Capital Loss Set-Off & Carry Forward Rules 2026: Why Your Long-Term Loss Can't Cancel a Short-Term Gain

By Nitish Bharadwaj · Published Aug 8, 2026 · 6 min

Short-term capital loss can be set off against both short-term and long-term capital gains, but long-term capital loss can only be set off against long-term gains — never a short-term gain, even from the same asset class. Unused losses carry forward for 8 assessment years under Section 74, but only if the ITR is filed by the original due date; a belated return forfeits the benefit entirely. This guide also clarifies a draft 2025 reform that didn't make it into the final law.

Sell a stock at a loss in March hoping to offset the taxable gain booked on a mutual fund redemption in June, and there's a good chance the two won't fully cancel out — not because of any anti-abuse rule, but because of which 'type' of loss and gain are being paired. Capital loss set-off runs on stricter logic than most other tax rules, and getting the pairing wrong is one of the most common reasons investors overpay tax they didn't need to.

The Rule That Surprises Most Investors — LTCL Can't Touch a Short-Term Gain

Capital losses split into two buckets that mirror the gains they came from: short-term capital loss (STCL) and long-term capital loss (LTCL). STCL is flexible — it can be set off against both short-term capital gains (STCG) and long-term capital gains (LTCG) in the same year. LTCL is one-directional: it can only be set off against LTCG, never against STCG. So a ₹1 lakh long-term loss on a stock held for two years cannot reduce the tax on a ₹1 lakh short-term gain from a stock sold within six months — even though both are, in plain English, losses and gains from selling shares.

The Reform That Was Announced, Then Quietly Dropped

It Carries Forward for 8 Years — But Only If the ITR Is Filed on Time

Unused capital losses don't vanish at the end of the financial year. Under Section 74, both STCL and LTCL can be carried forward for up to 8 assessment years and set off against eligible gains in those future years, following the same STCL-flexible, LTCL-restricted rule each time. The catch is a filing deadline, not a computation one: Section 80 conditions this carry-forward benefit on filing the ITR before the original due date under Section 139(1) — July 31 for most individuals, or the extended audit deadline where applicable. File a belated return under Section 139(4) instead, and the right to carry the loss forward is lost entirely, even though the loss itself was real and correctly computed. House property loss and unabsorbed depreciation are the two exceptions that survive a belated filing; capital losses are not one of them.

It Stays Inside the Capital Gains Head — No Set-Off Against Salary

Capital losses can only be set off against capital gains — they cannot reduce taxable salary, business income, or interest income under any circumstances, current or carried-forward. This is a stricter version of the general inter-head set-off rules that apply elsewhere in the tax code; house property losses, for instance, can be set off against salary income up to ₹2 lakh a year, which is part of why Section 24(b)'s let-out property loss rules work so differently from capital loss rules.

Why the 12.5% LTCG Rate Makes This Worth Planning Around

Since Budget 2024, most long-term capital gains — on equity above the ₹1.25 lakh exemption, on debt mutual funds, and on real estate — are taxed at a flat 12.5% without indexation, for transfers made on or after July 23, 2024. Property bought before that date retains the choice of the older 20%-with-indexation regime if it produces a lower tax outright. Because LTCG across nearly every asset class now sits in the same rate bucket, an LTCL from one asset — say, a losing debt fund — can meaningfully offset an LTCG from a completely different one, like a profitable equity sale or a gold ETF redemption, as long as both are long-term. Our capital gains tax on mutual funds guide breaks down the equity/debt split in more detail, and the Sovereign Gold Bond capital gains guide covers how SGB gains fit into this same LTCG bucket.

1. Separate every sale in the financial year into STCG, LTCG, STCL, and LTCL before assuming any two will offset each other.
2. Match LTCL only against LTCG — from any asset class, not just the one that generated the loss — and use STCL more freely since it works against both.
3. File the ITR before July 31, or the applicable due date, if carrying forward any unused loss — a belated return forfeits it entirely.
4. Track carried-forward losses year to year on the ITR's Schedule CFL; the 8-year clock runs from the year the loss was first incurred, not from when it's first used.
5. Self-employed or variable-income taxpayers should factor expected capital losses into their advance tax estimate rather than waiting for ITR filing to reconcile everything.

Booking a loss deliberately to offset a gain — commonly called tax-loss harvesting — only works if the STCL/LTCL pairing is right and the return is filed on time. Get either wrong, and the loss either fails to offset what was hoped for, or disappears at the carry-forward stage before there's a chance to use it at all. Investors who've tendered shares into a company buyback since October 2024 generate a capital loss this same way, almost without realising it — buyback proceeds are now taxed as dividend income, and the original cost of those shares survives only as a capital loss that follows every rule on this page, but can never be used to offset the dividend tax charged on the buyback itself.