Missed the ITR deadline, found an error after filing, or just discovered unreported income from a few years ago? There's a specific filing route for each situation — belated return, revised return, or the updated return (ITR-U) — each with its own deadline and cost. Here's how they differ.
Belated Return — Filed After the Original Due Date
If you miss the original due date (typically 31 July for most individual taxpayers not requiring audit), 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.
| Total Income | Late Fee under Section 234F |
|---|
| Above ₹5,00,000 | ₹5,000 |
| ₹5,00,000 or below | ₹1,000 |
⚠ Beyond the late fee: A belated return also means you cannot carry forward certain losses (e.g., business loss, capital loss, except loss from house property in some cases) to future years, and you remain liable for interest under Section 234A on any unpaid tax from the original due date.
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.
- Can be filed multiple times before the deadline if further errors are found
- Deadline: generally 31 December of the assessment year (same as the belated return deadline), or before completion of assessment, whichever is earlier
- 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
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.
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:
| When ITR-U is Filed (from end of relevant AY) | Additional Tax under Section 140B |
|---|
| Within 12 months | 25% of aggregate tax + interest |
| Between 12 and 24 months | 50% of aggregate tax + interest |
| Between 24 and 36 months* | 60% of aggregate tax + interest |
| Between 36 and 48 months* | 70% of aggregate tax + 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.
Frequently Asked Questions
What is the difference between a belated return and a revised return? ▼
A belated return is your first return for the year, filed late, attracting a late fee under Section 234F. A revised return corrects errors in a return already filed (on time or belated) and doesn't attract a separate late fee by itself, but must be filed within the statutory revision window.
What is ITR-U and when would I use it? ▼
ITR-U under Section 139(8A) lets you file or correct a return up to 48 months from the end of the relevant assessment year, but only to report additional income and pay additional tax — it cannot be used for refunds or to reduce reported income/liability. Typically used when missed income (e.g., interest or capital gains) is discovered later via AIS.
How much additional tax do I have to pay when filing ITR-U? ▼
Under Section 140B: 25% of aggregate tax and interest if filed within 12 months of the end of the relevant assessment year, 50% if filed between 12-24 months, and higher percentages (60%/70%) for the 24-48 month window. Filing sooner after discovering an error is always cheaper.