The Finance Act 2025 extended the time limit for filing an updated return under Section 139(8A) from 24 months to 48 months, with effect from 1 April 2025. The update also introduced two new tiers of additional tax for filings in the 36-to-48-month window. The change is bigger than it looks: many taxpayers who had already missed the old window are now back in eligibility, and the cost of using ITR-U has become steep enough to be its own deterrent.
What ITR-U is — and what it isn’t
An updated return under Section 139(8A) is a curative filing. It lets a taxpayer disclose income that was missed, correct the wrong head of income, change residential status, reduce a carried-forward loss or unabsorbed depreciation, or pay short tax that should have been paid earlier. Crucially, it cannot be used to reduce tax liability, claim a refund, increase a refund already claimed, or report a loss for the first time. If the original return showed a refund, ITR-U cannot be used to grow it.
The new 48-month window
Before Budget 2025, ITR-U could be filed within 24 months from the end of the relevant assessment year. Effective 1 April 2025, that window has been doubled to 48 months. In FY 2025-26, this means a taxpayer can file ITR-U for assessment years 2021-22 through 2024-25 — four open years instead of two.
The four-tier additional-tax structure
The cost of using ITR-U scales with how late the filing is. The additional tax is a percentage of the aggregate of the tax and interest payable on the additional income disclosed:
- Within 12 months from end of relevant AY — 25% additional tax
- 12 to 24 months — 50% additional tax
- 24 to 36 months — 60% additional tax (new tier added by Budget 2025)
- 36 to 48 months — 70% additional tax (new tier added by Budget 2025)
That is on top of the tax and interest already due. A taxpayer disclosing ₹10 lakh of additional income in the 48th month, on which the underlying tax+interest is ₹3 lakh, would also pay 70% × ₹3 lakh = ₹2.1 lakh as additional tax under Section 140B — total cash outflow ~₹5.1 lakh on the disclosure.
The reassessment trap
The Act includes a guard against using ITR-U to defang an in-flight reassessment. An ITR-U cannot be filed if a notice under Section 148A (show-cause notice for reassessment) has been issued after 36 months from the end of the relevant assessment year. However, if the assessing officer subsequently passes an order under Section 148A(3) holding that it is not a fit case for issuing a Section 148 notice, the taxpayer regains eligibility to file ITR-U within the 48-month window.
Practical implication: a 148A notice in months 37–48 closes the ITR-U door. A taxpayer who knows their year is on the audit risk list should not wait to use ITR-U.
When ITR-U is the right fix
- Foreign income forgotten in the original return. A salaried NRI or returning resident who left out interest from a foreign bank account, or a small foreign-listed equity holding, can disclose via ITR-U cleanly.
- Capital gains under-reported. A property or share-sale capital gain that didn’t make it into the original return.
- Wrong head of income. Income offered as “Other Sources” that should have been “Business” (or vice versa).
- Carried-forward loss reduction. If a loss was over-claimed in an earlier year, ITR-U is the channel to reduce it.
- Cleaning up before a high-stakes event — visa, immigration, large loan, exit due-diligence — where unfiled income comes out in disclosure.
When ITR-U is the wrong fix
- Refund situations. ITR-U cannot create or increase a refund. If the original return missed a TDS credit, a rectification under Section 154 or a condonation request is the right route.
- Reporting a loss for the first time. Losses must be reported in the original or belated return. ITR-U cannot establish a loss claim retrospectively.
- Reducing the income already reported. ITR-U is one-way — only upward.
- When a search or survey is in progress. If proceedings under Section 132 / 132A / 133A have been initiated for the year, ITR-U is barred for that year.
What we recommend
- Do a four-year review. Now that the window is 48 months, look back at AY 2021-22 onwards. Many clients had foreign-income disclosures, capital-gain pickups or interest TDS pickups they let lapse under the old 24-month limit.
- Run the cost-benefit before filing. The 70% additional-tax tier is a real number. Sometimes letting an old year sit is the rational call — but only if you’re confident the year won’t come up in scrutiny.
- File earlier in the window where possible. 25% in year one is a quarter the cost of 70% in year four.
- Coordinate with reassessment timing. If a 148A notice is even on the horizon for the year, file ITR-U before the notice is issued (where it’s past 36 months) — you lose the option once notice goes out.
- Document the trail. Keep the bank statements, foreign tax credits, capital-gain workings and source-of-funds proof in the file. ITR-U disclosures are flagged for follow-up scrutiny in some cases.
If you would like us to run a four-year retrospective review of your filings, write to [email protected] with your most recent ITR acknowledgement.
Sources
Talk to a partner.
A 30-minute call with a partner — no deck, no follow-up email blasts. Just a read on how this applies to your facts.