Most investors treat a losing position one of two ways: sell in frustration, or hold and hope it recovers. There's a third option that professional investors use constantly and retail investors rarely do — deliberately booking the loss to offset tax on gains elsewhere in the portfolio, a technique called tax-loss harvesting.
The basic mechanic
When you sell an investment at a loss, that loss isn't just a bad outcome to move past — under Indian tax rules, it can be set off against capital gains you've realized elsewhere, reducing your total taxable gain for the year. If you don't have enough gains to offset in the current year, unused capital losses can typically be carried forward for up to 8 subsequent assessment years, as long as you've filed your return on time.
Why the STCG/LTCG distinction matters here
Indian capital gains tax treats equity gains differently based on holding period: Short-Term Capital Gains (STCG, held under 12 months for listed equity) is taxed at one rate, and Long-Term Capital Gains (LTCG, held 12+ months) at a different, typically lower rate, with an annual exemption threshold. Losses generally have to be matched against gains of the same character — short-term losses can offset both short-term and long-term gains, but long-term losses can typically only offset long-term gains, not short-term ones. Getting this backward — realizing the wrong type of loss for the gain you're trying to offset — can mean the harvesting doesn't actually reduce your tax bill the way you expected.
A concrete example
Say you have a ₹1.5 lakh long-term gain on one fund this year, comfortably above the LTCG exemption threshold, and a separate holding sitting at a ₹40,000 long-term loss that you were planning to hold indefinitely, hoping for a recovery. Selling that losing position realizes the ₹40,000 loss, which offsets against the ₹1.5 lakh gain — reducing your taxable LTCG for the year and the tax owed on it. If you still believe in that investment's long-term prospects, you can typically repurchase it (there's no wash-sale rule in India of the kind the US has, though repurchasing resets your holding period back to zero for future LTCG qualification).
The part that trips people up: the holding period reset
Because there's no wash-sale restriction in India, tax-loss harvesting is more flexible here than in some other markets — but repurchasing the same investment immediately after selling it for a loss restarts its holding-period clock from zero. If you were close to crossing the 12-month LTCG threshold on that position, selling and immediately rebuying pushes you back to STCG status, which could mean a higher tax rate on future gains from that specific lot. Harvesting a loss makes the most sense either when you're not planning to immediately repurchase, or when you're comfortable resetting the holding period.
Why this is underused
Most retail investors only think about taxes once a year, at filing time, looking backward at what already happened — by then, the window to strategically realize a loss against a specific gain in the same financial year has often closed. Tax-loss harvesting requires looking at your portfolio proactively, usually in the final quarter of the financial year (January-March), specifically asking "do I have gains I could offset, and do I have losing positions I'm comfortable realizing?" That's a different, more deliberate habit than most casual investors ever build.
A word of caution
Don't let the tax tail wag the investment dog — a losing position should generally still be sold based on whether you'd buy it again today at its current price and outlook, not purely to generate a tax deduction. Tax-loss harvesting is most useful as a secondary consideration on a sale you were already leaning toward, not a reason to sell something you still have real conviction in.
Plan around your actual after-tax numbers
Once you understand how losses and gains interact, our Investment Goal Calculator can help you project your investing plan — just remember the return assumptions there are pre-tax, and your real-world outcome depends on managing gains and losses as deliberately as you manage your contributions.