Tax Audit Deadline Today: 21 Oct Checklist & Penalties

If your accounts need a tax audit for FY 2025-26, today — Wednesday 21 October 2026 — is the day the report must be furnished. This guide covers who it applies to, the pre-upload checklist, the cost of missing today, and the road to the 21 November return. Most important first: as of today, the CBDT has issued no further extension beyond 21 October 2026. Work to today's deadline.

Quick Answer

For Assessment Year 2026-27, the tax audit report deadline is today, 21 October 2026, for businesses and professionals whose accounts must be audited under Section 44AB, per CBDT Circular No. 07/2026. Missing it can attract a Section 271B penalty of the lesser of 0.5% of turnover and ₹1,50,000, and delays the return due 21 November 2026.

What today, 21 October, actually is

Today is the "specified date" for the tax audit report for Assessment Year 2026-27 (FY 2025-26, ended 31 March 2026). A chartered accountant must have uploaded the report — Form 3CA or 3CB, with Form 3CD — on the e-filing portal, and the taxpayer must have accepted it there. The two dates at a glance: - Tax audit report (Form 3CA or 3CB with Form 3CD) — due today, 21 October 2026. Original date: 30 September 2026. - Return of income for audit cases — due 21 November 2026. Original date: 31 October 2026. - Both dates were moved by CBDT Circular No. 07/2026, dated 28 September 2026 — each by 21 days. - The audit report comes first: the return cannot be completed until the audited figures are final.

Who must file today

Section 44AB of the 1961 Act sets the triggers: - Business with turnover above ₹1 crore in FY 2025-26. - Business with turnover above ₹10 crore, but only if BOTH cash receipts and cash payments are each 5% or less of the respective totals (otherwise the ₹1 crore limit applies; non-account-payee cheques/drafts count as cash). - Professionals with gross receipts above ₹50 lakh in FY 2025-26. There is no higher digital-transactions threshold for professionals. - Presumptive-scheme cases declaring profit below the presumptive rate where total income exceeds the basic exemption limit — under Section 44AD (including the 44AD(4) lock-in) or Section 44ADA (below 50% of gross receipts). - Companies, firms and LLPs whose accounts must be audited. Keep two figures distinct: ₹75 lakh is the enhanced presumptive-tax eligibility limit under Section 44ADA (cash receipts 5% or less of gross receipts), NOT the audit trigger, which remains gross receipts above ₹50 lakh under Section 44AB. If unsure, ask your chartered accountant.

Who is NOT covered by today's deadline

Circular No. 07/2026 covers only serial number 2 of the table below Explanation 2 to Section 139(1) — companies, taxpayers whose accounts must be audited, and certain partners of such firms: - Salaried individuals and other non-audit filers: dates unchanged by this circular. - Transfer-pricing cases (Section 92E): audit report and Form 3CEB by 31 October 2026, return by 30 November 2026. - Other forms the circular does not name (10B/10BB, 29B, 10CCB): do not assume those dates moved. If no trigger applies to you, no report is due today.

Last-day checklist: what to do today

Keep written proof of each step. 1. Confirm with your auditor, in writing, that the report has been uploaded, and get the acknowledgement number. 2. Check the UDIN: generated by the auditor through the ICAI portal after signing off, it must match the uploaded report. A wrong UDIN can reportedly be revoked only within 48 hours, so flag errors immediately. 3. Check the Digital Signature Certificate (DSC): registered, mapped to the correct PAN, and unexpired. Test the token early — signing failures often come from unmapped or expired certificates, or emSigner not running. 4. Reconcile Form 3CD figures to the books before finalising. 5. Reconcile AIS, TIS and Form 26AS against the books, recording an explanation for any difference. 6. Tie GST figures to the books: match turnover and input tax credit with GSTR-1 and GSTR-3B. 7. Save everything in one folder today: signed financials, uploaded forms, UDIN, acknowledgement, acceptance. 8. Do not leave the upload to the last hour — the portal slows under last-minute load.

What happens if you miss today

Missing today does not remove the obligation: First, the penalty. Under Section 271B, the penalty is the lesser of 0.5% of total sales, turnover or gross receipts and ₹1,50,000: - Turnover of ₹1 crore: 0.5% is ₹50,000, so the penalty would be ₹50,000 (below the cap). - Turnover of ₹3 crore: 0.5% is ₹1,50,000, so the penalty would be ₹1,50,000 (at the cap). - Turnover of ₹10 crore: 0.5% is ₹5,00,000, but the cap applies, so the penalty would be ₹1,50,000.

Second, the penalty is not automatic. Under Section 273B, no penalty applies where reasonable cause is proved — documented illness, genuine portal failure on the last day, or a bona fide interpretation dispute. "I forgot" is not; evidence must be dated and compliance completed promptly. Third, what else you can lose. Late filing can attract Section 234A interest (1% per month or part of a month on unpaid tax) and a Section 234F fee. Worse, a belated return generally cannot carry forward business and capital losses (house property loss and unabsorbed depreciation survive) — a lost carry-forward that can cost far more than the penalty. A belated return under Section 139(4) can still be filed up to 31 December 2026 (or before assessment is completed, whichever is earlier), with a Section 234F fee of ₹5,000 (₹1,000 if total income is ₹5 lakh or less) plus interest. After that, the updated return (ITR-U) under Section 139(8A) carries additional tax and cannot claim a refund or increase a loss.

The road to 21 November: what to prepare now

The return for audit cases is due by 21 November 2026 — one month from today. Tie every Form 3CD figure to the correct schedule; settle the regime and deduction position with documents in hand; and prepare e-verification in advance, since a return not e-verified within 30 days is treated as not filed. The circular says nothing about interest — confirm the self-assessment tax position with your auditor.

Common last-day failures — and what to do about each

UDIN mismatch: UDIN should be generated after sign-off. If it does not match the report, flag it immediately. DSC not mapped or expired, or emSigner not running: verify validity and PAN mapping under Profile settings and reboot emSigner and the browser. Portal slowness or upload failures: retry after a short gap and keep dated screenshots; systemic-failure evidence supports reasonable cause only if you tried in time. AIS, TIS or 26AS mismatch at the last minute: do not force the upload past an unexplained material difference. Record it and use the AIS feedback route.

The bottom line

Today, 21 October 2026, is the tax audit report deadline for AY 2026-27 — a date to meet, not to watch. Confirm the upload and acceptance today, and use the month to 21 November 2026 for a clean, reconciled return. If you have missed today, act now and preserve evidence of any reasonable cause before the 31 December 2026 belated window closes. Do not plan around a further extension — as of today, there is none. This article is for educational purposes only and is not financial advice. Please consult a SEBI-registered investment adviser for personalized guidance. Investments are subject to market risk. Tax rules change frequently; verify deadlines on incometax.gov.in before filing. Sources: CBDT Circular No. 07/2026 dated 28 September 2026 (F. No. 225/128/2026/ITA-II); TaxGuru (circular text and October 2026 compliance calendar); Kunal Darwani & Company (CBDT extension explainer); Financial Express (tax audit deadline checks and penalty explainer); ET Now (penalty and no-further-extension reporting); CareerIndia (last-minute checklist, UDIN/DSC and AIS reconciliation guidance); Legal Suvidha (belated return, Section 139(4) and Section 234F).