions, OR
• Section 46 (formerly Section 35AD) (specified business deduction)

Exemption for Small Taxpayers

AMT provisions do not apply if the adjusted total income of the person does not exceed Rs. 20 lakh during the Tax Year. This carve-out ensures that small taxpayers are not burdened with the AMT compliance.

Computation of AMT

| Step | Detail | |------|--------| | 1 | Compute total income under regular provisions | | 2 | Compute adjusted total income: Total income + deductions under Chapter VIII (heading C) + SEZ unit deduction + Section 46 deduction (minus depreciation under Section 33) | | 3 | Compute AMT: 18.5% of adjusted total income | | 4 | If tax on total income under normal provisions < AMT, the AMT becomes the tax payable |

AMT Credit — Section 206

Similar to MAT credit, the excess of AMT paid over the regular tax is available as AMT credit under Section 206 of the Income Tax Act, 2025 (formerly Section 115JD).

| Parameter | Detail | |-----------|--------| | Credit amount | AMT paid minus tax payable under normal provisions | | Carry forward period | 15 years | | Set-off | Against excess of regular tax over AMT in subsequent years | | Cannot reduce below AMT | Credit cannot be set off to reduce tax below the AMT for that year |

Form 29C — AMT Report

Every person to whom the AMT provisions apply must obtain a report from a Chartered Accountant in Form 29C certifying that the adjusted total income and AMT have been computed correctly. Form 29C must be filed electronically before the due date for filing the return.

Landmark Judgement

Worked Example — MAT Credit Calculation Over 3 Years

Scenario: XYZ Pvt. Ltd. has the following tax positions for AY 2024-25, AY 2025-26, and AY 2026-27:

Year-wise Computation

| Particulars | AY 2024-25 (Rs.) | AY 2025-26 (Rs.) | AY 2026-27 (Rs.) | |-------------|-----------------|-----------------|-----------------| | Book Profit | 1,00,00,000 | 80,00,000 | 1,50,00,000 | | MAT @ 15% | 15,00,000 | 12,00,000 | 22,50,000 | | Total Income (Normal) | 60,00,000 | 50,00,000 | 2,00,00,000 | | Tax under normal provisions @ 25% | 15,00,000 | 12,50,000 | 50,00,000 |

AY 2024-25

| Step | Amount (Rs.) | |------|-------------| | Tax under normal provisions | 15,00,000 | | MAT (15% of Rs. 1,00,00,000) | 15,00,000 | | Tax payable | 15,00,000 (both are equal) | | MAT credit generated | Nil (MAT = Normal tax) |

AY 2025-26

| Step | Amount (Rs.) | |------|-------------| | Tax under normal provisions | 12,50,000 | | MAT (15% of Rs. 80,00,000) | 12,00,000 | | Normal tax > MAT, so tax payable under normal provisions | 12,50,000 | | MAT credit generated | Nil (Normal tax > MAT, no MAT was paid) |

AY 2026-27

| Step | Amount (Rs.) | |------|-------------| | Tax under normal provisions | 50,00,000 | | MAT (15% of Rs. 1,50,00,000) | 22,50,000 | | Normal tax > MAT | Tax payable under normal provisions: 50,00,000 | | MAT credit available from prior years | Nil (no credit was generated in AY 2024-25 or 2025-26) | | Final tax payable | 50,00,000 |

Now consider a modified scenario where MAT credit is generated:

| Particulars | AY 2024-25 (Rs.) | AY 2025-26 (Rs.) | AY 2026-27 (Rs.) | |-------------|-----------------|-----------------|-----------------| | Book Profit | 2,00,00,000 | 1,80,00,000 | 1,50,00,000 | | MAT @ 15% | 30,00,000 | 27,00,000 | 22,50,000 | | Total Income (Normal) | 80,00,000 | 70,00,000 | 2,00,00,000 | | Tax under normal provisions @ 25% | 20,00,000 | 17,50,000 | 50,00,000 |

AY 2024-25: MAT (Rs. 30,00,000) > Normal tax (Rs. 20,00,000). Tax payable = Rs. 30,00,000. MAT credit = Rs. 10,00,000.

AY 2025-26: MAT (Rs. 27,00,000) > Normal tax (Rs. 17,50,000). Tax payable = Rs. 27,00,000. MAT credit generated = Rs. 9,50,000. Cumulative credit = Rs. 19,50,000.

AY 2026-27: Normal tax (Rs. 50,00,000) > MAT (Rs. 22,50,000). Excess = Rs. 27,50,000. MAT credit available = Rs. 19,50,000. Set-off: Rs. 19,50,000 (but cannot reduce tax below MAT of Rs. 22,50,000). Tax after MAT credit = Rs. 50,00,000 - Rs. 19,50,000 = Rs. 30,50,000. (This exceeds MAT of Rs. 22,50,000, so full credit is utilised.)

Net saving from MAT credit in AY 2026-27 = Rs. 19,50,000.

Expert Tip: Tax audit under Section 63 is not just a compliance formality — a thorough Form 3CD is your first line of defence in any scrutiny assessment. Ensure Clause 26 (TDS/TCS defaults under Sections 392-394) is reviewed meticulously, as mismatches trigger automatic Section 270(1) adjustments. For MAT purposes, ensure the P&L Account is prepared strictly in accordance with Schedule III of the Companies Act, 2013 and applicable Indian Accounting Standards (Ind AS). Any deviation gives the AO grounds to reject the P&L and recompute book profit under Section 206. File Form 29B/29C well before the return filing deadline — late filing of these forms has been a common ground for disallowing MAT credit claims.

Section Interconnect

• Chapter 5 — Business & Profession (Sections 26-66): Section 63 is triggered by turnover/receipts from business or profession. Presumptive taxation under Section 58 (formerly Sections 44AD/44ADA) directly impacts whether audit is required.
• Chapter 16 — Returns & Filing (Section 263): The tax audit due date (30 September) precedes the return filing due date for audit cases (31 October). Audit report must be uploaded before the return.
• Chapter 11 — Assessment & Scrutiny (Sections 270-282): Tax audit findings in Form 3CD are the starting point for the AO during scrutiny assessment under Section 270(9).
• Chapter 13 — Penalties & Prosecution (Sections 439-479): Penalty under Section 446 for failure to get tax audit is 0.5% of turnover or Rs. 1,50,000, whichever is lower.

Frequently Asked Questions

1. Can the same CA be the statutory auditor and tax auditor?

Yes, for companies, the statutory auditor appointed under the Companies Act can also conduct the tax audit under Section 63 and issue Form 3CA/3CD. However, for good governance, many companies appoint separate auditors. For non-companies (firms, proprietors), the tax auditor issues Form 3CB/3CD, and there is no restriction on the same CA performing both functions.

2. If my business turnover is Rs. 1.2 crore but all transactions are digital (no cash), do I need a tax audit?

If your cash receipts are below 5% of total receipts and cash payments are below 5% of total payments, the threshold is Rs. 10 crore (not Rs. 1 crore). Since your turnover (Rs. 1.2 crore) is below Rs. 10 crore and transactions are entirely digital, no tax audit is required under Section 63, provided you are not covered under any other clause (like opting out of presumptive taxation under Section 58).

3. What happens if I file the tax audit report after 30 September?

A penalty under Section 446 (formerly Section 271B) can be levied: 0.5% of total sales/turnover/gross receipts, or Rs. 1,50,000, whichever is lower. However, if you demonstrate reasonable cause for the delay (e.g., auditor's illness, natural disaster, technical portal issues), the penalty can be waived. The return filing due date (31 October) is linked to audit completion — late audit often means late return, attracting additional fees under Sections 423 and 428.

4. Does MAT apply to a company that has incurred losses as per books?

If a company has a net loss in the P&L Account, the book profit after Section 206 adjustments may still be positive (e.g., if provisions for unascertained liabilities, deferred tax provisions, or depreciation are added back). If the adjusted book profit is positive, MAT applies at 15%. If the adjusted book profit is also nil or negative, no MAT is payable. Form 29B must still be filed if the company is otherwise covered by Section 206 provisions.

5. Is AMT applicable to an individual taxpayer claiming only Section 123 (80C equivalent) deductions?

No. AMT under Section 206 applies only if the taxpayer claims deductions under heading C of Chapter VIII (relating to certain incomes), or SEZ unit deductions, or Section 46 (specified business). Deductions under Sections 123 (80C), 126 (80D), 129 (80E), 133 (80G), 153 (80TTA/80TTB), etc. do not trigger AMT. Additionally, even if AMT is triggered, it does not apply if adjusted total income is below Rs. 20 lakh.

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