Belated, Revised or Updated Return? ITR-U Rules to 31 Dec 2026

Missed the original deadline of 31 July 2026 for AY 2026-27, or spotted a mistake in the return you already filed? The law gives you three rescue routes — the belated return, the revised return and the updated return (ITR-U). Each has different deadlines, costs and limits, so this guide compares them and helps you pick the right one.

New law note: From 1 April 2026, the Income-tax Act, 2025 replaces the Income-tax Act, 1961. Returns for FY 2025-26 (AY 2026-27) are still filed under the 1961 Act with ITR-1 to ITR-7, so the section numbers used in this guide remain the ones for that filing. From tax year 2026-27, provisions carry new numbers (for example, Section 80C becomes Section 123 and Section 87A becomes Section 156) and key forms change (Form 16 becomes Form 130 and Form 26AS becomes Form 168), while proceedings for earlier years continue under the 1961 Act. See the complete mapping in our Income-tax Act 2025 section and form mapping guide.

Route 1: belated return under Section 139(4) (belated return, Section 263(4) of the Income-tax Act, 2025)

A belated return is for taxpayers who missed the original or extended due date. It can be filed any time before 31 December of the assessment year — so for AY 2026-27, the window closes on 31 December 2026. Filing late costs a fee under Section 234F (late-fee provision renumbered under the Income-tax Act, 2025): ₹5,000 where total income exceeds ₹5 lakh, and ₹1,000 where it does not. Remember two limits: losses other than house property loss cannot be carried forward from a belated return, and any interest under Sections 234A and 234B keeps running until you pay.

Route 2: revised return under Section 139(5) (revised return, Section 263(5) of the Income-tax Act, 2025)

A revised return corrects a return that was already filed — wrong TDS credit, missed deduction, forgotten interest income or a misreported capital gain. It can be filed until 31 December of the assessment year (31 December 2026 for AY 2026-27), and you can revise as many times as you like before that date. You must quote the acknowledgement number of the original return, and the revision supersedes it entirely. Filing a revision takes minutes on the e-filing portal: open the relevant assessment year under View Filed Returns, choose the option to file a revised return, quote the original acknowledgement number and submit the corrected figures.

After the return has been processed, revision is still possible so long as no assessment has been completed for that year. If the department has already picked the return for scrutiny and finished the assessment, the door closes. A revised return can also raise or reduce a refund — this flexibility is unique to the revision route.

Route 3: updated return (ITR-U) under Section 139(8A) (updated return under Section 263 of the Income-tax Act, 2025)

Missed both deadlines? The updated return lets you file even further behind, within 48 months from the end of the assessment year. The additional tax sits on top of the tax and interest already payable on the updated income, which makes filing the update early materially cheaper than waiting:

ITR-U comes with hard restrictions. It is not allowed for loss returns, for returns that increase the refund or reduce the tax liability, or where the updated computation results in nil tax. It cannot be filed once scrutiny or assessment proceedings for that year have begun, and it is filed using the special ITR-U annexure along with the relevant ITR form.

Which route should you use?

Before choosing, compute the corrected liability with the income tax calculator — especially where a missed capital gain is involved, using the capital gain tax calculator. The ITR-U additional tax can make voluntary disclosure expensive, so knowing the exact amount due first changes which route is cheaper. A revised or belated route, where still open, is almost always the less costly one.

Key takeaways

• Belated return for AY 2026-27: file by 31 December 2026 with a 234F fee of ₹1,000 or ₹5,000.
• Revised returns are unlimited in number until 31 December of the AY, and remain possible after processing if no assessment has closed.
• ITR-U reaches back 48 months but adds 25%, 50% or 60% tax on the tax-and-interest due, by the age of the update.
• ITR-U cannot create losses, claims refunds or lower tax, and stops once assessment begins.
• Always quote the original acknowledgement number when revising.

Frequently asked questions

Can I file a belated return after 31 December 2026 for AY 2026-27?

No. After the belated window closes, the only way in is the updated return under Section 139(8A), with the applicable additional tax of 25% to 60% depending on how much time has passed.

Can a revised return claim a bigger refund?

Yes. A revised return under Section 139(5) can correct any error in either direction, including a larger refund claim, as long as it is filed before 31 December of the assessment year and no assessment has been completed.

Can I file ITR-U more than once for the same year?

Yes. Multiple updated returns are permitted for the same assessment year, but each filing carries the additional tax applicable at that time, so the cost escalates with every later update.

Does a belated return lose any benefits?

Losses other than loss from house property cannot be carried forward from a belated return. Refunds, TDS credits and the regime choice otherwise work normally, and the 234F fee is the main extra cost.

Where do I get help picking a route?

The deadline and cost trade-offs are easy to get wrong when large amounts are involved. An income tax consultant can check whether revision, belated filing or ITR-U is cheaper and whether any assessment proceedings block a route.

Disclaimer: Tax laws change frequently. Verify current rates and deadlines on the official portals (incometax.gov.in, gst.gov.in) or consult a qualified professional before acting.