ITR-3 for FY 2025-26 (AY 2026-27): Applicability, Pre-Filing Verification and Due Dates

The return we file this season for FY 2025-26 carries a distinction that will not repeat: it marks the last regular filing season under the Income-tax Act, 1961. The Income-tax Act, 2025 came into force on 1 April 2026, but because AY 2026-27 relates to income earned before that date, the entire assessment - the form, the sections, the late fee, even the defective-return notice, if one comes continues under the old Act. The Income Tax Department has clarified this position on the e-filing portal itself, so any client note or submission for this year should still cite the 1961 Act, not the new one.

For those of us handling business and professional clients, ITR-3 is where most of the season's work sits. The CBDT notified the ITR forms for AY 2026-27 on 30 March 2026 through the Income-tax (Sixth Amendment) Rules, 2026, effective 31 March 2026, unusually early compared to the late-April notifications we saw last year followed by a set of corrigenda in April 2026. On the portal, online filing and the Excel utility for ITR-3 were enabled on 19 June 2026, and the offline utility followed on 23 June 2026. The machinery is fully in place; what remains is careful preparation.

Who files ITR-3

ITR-3 is meant for individuals and Hindu Undivided Families having income under the head 'Profits and gains of business or profession' who are not covered by the presumptive route of ITR-4. In practice, the form reaches four broad categories of taxpayers.

First, proprietors and professionals maintaining regular books of account - the shop owner, the doctor or lawyer in independent practice, the consultant billing under his own name - who report actual profits from a profit and loss account rather than a presumptive percentage. Second, partners in partnership firms. Remuneration, interest on capital and share of profit from a firm all fall under business income, so a partner files ITR-3 even if the partnership income is modest; this is a point I find myself repeating to clients every year who assume a small partner's salary can go into ITR-1 or ITR-2. Third, taxpayers with F&O or intraday trading activity, since the law treats such income - or loss - as business income. Fourth, presumptive taxpayers who have exited the scheme: a business that crossed the Section 44AD turnover threshold during FY 2025-26, a professional above the Section 44ADA limit, or an assessee declaring profit below the prescribed rate and therefore falling into tax audit territory.

Alongside business income, ITR-3 accommodates salary, house property, capital gains and income from other sources, so a salaried employee with a side consultancy or trading account files everything in this one form. Conversely, anyone eligible for ITR-1, ITR-2 or ITR-4 should not use ITR-3, and firms and LLPs file their own return in ITR-5 - the partner's ITR-3 and the firm's ITR-5 are separate filings that must speak to each other.

Due dates for AY 2026-27 - The calendar has changed

The most significant development this year is structural, not procedural. The Finance Act, 2026 has amended Section 139(1) to give non-audit taxpayers filing ITR-3 and ITR-4 a due date of 31 August of the assessment year, in place of the common 31 July date. This is a permanent statutory change effective from AY 2026-27 onwards, not a one-time extension of the kind we have grown used to waiting for. Salaried taxpayers on ITR-1 and ITR-2 remain at 31 July 2026, while business and professional filers get the additional month to close books and reconcile.

A related relaxation: the window for a revised return under Section 139(5) now runs up to the end of the assessment year, i.e. 31 March 2027 for AY 2026-27, against the earlier 31 December cut-off. The full calendar stands as follows.

Two practical notes on this table. A partner's due date follows the firm's status - if the firm is subject to tax audit, the partner's ITR-3 moves to 31 October 2026 as well. And the extended filing date does nothing for advance tax: the four instalments stood due on their usual dates through FY 2025-26, and interest under Sections 234B and 234C runs independently of when the return is filed.

What has changed in the ITR-3 form this year

The notified form carries several disclosure-level changes worth noting before data entry begins. F&O trading now has a dedicated, separate disclosure of turnover and income within the profit and loss reporting - a direct response to the surge in derivatives activity, and a field the Department will certainly match against broker-reported data in AIS. The capital gains schedules have shed the pre-23 July 2024 rate references, since the Finance Act, 2025 rates now apply for the full year. Donations claimed under Section 80G require the transaction reference number (UPI/cheque/NEFT/RTGS/IMPS) along with the bank IFSC - casual 80G claims without a payment trail will now surface immediately. The disability-related deductions under Sections 80DD and 80U call for a granular classification of the disability rather than the earlier broad grouping. Representative-assessee filing has been simplified to name, contact number and e-mail. The form also permits a primary and a secondary address, and income from foreign retirement benefit accounts under Section 89A is now reportable only in ITR-2 and ITR-3.

What I verify before submitting an ITR-3

Over the years I have settled into a fixed pre-submission routine, because nearly every defective-return notice or mismatch intimation I have seen traces back to one of the points below rather than to any complex question of law. [Anonymised client example to be inserted here - e.g., a partner whose firm's audited accounts revised his remuneration figure after his personal return was drafted.]

1. Form and year selection. Confirm the client actually belongs in ITR-3 - not ITR-4 (presumptive continuing), not ITR-2 (no business income) - and that AY 2026-27 is selected in the utility. A return filed on last year's form version fails schema validation.

2. AIS, TIS and Form 26AS reconciliation. Every entry in AIS - interest, dividends, securities transactions, GST turnover, property dealings - must either appear in the return or have a documented reason for exclusion. TDS claimed must match 26AS; a credit appearing in books but not in 26AS should be chased with the deductor before filing, not after.

3. Regime selection and Form 10-IEA. The new regime under Section 115BAC is the default. A business-income assessee wishing to opt for the old regime must file Form 10-IEA on or before the Section 139(1) due date - and the once-in-a-lifetime restriction on re-entering the new regime for business cases means this choice deserves a proper computation under both regimes, not a habit-driven tick.

4. Books, P&L and balance sheet. Close the books properly: bank balances tallied to statements as on 31 March 2026, debtors and creditors confirmed where material, depreciation recomputed at Income-tax rates (not Companies Act rates), and Schedule BP adjustments - Sections 40, 40A, 43B disallowances, ICDS effects - walked through line by line.

5. GST-to-books turnover reconciliation. Turnover per GSTR-1/GSTR-3B should reconcile with the P&L, with a working paper explaining differences (unbilled revenue, credit notes, non-GST income). The Department receives GST turnover in AIS, so an unexplained gap is an invitation to scrutiny.

6. Partner-firm cross-check. Remuneration and interest reported in Schedule IF of the partner's ITR-3 must agree with what the firm has claimed in its ITR-5 and books - after the firm's accounts are final, not before.

7. Capital gains schedules. Broker statements matched to Schedule CG, correct rates applied under the Finance Act, 2025 framework, and buyback-related losses claimed only where the corresponding dividend income has been offered in Schedule OS.

8. Tax audit applicability. Test Section 44AB thresholds afresh each year - including the ₹10 crore limit where cash receipts and payments are within 5% - and the presumptive opt-out trap under Section 44AD(4)/44ADA, where declaring lower profit with income above the basic exemption triggers audit. If audit applies, the due date changes and Form 3CD must precede the return.

9. Taxes paid and interest. Compute interest under Sections 234A/234B/234C, pay self-assessment tax, and confirm the challan reflects against the correct PAN and AY 2026-27 before submission.

10. Bank accounts, foreign assets and losses. Report all Indian bank accounts held during the year, pre-validate the refund account, complete Schedule FA where the client holds foreign assets, and remember that business and capital losses carry forward only if the return is filed within the Section 139(1) due date - which for a non-audit ITR-3 now means 31 August 2026.

11. E-verification within 30 days. A return uploaded but not verified within 30 days is treated as not filed. Aadhaar OTP at the time of submission closes the loop then and there; I no longer let clients leave verification 'for later'.

If the due date is missed

A belated return under Section 139(4) remains open until 31 December 2026, but it comes at a price: the late fee under Section 234F (₹5,000, or ₹1,000 where total income does not exceed ₹5 lakh), interest under Section 234A at 1% per month on unpaid tax, forfeiture of business and capital loss carry-forwards, and the loss of the option to choose the old regime for the year. Beyond December, only the updated return under Section 139(8A) survives - available for 48 months from the end of the assessment year, but with additional tax of 25% to 70% depending on when it is filed, and never for claiming a refund. The extra month granted by the Finance Act, 2026 is best treated as time for better reconciliation, not later filing.

Disclaimer: This article is for general information and academic discussion only and does not constitute professional advice or a solicitation of professional work. The positions stated are based on the Income-tax Act, 1961, the Finance Act, 2026 and CBDT notifications in force as on the date of writing, which remain subject to change through further notifications, circulars and clarifications. Readers should verify the current legal position and consult a qualified professional with reference to their specific facts before acting on any part of this article. The author accepts no liability for any loss arising from action taken or refrained from on the basis of this content.