F&O losses: set-off and carry-forward rules for FY26

Tax questions around derivatives keep trending because the rules are strict on timing and very specific on where losses can be adjusted. Recent Reddit threads and social posts broadly agree on one practical message - the classification of your trading activity decides both set-off flexibility and the carry-forward window. The discussion is especially active for FY 2025-26 and the transition to the Income-tax Act, 2025 from 1 April 2026.

Why F&O losses are treated differently from intraday

F&O losses are widely discussed as non-speculative business losses. That single label changes how easily the loss can be used in the same year. Many traders confuse F&O with intraday equity trading, which is treated as speculative. The speculative tag comes with tighter set-off limits and a shorter carry-forward window. Social posts repeatedly highlight that people often learn this only after filing season. The core takeaway is that F&O sits on the business-income side of the framework rather than the speculative bucket. As a result, the set-off options in the year of loss are broader for F&O than for intraday. But the benefit still comes with conditions and deadlines.

Same-year set-off for F&O - broad, but salary is excluded

For the year in which the F&O loss arises, the commonly shared rule is straightforward. You can set off a non-speculative business loss against income under any head except salary. This salary restriction is repeatedly linked to Section 71, with users noting Section 71(2) excludes salary from such adjustment. In practical terms, traders say the loss can reduce taxable rental income and interest income in the same year. Some posts also claim the loss can be set off against capital gains in the same year. The key nuance is timing - this flexibility is discussed for the same financial year, not for later years. If the loss fully absorbs other income heads (except salary), the taxable base for that year can fall materially. If it does not, the remaining loss moves into the carry-forward rules.

Carry-forward of F&O losses - 8 assessment years, but limited use later

Unabsorbed F&O loss can be carried forward for up to 8 assessment years. The carry-forward rule is repeatedly tied to Section 72 in community explanations. A recurring point is that the flexibility narrows once you move into future years. In carry-forward years, the loss can be set off only against business income, including future non-speculative business income. Traders often describe this as usable against future F&O profits and other business profits. Posts explicitly note it cannot be used against salary in later years either. They also state it cannot be used against rent, interest, or capital gains in future years, because those heads are only available for same-year set-off. The hard stop is also emphasized - any unabsorbed amount after the 8-year window cannot be claimed in the ninth year.

The deadline trap - file on time or lose the carry-forward

The most repeated warning online is not about classification but compliance. Carry forward is allowed only if you file your return by the original due date under Section 139(1). Multiple posts frame this as unforgiving, because late filing permanently forfeits the right to carry forward that year’s losses. Traders specifically mention ITR-3 as the relevant return form used in these discussions for F&O reporting. Community answers often cite the commonly discussed due dates of 31 July for non-audit cases and 31 October for audit cases. The practical advice circulating is to file even if your loss figure is provisional, rather than miss the deadline. People also emphasise that being late by even one day can break the carry-forward benefit. For active traders, this deadline rule is presented as more important than optimising set-off within the year.

Quick comparison table - what traders are summarising

Below is a consolidated snapshot based on the points repeatedly shared in the trending threads. It reflects how users are distinguishing F&O, intraday, and capital losses while discussing set-off and carry-forward windows. It also captures the key limitation that salary is not available for same-year set-off of business losses. The table is not a substitute for professional advice, but it matches the framework traders are referencing. Social posts also mention specified business loss under Section 35AD as a separate category with its own restrictions. Traders use these comparisons to avoid mixing up business-loss rules with capital-loss rules.

What changes from 1 April 2026 - and what does not

A major discussion driver is the shift to the Income-tax Act, 2025 from 1 April 2026. The message circulating among retail traders is that the substantive rules on set-off and carry forward of stock market losses are unchanged. Posts specifically cite Section 536 of the new Act as a repeal and savings clause. The key point in those posts is that capital losses brought forward from before 1 April 2026 continue to be set off in the manner provided earlier under the old Section 74. Users summarise this in plain language - LTCL remains adjustable only against LTCG, while STCL can be adjusted against both STCG and LTCG. They also say the 8-year and 4-year windows continue as before. The filing-by-due-date gate is also described as continuing. For most F&O traders, online commentary frames this transition as more of a re-codification than a rewrite.

Common confusion points - salary, speculative profits, and capital gains

The salary exception is the most frequent correction offered in comment threads. Traders often ask whether an F&O loss can reduce salary tax, and the common answer is no. Another confusion is whether F&O losses can be set off against speculative income such as intraday equity trading profits. Posts often say this is not allowed, because speculative and non-speculative buckets do not freely mix for set-off. A third area of confusion is capital gains, where users tend to mix same-year set-off with carry-forward-year restrictions. Several posts claim F&O losses can set off capital gains in the same year, but not in later years after carry forward. For capital losses, users share the basic split - LTCL cannot be set off against STCG. The discussions also highlight that after the 8-year window, unabsorbed losses lapse. Net-net, the threads suggest most mistakes are caused by mixing categories rather than calculating the loss itself.

Corporate and startup edge cases that also surfaced

Alongside retail queries, some posts discuss carry-forward restrictions for closely held companies. The shared rule is that losses of a closely held company may not be carried forward unless at least 51% voting power is held by the same persons on the relevant dates. Those dates are described as the last day of the year in which the loss was incurred and the last day of the year in which it is set off. Eligible start-ups are discussed as having an alternative relaxation route in online explanations. The posts describe two conditions - continued 51% shareholding or continued 100% shareholders - for allowing carry forward and set-off. The start-up loss period is described as losses incurred during 10 years beginning from the year of incorporation. These points are usually raised to show that entity type can add additional gates beyond the general set-off framework. For most individual F&O traders, however, the dominant themes remain classification, the salary exception, and the on-time filing requirement.