Belated and Revised Returns for F&O Traders: Deadlines, Costs and Loss Carry-Forward
Note: This is general information, not tax advice, and tax rules change. Verify the current figures against the Income Tax Act, the relevant Finance Act and ICAI guidance, and confirm your own position with a qualified Chartered Accountant.
The original and belated return timeline
For most individuals (non-audit cases), the original ITR due date is July 31. For traders who need a tax audit (under 44AB or 44AB(e)), the due date is October 31. After those dates, you can still file a belated return up to December 31 of the assessment year. After December 31, you cannot file at all without a notice from the department.
The loss carry-forward rule: the biggest cost
Section 80AC requires that to carry forward a business loss, the return must be filed on or before the original due date. If you file late (even one day), you permanently lose the right to carry forward that year's F&O loss to the next 8 years.
The same rule applies to intraday speculative losses. The only exception: if you have a loss in a segment that does not carry forward anyway (for example, STCG and LTCG can be carried forward from belated returns under certain rules), the stakes are different. But for F&O and intraday, the on-time filing rule is strict.
Interest on late filing and unpaid tax
Section 234A charges interest at 1% per month on any unpaid tax from the original due date until you file. If you owed ₹50,000 tax and file 4 months late, the interest is ₹50,000 x 1% x 4 = ₹2,000. For traders with large tax bills, this compounds quickly.
234B and 234C (advance-tax interest) are separate from 234A. They accrue during the year on underpaid advance tax. If you are also late filing, all three interest charges stack. See advance tax for traders for how to avoid 234B and 234C.
When to file a revised return
File a revised return (Section 139(5)) when you have already filed but discover an error: missed income, wrong figure, incorrect TDS claim, or a wrong regime choice. You can revise up to December 31 of the assessment year, the same window as the belated deadline.
Common reasons traders revise:
- Received an AIS mismatch after filing and found a genuine discrepancy
- Got a corrected P&L from the broker after the original filing
- Discovered they missed a dividend or interest income item
- Chose the wrong tax regime and want to switch before December 31
Practical steps if you missed the deadline
If you are past July 31 and have not filed:
- File immediately. Every extra month adds 234A interest.
- Accept that F&O and intraday losses this year cannot be carried forward.
- Pay any outstanding tax with the belated filing to stop the 234A clock.
- Get the audit done first if you need one (audit cases: original due October 31, belated window November 1 to December 31).
For future years: use Aktai Tax year-round so your numbers are ready well before July, rather than scrambling in the last two weeks. The ITR deadline calendar has all dates for the current assessment year.
Frequently asked questions
What is the difference between a belated and a revised return?
A belated return is filed after the original due date (July 31 for non-audit cases) and before December 31 of the assessment year. A revised return is filed when you want to correct an already-filed return. You can file a revised return before December 31 of the assessment year, regardless of whether the original was on time or belated.
Can I carry forward my F&O loss if I file a belated return?
No. This is the most important rule for traders. F&O losses can only be carried forward if the return is filed on or before the original due date. A belated return (filed after July 31, or after October 31 for audit cases) forfeits the loss carry-forward for that year. You can still set off the loss against income in the current year, but you lose the 8-year carry-forward window.
What is the penalty for late filing?
Under Section 234F, the late filing fee is ₹5,000 if total income exceeds ₹5 lakh, or ₹1,000 if total income is ₹5 lakh or below. This is in addition to interest under 234A on unpaid tax. For large-loss traders, the actual cost is the forfeited carry-forward, which can far exceed the ₹5,000 penalty.
What is the last date to file a belated return for AY 2026-27?
The belated return deadline for AY 2026-27 (FY 2025-26) is December 31, 2026, subject to any CBDT extension. Check the income-tax portal for the current deadline. Audit cases have an original due date of October 31, 2026, and the belated window applies from November 1 to December 31.
Can I revise a belated return?
Yes, from AY 2017-18 onward, a belated return can be revised. You can correct mistakes in a belated return by filing a revised return before December 31 of the assessment year, the same deadline as revising a timely return.