Found an old interest certificate, a missed capital gain, or a freelance payment you never showed? You do not have to wait for the tax department to catch it. Section 139(8A) lets you file an updated return (ITR-U) and come clean voluntarily — but it comes with an extra layer of tax that grows the longer you wait. The bottom line: if you genuinely owe more tax for a past year, filing ITR-U early is almost always cheaper than filing it late, and far cheaper than being caught.
Since the Finance Act 2025, you can now go back four years (48 months from the end of the assessment year) instead of two. That is a wider safety net, but the price of using the later years is steep. This guide explains exactly how much extra you pay in each of the four tiers, works through the rupee cost with a real example, and flags the situations where ITR-U is simply not allowed. You can estimate your own liability with our ITR-U Calculator before you file.
What ITR-U is — and what it is not
An updated return is a mechanism to voluntarily report additional income that you left out of your original, belated or revised return. It is not a tool to reduce your tax, claim a fresh refund, or turn a profit into a loss. The whole design is one-directional: ITR-U can only increase your tax liability. If the correction would lower your tax or increase a refund, you cannot use ITR-U at all.
You can file ITR-U whether or not you filed an original return for that year. Someone who never filed at all can still regularise a year through ITR-U, provided the other conditions are met. Only one updated return is allowed per assessment year — you cannot keep updating an update.
The four additional-tax tiers
The extra tax under Section 140B is charged on the aggregate of the additional tax and the interest payable on the unreported income (interest under Sections 234A, 234B and 234C, plus any late-filing fee under 234F where relevant). The rate depends purely on when you file, measured from the end of the relevant assessment year:
| When you file ITR-U | Additional tax | Charged on |
|---|---|---|
| Up to 12 months from end of AY | 25% | Additional tax + interest |
| After 12, up to 24 months | 50% | Additional tax + interest |
| After 24, up to 36 months | 60% | Additional tax + interest |
| After 36, up to 48 months | 70% | Additional tax + interest |
Note that this additional tax is over and above the normal tax and interest — it is not a discount on them. The 25% in the first tier, for instance, is an extra 25 paise for every rupee of tax-plus-interest you should have paid in the first place.
Which years are open right now
Because the window is 48 months from the end of the assessment year, the years currently open for ITR-U (as of mid-2026) are AY 2022-23, AY 2023-24, AY 2024-25 and AY 2025-26. AY 2021-22 closed on 31 March 2026. A useful way to see the tier you fall into: AY 2024-25 (which ended 31 March 2025) is now in its second year, so it attracts 50%; AY 2023-24 is in its third year at 60%; AY 2022-23 is in its fourth and final year at 70%.
Worked example: the cost of waiting
Take Ravi, a salaried professional in the 30% slab. While tidying up his records he realises he never reported Rs. 5,00,000 of consultancy income for a past year. The tax on that income works out to Rs. 1,56,000 (30% plus 4% cess), and the interest under Sections 234B and 234C comes to roughly Rs. 24,000. So his base for the additional tax is Rs. 1,80,000. Here is what that same base costs Ravi depending on which tier he files in:
| Tier | Tax + interest (base) | Additional tax | Total payable via ITR-U |
|---|---|---|---|
| Year 1 — 25% | Rs. 1,80,000 | Rs. 45,000 | Rs. 2,25,000 |
| Year 2 — 50% | Rs. 1,80,000 | Rs. 90,000 | Rs. 2,70,000 |
| Year 3 — 60% | Rs. 1,80,000 | Rs. 1,08,000 | Rs. 2,88,000 |
| Year 4 — 70% | Rs. 1,80,000 | Rs. 1,26,000 | Rs. 3,06,000 |
The income, the tax and the interest never change — only the penalty tier does. Filing in year four instead of year one costs Ravi an extra Rs. 81,000 for the identical disclosure. That is the single most important takeaway: procrastination on ITR-U is expensive in a very literal, calculable way. Because interest under 234B keeps accruing month on month as well, the true gap is even wider than the table suggests. You can model your own figures, including the interest component, with our 234A/234B/234C Interest Calculator.
When you cannot file ITR-U
ITR-U is a privilege for honest voluntary disclosure, so the law shuts the door in situations where the department is already on the case or where the update would benefit you rather than the exchequer. You cannot file an updated return if any of the following apply:
| Situation | Why it is blocked |
|---|---|
| The update reduces your total tax, or is a loss return, or increases a refund | ITR-U can only increase liability |
| A search under Section 132 or requisition under 132A has been initiated against you | Enforcement action already begun |
| A survey under Section 133A (other than 133A(2A)) has been conducted | Enforcement action already begun |
| Assessment, reassessment, revision or re-computation is pending or completed for that year | Proceedings already on foot |
| An updated return has already been filed for that assessment year | Only one ITR-U per year |
The Section 148A restriction added in 2025
The Finance Act 2025, which extended the window to four years, also added a guard against misuse of the two extra years. If a show-cause notice under Section 148A (the pre-reassessment enquiry stage) has been issued to you after 36 months from the end of the assessment year, you cannot file an ITR-U for that year. The one exception: if the Assessing Officer later passes an order under Section 148A(3) holding that it is not a fit case for reassessment, the block lifts and you may file. In plain terms, once the department has formally started looking at a year in its third or fourth window, the voluntary route closes unless they themselves decide to drop it.
How to file, step by step
Filing ITR-U is done through the regular ITR form applicable to you (ITR-1 to ITR-4, etc.) with an additional Part B-ATI schedule and the ITR-U form attached. In practice: pick the correct ITR form for the year, report the additional income under the right head, select the reason for updating (income not reported earlier, wrong head, reduction of carried-forward loss, etc.), let the utility compute the additional tax under Section 140B, pay it as a self-assessment challan, and then file and e-verify. The additional tax must be paid before you file — an ITR-U without full payment of the 140B liability is itself defective.
Key takeaways
- ITR-U (Section 139(8A)) lets you voluntarily report missed income for up to 48 months from the end of the assessment year — four years, since the Finance Act 2025.
- The extra tax is 25% / 50% / 60% / 70% of the additional tax plus interest, rising with each 12-month band. Filing early can save tens of thousands on the same disclosure.
- ITR-U can only increase your tax — it cannot create or increase a refund, report a loss, or reduce liability.
- It is blocked once a search, survey, or assessment/reassessment is underway, and — new in 2025 — where a Section 148A notice has been issued after 36 months.
- Pay the full Section 140B additional tax before filing, or the updated return is treated as defective.
Frequently Asked Questions
Can I file ITR-U to claim a refund I forgot?
No. An updated return can never be used to claim or increase a refund, or to reduce your tax. It is strictly for reporting additional income that raises your liability. If you missed a genuine deduction, ITR-U is not the route.
I never filed a return for that year. Can I still use ITR-U?
Yes. A non-filer can file ITR-U for a year they skipped, as long as the year is within the 48-month window and none of the blocking conditions apply. You will pay the normal tax, interest, the Section 234F late fee, and the applicable additional-tax tier.
How is the additional tax calculated exactly?
First compute the normal tax on the additional income and the interest under Sections 234A/234B/234C (and 234F fee). The additional tax is then 25%, 50%, 60% or 70% of the tax-plus-interest figure, depending on your tier. Our ITR-U Calculator does this automatically once you enter the income and the year.
What happens if I do not disclose and the department finds it later?
You lose the ITR-U option and face regular reassessment under Sections 147/148, where the exposure includes tax, interest, and a penalty of up to 200% of the tax on under-reported or mis-reported income — far worse than any ITR-U tier, plus possible prosecution in serious cases.
Is there any tier cheaper than 25%?
No. Twenty-five percent is the lowest additional-tax band and applies only in the first 12 months. There is no zero-penalty ITR-U. If you are still within the original belated/revised return deadline (31 December of the assessment year), file a normal revised return instead — that carries no additional tax at all.