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Income Tax Guide · AY 2026-27

Tax Audit Under Section 44AB —
Limit, Due Date & Penalty

When a tax audit is mandatory, the ₹1 crore / ₹10 crore / ₹50 lakh thresholds, Form 3CA/3CB/3CD, the 30 September due date and the Section 271B penalty — for AY 2026-27.

Updated for AY 2026-27 Income-tax Act, 2025 CA-Conducted Audit
Get Your Tax Audit DoneSee the limits
₹1crBusiness limit
₹10crDigital business
₹50LProfession
₹1.5LMax penalty
Quick Answer

A tax audit under Section 44AB is mandatory when business turnover exceeds ₹1 crore (raised to ₹10 crore if cash receipts and payments are each ≤ 5% of the total) or when a professional's gross receipts exceed ₹50 lakh. A practising Chartered Accountant conducts the audit and files Form 3CA/3CB + Form 3CD by 30 September 2026 for AY 2026-27.

Business ₹1 crore
Digital business ₹10 crore
Profession ₹50 lakh
Report due 30 Sep
Applicability

When Is a Tax Audit Mandatory?

Section 44AB of the Income-tax Act (renumbered under the Income-tax Act, 2025, in force from AY 2026-27) lists every case where accounts must be audited. The thresholds below apply for AY 2026-27.

Taxpayer / SituationThresholdAudit?Form
Business — normal (cash > 5%)Turnover > ₹1 croreYes3CB + 3CD
Business — digital (cash ≤ 5% of receipts & payments)Turnover > ₹10 croreYes3CB + 3CD
Profession (doctor, CA, lawyer, architect, etc.)Gross receipts > ₹50 lakhYes3CB + 3CD
Accounts already audited under other law (Companies/LLP Act)Any turnoverYes3CA + 3CD
Opted out of 44AD presumptive & income > basic exemptionAny turnoverYes3CB + 3CD
44ADA professional declaring < 50% & income > basic exemptionAny receiptsYes3CB + 3CD
Small business within limits / eligible presumptive filerBelow thresholdsNo—

The ₹10 crore limit needs BOTH cash receipts AND cash payments to be ≤ 5% of the respective totals. Verify current provisions on incometax.gov.in before filing.

The paperwork

Tax Audit Forms — 3CA, 3CB & 3CD

The audit report has two parts: an audit certificate (Form 3CA or 3CB, depending on whether accounts are audited under any other law) plus the statement of particulars in Form 3CD.

  • Form 3CA — used when the accounts are already audited under another law (e.g. Companies Act, LLP Act). The CA certifies that tax-audit requirements are met.
  • Form 3CB — used by other taxpayers (proprietors, partnership firms) whose accounts are not audited under any other law. The CA both audits and certifies.
  • Form 3CD — the detailed statement (40+ clauses): turnover, depreciation, disallowed expenses, TDS compliance, related-party dealings, loans and unexplained credits. Filed together with 3CA or 3CB.
Appoint a CAPractising Chartered Accountant
→
Audit accountsBooks, ledgers, GST & TDS data
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CA files report3CA/3CB + 3CD on the portal
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Taxpayer acceptsApprove, then file the ITR
TaxClue Insight

A tax audit is not the same as a company statutory audit. A private limited company still needs BOTH — the Companies Act statutory audit and a Section 44AB tax audit (filed on Form 3CA because accounts are already audited under the Companies Act). Plan both timelines together to avoid a September crunch.

Not sure if your accounts need a tax audit this year?

Ask a TaxClue CA →
Deadlines

Tax Audit Due Dates for AY 2026-27

For FY 2025-26 (AY 2026-27), the tax-audit report must be filed one month before the ITR due date for audit cases. See our income tax due dates page for the full calendar.

ComplianceDue Date (AY 2026-27)Applies To
Tax audit report (3CA/3CB + 3CD)30 Sep 2026All taxpayers under audit
ITR filing — audit cases31 Oct 2026Persons whose accounts are audited
ITR filing — transfer-pricing (Form 3CEB)30 Nov 2026Specified domestic / international transactions

Dates are the standard statutory deadlines and may be extended by CBDT notification. Always confirm on incometax.gov.in.

File the report before the ITR

The tax-audit report must be uploaded and accepted before you file the ITR. If the report is late, you cannot correctly file the return and expose yourself to the Section 271B penalty. Do not leave both to the last week of the month.

Non-compliance

Penalty for Not Getting a Tax Audit

If a taxpayer who is required to get accounts audited fails to do so, or fails to file the report by the due date, a penalty under Section 271B applies:

Penalty on ₹3 crore turnover

0.5% of turnover₹1,50,000
Statutory cap₹1,50,000
Penalty payable₹1,50,000

Penalty on ₹1.2 crore turnover

0.5% of turnover₹60,000
Statutory cap₹1,50,000
Penalty payable₹60,000

The penalty is 0.5% of turnover or gross receipts, subject to a maximum of ₹1,50,000 — whichever is lower. It can be waived under Section 273B if the taxpayer proves reasonable cause (e.g. death or serious illness of the auditor, or a natural calamity).

Avoiding audit

Presumptive Taxation — Skip the Audit

Small businesses and professionals can often avoid a tax audit by opting for the presumptive taxation scheme, declaring income at a prescribed rate of turnover.

Presumptive suits you if

  • Business turnover up to ₹3 crore (₹2 cr if cash > 5%) under 44AD
  • Professional receipts up to ₹75 lakh under 44ADA
  • You declare income at 6%/8% (business) or 50% (profession) or more
  • You want to skip audited books and Form 3CD

Audit is unavoidable if

  • You cross the ₹1 cr / ₹10 cr / ₹50 lakh thresholds
  • You declare lower profit than the presumptive rate and income exceeds the exemption limit
  • You are a company or need statutory audit anyway
  • You have losses to carry forward with detailed books

Confused between audit and presumptive taxation?

Compare 44AD vs 44ADA →
Government sourcesAct & forms: incometax.gov.in · Section 44AB, 271B & 273B — Income-tax Act (renumbered under the Income-tax Act, 2025) · Forms 3CA / 3CB / 3CD — filed on the e-filing portal · Presumptive schemes: Sections 44AD, 44ADA, 44AE
People also ask

Frequently Asked Questions

Limits & Applicability
What is the turnover limit for tax audit under Section 44AB?
A tax audit is required when business turnover exceeds ₹1 crore in a financial year. This limit rises to ₹10 crore where both cash receipts and cash payments are each 5% or less of the respective totals (a largely digital business). For professionals, a tax audit applies once gross receipts exceed ₹50 lakh. An audit is also triggered if a taxpayer opts out of the presumptive scheme and total income exceeds the basic exemption limit.
Is tax audit mandatory if turnover is below ₹1 crore?
Generally no. A business with turnover up to ₹1 crore does not need a tax audit, and one within the presumptive-scheme limits declaring the prescribed profit is also exempt. However, an audit becomes mandatory below the threshold if you opt out of Section 44AD presumptive taxation and your total income exceeds the basic exemption limit, or if you declare a lower profit than the presumptive rate.
What is the ₹10 crore tax audit limit?
The turnover limit for tax audit is raised from ₹1 crore to ₹10 crore for businesses where cash transactions are minimal — specifically, where aggregate cash receipts do not exceed 5% of total receipts AND aggregate cash payments do not exceed 5% of total payments. Both conditions must be met. This encourages digital transactions by exempting largely cashless businesses from audit up to ₹10 crore.
What is the tax audit limit for professionals?
Professionals such as doctors, chartered accountants, lawyers, architects, engineers and consultants must get a tax audit once gross professional receipts exceed ₹50 lakh in a financial year. Below that, a professional can opt for the Section 44ADA presumptive scheme (up to ₹75 lakh where cash receipts are within 5%) and avoid the audit.
Does a partnership firm or proprietor need a tax audit?
Yes, if it crosses the applicable Section 44AB threshold — ₹1 crore turnover (₹10 crore if cash ≤ 5%) for business, or ₹50 lakh receipts for a profession. Since the accounts of a proprietor or a partnership firm are not audited under any other law, the CA files the report in Form 3CB along with Form 3CD.
Forms & Process
Who can conduct a tax audit in India?
Only a practising Chartered Accountant (or a firm of CAs) holding a valid certificate of practice can conduct a tax audit under Section 44AB. The CA examines the books, verifies compliance and issues the report in Form 3CA or 3CB together with Form 3CD, which is uploaded on the income tax e-filing portal and then accepted by the taxpayer.
What is the difference between Form 3CA and Form 3CB?
Form 3CA is used when the taxpayer's accounts are already audited under another law — for example a company audited under the Companies Act or an LLP under the LLP Act. Form 3CB is used by taxpayers whose accounts are not audited under any other law, such as proprietors and partnership firms. In both cases the detailed particulars are reported in the accompanying Form 3CD.
What is Form 3CD in a tax audit?
Form 3CD is the statement of particulars annexed to the audit report. It has 40-plus clauses covering turnover, method of accounting, depreciation, amounts disallowed, TDS/TCS compliance, loans and deposits, related-party transactions, and unexplained cash credits. The CA reports these particulars based on the books, and the taxpayer certifies the information before the return is filed.
How is the audit report filed and accepted?
The Chartered Accountant uploads Form 3CA/3CB and Form 3CD on the income tax e-filing portal using the CA's digital signature. The taxpayer then logs in and accepts (or rejects) the uploaded report from their portal login. The report must be accepted before the income tax return for the audit case is filed.
Due Dates & Penalty
What is the tax audit due date for AY 2026-27?
For FY 2025-26 (AY 2026-27), the tax audit report in Form 3CA/3CB and Form 3CD must be filed by 30 September 2026. The income tax return for audit cases is then due by 31 October 2026. These are the standard statutory deadlines; the CBDT sometimes extends them by notification, so confirm the current date on incometax.gov.in.
What is the penalty for not getting a tax audit done?
Under Section 271B, the penalty for failing to get accounts audited or to file the report on time is 0.5% of turnover or gross receipts, subject to a maximum of ₹1,50,000 — whichever is lower. For example, on ₹1.2 crore turnover the penalty would be ₹60,000, while on ₹3 crore it caps at ₹1,50,000.
Can the tax audit penalty be waived?
Yes. Section 273B allows the Section 271B penalty to be waived if the taxpayer shows reasonable cause for the failure. Accepted causes have included death or serious illness of the auditor, resignation of the auditor, loss of records due to fire, theft or natural calamity, and delays beyond the taxpayer's control. The reasonable cause must be genuinely established before the assessing officer.
What happens if the audit report is filed late?
A late tax audit report exposes you to the Section 271B penalty of up to ₹1,50,000 and can delay the filing of your income tax return, potentially attracting late-filing fees and interest as well. Because the report must be accepted before the ITR is filed, missing the audit deadline can cascade into missing the ITR deadline too.
Related & Special Cases
Is tax audit the same as a statutory audit under the Companies Act?
No. A statutory audit under the Companies Act is done by a company's appointed auditor for company-law compliance. A tax audit under Section 44AB of the Income-tax Act is specifically for income tax purposes. A company needs both: its statutory audit, plus a tax audit reported on Form 3CA because the accounts are already audited under the Companies Act.
How can I avoid a tax audit?
Small taxpayers can avoid an audit by opting for presumptive taxation — Section 44AD for business (turnover up to ₹3 crore, ₹2 crore if cash exceeds 5%) or Section 44ADA for professionals (receipts up to ₹75 lakh) — and declaring income at or above the prescribed rate. As long as you stay within the limits and declare the presumptive profit, no tax audit or Form 3CD is required.
Did the Income-tax Act, 2025 change tax audit rules?
The Income-tax Act, 2025 replaces the 1961 Act with renumbered sections applying from AY 2026-27, but the substance of the tax audit provisions — the ₹1 crore / ₹10 crore / ₹50 lakh thresholds, Forms 3CA/3CB/3CD and the penalty framework — continues broadly unchanged. Where you see references to Section 44AB or 271B, the same obligations apply; verify the exact renumbered section on incometax.gov.in.
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