Belated, Revised & Updated ITR (ITR-U): Deadlines and Penalties Explained

Which route applies to you?

Belated Return — Filed After the Original Due Date

If you miss the original due date (31 July 2026 for most non-audit individual taxpayers, 31 August 2026 for non-audit ITR-3/ITR-4 filers with business or professional income), you can still file a belated return under Section 139(4), generally up to 31 December of the same assessment year (i.e., 3 months before the end of the assessment year), unless extended by the CBDT.

For related guidance and tools, visit the Income Tax and Salary Hub.

Revised Return — Correcting a Return Already Filed

If you've filed your return (on time or as a belated return) and later discover an error or omission — a missed deduction, an incorrect income figure, a wrong bank account for refund — you can file a revised return under Section 139(5). The revised return completely replaces the earlier one for that assessment year.

For the connected rule or filing step, see ITR Revised vs Updated Return: What Taxpayers Should Compare.

• Can be filed multiple times before the deadline if further errors are found
• Deadline for AY 2026-27: generally up to the end of the assessment year (31 March 2027), or before completion of assessment, whichever is earlier. This is no longer the same deadline as the belated-return window.
• No separate late fee for revising, but if the original return was itself belated, the restrictions on loss carry-forward from that belated filing still apply
• Before you revise for a tax-credit mismatch specifically, check whether the fix belongs in the return at all — see TDS/TCS/challan mismatch fixes, which are sometimes a challan-correction issue rather than a return error

If the correction increases your tax payable, pay the difference as self-assessment tax before submitting the revised return — see self-assessment tax and challan matching for the exact steps.

ITR-U (Updated Return) — The Last Resort, Up to 48 Months Later

Introduced under Section 139(8A), ITR-U allows you to file an updated return up to 48 months (4 years) from the end of the relevant assessment year — far beyond the belated/revised deadlines. However, it comes with significant restrictions:

• It can only be filed to report additional income and pay additional tax — it cannot be used to claim or increase a refund, or to reduce your previously reported total income/tax liability.
• It cannot be filed if it would result in a loss, or if an assessment/reassessment/search proceeding is already pending or completed for that year (subject to specified conditions).
• Typical use case: you discover via AIS that you missed reporting interest income, dividend income, or a capital gain from a prior year, after the normal revision window has closed.
• If instead you've received a notice about a discrepancy, start with income-tax notice help rather than filing ITR-U pre-emptively — the correct response depends on what the notice actually says.

Additional Tax under Section 140B for ITR-U

Filing ITR-U requires paying the tax due plus applicable interest (234A/234B/234C) and late fee (234F, if applicable), plus an additional tax surcharge on the aggregate of tax and interest:

*The 24-48 month window was enabled by the Finance (No. 2) Act, 2024, extending ITR-U from 24 to 48 months for eligible cases.

The clear takeaway: the cost of correcting unreported income rises the longer you wait. If AIS or Form 26AS reveals an income you missed, filing ITR-U promptly is significantly cheaper than waiting.

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