Not every business or professional who files an income tax return needs a tax audit. But once business turnover, professional gross receipts, or specific tax positions cross statutory limits, getting your books audited becomes a mandatory compliance requirement along with filing your ITR.
For financial year 2025-26 (AY 2026-27), the tax audit report for taxpayers covered by the CBDT extension is due by 21 October 2026, while the corresponding ITR is due by 21 November 2026.
This guide explains the tax audit rules for AY 2026-27: turnover limits, Section 44AB rules, presumptive taxation limits under Sections 44AD and 44ADA, Section 43B(h) reporting in Form 3CD, and a step-by-step CA checklist.
Tax Audit AY 2026-27: Important Due Dates
| Compliance Requirement | Original Due Date | Extended Due Date (AY 2026-27) | Governing Reference |
| Tax Audit Report (Taxpayers covered by CBDT extension) | 30 September 2026 | 21 October 2026 | CBDT Circular No. 07/2026 dated 28 September 2026 |
| ITR Filing (Taxpayers covered by CBDT extension) | 31 October 2026 | 21 November 2026 | Sl. No. 2, Table below Exp. 2 to Sec 139(1) |
| Section 92E Accountant’s Report (Transfer Pricing) | 31 October 2026 | 31 October 2026 (No extension) | Explanation 2 to Sec 139(1) |
| ITR Filing (Transfer Pricing cases) | 30 November 2026 | 30 November 2026 (No extension) | Explanation 2 to Sec 139(1) |
As announced by the CBDT in its press release and issued via Circular No. 07/2026 dated 28 September 2026, the due date for furnishing returns of income for AY 2026-27 has been extended from 31 October 2026 to 21 November 2026 for assessees covered under Sl. No. 2 of the table under Explanation 2 to Section 139(1). The specified date for furnishing the audit report under Section 44AB has been correspondingly extended from 30 September 2026 to 21 October 2026.
Transfer pricing cases covered by Section 92E continue to follow their separate statutory due dates.
Who Is Covered by the Extension?
The extension applies to taxpayers covered under Sl. No. 2 of the table under Explanation 2 to Section 139(1):
- Corporate assessees (companies).
- Non-corporate assessees whose accounts are required to be audited under the Income-tax Act or any other applicable law.
- Partners of a partnership firm or LLP whose accounts are subject to tax audit under Section 44AB, where Section 92E does not apply.
- Spouses of such partners if governed by Section 5A (Portuguese Civil Code).
What Is a Tax Audit?
A tax audit is a detailed review of a taxpayer’s books of account conducted by an independent practicing Chartered Accountant. Its purpose is to verify financial records, ensure compliance with the Income-tax Act, and report adjustments, disallowances, and statutory information directly to the Income Tax Department.
For AY 2026-27, the tax audit mandate is governed by Section 44AB of the Income-tax Act, 1961.
Tax Audit vs. Statutory Audit: A statutory audit is required under applicable laws such as the Companies Act, 2013, to report on the true and fair view of financial statements. A tax audit is a separate requirement under Section 44AB focused on computing taxable income, reporting statutory allowances, and identifying disallowances.
Who Needs a Tax Audit for AY 2026-27?
Applicability depends on your legal structure, total turnover or gross receipts, the proportion of cash transactions, and whether presumptive taxation schemes apply:
1. Regular Businesses (Turnover Above ₹1 Crore)
- A business must get its accounts audited if total sales, turnover, or gross receipts exceed ₹1 crore in the previous year.
- The ₹10 Crore Threshold: The audit threshold increases from ₹1 crore to ₹10 crore if:
- Total cash receipts do not exceed 5% of total receipts, and
- Total cash payments do not exceed 5% of total payments.
2. Businesses Opting for Section 44AD
Eligible resident individuals, HUFs, and partnership firms (excluding LLPs) can opt for presumptive taxation under Section 44AD if turnover is within:
- ₹2 crore in the general case.
- ₹3 crore where the amount or aggregate of amounts received in cash during the previous year does not exceed 5% of total gross receipts or turnover.
3. Professionals (Gross Receipts Above ₹50 Lakh)
- For individuals and firms engaged in specified professions (legal, medical, engineering, architectural, accountancy, technical consultancy, interior decoration), a tax audit applies if gross receipts exceed ₹50 lakh, as per the other conditions of Section 44AB.
- Under Section 44ADA, eligible professionals can report profits on a presumptive basis where gross receipts do not exceed ₹50 lakh, or ₹75 lakh where cash receipts do not exceed 5% of total gross receipts.
Section 44AD vs. Section 44ADA: Special Audit Scenarios
Turnover alone doesn’t decide whether you need a tax audit. Changing your tax method or reporting lower profits can also make a tax audit mandatory:
Section 44AD and the 5-Year Lock-in Rule (Section 44AB(e))
Under Section 44AD(4), if an eligible taxpayer chooses presumptive taxation and later opts out within the next five assessment years by declaring profits below the presumptive rates:
- The taxpayer becomes ineligible to opt for Section 44AD for the following 5 assessment years.
- Under Section 44AB(e), they are required to undergo a tax audit during those five ineligible years if their total income exceeds the basic exemption limit.
Section 44ADA Profit Reductions (Section 44ADA(4))
Section 44ADA allows eligible professionals to declare 50% of gross receipts as presumptive income.
If an eligible professional declares profits lower than the amount deemed under Section 44ADA(1), and their total income exceeds the maximum amount not chargeable to tax, Section 44ADA(4), read with Section 44AB(d), applies.
In such cases, they must maintain the required books of account under Section 44AA and get their accounts audited under Section 44AB.
₹3 Crore Limit vs. ₹10 Crore Limit: The Differences
| Parameter | ₹3 Crore Threshold | ₹10 Crore Threshold |
| Applicable Section | Section 44AD | Section 44AB |
| Eligible Category | Eligible resident individuals, HUFs, partnership firms (no LLPs) | Persons carrying on business, subject to Section 44AB |
| Cash Receipts Rule | Cash receipts ≤ 5% of total gross receipts or turnover | Aggregate cash receipts ≤ 5% of total receipts |
| Cash Payments Rule | Not applicable | Aggregate cash payments ≤ 5% of total payments |
| Compliance Purpose | Higher turnover threshold under presumptive taxation | Higher threshold for tax audit applicability |
Section 43B(h): MSME Payment Rules and Form 3CD Reporting
Under Section 43B(h), if a payment to an eligible micro or small enterprise remains unpaid beyond the time limit specified under Section 15 of the MSMED Act, 2006, the amount cannot be claimed as a deduction for that previous year. The deduction can be claimed in the year the payment is actually made.
Statutory Timelines:
- With written agreement: Payment must be made within the agreed period, not exceeding 45 days.
- Without written agreement: Payment must be made within 15 days.
Reporting in Form 3CD: Under the official validation rules, amounts disallowed under Section 43B(h) are reported under Clause 26(A)(a). Interest that is not allowed as a deduction under Section 23 of the MSMED Act is reported under Clause 22. Other specified Section 43B liabilities, such as those covered under clauses (a) to (g), are reported under the relevant parts of Clause 26.
Does Section 43B(h) Apply to Wholesale and Retail Traders?
Retail and wholesale traders can register on the Udyam Registration Portal as MSMEs. However, the Ministry of MSME has clarified that benefits available to retail and wholesale trade MSMEs under the relevant 2021 inclusion are restricted to Priority Sector Lending.
Therefore, Udyam registration alone should not be treated as conclusive evidence that a supplier is covered by the delayed-payment provisions under Sections 15 to 23 of the MSMED Act for Section 43B(h) purposes. The supplier’s eligibility under the MSMED Act and the nature of the transaction should be verified before applying disallowances. Also, Section 43B(h) applies specifically to micro and small enterprises, not medium enterprises.
Form 3CA, 3CB & 3CD: Which Tax Audit Form Should You Use?
When an audit is required under Section 44AB, the CA submits the audit report electronically:
- Form 3CA: Used when the taxpayer’s accounts have already been audited under another law (such as companies audited under the Companies Act, 2013).
- Form 3CB: Used when the taxpayer’s accounts are not required to be audited under any other law (such as sole proprietorships or partnership firms audited under Section 44AB).
- Form 3CD: The statement of particulars required under Section 44AB and attached to Form 3CA or Form 3CB. It contains the prescribed clause-wise financial and tax-related information required for tax-audit reporting.
Documents Required for a Tax Audit
A Chartered Accountant will typically require:
- Trial balance, profit and loss account, and balance sheet
- Bank statements and cash book
- Sales, purchase, and expense records
- Fixed asset register and loan statements
- GST returns (GSTR-1, GSTR-3B, and GSTR-9 where applicable) and TDS/TCS returns
- MSME/Udyam certificates of suppliers and statutory dues records
- Previous year’s ITR and tax audit report
- Schedules and particulars required for Form 3CD disclosures
The exact documents may vary based on the taxpayer’s business and tax requirements. If you want to learn more about these documents and tax compliance, you can consider joining an accounting and tax course.
CA Tax Audit Checklist for AY 2026-27
Before submitting Form 3CD, verify the following core areas:
- Books and Basic Information:
- Verify PAN, nature of business/profession, and accounting methods.
- Reconcile the general ledger, trial balance, and financial statements.
- Turnover & Receipts:
- Compare and verify turnover with the books of accounts and applicable GST returns, such as GSTR-1 and GSTR-9, where applicable.
- Check advances, cash receipts, and other operating income.
- Cash Transactions:
- Calculate the specified total cash receipts and cash payments to check whether the 5% condition for the ₹10 crore threshold is satisfied.
- Presumptive Taxation Reviews:
Verify turnover limits under Section 44AD (₹2 crore / ₹3 crore) or Section 44ADA (₹50 lakh / ₹75 lakh).- Check previous years for any Section 44AD(4) opt-out restrictions.
- Review cases where profits are declared below presumptive amounts.
- MSME Creditor Status:
- Identify micro and small enterprise suppliers and check Udyam registration details.
- Review written agreements to confirm applicable 15-day or 45-day payment timelines.
- Map Section 43B(h) disallowances to Clause 26(A)(a) and inadmissible MSME interest to Clause 22.
- TDS & TCS Compliance:
- Verify deductions and collections against books and portal filings.
- Identify 30% expenditure disallowances under Section 40(a)(ia) for non-deduction or late deposit.
- Key Form 3CD Clauses:
- Clause 30C: Impermissible avoidance arrangements (GAAR).
- Clause 31: Loans, deposits, and specified sums covered by Sections 269SS and 269T.
- Clause 44: Break-up of total expenditure between GST-registered and unregistered entities.
Penalty for Default Under Section 271B
Failure to get the accounts audited or furnish the tax audit report as required under Section 44AB may attract a penalty under Section 271B, subject to the reasonable-cause relief provided under Section 273B.
Penalty = Lower of 0.5% of total sales, turnover, or gross receipts, or ₹1,50,000
Relief under Section 273B: If the taxpayer proves there was reasonable cause for the failure (such as natural calamities, severe illness, or documented technical portal issues), the penalty may not be imposed.
Transition to Form 26 for FY 2026-27
For the current filing cycle (FY 2025-26 / AY 2026-27), tax audit reporting continues under Section 44AB of the Income-tax Act, 1961, using Forms 3CA, 3CB, and 3CD.
From FY 2026-27 / Tax Year 2026-27, the Income Tax Act, 2025 will come into effect. Under the new framework, Section 63 corresponds to the tax-audit provision under Section 44AB, and a unified Form 26 will replace Forms 3CA, 3CB, and 3CD.
Form 26 does not apply to AY 2026-27 filings.
FAQs
What is the tax audit due date for AY 2026-27?
For taxpayers covered by the CBDT extension, the tax audit report is due by 21 October 2026, and the ITR is due by 21 November 2026. For transfer pricing cases, the Section 92E report is due by 31 October 2026, and the ITR is due by 30 November 2026.
Where is Section 43B(h) reported in Form 3CD?
Under the official validation rules for AY 2026-27, amounts disallowable under Section 43B(h) are reported under Clause 26(A)(a) of Form 3CD. Inadmissible interest under Section 23 of the MSMED Act is reported separately under Clause 22.
Does Section 43B(h) apply to wholesale and retail traders?
Retail and wholesale traders can register on the Udyam portal, but the benefits are limited to Priority Sector Lending. Udyam registration alone should not automatically be treated as conclusive proof that a supplier is covered for every purpose under Sections 15 to 23 of the MSMED Act. The supplier’s manufacturing or service eligibility should be verified before applying Section 43B(h).
Does a professional earning ₹30 lakh who declares a 30% profit need a tax audit?
Not necessarily. If the professional is eligible for Section 44ADA and declares profits below the prescribed 50% of gross receipts, the audit requirement under Section 44ADA(4) applies if their total income exceeds the maximum amount not chargeable to income tax.
Therefore, gross receipts of ₹30 lakh alone do not decide whether a tax audit is required. The applicable books-of-account requirements under Section 44AA must also be considered.
What are Forms 3CA, 3CB, and 3CD?
Form 3CA is used when the accounts are already audited under any other law, while Form 3CB is used when the accounts are not required to be audited under any other law. Both forms are submitted along with Form 3CD, which contains the required clause-wise tax particulars.
Does Form 26 apply to AY 2026-27?
No. For FY 2025-26 / AY 2026-27, tax audits continue under the Income-tax Act, 1961, using Forms 3CA, 3CB, and 3CD. Form 26 applies to tax audits for Tax Year 2026-27 under the Income-tax Act, 2025.
