AY 2026-27 ITR due dates under Finance Act 2026

Which ITR Due Date Applies to Your Client? The Audit Question Decides, Not the Form

Summary: The article explains that the Finance Act, 2026 has introduced separate due dates for non-audit income tax returns for AY 2026-27, making liability to audit under section 44AB, rather than the ITR form or nature of income, the key determinant of the filing deadline. It sets out the due dates as 31 July 2026 for ITR-1/ITR-2 filers, 31 August 2026 for non-audit ITR-3/ITR-4 filers, 31 October 2026 for taxpayers liable to audit under section 44AB, 30 November 2026 for section 92E transfer pricing cases, 31 December 2026 for belated returns under section 139(4), and 31 March 2027 for revised returns under section 139(5). The article outlines a sequence for determining the applicable due date, identifies situations where taxpayers may be wrongly classified, including F&O traders, presumptive taxation cases, professionals under section 44ADA, partners of firms and multiple businesses, and discusses the consequences of incorrect classification, including fees under section 234F, loss of the old tax regime election, invalidity of Form 10-IEA, and loss of carry-forward of certain losses. It also notes that revised returns cannot restore benefits lost due to belated original filing.

Introduction: For the first time in years, the answer to “when is the ITR due” is not a single date. The Finance Act, 2026 has split the non-audit filing calendar, and the split has created a practical problem that did not exist last season: two clients filing the same ITR form can now have two different due dates. The staggered calendar itself is straightforward. What is not straightforward is placing a given client into the correct bucket — because the determining factor is not the return form, and it is not the nature of the income. It is whether the accounts are liable to audit under section 44AB.

This article sets out the determination sequence, the edge cases where the classification most often goes wrong, and what is actually lost when a client is placed in the wrong bucket.

1. The calendar for AY 2026-27

Two structural points are worth noting for the record.

First, the 31 August date for non-audit ITR-3 and ITR-4 filers is a permanent amendment to section 139(1) through the Finance Act, 2026 — not a departmental extension granted by circular. Practitioners who have spent past seasons waiting for a CBDT extension order should not treat this the same way. It is statutory.

Second, AY 2026-27 remains governed entirely by the Income-tax Act, 1961. Although the Income-tax Act, 2025 came into force on 1 April 2026, this filing season covers FY 2025-26 income. This is the final assessment year under the 1961 framework; income earned from 1 April 2026 falls into Tax Year 2026-27 under the new Act and will not be filed until next year.

2. The determination sequence

The question to ask is not “which form does this client file.” It is “is this client liable to audit.” Work in this order:

Step 1 — Is there business or professional income at all? If no, the client is on ITR-1 or ITR-2 and the date is 31 July 2026. Capital gains, however large, do not create business income. Interest, dividend and house property income do not either.

Step 2 — Is audit attracted under section 44AB? This is the pivot. If yes, the date is 31 October 2026 and the audit report is due one month earlier. If no, the date is 31 August 2026.

Step 3 — Do transfer pricing provisions apply? If a section 92E report is required, the date moves to 30 November 2026 regardless of everything above.

The order matters. Practitioners who start from the form and work backwards will misclassify the cases in the next section.

3. Where the classification goes wrong

These are the fact patterns that produce a wrong date in practice.

F&O and intraday traders. A salaried client who also trades derivatives is not a capital gains case. Derivative and intraday activity is business income, which moves the client to ITR-3 — and depending on turnover and profit declared, potentially into audit. Every season this is discovered late, because the client thinks of it as “investing.” The turnover computation for derivatives is itself a separate exercise and should not be left to the last fortnight.

Opting out of presumptive taxation. A client who declared under section 44AD in an earlier year, and then declares lower profits in a subsequent year within the lock-in period, attracts audit where income exceeds the basic exemption limit. The client is filing ITR-3, feels like a small business, and assumes 31 August. The correct date is 31 October, with a tax audit report due before it.

Profit below the deemed rate under 44ADA. A professional declaring less than the deemed percentage, with income above the exemption limit, is an audit case. The presence of “presumptive” in the client’s description of themselves is not determinative.

Partners of firms. Where the firm is liable to audit, the partner’s due date follows the firm’s. A partner receiving only remuneration and interest often assumes a personal deadline of 31 July or 31 August. Confirm the firm’s audit position before dating the partner’s return.

Clients with more than one business. The audit threshold is applied on the aggregate position, not business by business. Two units, each below the threshold, may still cross it together.

Practitioners should verify the applicable section 44AB thresholds and the cash-receipt and cash-payment conditions for the relevant year at incometax.gov.in before finalising the audit position. The thresholds have been amended more than once in recent years and the conditions attached to the higher limit are frequently misapplied.

4. What a wrong classification actually costs

Placing a client in the wrong bucket is not a filing formality. Three consequences follow, in ascending order of expense.

The section 234F fee. ₹1,000 where total income does not exceed ₹5 lakh, ₹5,000 otherwise. This is the consequence everyone anticipates and the least significant one.

Loss of the regime election. The new regime is the default. The old regime is available only on a return filed within the due date under section 139(1). A client with substantial Chapter VI-A deductions, home loan interest and HRA can lose a materially larger amount than the late fee, and the loss is not curable by revision.

For clients with business income, the election is made through Form 10-IEA, which must itself be filed before the due date. A wrong due date therefore invalidates the form as well as the return — a compounding error.

Loss of carry-forward. Business losses, speculation losses and capital losses cannot be carried forward where the original return is filed after the due date under section 139(1). Loss from house property survives; nothing else does. For a trading client with a significant capital loss, the eight-year consequence dwarfs every other cost in this list.

5. The revised-return window, and what it does not fix

The revised-return window for AY 2026-27 extends to 31 March 2027, a meaningful improvement on the earlier December cutoff. It accommodates the reality that AIS and Form 26AS continue to update well after the filing date — a deductor filing a late TDS statement in September, a bank correcting a reporting error in October.

Note for practitioners: some commentaries currently state the revised-return date as 31 December 2026 and others as 31 March 2027, occasionally within the same page. Confirm the position on the e-filing portal before advising a client to defer a correction.

What the extension does not do is restore anything lost by late original filing. A revised return replaces a validly filed return. If the original was belated, the regime election and the loss carry-forward were extinguished at that point and revision does not bring them back.

The operational implication is the one worth communicating to clients: file within the due date on the best available data, and revise later if the data changes. Deferring the original filing to achieve accuracy is a trade that loses more than it gains.

6. A practical note on sequencing

For audit clients, the binding constraint is not the ITR date. It is the audit report, due one month earlier, which in turn depends on closed books. A client whose books close in September cannot realistically be audited and filed by 31 October.

The practices that file smoothly are the ones that classified every client in June and July — audit or non-audit, 31 July, 31 August or 31 October — and worked backwards from there. The practices that struggle are the ones discovering a 44AB liability in the second week of October.

The classification exercise costs an hour per client list. It is worth doing before the filing work begins, not during it.

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Disclaimer: This article is for general information and does not constitute professional advice. Statutory positions are subject to amendment and to departmental extension. Readers should verify the current position at incometax.gov.in and take professional advice on specific facts.