Belated ITR Filing: AY 2023-24

If you miss the 31 July ITR deadline, a belated return can be filed under Section 139(4) by 31 December of the assessment year. For Assessment Year 2026-27, that means by 31 December 2026. The taxpayer pays a late fee under Section 234F of ₹5,000 (₹1,000 if income is below ₹5 lakh) and interest under Section 234A at 1% per month. Most losses cannot be carried forward. If you discover errors later, an updated return under Section 139(8A) can be filed within 48 months at an additional tax cost.

Mayank Wadhera

Published: 31 Aug 2023

Updated: 16 May 2026

4 min read

Missing the original ITR deadline is no longer terminal — but it is expensive. For Assessment Year 2026-27, the belated return mechanism under Section 139(4) gives taxpayers a structured second chance, while the updated return under Section 139(8A) extends the window further at a higher tax cost. Knowing the rules of each route is essential for any taxpayer who slips past 31 July.

The deadline architecture

Original due date: 31 July 2026 for individuals not subject to audit (AY 2026-27)
31 October 2026 for taxpayers requiring audit (no transfer pricing)
30 November 2026 for taxpayers covered by transfer pricing
Belated return (Section 139(4)) due date: 31 December 2026 for AY 2026-27
Updated return (Section 139(8A)) window: up to 48 months from end of AY, subject to conditions

Belated return: Section 139(4)

A belated return is filed under Section 139(4) by 31 December of the relevant assessment year. The taxpayer pays a late filing fee under Section 234F of ₹5,000 (₹1,000 if total income is below ₹5 lakh). Interest under Section 234A continues at 1% per month from the original due date until the date of filing. Critically, a belated return loses the right to carry forward most losses (except house property loss), and refund interest under Section 244A starts only from the filing date.

Updated return: Section 139(8A)

Allows the taxpayer to file or update their return within 48 months from the end of the relevant assessment year (extended from 24 months by Finance Act 2025).
Requires payment of additional tax: 25% of the additional tax and interest in the first 12 months, 50% in months 13-24, 60% in months 25-36, and 70% in months 37-48.
Cannot be used to claim refunds, reduce tax liability, or claim additional losses.
Cannot be filed if proceedings have already begun under specified sections.

Step-by-step belated filing

Log in to the e-filing portal at incometax.gov.in.
Select 'File Income Tax Return' and choose AY 2026-27.
In the filing section, select 'Section 139(4) — Belated Return'.
Compute total tax with Section 234A interest and Section 234F fee.
Pay self-assessment tax via challan ITNS 280 and verify the BSR code and challan number.
Submit the return and e-verify within 30 days via Aadhaar OTP, net banking, or DSC.

Common mistakes to avoid

Choosing the wrong assessment year — belated returns are filed in the same AY format as the original.
Forgetting to pay Section 234F fee, which is auto-validated by the portal but must be settled.
Carrying forward business or capital losses that are no longer eligible after belated filing.
Missing e-verification within 30 days, which renders the return invalid.

When to file an updated return instead

The updated return under Section 139(8A) is the appropriate tool when you discover unreported income after the belated return window has closed, or when you want to disclose income proactively to avoid future scrutiny. The 48-month window (extended from 24 months by Finance Act 2025) provides flexibility, but the additional tax burden — 25% in the first year, rising to 70% by months 37-48 — makes early action far cheaper. Common triggers for updated returns include capital gains missed on demat or property transactions, foreign income identified through AIS, and interest income inadvertently omitted. The updated return is filed in Form ITR-U through the e-filing portal, and tax is paid before filing through Section 140B challans.

Choosing the right ITR form even for belated filing

The choice of ITR form remains relevant for belated filing. ITR-1 (Sahaj) for resident individuals with income up to ₹50 lakh from salary, one house property, and other sources; ITR-2 for capital gains, foreign income, or income above ₹50 lakh; ITR-3 for business or professional income; ITR-4 (Sugam) for presumptive income under Sections 44AD, 44ADA, 44AE. Filing the wrong form leads to defective return notices under Section 139(9), with the original belated filing date governing the penalty. Always reconcile the form selection with AIS, Form 26AS, and Form 16 / 16A before submission. The portal flags many form mismatches, but not all — taxpayer due diligence is essential.

Conclusion

A belated return is a recovery tool, not a workaround. For AY 2026-27, file by 31 December 2026 if you missed 31 July, factor in Section 234A and 234F, and let go of loss carry-forward where applicable. If you discover an error or omission later, the updated return under Section 139(8A) gives you a 48-month window — but at a meaningful additional cost. Treat both as escape hatches, not rest stops.

Frequently Asked Questions

What is the deadline for a belated ITR for AY 2026-27?

The belated ITR for Assessment Year 2026-27 must be filed by 31 December 2026 under Section 139(4). The late filing fee under Section 234F is ₹5,000, reduced to ₹1,000 where total income does not exceed ₹5 lakh. Interest under Section 234A applies at 1% per month from the original due date.

Can I carry forward losses in a belated return?

No. Under Section 80, losses under the heads business or profession, capital gains, and other sources cannot be carried forward if the return is filed after the original due date under Section 139(1). Only loss from house property can be carried forward despite belated filing.

What is the difference between belated and updated returns?

A belated return is filed under Section 139(4) by 31 December of the relevant assessment year and carries Section 234F late fee and Section 234A interest. An updated return is filed under Section 139(8A) within 48 months from end of AY, with additional tax of 25% to 70% based on lateness, and cannot reduce liability or claim refund.

Can I file an updated return to claim a refund?

No. Section 139(8A) explicitly prohibits filing an updated return where the effect would be to reduce total income, increase loss, decrease tax liability, or claim or increase a refund. The updated return is designed only to disclose additional income that was missed earlier.