Missed 31 July? Belated & Revised Returns Under Section 139(4) & 139(5) AY 2026-27

Belated vs revised: two different problems

These two provisions solve opposite problems and are often confused. A belated return under Section 139(4) is for someone who missed the deadline entirely and has not filed. A revised return under Section 139(5) is for someone who did file on time but needs to correct a mistake. Knowing which situation you are in decides everything that follows.

Both are filed on the income tax e-filing portal, both require e-verification within 30 days, and both share a common outer deadline, but the consequences, especially the penalties, differ sharply.

Belated return under Section 139(4)

If you missed the original due date (usually 31 July for individuals not subject to audit), you can still file a belated return. For AY 2026-27, a belated return can generally be filed up to 31 December 2026, unless the department extends it.

Filing late carries costs:

• Late fee under Section 234F, ₹5,000 if filed after the due date, reduced to ₹1,000 where total income is up to ₹5 lakh.
• Interest under Section 234A at 1% per month on any unpaid tax, from the original due date to the date you actually file.
• Loss of carry-forward, most losses (business, capital) cannot be carried forward if you file late, a costly hidden penalty for investors and businesses.
• Delayed refund and reduced interest, refund interest under Section 244A runs only from your filing date, not from 1 April.

Revised return under Section 139(5)

Filed on time but realised you forgot some interest income, claimed the wrong deduction, picked the wrong regime, or entered a figure incorrectly? A revised return replaces your original entirely. You can revise as many times as needed within the window; the last valid return is the one that stands.

For AY 2026-27, a revised return can generally be filed up to 31 December 2026. There is no penalty for revising a return, it is your right to correct a genuine mistake, provided the original was filed on time. A belated return can also be revised.

When you file, quote the acknowledgement number and date of the original return so the system links them. Then e-verify the revised return, or it will not be processed. If your revision is triggered by a department notice, read our notice reply guide first to decide between a revision and a rectification.

The updated return (ITR-U): a third option

If both the belated and revised windows have closed, an updated return under Section 139(8A), ITR-U, may still let you come clean, generally within an extended window from the end of the assessment year, on payment of additional tax. It cannot be used to reduce your income, claim or increase a refund, or increase a loss; it exists to let taxpayers report additional income and pay up.

The additional tax rises the later you file the ITR-U, a graded surcharge on top of the tax and interest, so it rewards coming forward sooner. It is a genuine backstop for missed income, but a poor substitute for timely, accurate filing.

A worked example

Meera, a freelance designer, missed 31 July and filed on 20 November. Her total income was ₹9 lakh with ₹15,000 of tax still payable. She paid: a ₹5,000 late fee under 234F, plus 234A interest of roughly ₹600 (1% for four months on ₹15,000), and, because she had a ₹40,000 short-term capital loss on shares, she also lost the right to carry that loss forward. That lost carry-forward could have saved her tax in a future year, making it the most expensive part of filing late.

Had she filed by 31 July, she would have paid neither the late fee nor 234A interest, and kept her loss carry-forward intact. The arithmetic of timely filing is almost always in your favour.

Which one applies to you?

In short: never filed and past the date → belated return under 139(4). Filed on time but need to fix something → revised return under 139(5). Both windows gone but you have undisclosed income to report → ITR-U under 139(8A).

Getting the classification, deadline, and penalty computation right matters, especially where losses or a refund are involved. Our income tax & ITR filing service handles belated, revised, and updated returns and will tell you which one minimises your cost. book a free consultation if you are unsure which applies.

Key dates and a filing checklist

For AY 2026-27, keep these dates in view: the original due date (typically 31 July 2026 for non-audit individuals), the belated/revised outer limit (generally 31 December 2026), and the far longer ITR-U window that follows. All filing happens on the income tax e-filing portal.

Before you file late or revise, run this checklist:

• Gather Form 16, Form 26AS, the AIS, and your bank and investment statements.
• Reconcile every income against the AIS so you do not repeat an omission.
• Compute any 234A/234B/234C interest and the 234F fee so there is no shortfall.
• Quote the original acknowledgement number when revising.
• e-verify within 30 days, an unverified return is treated as never filed.

The single biggest avoidable loss in late filing is loss carry-forward, so if you have capital or business losses, filing on time is worth real money in future years.