Tax Audit for AY 2026-27: Due Date, Recent Amendments & What Every Business Owner Must Check Before 30th September

If your business or profession is covered under Section 44AB of the Income-tax Act, 1961, the tax audit report for FY 2025-26 (Assessment Year 2026-27) is due for filing by 30th September 2026. This year’s audit cycle carries more than the usual compliance weight — CBDT has substantially revised Form 3CD through the Income-tax (Eighth Amendment) Rules, 2025 (Notification No. 23/2025 dated 28 March 2025), and taxpayers also need to understand why certain “₹75,000 penalty” headlines circulating online do not apply to this year’s audit. This article sets out, in plain terms, what has changed and what needs to be in place before the deadline.

1. Who Needs a Tax Audit for AY 2026-27

The basic thresholds under Section 44AB continue as follows for FY 2025-26:

• Business: Tax audit is mandatory where total sales/turnover/gross receipts exceed ₹1 crore. This limit is enhanced to ₹10 crore where cash receipts and cash payments each do not exceed 5% of the respective totals — effectively, where the business is substantially digital/banking-channel driven.
• Profession: Audit is mandatory where gross receipts exceed ₹50 lakh (enhanced to ₹75 lakh where cash receipts do not exceed 5% of total receipts).
• Presumptive taxation cases: If you have opted for presumptive taxation under Section 44AD, 44ADA or 44AE in earlier years and now wish to declare income below the prescribed presumptive rate, or if you have opted out of the presumptive scheme within the five-year lock-in and your income exceeds the basic exemption limit, a tax audit is triggered irrespective of turnover.
• Loss cases and other trigger situations: Businesses declaring a loss, or income below the presumptive rate, where total income exceeds the basic exemption limit, remain within the audit net even below the turnover thresholds, subject to the specific conditions of Section 44AD(4)/(5).

Practical point: Many assessees wrongly assume that crossing ₹1 crore automatically means audit, without checking the 95%-digital-transaction relaxation, or wrongly assume they are exempt at ₹1 crore without checking whether they have genuinely satisfied the digital-transaction condition on both receipts and payments. This determination should be made on actual ledger analysis, not on an assumption carried forward from the previous year.

2. Due Date Position for AY 2026-27 — No Extension as of Now

For ordinary audit cases (no transfer pricing exposure), the specified date under Section 44AB is 30th September 2026, with the consequential income-tax return due by 31st October 2026. Where a taxpayer is required to furnish a transfer pricing report under Section 92E (Form 3CEB), the audit due date extends to 31st October 2026 and the return to 30th November 2026.

Representations have been made by professional bodies seeking an extension to 31st October 2026 — as happened last year, when the AY 2025-26 tax audit deadline was moved from 30th September 2025 to 31st October 2025. However, as of the date of this article, no CBDT notification has been issued extending the AY 2026-27 deadline. A prudent professional and client should proceed on the footing that 30th September 2026 remains the operative date, and treat any extension as relief if and when actually notified — not as a planning assumption.

3. Key Form 3CD Amendments Applicable for FY 2025-26 (AY 2026-27)

CBDT’s Notification No. 23/2025 (Income-tax (Eighth Amendment) Rules, 2025), effective 1st April 2025, has reworked several clauses of Form 3CD. These apply to every audit conducted for FY 2025-26, regardless of when the audit report is actually signed. The changes that matter most in practice:

a) Clause 12 — new reporting for Section 44BBC: A presumptive taxation provision for non-resident cruise-ship operators has been inserted, with corresponding disclosure now required in Form 3CD where applicable.

b) Clause 19 — sunset provisions removed: References to certain long-expired deduction sections (relating to erstwhile investment allowance and similar phased-out provisions) have been dropped from the disallowance-reporting clause, simplifying reporting for most taxpayers.

c) Clause 21 — expenditure on settlement and compounding: Reporting has been tightened around disallowance of expenditure incurred to settle proceedings for contravention of law, consistent with the specific disallowance provision inserted in Section 37. Auditors need to specifically enquire into and obtain management representation on any settlement, compounding or penalty-related payments routed through the books.

d) Clause 22 — MSME payment disclosure (Section 43B(h)): This is the clause with the widest practical impact. Reporting now requires granular disclosure of amounts payable to micro and small enterprises that remain outstanding beyond the time limit prescribed under Section 15 of the MSMED Act, 2006 (broadly 45 days, or as per agreed credit terms not exceeding that limit), since such amounts are disallowable under Section 43B(h) on a payment basis. Practical implication for clients: vendor master data must correctly flag MSME (Udyam-registered) status, and the accounts team should be reconciling MSME ageing before the audit — this cannot be a last-week exercise.

e) Clause 26 — Section 43B disallowances generally: Reporting refined to align with the wider basket of statutory dues now covered under Section 43B, requiring clearer bifurcation of amounts paid within versus beyond the due date.

f) Clause 31 — loans, deposits and specified advances (Sections 269SS/269T): This clause now uses a structured, code-based classification for the nature of each transaction rather than free-text description. This removes auditor discretion in how a transaction is characterised and is clearly designed to enable CBDT’s system-level data-matching against AIS/Form 26AS and bank data. Cash loan/deposit transactions and repayments above the prescribed limits need to be captured with precision — approximate or bundled reporting is no longer tenable.

g) Clause 36B — new clause for share buyback receipts: Following the amendment to Section 2(22)(f) (taxing buyback proceeds as deemed dividend in the hands of shareholders, with the corresponding cost treated as a capital loss), a new Clause 36B has been inserted requiring specific reporting of amounts received by the company’s shareholders on buyback of shares under Section 115QA read with Section 2(22)(f). Closely-held companies undertaking or having undertaken buybacks need this reconciled carefully, since the tax incidence has shifted from the company (erstwhile buyback tax) to the shareholder.

h) Clause 44 — GST expenditure reporting continues: Break-up of total expenditure into GST-registered and unregistered supplier categories continues to be required, and remains a common area of cross-verification with GSTR-2A/2B and books.

4. The “₹75,000 Penalty” Confusion — What Actually Applies for AY 2026-27

Several articles and social media posts have circulated claiming a flat ₹75,000 late fee now applies for delay in furnishing the tax audit report. This needs correction:

• For AY 2026-27, the existing Section 271B framework continues to apply: penalty at 0.5% of turnover/gross receipts, capped at ₹1,50,000, imposable at the discretion of the Assessing Officer, with the reasonable-cause defence under Section 273B available in full.
• The new mandatory, fixed-fee regime (reported in public discussion as a fee under a renumbered provision — Section 428 read with Section 63 of the Income-tax Act, 2025) is intended to apply prospectively from Tax Year 2026-27 onwards, i.e., broadly corresponding to AY 2027-28, once the new Act’s audit and penalty framework comes into force from 1st April 2026 for that subsequent cycle. It does not govern the audit report being filed now for FY 2025-26/AY 2026-27.
• I would flag this precisely because getting it wrong in either direction is costly — understating the exposure by assuming “it’s just a fixed ₹75,000 either way” ignores that under the current 271B regime a genuinely reasonable cause can result in no penalty at all; overstating it by assuming the new fixed-fee regime already applies creates unnecessary client alarm this year.
• That said, this transitional year should be used to build internal processes now — MSME ageing reconciliation, cash-transaction coding, buyback documentation — because the compliance culture required will only tighten once the fixed-fee, no-discretion regime takes effect.

5. The Income-tax Act, 2025 — What It Does and Does Not Change This Year

The Income-tax Act, 2025, which replaces the Income-tax Act, 1961, has come into effect from 1st April 2026. It is important to be precise about applicability:

• Income earned during FY 2025-26 (the year under audit now) continues to be governed by the Income-tax Act, 1961. The tax audit for AY 2026-27 is still conducted, and the report still furnished, in Forms 3CA/3CB and 3CD as they presently exist — not any new consolidated form.
• Under the new Act, Section 44AB is expected to be renumbered (referenced in early commentary as Section 63), with the current three audit forms proposed to eventually consolidate into a single form. These changes are relevant to audits for FY 2026-27 onwards, not the current cycle.
• Because several of these details rest on rules and forms yet to be fully notified and tested in practice, I would treat commentary on the new Act’s audit mechanics as directional, not final, until CBDT notifies the corresponding rules and forms for that later cycle.

6. A Practical Checklist Before You Hand Over Your Books

• Reconcile turnover as per books with GSTR-3B/GSTR-9 and confirm the treatment of debit/credit notes, especially where GST turnover and income-tax turnover legitimately differ.
• Identify all MSME (Udyam-registered) vendors and age every outstanding balance against the Section 15 MSMED time limit — Section 43B(h) disallowance is now a real, tracked risk area, not a footnote.
• Classify every loan/deposit/advance transaction above ₹20,000 in cash against the Section 269SS/269T framework using the new code-based structure — do not leave this to the auditor to infer.
• If your company has undertaken a share buyback, gather the Section 115QA computation and shareholder-level disclosures required for Clause 36B.
• Reconcile TDS/TCS returns with the books and Form 26AS/AIS before the audit, not after — mismatches discovered post-audit are far more expensive to correct.
• Confirm whether the transfer pricing provisions apply to any international or specified domestic transaction — this changes your due date from 30th September to 31st October.

Bottom Line

Tax audit compliance for AY 2026-27 is not merely a paperwork exercise — the revised Form 3CD clauses on MSME payments, cash transactions and share buybacks reflect a clear regulatory push toward transaction-level, data-matched reporting. The current due date of 30th September 2026 stands as of today, and the existing Section 271B penalty regime — not the new fixed-fee structure — governs this cycle. Getting the classification, documentation and reconciliation right well before the deadline is the only way to keep the audit defensible if it is ever tested later.

This article is prepared for general professional awareness and does not constitute specific advice. Applicability depends on the precise facts of each case — please reach out for a review of your specific audit position.