Income Tax Audit Section 44AB (AY 2026-27): Turnover Thresholds, Forms 3CA-3CD, Due Dates & Section 271B Penalties

Official guide to Section 44AB Tax Audits: ₹10 Crore digital transaction threshold, presumptive taxation rules (44AD & 44ADA), Form 3CA vs 3CB differences, deadlines, and penalty waivers.

GBy GST Munshi Tax Law Research Group•Published: September 20, 2026•11 min read•30K views•1 reading now
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Income Tax Audit Section 44AB Rules, Limits, and Penalties
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Quick Answer & Key Takeaways

Quick Summary & Key Takeaways (Featured Snippet)

Section 44AB of the Income Tax Act mandates that every business with annual turnover exceeding ₹1 Crore (or ₹10 Crore where cash transactions do not exceed 5%) and professionals with gross receipts exceeding ₹50 Lakhs (₹75 Lakhs under 44ADA) must have their accounts audited by a practicing Chartered Accountant and upload Form 3CA/3CB and Form 3CD before the statutory deadline.
Business Limit (Digital 95%+): ₹10 Crore Turnover Threshold
Standard Business Limit: ₹1 Crore Turnover Threshold
Professional Limit (44ADA): ₹50 Lakhs / ₹75 Lakhs
Statutory Filing Deadline: September 30 of the Assessment Year

What Is an Income Tax Audit under Section 44AB?

A Tax Audit under Section 44AB is an examination of an assessee's books of account to verify the accuracy of financial statements, ensure compliance with income tax provisions, and prevent tax evasion. The audit must be conducted by an independent practicing Chartered Accountant holding a valid Certificate of Practice (COP).

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Statutory Turnover Thresholds for Tax Audit (AY 2026-27)

CategoryStandard Turnover ThresholdEnhanced Digital Threshold (≤5% Cash)Presumptive Taxation Condition
Commercial BusinessesExceeding ₹1 CroreExceeding ₹10 CroreIf turnover is up to ₹2 Cr (or ₹3 Cr if cash ≤ 5%) and declaring ≥ 6% / 8% profit under Sec 44AD, no audit is required.
Specified ProfessionalsExceeding ₹50 LakhsExceeding ₹75 LakhsUnder Sec 44ADA, if gross receipts are ≤ ₹75 Lakhs and net profit is declared ≥ 50%, audit is exempt.
Opting Out of 44ADExceeding Basic ExemptionN/AIf an assessee opts out of Sec 44AD within 5 consecutive years and profit is below taxable limit, audit is mandatory.

Understanding the 5% Cash Condition for ₹10 Crore Exemption

To qualify for the elevated ₹10 Crore threshold, an enterprise must satisfy both of the following dual criteria during the relevant financial year:

  1. Receipts Test: The aggregate of all cash receipts (including sales, turnover, loans, deposits, and capital introduced) must not exceed 5% of aggregate receipts.
  2. Payments Test: The aggregate of all cash payments (including business expenditures, asset purchases, loan repayments, and drawings) must not exceed 5% of aggregate payments.

Form 3CA vs Form 3CB vs Form 3CD Comparison

Form 3CA (Statutory Audit Exists)

Applicable when the books of account of the person carrying on business or profession have been audited under any other statute (e.g., corporate balance sheet audit under the Companies Act, 2013).

Attached with Form 3CD Annexure

Form 3CB (No Other Statutory Audit)

Applicable for assessees whose accounts are not required to be audited under any other law (e.g., Sole Proprietorships, LLPs not crossing LLP audit limits, and Partnership firms).

Attached with Form 3CD Annexure

Statutory Due Dates & Penalties under Section 271B

  • Audit Report Submission Due Date: September 30 of the relevant Assessment Year (for non-transfer pricing cases).
  • Income Tax Return (ITR-6 / ITR-5 / ITR-3) Due Date: October 31 of the Assessment Year.
  • Transfer Pricing (Form 3CEB) Due Date: October 31 for the report, and November 30 for the ITR.
Section 271B Penalty Formula

If an assessee fails to upload the tax audit report by September 30, the Assessing Officer may levy a penalty equal to:
Lower of:
(a) 0.5% of total sales, turnover, or gross receipts, OR
(b) ₹1,50,000 (One Lakh Fifty Thousand Rupees).

Frequently Asked Questions

Can Section 271B penalties be waived under Section 273B?

Yes. Under Section 273B, no penalty shall be imposable under Section 271B if the assessee proves that there was a reasonable cause for the failure, such as natural calamities, severe illness of the auditor/assessee, or portal technical glitches officially acknowledged by the CBDT.

How does a taxpayer assign a Chartered Accountant on the Income Tax Portal?

Log in to incometax.gov.in, navigate to 'Authorised Partners' > 'My Chartered Accountant' > 'Add CA'. Enter the CA's Membership Number, select the relevant form (Form 3CA-3CD or 3CB-3CD) and the Assessment Year. Once the CA uploads the report with their digital signature (DSC), the taxpayer must log in and 'Accept' the submission.

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