Missed the ITR Deadline? Belated Return for AY 2026-27 Explained

• •The original due date (passed): 31 July 2026 for non-audit taxpayers; 31 October 2026 for audit cases, which has not yet passed. If you are an audit case, you are not late yet.
• •31 December 2026: last date for both a belated return under 139(4) and a revised return under 139(5). This is the hard cutoff for normal filing of AY 2026-27.
• •After 31 December 2026: the only route left is ITR-U (updated return), which costs 25% to 70% additional tax on top of tax and interest, and cannot be used to claim or increase a refund.

234A interest runs on the unpaid tax amount, so if all your tax was already covered by TDS and advance tax, the belated filing costs only the 234F fee.

• •Short-term and long-term capital losses of FY 2025-26: carry-forward lost. A Rs 4 lakh equity loss that could have offset future gains and saved roughly Rs 50,000-80,000 in tax is gone permanently.
• •Business and professional losses: carry-forward lost, including speculative and F&O losses.
• •House property loss: the exception; up to Rs 2 lakh can still be carried forward even in a belated return.
• •Unabsorbed depreciation: also survives belated filing, since it is carried forward under a separate provision.
• •Set-off within FY 2025-26 itself is unaffected: current-year losses can still be set against current-year income in the belated return.

• •Reconcile AIS, TIS and Form 26AS first: for a late filing, mismatches are the main scrutiny trigger, and the department already has 8-9 months of your reported data.
• •Choose the same ITR form you would have used on time (ITR-1 to ITR-4 for most individuals and small businesses).
• •In the filing section field, select 139(4) - belated return, not 139(1).
• •Pay self-assessment tax including 234A/234B/234C interest and the 234F fee before submitting; the utility computes these once the filing date is after the due date.
• •E-verify within 30 days of submission. An unverified belated return is treated as never filed, and by the time you notice, the 31 December window may be gone.

• •Non-filer campaign notices: SMS and email nudges, followed by notices under Section 142(1) requiring you to file.
• •Best judgment assessment (Section 144): the officer assesses your income from available data, with no benefit of your deductions and expenses.
• •Penalty exposure up to 200% of tax on under-reported income (Section 270A) in assessed cases, versus the flat Rs 5,000 fee if you file belatedly on your own.
• •Prosecution for wilful failure to file (Section 276CC) in cases with tax due above Rs 25,000, carrying imprisonment of 6 months to 7 years; rarely invoked for small taxpayers but on the books.
• •Refund lost: if you had excess TDS, not filing means the refund is simply never claimed; a belated return still gets you the refund.

If TDS was deducted from you and you are owed a refund, 31 December 2026 is your only chance to get it. ITR-U cannot recover it.

• •Audit cases: the 31 October 2026 due date has not passed, so companies and audit-liable firms filing now are on time, not belated. Their belated window also ends 31 December 2026.
• •Foreign assets: if you hold foreign stocks, ESOPs or accounts and skipped Schedule FA, file or revise before 31 December 2026. Non-disclosure carries a Rs 10 lakh Black Money Act penalty, separate from anything in this guide.
• •New regime vs old regime: a belated individual return cannot opt into the old regime; late filers with business income are locked to the default new regime for the year, which can itself cost real money in lost deductions.
• •Multiple missed years: only AY 2026-27 can be filed as belated now. Earlier years (AY 2023-24 to AY 2025-26) are ITR-U territory with escalating additional tax.