ITR-1, ITR-2, ITR-3, ITR-4 for FY 2025-26: the correct form, the cost of picking the wrong one, and the 31 July deadline

The income tax filing window for FY 2025-26 opens in earnest in June, when the consolidated AIS (Annual Information Statement) and TIS (Taxpayer Information Summary) on the income tax portal reflect the year's TDS, interest income, mutual fund transactions, and dividend payouts from across the ecosystem. The 31 July 2026 due date for non-audited individuals is ten weeks from the publication of this post, and the most common preventable error in those ten weeks is the choice of ITR form.

This post walks through the four ITR forms that cover almost every individual taxpayer (ITR-1 Sahaj, ITR-2, ITR-3, ITR-4 Sugam), the eligibility tests under each, the section 139(9) defective-return mechanic when the wrong form is filed, and the practical decision tree we use during May and June to pick the right form on the first attempt.

The four forms, in one sentence each

ITR-1 Sahaj. Simplest. For salaried residents with one house property, no capital gains, total income up to ₹50 lakh.

ITR-2. For individuals and HUFs with capital gains, multiple properties, foreign income, foreign assets, or income exceeding ₹50 lakh, but no business or professional income.

ITR-3. For individuals and HUFs with income from proprietary business or profession.

ITR-4 Sugam. Simplified form for taxpayers opting in to presumptive taxation under sections 44AD, 44ADA, or 44AE.

The choice between these four covers approximately 95 per cent of individual filers in India. The remaining 5 per cent are HUFs filing for trust income, partners in firms, and a few specialised categories that map to ITR-5 through ITR-7.

Why the Sahaj form is more restrictive than people think

ITR-1 is marketed as the simple form, and for genuinely simple cases it is. The eligibility conditions, however, are strict. The disqualifying items are:

• Any capital gains in the year, even a single mutual fund redemption or share sale.
• Ownership of more than one residential house property.
• Any foreign assets or foreign income, including ESOPs vested while working at a foreign subsidiary.
• Income from lottery, crossword puzzles, or racehorses.
• Agricultural income above ₹5,000.
• Carry-forward losses from previous years to be set off.
• Status as a director in any company.
• Ownership of unlisted equity shares at any time during the year.
• Total income exceeding ₹50 lakh.
• TDS under section 194N (cash withdrawals above ₹1 crore).

The capital gains test is the trap. A salaried individual who SIPped into an equity mutual fund for ten years and redeemed ₹50,000 worth in March to fund a family expense has a capital gain transaction in the year, and is required to file ITR-2 rather than ITR-1. The gain itself may be small (or even a loss), but the form selection is binary.

The other common trap is the unlisted equity test. Founders and senior employees of startups who hold ESOPs that have vested but not yet been exercised are technically "holders of unlisted equity" at year-end and so are pushed into ITR-2.

When ITR-2 becomes necessary

ITR-2 is the workhorse form for the urban professional in India. It accommodates salary income, multiple house properties, capital gains across asset classes, dividend income, interest income, and foreign assets. It includes Schedule AL (assets and liabilities) for individuals with income above ₹50 lakh, Schedule FA (foreign assets) for any resident with foreign holdings, and Schedule 112A for grandfathered equity gains under the FY 2017-18 cut-off.

The form is around 30 pages when printed and looks intimidating, but most of the schedules are conditional. A salaried individual with a single mutual fund redemption only fills in Schedule CG (capital gains) and the basic income sections; the foreign-asset and unlisted-equity schedules can be marked "Not applicable".

The tax computation logic is the same as ITR-1. The difference is in the disclosure scope.

When ITR-3 is required: business or professional income

ITR-3 applies the moment an individual has any income from "business or profession" as defined under section 28 of the Income-tax Act. This includes:

• Income from a proprietorship business (manufacturing, trading, services).
• Income from a profession that is not opting in to presumptive taxation under section 44ADA.
• Freelance income for which the assessee is not using the section 44ADA route.
• Share of profits from a partnership firm, when the individual is a partner (the share itself is exempt under section 10(2A), but the form is still ITR-3).
• Speculative income (intraday equity trading) and non-speculative business income (F&O trading).

ITR-3 requires a profit and loss account, a balance sheet, and quantitative details for trading and manufacturing businesses. The disclosure burden is meaningful. For a small proprietor with annual receipts under ₹2 crore, the section 44AD presumptive route via ITR-4 Sugam is usually preferable to ITR-3 for that reason alone.

The F&O trader is the modal case in our practice for ITR-3 in recent years. The presumptive route is technically available for F&O income only in very narrow circumstances (and the CBDT has not issued comprehensive guidance), so most traders file ITR-3 with their broker's tax statement reconciled against their bank statements.

ITR-4 Sugam and the presumptive routes

ITR-4 Sugam is the form for taxpayers electing presumptive taxation, which removes the obligation to maintain books of account in exchange for accepting a statutory profit margin.

Section 44AD applies to eligible businesses with turnover up to ₹3 crore (raised from ₹2 crore by Finance Act 2023, subject to 95 per cent digital receipts condition). The deemed profit is 8 per cent of turnover, or 6 per cent for the portion of turnover received through banking channels. Once opted in, the assessee is locked in for five years; opting out triggers a five-year disqualification.

Section 44ADA applies to specified professionals (legal, medical, engineering, architectural, accountancy, technical consultancy, interior decoration, and notified others) with gross receipts up to ₹75 lakh (raised from ₹50 lakh by Finance Act 2023, subject to 95 per cent digital receipts condition). The deemed profit is 50 per cent of gross receipts.

Section 44AE applies to goods carriage operators with up to ten vehicles. The deemed income is ₹1,000 per ton per month for heavy goods vehicles and ₹7,500 per month for other vehicles.

The disqualifications for ITR-4 are the same restrictive conditions as ITR-1 plus the cap of ₹50 lakh total income (which is lower than the ₹3 crore turnover cap of section 44AD, meaning a small proprietor with high turnover and low margin may exceed ₹50 lakh income and be pushed into ITR-3 even when otherwise eligible for 44AD).

The decision tree we use in practice

The five-question decision tree we work through with new individual clients in May and June:

Question 1. Did you have any business or professional income in the year?

• Yes, and you want presumptive taxation → ITR-4 Sugam (subject to ₹50 lakh income cap).
• Yes, and you maintain books or are not eligible for presumptive → ITR-3.
• No → Go to Question 2.

Question 2. Did you have any capital gains in the year (equity, MF, property, gold)?

• Yes → ITR-2.
• No → Go to Question 3.

Question 3. Do you own more than one residential property, hold foreign assets, are a director in any company, or hold unlisted equity?

• Yes → ITR-2.
• No → Go to Question 4.

Question 4. Was your total income above ₹50 lakh, or do you have agricultural income above ₹5,000?

• Yes → ITR-2.
• No → ITR-1 Sahaj.

This decision tree resolves correctly for approximately 95 per cent of individual taxpayers. The remaining edge cases (HUF Karta filing for the family, NRIs with multiple income streams, taxpayers with the section 89 relief on arrears) need a deeper case-by-case look.

The new regime versus old regime choice

The form selection is independent of the regime choice. ITR-1, ITR-2, ITR-3, and ITR-4 all accommodate both the old regime (with deductions under Chapter VI-A) and the new regime under section 115BAC.

For FY 2025-26 (AY 2026-27), the new regime is the default. A taxpayer who wants to file under the old regime must explicitly opt out within the ITR form. The opt-out is a one-time annual choice for salaried individuals (no Form 10-IEA required, since FY 2024-25), but business or profession assessees who opt for the old regime once and then want to switch back to the new regime are restricted.

The new regime slabs for FY 2025-26 are: nil up to ₹4 lakh, 5 per cent from ₹4 to ₹8 lakh, 10 per cent from ₹8 to ₹12 lakh, 15 per cent from ₹12 to ₹16 lakh, 20 per cent from ₹16 to ₹20 lakh, 25 per cent from ₹20 to ₹24 lakh, and 30 per cent above ₹24 lakh. The standard deduction of ₹75,000 against salary is available, and the section 87A rebate covers tax on incomes up to ₹12 lakh.

For a salaried individual with total compensation of ₹20 lakh, the new regime is usually the better choice if the available deductions under the old regime (80C, 80D, HRA, home loan interest) sum to less than approximately ₹4.5 lakh. The exact crossover varies with the specific income and deduction mix; we model it for each client before filing.

The section 139(9) defective return

If the wrong ITR form is filed, the Centralised Processing Centre issues a notice under section 139(9) calling the return defective. The notice is delivered to the registered email and is also visible on the e-filing portal under "Pending Actions".

The window to cure the defect is 15 days from receipt of the notice (extendable on request to the assessing officer). Curing the defect means filing the correct ITR form, re-validating the return, and re-submitting. The original filing date is treated as the date of the original return, so refunds and carry-forwards are preserved if the defect is cured in time.

If the 15-day window is missed, the original return is treated as invalid. The assessee is then in the position of a non-filer for the year and must file a belated return under section 139(4) on the correct form. The belated return attracts the section 234F fee, loss of the ability to carry forward losses, and a delay in refund processing.

The May-to-July filing window

The right time to file the ITR is not 1 April. The AIS, TIS, and 26AS forms on the income tax portal stabilise around mid-May to mid-June as employers file their final TDS returns for Q4 of the previous year and mutual funds report capital gains.

Filing too early (before the AIS is complete) means missing TDS credit and possibly mismatched dividend reporting; filing too late (close to 31 July) means competing with portal load and last-minute issues. We schedule individual filings for our retainer clients between 10 June and 10 July as the standard window.

For the May-to-July window to work cleanly, the form choice has to be settled in May. Once you know which form applies, the data assembly takes a single sitting with the AIS, salary slips, broker statements, and bank interest certificates. The form choice is the bottleneck, not the data.