Tax Audit Due Date AY 2026-27: Section 44AB Applicability, Form 3CD Prep & Penalty for Missing It

TL;DR Summary

Tax audit due date: 30 September 2026. ITR due date: 31 October 2026.Business turnover above ₹1 crore triggers a tax audit. ₹10 crore limit applies if cash receipts and payments are under 5%. Professionals with gross receipts above ₹50 lakh need a tax audit. AY 2026-27 is a transition year. You still file under the old Income Tax Act, 1961, not the new one. Start gathering documents now. Bank statements, GST returns, and TDS certificates take time to reconcile. Penalty for missing the audit deadline: 0.5% of turnover, capped at ₹1.5 lakh. Plus late fees and interest. Tax audit and statutory audit are separate. Companies need both.

The tax audit due date for AY 2026-27 falls on 30 September 2026. If your business or profession exceeds the threshold specified under Section 44AB, meeting this deadline is essential, as it sets the course for your remaining compliance obligations during the year.

This post covers the key tax audit deadlines for AY 2026–27 and explains who is required to undergo a tax audit under the applicable provisions. It also highlights the changes under the new Income-tax Act, outlines the documents auditors typically require, and clarifies how a tax audit differs from a statutory audit for companies.

Tax Audit Due Date for AY 2026-27 – Key Dates at a Glance

For FY 2025-26, assessed as AY 2026-27, the tax audit report under Section 44AB must be filed electronically on the income-tax e-filing portal by 30 September 2026. 

This is the date your CA needs to have Form 3CA-3CD or Form 3CB-3CD, whichever applies to you, uploaded and accepted on the portal.

Once the audit report is in, your income tax return follows. For most taxpayers required to get a tax audit, the ITR due date is 31 October 2026. If your business or profession also has international transactions or specified domestic transactions covered under Section 92E, the timeline shifts further out: Form 3CEB (the transfer pricing report) is due by 31 October 2026, and your ITR filing deadline extends to 30 November 2026.

Here’s what you need to know:

Category	Audit report due date	ITR due date
Salaried individuals and other non-audit cases (ITR-1, ITR-2)	Not applicable	31 July 2026
Non-audit business or professional returns (ITR-3, ITR-4)	Not applicable	31 August 2026
Taxpayers requiring audit under Section 44AB	30 September 2026	31 October 2026
Companies requiring tax audit	30 September 2026	31 October 2026
Taxpayers with transfer pricing report (Form 3CEB)	31 October 2026	30 November 2026

So, the audit report is due one month before your ITR. If you miss 30 September, you cannot file your ITR by 31 October because the audit report is a mandatory attachment.

For transfer pricing cases, the audit report (Form 3CEB) is due 31 October 2026, and the ITR is due 30 November 2026

A few things to remember:

• No automatic extension: The CBDT may extend deadlines in some years, but do not assume an extension will come. Plan for 30 September and 31 October.
• Late filing fees: Filing your ITR after 31 October attracts a fee of ₹5,000 under Section 234F (or ₹1,000 if your total income is below ₹5 lakh).
• Interest on unpaid tax: If you have outstanding tax liability, delay also means interest under Sections 234A, 234B, and 234C.
• Loss of carry-forward: Miss the due date and you lose the ability to carry forward business losses to future years.

Your AY 2026–27 turnover is for income earned between 1 April 2025 and 31 March 2026. If you’re unsure which financial year your figures belong to, clarify that with your CA before discussing an audit.

Who is Required to Get a Tax Audit Under Section 44AB

Not every business or professional needs a tax audit. Section 44AB of the Income Tax Act, 1961 sets clear thresholds. Here is who must get one for AY 2026-27 (FY 2025-26):

Category	Basic threshold	Relaxed threshold (digital transactions)
Business	Turnover above ₹1 crore	₹10 crore, if cash receipts and cash payments are each 5% or less of total transactions
Profession	Gross receipts above ₹50 lakh	No relaxation available

Tax Audit for Businesses

If you run a business, a tax audit becomes mandatory once your total sales, turnover, or gross receipts exceed ₹1 crore in the previous year. 

However, there is an important exception. If both of these conditions are met, the threshold rises to ₹10 crore:

• Aggregate cash receipts are 5% or less of total receipts during the year
• Aggregate cash payments are 5% or less of total payments

Both conditions need to hold. If either cash test fails, you fall back to the ₹1 crore threshold, even if the other one passes comfortably.

Tax Audit for Professionals

If you are carrying on a profession (doctor, lawyer, architect, chartered accountant, etc.), a tax audit is required if your gross receipts exceed ₹50 lakh in the previous year. 

There’s no digital-transaction relief for professionals the way there is for businesses; the ₹50 lakh limit applies regardless of how your receipts come in.

For Presumptive Taxation Cases

Tax audit can also apply outside the turnover route. 

• You are covered under Section 44AD (business presumptive scheme) and declare profits lower than the prescribed rate (6% or 8% of turnover), and your income exceeds the basic exemption limit.
• You are covered under Section 44ADA (professional presumptive scheme) and declare profits lower than 50% of gross receipts, and your income exceeds the basic exemption limit.
• You opt out of the presumptive scheme within five years of opting in, books and audit are due in those years if income exceeds exemption limit
• If you’re unsure how the 6%/8% or 50% thresholds under the presumptive taxation scheme apply to your situation, it’s worth reviewing the mechanics before assuming you’re audit-exempt.

This is a common blind spot for small businesses that assume presumptive taxation keeps them audit-free permanently.

If any of these conditions apply to you for FY 2025-26, get your books in order now. Waiting until August to check applicability leaves very little room to arrange documentation, resolve mismatches, and get your auditor’s sign-off before the deadline.

What’s Different This Year: Filing Under the Old Act for a Transition Year

AY 2026-27 is a transition year. The new Income Tax Act, 2025 came into effect from 1 April 2026. 

Section 44AB, the provision you’ve relied on for years, has been renumbered as Section 63 under the new Act, and the audit report itself moves from the familiar Forms 3CA, 3CB, and 3CD to a single, consolidated Form No. 26.

Even though the filing happens after 1 April 2026, the old law governs your return. 

What this means for you:

• Use the old forms: For AY 2026-27, you must file using the forms prescribed under the 1961 Act, Form 3CA/3CB and Form 3CD for the tax audit report.
• The new Act applies to income from 1 April 2026 onwards: Income earned from that date will be assessed under the Income Tax Act, 2025 for Tax Year 2026-27 and onwards.
• The e-filing portal will handle both: The Income Tax Department has set up the portal to facilitate compliance under both laws during this transition.

That said, a few changes have landed within the existing Form 3CD for this audit season:

• Clause 21, which covers disallowable expenses, now picks up settlement expenses that haven’t actually been paid. 
• Clause 26, dealing with Section 43B compliance, has sharpened its focus on payments to MSME entities that remain outstanding beyond the prescribed period, along with tracking of amounts disallowed in prior years.
• A new sub-clause under Clause 36B captures buyback-related reporting. None of these are dramatic overhauls, but they do mean your auditor needs current-year data on settlement liabilities and MSME payment timelines that older audit files may not have tracked in the same detail.

Treat this as a normal Section 44AB audit under the 1961 Act, with a handful of updated disclosures inside Form 3CD, and keep the new Act’s changes on your radar for next year’s planning rather than this year’s filing.

Documents & Records Your Auditor Will Need – Start Now, Not in September

Waiting until September to gather documents is a mistake. Your auditor needs time to examine records, verify entries, and prepare the report. Start now.

Here is what your auditor will ask for:

Financial Statements and Books of Account

Your auditor will first ask for your complete books and financial statements for FY 2025–26, including:

• Profit and loss account
• Balance sheet as of 31 March 2026
• Cash flow statement, where applicable
• Notes to accounts
• Trial balance
• Cash book and bank book
• General ledgers, journals, and vouchers
• Fixed asset register
• Stock register and inventory records

If you changed accounting software or migrated data during the year, keep the migration records and reconciliation statements ready.

Bank and Financial Records

Gather all financial documents in one place, including:

• Bank statements for all accounts
• Loan statements and interest certificates
• Investment records
• Foreign remittance details
• Details of loans and deposits accepted or repaid during the year

Auditors specifically review compliance with Sections 269SS and 269T, which regulate cash transactions involving loans and deposits.

Tax and Compliance Documents

Tax reconciliations are often the most time-consuming part of an audit. Keep the following documents ready:

• Computation of total income
• Advance tax and self-assessment tax challans
• TDS certificates, including Forms 16 and 16A
• TCS certificates
• TDS return acknowledgements, such as Forms 24Q, 26Q, and 27Q
• Annual Information Statement (AIS), Tax Information Statement (TIS), and Form 26AS
• GST registration documents and returns, including GSTR-1, GSTR-3B, and GSTR-9

Before sharing records with your auditor, reconcile your GST returns with your books, sales register, and purchase register. Mismatches between GST filings and income tax records are a common reason for delays.

Business-Specific Records

Depending on the nature of your business, auditors may also require:

1. Sales and purchase invoices.
2. Export and import documents.
3. Related-party transaction details for Section 40A(2)(b) reporting.
4. Shareholder or partner information.
5. Board resolutions and meeting minutes.
6. Transfer pricing documentation for international transactions.
7. Physical stock verification reports and inventory valuation workings.

Documents Required for Form 3CD

Form 3CD contains 44 reporting clauses, many of which require supporting documentation. Clauses relating to disallowable expenses, statutory dues, TDS compliance, and GST expenditure reporting generally receive the highest scrutiny.

Your auditor will need:

• Proof of payment for PF, ESI, bonus, and other liabilities covered under Section 43B.
• TDS and TCS reconciliation statements.
• GST-wise expense break-ups.
• Details of any deviations in stock valuation methods.

Keeping records organized throughout the year makes tax audits easier and gives your auditor more time to identify issues.

Penalty for Missing the Tax Audit Due Date (Section 271B)

If you’re required to get a tax audit done and you either skip it entirely or file the report after 30 September, Section 271B gives your assessing officer the power to levy a penalty. 

The penalty calculation:

The amount is the lower of two figures: 0.5% of your total sales, turnover, or gross receipts for the year, or ₹1,50,000.

Example:

• Turnover: ₹2 crore
• 0.5% of ₹2 crore = ₹1,00,000
• Penalty = ₹1,00,000 (lower than ₹1,50,000)
• Turnover: ₹5 crore
• 0.5% of ₹5 crore = ₹2,50,000

Penalty = ₹1,50,000 (capped)

The penalty isn’t automatic in every case. If you can show reasonable cause for the delay, the assessing officer has discretion to waive it. Tribunals and courts have historically accepted circumstances such as the resignation of a key accountant, loss of accounting records due to events beyond your control, labour disruptions like extended strikes, or the auditor’s serious illness. 

However, relying on this is risky. The safe approach: comply on time.

Additional costs of delay:

Beyond the Section 271B penalty, late filing also triggers:

• Section 234F fee: ₹5,000 (or ₹1,000 if income below ₹5 lakh) for late ITR filing.
• Interest under Sections 234A, 234B, 234C: On unpaid tax amounts.

Also, an income tax return filed without the required tax audit report is treated as defective under Section 139(9), which means you get a notice to fix it within a specified window or risk the return being treated as not filed at all. 

That, in turn, can affect your ability to carry forward business losses and capital losses to future years. This is a much larger financial hit than the Section 271B penalty itself for many businesses.

If you know you’re going to miss the deadline, don’t wait for the department to catch it. Talk to your CA about documenting the reasonable cause and getting the audit completed as quickly as possible after 30 September. 

The penalty calculation and any waiver application both go smoother when you’re proactive.

Tax Audit vs. Statutory Audit – How the Two Overlap for Companies

If you run a company, you’re likely dealing with two separate audits every year. Here’s how they differ: 

Aspect	Statutory Audit	Tax Audit (Section 44AB)
Governing law	Companies Act, 2013	Income-tax Act, 1961
Applicability	Every company, regardless of turnover	Turnover/receipts above prescribed limits
Purpose	True and fair view of financial statements	Verification for income-tax computation
Reporting format	Auditor’s report under Companies Act, CARO where applicable	Form 3CA/3CB with Form 3CD
Filed with	Registrar of Companies (via AOC-4)	Income-tax e-filing portal

Statutory Audit (Companies Act, 2013)

Statutory audit is a requirement under the Companies Act, 2013, and it applies to every company registered in India:private or public, regardless of turnover, profit, or size. 

A CA appointed as statutory auditor examines your financial statements and certifies whether they present a true and fair view, in line with Indian accounting standards and the Companies Act’s reporting requirements, including CARO 2020 where applicable. 

This audit is tied to your Annual General Meeting cycle and your Registrar of Companies filings, not to any turnover threshold.

Tax Audit (Section 44AB, Income Tax Act)

Tax audit under Section 44AB, on the other hand, exists purely for income-tax purposes. 

It applies only once you cross the turnover or receipt thresholds discussed earlier, and its job is to verify that your income, deductions, and disclosures are accurate for tax computation, not to certify your financial statements as a whole.

How They Connect

If your company is already subject to statutory audit under the Companies Act, your tax auditor uses Form 3CA rather than Form 3CB. 

Form 3CA essentially says the books have already been audited under another law, and the tax auditor is layering income-tax-specific verification on top of that existing audit, rather than starting from scratch on the financial statements themselves.

 Form 3CD, the 44-clause statement of particulars, gets attached either way.

However, do not assume the statutory audit report substitutes for the tax audit report. They are separate filings with separate authorities. The tax audit report (Form 3CD) contains specific tax-related disclosures that the statutory audit report does not cover.

Practical tip for companies:

Your statutory auditor and tax auditor can be the same firm and mostly are. Many companies appoint one CA firm to handle both. This saves time and ensures consistency between the financial statements and the tax audit report.

PKC’s Tax Audit & Compliance Support for Businesses

Getting through tax audit season without last-minute stress comes down to two things: starting early and working with an auditor who understands both the compliance mechanics and your specific business context. 

PKC Management Consulting has spent over three decades building exactly that kind of practice for businesses across Chennai and beyond.

Our tax audit services for private limited companies are built around this same start-early philosophy, so the September crunch never becomes your problem

We provide comprehensive tax audit services across business types from listed companies and foreign companies to private limited companies, NBFCs, and MSMEs.

What PKC offers for tax audit compliance:

• End-to-end tax audit services: From determining applicability under Section 44AB to filing Form 3CA/3CB and Form 3CD with a valid UDIN.
• Financial document review: Meticulous review of financial documents, detailed financial analysis, and assurance of compliance with Indian tax laws.
• GST reconciliation: Reconciliation of GST turnovers, including Clause 44 of Form 3CD which requires GST-wise expenditure break-up to match with GSTR filings and ITR.
• 26AS/AIS reconciliation: Rectification of 26AS with books of accounts.
• Related party transaction verification: Ensuring accuracy and compliance for related party transactions.
• Tax liability identification: Analysis of tax situations to identify potential liabilities and opportunities for tax savings.
• Beyond compliance: PKC goes beyond basic compliance to offer strategic tax audit services, including tax planning and financial health advisory.

We don’t treat tax audits as a September-only event. 

Our team works with clients through the year to flag documentation gaps early, track presumptive-taxation positions, and keep GST and TDS reconciliations current, so the actual audit period is a formality rather than a fire drill.

If your business is approaching the Section 44AB threshold for the first time, or you simply want your FY 2025-26 audit handled without the usual last-quarter scramble, get in touch with PKC to schedule a consultation well before the 30 September 2026 deadline.

FAQs

Q1: What is the tax audit due date for AY 2026-27? 

The tax audit report under Section 44AB is due by 30 September 2026 for FY 2025-26 (AY 2026-27). The ITR due date for audit cases follows on 31 October 2026. If transfer pricing provisions apply, the audit report deadline extends to 31 October 2026 and the ITR deadline to 30 November 2026.

Q2: Who is required to get a tax audit done under Section 44AB? 

Businesses with turnover above ₹1 crore (₹10 crore if cash receipts and payments are each 5% or less of total transactions) and professionals with gross receipts above ₹50 lakh. Taxpayers who declare profits below presumptive rates under Sections 44AD, 44ADA, or 44AE can also trigger a mandatory audit.

Q3: What is the penalty for missing the tax audit due date? 

Under Section 271B, the penalty is the lower of 0.5% of total sales, turnover, or gross receipts, or ₹1,50,000. It can be waived if you demonstrate reasonable cause, such as loss of records or the auditor’s illness, but poor planning generally doesn’t qualify.

Q4: Is a tax audit different from a statutory audit under the Companies Act? 

Yes. Statutory audit applies to every company regardless of turnover and certifies the financial statements under the Companies Act. Tax audit applies only once Section 44AB thresholds are crossed and verifies income-tax figures. Companies already under statutory audit use Form 3CA for their tax audit report.

Q5: What documents does my CA need to complete the tax audit on time? 

Books of account, bank statements, GST returns, TDS return acknowledgments and Form 26AS reconciliation, stock valuation records, loan and deposit details for Sections 269SS/269T, related-party transaction records, and presumptive-taxation computations if applicable. Gathering these in July and August avoids a September scramble.

Q6: Can the tax audit due date be extended by CBDT? 

Yes, the CBDT has extended tax audit and ITR deadlines in past years, including a one-month extension for AY 2025-26 due to reported compliance challenges. However, extensions aren’t guaranteed each year, so plan around the original 30 September date rather than assuming one will come.