Tax-Loss Harvesting in Mutual Funds India 2026: How to Use the ₹1.25 Lakh LTCG Exemption Before March 31

Every March, a familiar pattern shows up in equity mutual fund portfolios: gains sitting comfortably under the ₹1.25 lakh LTCG exemption, and losses sitting untouched in a different fund a few percent below the purchase price. Left alone, both quietly expire — the unused exemption resets to zero on April 1, and the loss just keeps aging inside a portfolio that never sells it. Tax-loss harvesting is the deliberate, entirely legal act of fixing both in the same afternoon.

What Tax-Loss Harvesting Actually Means

The mechanics are simple: sell a fund or stock sitting on an unrealised loss before the financial year ends, book that loss for tax purposes, and reinvest the proceeds — often into a similar fund from a different AMC — to keep the money working in the market. The loss then offsets a taxable gain elsewhere in the same year, or gets carried forward if there's nothing to offset yet. Nothing about the underlying investment strategy needs to change; only the tax treatment of gains already sitting in the portfolio does.

The ₹1.25 Lakh Exemption Is a Use-It-or-Lose-It Allowance

Long-term capital gains on equity and equity mutual funds carry an annual exemption of ₹1.25 lakh — the first ₹1.25 lakh of LTCG in a financial year is entirely tax-free, with anything above taxed at 12.5%. That exemption doesn't carry forward. A ₹40,000 unused allowance this March is gone by April, permanently. The harvesting move here is different from loss-booking: it means selling winning positions with unrealised long-term gains up to that ₹1.25 lakh ceiling, even without any plan to exit the investment, and simply reinvesting the proceeds — resetting the purchase cost higher while paying zero tax on the gain booked.

No Wash-Sale Rule in India — But Dividend Stripping Is a Real Trap

Unlike the US, India has no blanket wash-sale rule stopping an investor from selling a fund at a loss and immediately buying back an identical or near-identical one — the loss is valid even if the replacement purchase happens the same day. Where the law does step in is dividend and bonus stripping under Section 175 of the Income-tax Act, 2025 (earlier Sections 94(7) and 94(8)): buying a unit shortly before a record date and selling shortly after specifically to book a loss around a dividend payout or bonus allotment gets that loss disallowed up to the dividend received, or the cost adjusted for bonus units. Ordinary loss harvesting on a fund with no dividend or bonus event around the sale date isn't affected by either provision.

Debt Funds Follow the Same Logic, at a Different Rate

The same harvest-and-reinvest logic applies to debt mutual funds, though the tax rate depends on when the units were bought. Units purchased on or after April 1, 2023 are taxed entirely as income at the investor's slab rate regardless of holding period — no LTCG concept applies to them at all — so a loss on those units offsets other gains only under the short-term rules. Units bought before that date can still qualify for the older 12.5% LTCG treatment without indexation if held over 24 months. Our capital gains tax on mutual funds guide breaks down the full equity-versus-debt split in more detail.

The Filing Deadline That Makes or Breaks the Carry-Forward

A harvested loss that isn't fully used against a gain in the same year doesn't disappear — it carries forward for up to 8 tax years under Section 111 of the Income-tax Act, 2025 (earlier Section 74). But that benefit is conditional on filing the ITR before the original due date under Section 263(1) (earlier Section 139(1)) — a condition set by Section 121 of the 2025 Act — typically July 31 for non-audit individuals. File a belated return instead, and the right to carry the loss forward is lost even though the loss itself was real and correctly computed. Our detailed breakdown of capital loss set-off and carry-forward rules covers the STCL-versus-LTCL pairing rules that decide which gains a carried-forward loss can actually offset.

A Worked Example

An investor has already booked ₹1.6 lakh of long-term gains this year, and holds a mid-cap fund (held over 12 months) down ₹35,000 from its purchase price. Selling the mid-cap fund books a ₹35,000 long-term loss, which is set off against those gains, cutting net LTCG to ₹1.25 lakh — fully covered by the ₹1.25 lakh exemption. Without the sale, that ₹35,000 would have been taxed at 12.5%, so harvesting saves ₹4,375 plus cess. Set-off is mandatory, so this only pays when gains exceed the exemption; if your gains are under ₹1.25 lakh, a loss simply wastes exemption headroom. Any loss left over after set-off is carried forward if the return is filed on time, but it is set off against a future year's long-term gain before that year's ₹1.25 lakh exemption is applied, so it can also eat into that exemption; carrying it forward pays mainly if you expect future gains well above ₹1.25 lakh. Reinvesting the proceeds immediately, into similar but not identical funds to sidestep any dividend-stripping ambiguity, keeps the portfolio's market exposure essentially unchanged.

Before March 31

1. Pull a consolidated account statement and sort every holding into unrealised STCG, LTCG, STCL, and LTCL — most fund platforms and RTAs (CAMS, KFin) can generate this directly
2. Check how much of the ₹1.25 lakh LTCG exemption is already used from gains booked earlier in the year, before deciding how much more to harvest
3. Book losses first against any taxable gains already realised this year, then consider gain-harvesting up to the remaining exemption
4. Confirm no dividend or bonus record date falls within a few weeks of the sale to avoid a Section 175 disallowance
5. Reinvest promptly into a comparable but not identical fund if the goal is to preserve market exposure while resetting the cost base
6. File the ITR by July 31, or the applicable due date, if any loss needs to carry forward — a belated filing forfeits that right permanently

Harvesting only touches capital gains booked on sale — it has no bearing on dividend or IDCW payouts, which a fund house withholds tax on separately, before the money even reaches you. Our guide to Section 194K covers that TDS mechanism for anyone holding the Dividend or IDCW option alongside Growth-option funds being harvested here.

None of this is a loophole — it's simply using an exemption and a carry-forward rule that already exist in the tax code, on a timeline that requires acting before the financial year closes rather than after. The investors who lose out aren't doing anything wrong; they're just leaving a decision to April that only pays off in March.