In this guide
Income tax returns are commonly described as Original ITR, Belated ITR, Revised ITR and Updated ITR (ITR-U). Although all four involve filing an income tax return, they are used at completely different stages.
Choosing the wrong route can result in additional fees, interest or even loss of certain tax benefits. The most important question is therefore not simply which ITR form to file, but which type of return is legally available at that point in time.
For AY 2026-27, taxpayers also need to understand an important new change: while the belated-return deadline remains 31 December 2026, the period for filing a revised return has been extended up to 31 March 2027.
Original, Belated, Revised and Updated ITR at a Glance
| Type of Return | Main Purpose | Relevant Provision for AY 2026-27 |
|---|---|---|
| Original Return | Return filed within applicable due date | Section 139(1) |
| Belated Return | First return filed after original due date | Section 139(4) |
| Revised Return | Correct an earlier original or belated return | Section 139(5) |
| Updated Return | Report additional income after normal filing window | Section 139(8A) |
What Is an Original ITR?
An Original Return is simply the return filed within the applicable statutory due date under Section 139(1).
If the taxpayer files correctly and within the prescribed due date, there is generally no late-filing fee merely for filing the return.
The applicable due date can differ depending on whether the taxpayer is subject to audit, transfer-pricing requirements or another category.
Therefore, taxpayers should always check the due date specifically applicable to them rather than assuming one common deadline for every return.
What Is a Belated ITR?
If a taxpayer was required to file a return but misses the original due date, the first return filed afterwards is generally called a Belated Return.
For AY 2026-27, the Income Tax Department confirms that a belated return can be filed up to:
31 December 2026 or before completion of assessment, whichever is earlier.
This is important because the transcript refers to 31 March 2027 for belated returns, which is not the correct AY 2026-27 deadline.
Late Filing Fee on Belated Return
Section 234F can impose:
| Total Income | Late Filing Fee |
|---|---|
| Up to ₹5 lakh | ₹1,000 |
| Above ₹5 lakh | ₹5,000 |
Interest can also apply where tax remains unpaid.
A belated return can also restrict the carry-forward of certain losses, making timely filing particularly important for taxpayers with business or capital losses.
For professional ITR filing assistance:
https://taxclear.in/itr-filing/
What Is a Revised ITR?
A Revised Return is used when an ITR has already been filed but the taxpayer later discovers an omission or mistake.
Examples include:
- Income was accidentally omitted;
- Incorrect deduction was claimed;
- Bank interest was missed;
- Capital gain was incorrectly reported;
- TDS details were entered incorrectly; or
- Some other information in the original return requires correction.
Both an original return and a belated return can generally be revised.
Revised Return Deadline for AY 2026-27
This is where AY 2026-27 introduces an important change.
From AY 2026-27 onwards, the revised-return period has been extended up to the end of the relevant assessment year.
Therefore, for AY 2026-27, a revised return can generally be filed until:
31 March 2027, subject to assessment not having been completed earlier.
New Fee for Revising After 31 December
The extended period is not completely free.
Where a revised return for AY 2026-27 is filed from 1 January 2027 to 31 March 2027, Section 234-I introduces an additional fee:
- ₹1,000 where total income does not exceed ₹5 lakh;
- ₹5,000 where total income exceeds ₹5 lakh.
Therefore, correcting a mistake before 31 December 2026 is financially preferable where possible.
Original vs Belated vs Revised Return
Consider three situations.
Situation 1: You file the return before your statutory due date.
This is an Original Return.
Situation 2: You miss the due date entirely and file your first return afterwards, but before 31 December 2026.
This is a Belated Return.
Situation 3: You already filed an original or belated return but later identify an error.
You can generally file a Revised Return, subject to the applicable deadline.
What Is an Updated Return or ITR-U?
An Updated Return, commonly called ITR-U, is different.
It provides an additional opportunity to voluntarily disclose income after the normal original, belated and revised-return windows have passed.
It is not meant to function as a normal correction mechanism for obtaining a larger refund or reducing tax.
An updated return generally cannot be used where it would:
- Reduce the total tax liability;
- Increase a refund;
- Create or increase a loss; or
- Otherwise produce a tax benefit prohibited under Section 139(8A).
Only one updated return for a particular assessment year can generally be filed.
How Long Do You Get to File ITR-U?
The updated-return window has been extended to 48 months from the end of the relevant assessment year under the applicable framework.
However, waiting longer makes the return considerably more expensive.
Additional Tax on Updated Return
Apart from normal tax, interest and other applicable amounts, additional income tax is payable.
| When ITR-U Is Filed | Additional Tax |
|---|---|
| Within first 12-month period | 25% |
| After 12 months up to 24 months | 50% |
| After 24 months up to 36 months | 60% |
| After 36 months up to 48 months | 70% |
These percentages apply to the prescribed aggregate of tax and interest, not simply to the amount of income being disclosed.
Therefore, ITR-U should generally be considered a last corrective opportunity, not a substitute for timely filing.
Can ITR-U Be Used to Claim a Missed Refund?
Generally, no.
Suppose you forgot to file your return and later discover that excess TDS had been deducted and you were entitled to a refund.
You cannot simply use ITR-U years later where filing the updated return would result in or increase a refund.
Similarly, ITR-U generally cannot be used to reduce an already reported taxable income merely because the taxpayer later discovers a deduction that was missed.
This is one of the biggest differences between a Revised Return and an Updated Return.
Can a Revised Return Reduce Tax?
Yes, where legally permissible.
A genuine mistake in an original or belated return can be corrected through a revised return. The corrected computation may result in:
- Higher income;
- Lower income;
- Higher tax;
- Lower tax; or
- A different refund,
subject to the normal provisions of the Income-tax Act.
ITR-U is considerably more restrictive because it is primarily designed to enable additional voluntary tax compliance.
Which Return Should You File?
| Situation | Appropriate Return |
|---|---|
| Filing within applicable due date | Original Return |
| Missed due date and no return filed yet | Belated Return |
| Already filed but discovered mistake | Revised Return |
| Normal correction period has expired and additional income needs disclosure | Updated Return / ITR-U |
The earlier a taxpayer identifies the issue, the more options generally remain available.
Why You Should Avoid Waiting for ITR-U
ITR-U is useful because it allows taxpayers to voluntarily correct significant omissions even years later.
But it comes at a cost.
Waiting can mean:
- Normal tax liability;
- Interest;
- Applicable late-filing consequences; and
- Additional tax of up to 70%.
Where an error can be corrected through a revised return within the permitted period, that route is generally much more efficient than waiting until an updated return becomes necessary.
For assistance with revised returns, belated returns, ITR-U or income-tax notices:
https://taxclear.in/legal-services/
FAQs
What is an Original ITR?
An original ITR is a return filed within the applicable due date under Section 139(1).
What is the last date for Belated ITR for AY 2026-27?
The belated-return deadline is 31 December 2026, or before completion of assessment, whichever is earlier.
What is the last date for Revised ITR for AY 2026-27?
A revised return can generally be filed up to 31 March 2027. However, filing after 31 December 2026 attracts the new Section 234-I fee.
Can a Belated ITR be revised?
Yes. A return originally filed under the belated-return provision can generally be revised within the permitted revised-return period.
How long is ITR-U available?
The updated-return framework permits filing for up to 48 months, subject to the prescribed conditions.
What is the additional tax on ITR-U?
Depending on how late the updated return is filed, additional tax can be 25%, 50%, 60% or 70% of the prescribed tax-and-interest amount.
Can I file ITR-U to claim a higher refund?
Generally, no. An updated return cannot normally be used where it would reduce the taxpayer’s tax liability or increase the refund.
