Missed the 31 August ITR-3/ITR-4 deadline? Filing belated for AY 2026-27.
The extension has expired — a belated return is still possible until 31 December 2026, but the carry-forward you forfeit usually costs a founder far more than the late fee.
The extension that moved non-audit ITR-3 and ITR-4 filings from 31 July to 31 August 2026 has now expired. If you filed by that date, none of this applies to you. If you did not, the return is late — but it is still very much filable, and filing it soon costs materially less than leaving it.
You can still file, until 31 December 2026
A missed due date does not close the window. A belated return under Section 139(4) can be filed up to 31 December 2026 for AY 2026-27 — same forms, same portal. What changes is the fee, the interest, and what you give up.
One point worth stating plainly, because it is causing confusion right now: the Income-tax Act, 2025 came into force on 1 April 2026, but it does not govern returns for income earned up to 31 March 2026. For AY 2026-27 — the year you are filing now — the Income-tax Act, 1961 provisions still apply, including the section numbers below. The new Act's numbering becomes relevant for FY 2026-27 income, filed next year. Our section map of the 1961 Act against the 2025 Act covers where the two diverge.
What a belated return costs
The late-filing fee under Section 234F is ₹5,000, reduced to ₹1,000 where total income does not exceed ₹5 lakh. It is a flat fee, not a percentage, and it does not scale with how late you are — so there is no saving in waiting.
Interest under Section 234A is the part that does grow with delay: it runs on unpaid tax from the due date until you file. That, rather than the fee, is the actual argument for filing now instead of at the December boundary.
What you forfeit — usually the expensive part
For founders, the fee is rarely the real cost. On a belated return:
- Business losses and capital losses cannot be carried forward. For a loss-making year, a forfeited carry-forward can be worth multiples of the ₹5,000 fee in future set-off. Loss from house property is the usual exception.
- Certain deductions are disallowed on late filing.
If you have losses you were counting on carrying forward and have not yet filed, that specific combination is what makes this urgent rather than administrative.
If you are an audit case, this was never your deadline
Audit-liable filers were never on the 31 August date and are not late. That window runs to 31 October 2026 and is still ahead. If you are unsure which side of the audit line you fall on, settle that question first — it determines the deadline, the forms, and whether any of the above applies to you at all.
How Advisory Monks Consulting helps
Our Founders Tax Desk works belated-return decisions the way they actually matter: whether a carry-forward is at stake, what the Section 234A exposure looks like at today's date versus December, and whether to file now or alongside a correction. If you are sizing tax payable while you file, our advance-tax calculator covers the instalment math, and the advance tax guide for founders and NRIs explains how one-off income breaks the quarterly schedule.
General information, not tax advice. The fee and interest provisions cited are Income-tax Act, 1961 provisions applicable to AY 2026-27. Confirm your audit status and applicable form before relying on any date here, and speak with a partner before acting.
This note is general guidance, not tax or legal advice. Positions depend on your specific facts — speak with a partner before acting.
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