Tax-loss harvesting by March 31: How to turn your losses from stocks, mutual funds into tax savings

Look at your portfolio right now. If it’s staring back at you in red, you’re not alone. The Indian equity markets have had a turbulent ride over the past several months, and millions of retail investors are sitting on unrealised losses across their stocks and mutual funds. But here’s what most investors don’t know: those losses are not just painful, they are the foundation of a powerful tax strategy called tax-loss harvesting.

Tax-loss harvesting is the strategy that seasoned investors use to convert portfolio losses into real, tangible tax savings. Done right, it can save you money before the financial year closes on March 31. Done wrong — or not done at all — and you’ve left money on the table.

Let’s understand what tax-loss harvesting is and how it works, starting from the basics and moving to the fine prints.

What is tax-loss harvesting?

At its core, tax-loss harvesting is simple. You sell investments that are currently trading at a loss, use those realised losses to offset gains you have made elsewhere in your portfolio, and thereby reduce the capital gains tax you owe for the year.

The key word here is realised. The Income Tax Department does not recognise notional or paper losses — the ones sitting on your demat account but never actually booked. You have to sell the investment before March 31, 2026, to crystallise the loss and make it count for that financial year.

Tax-loss harvesting in 2026 is a math exercise, not a ritual. The decision is now more mathematical than it used to be — estimate your gross tax saving, then subtract your unavoidable costs. If the savings are clearly larger, harvesting makes sense. If not, leave the portfolio alone.

Short-term and long-term capital gains: Tax rules you need to know first

Before you execute any harvesting strategy, you need to understand what you’re working with.

Short-Term Capital Gains (STCG): If you have held a stock or equity mutual fund for 12 months or less, profits on sale are classified as STCG and taxed at 20% — revised upward from 15% after the July 2024 Budget amendments.

Long-Term Capital Gains (LTCG): Hold the same assets for more than 12 months, and gains are classified as LTCG, taxed at 12.5%. Critically, there is an annual exemption of ₹1.25 lakh on LTCG from equity and equity mutual funds — meaning your first ₹1.25 lakh of long-term profits in a financial year is entirely tax-free.

Equity short-term capital gains are taxed at 20% for transfers on or after July 23, 2024. Equity long-term capital gains under Section 112A are taxed at 12.5%, but only on gains above ₹1.25 lakh.

These rates matter enormously when you’re calculating whether harvesting is worth the effort.

How the tax loss harvesting works: A detailed example

Let’s walk through a realistic scenario for a typical retail investor in FY 2025-26.

Investor Profile: Suppose A, a salaried professional in Mumbai, has been investing in equities and mutual funds for several years. Here’s a snapshot of his portfolio as of mid-March 2026:

Investment	Type	Purchase value	Current value	Gain/Loss	Holding period
Nifty 50 Index Fund	MF	₹8,00,000	₹10,50,000	+₹2,50,000	26 months
IT sector fund	MF	₹4,00,000	₹3,20,000	-₹80,000	18 months
Midcap stock A	Equity	₹2,00,000	₹2,60,000	+₹60,000	8 months
Smallcap stock B	Equity	₹1,50,000	₹1,10,000	-₹40,000	10 months
F&O trading	Business	–	–	-₹50,000	FY loss

Scroll right to view full table →

Without tax-loss harvesting:

• LTCG from Nifty Fund: ₹2,50,000 → Taxable portion after ₹1.25 lakh exemption: ₹1,25,000 → Tax at 12.5% = ₹15,625
• STCG from Midcap Stock: ₹60,000 → Tax at 20% = ₹12,000
• Total tax outgo: ₹27,625

With tax-loss harvesting:

A decides to sell the IT sector fund (LTCG loss of ₹80,000) and smallcap stock B (STCG loss of ₹40,000) before March 31.

Now the picture changes:

• LTCG from Nifty Fund: ₹2,50,000
• Less: LTCG loss from IT Sector Fund: ₹80,000
• Net LTCG: ₹1,70,000
• Less: ₹1.25 lakh exemption: ₹1,70,000 – ₹1,25,000 = ₹45,000 taxable → Tax at 12.5% = ₹5,625
• STCG from Midcap Stock: ₹60,000
• Less: STCG loss from Smallcap Stock B: ₹40,000
• Net STCG: ₹20,000 → Tax at 20% = ₹4,000
• Total tax outgo after harvesting: ₹9,625

Tax saving: ₹18,000 — simply by booking losses that were already sitting in his portfolio.

And A doesn’t have to abandon those positions permanently. He can reinvest the proceeds from the sold funds into similar (but not identical) alternatives and stay invested in the market.

Run your portfolio through the Tax Harvesting Calculator to see gains, losses, and how much tax you could save by harvesting smartly.

The set-off hierarchy: What can be offset against what?

This is where many investors make mistakes. Not all losses can be netted against all gains. India’s tax code has a precise pecking order.

Short-term capital losses (STCL): Can be set off against both STCG and LTCG. This gives STCL the most flexibility.

Long-term capital losses (LTCL): Can only be set off against LTCG — not against STCG or any other income. This is a critical constraint.

F&O losses (non-speculative business loss): F&O is classified as a non-speculative business under the Income Tax Act. These losses can be set off against any income head except salary — including capital gains from stocks and mutual funds — within the same financial year.

Intraday (speculative) losses: These can only be set off against speculative (intraday) profits. You cannot use your day-trading losses to reduce your mutual fund gains.

Carry-forward rules:

• Short-term and long-term capital losses: Carry forward for up to 8 assessment years
• Speculative business losses: Carry forward for up to 4 assessment years
• Condition: You must file your ITR by July 31 to be eligible to carry forward losses

Can you offset F&O losses against mutual fund gains?

This is one of the most common questions investors have — and the answer is yes, with conditions.

If you’ve incurred losses from F&O trading this financial year, those losses (being non-speculative business losses) can be set off against capital gains from your equity mutual funds or stock sales in the same year. So if A in our example has an F&O loss of ₹50,000, he can further reduce his taxable capital gains by that amount, saving an additional ₹6,250 (at 12.5% LTCG rate).

However, this set-off works only within the same financial year. You cannot carry forward F&O losses to set them off against future capital gains — they can only be carried forward against future non-speculative business income.

No ‘wash-sale’ rule in India but be careful

India’s tax laws do not have a strict “wash-sale rule” like the US IRS, but investors must be careful when buying back the same security right after selling it at a loss.

In the US, the wash-sale rule states that if you buy the same investment or a “substantially identical” investment within 30 days before or after selling it at a loss, the loss will not be allowed for tax purposes.

In India, there is no direct equivalent for equities or mutual funds, but investors should avoid unnecessary selling. Only sell your mutual funds to exit the scheme for genuine reasons, not just to save on taxes or because it’s a trend.

Consult a Qualified Financial Advisor who can review your overall portfolio and help you decide whether you should actually sell your mutual funds.

Tax-loss harvesting in mutual funds: The SIP complication

SIP investors face a unique challenge: their portfolio consists of multiple purchase lots at different NAVs and on different dates. Some lots may be showing gains while others show losses — and the holding period varies across each installment.

SIP portfolios contain multiple purchase lots. Some units may be in loss even if the overall fund is positive. This means you can selectively redeem only the loss-making units while leaving the gaining units intact — a level of granularity that gives SIP investors a meaningful edge in tax planning.

For example, if you have been running a SIP in a midcap fund for three years, units purchased 14 months ago may be in profit (LTCG territory), while units purchased 8 months ago during a market high may be sitting at a loss (STCG territory). Redeeming the latter allows you to book an STCL, which can then be used to offset both your STCG and LTCG from other investments.

Gain harvesting: The other side of the coin

Tax-loss harvesting gets all the attention, but tax-gain harvesting is equally powerful for long-term equity investors — and arguably even simpler.

The strategy: every financial year, if you have long-term equity gains that are currently below the ₹1.25 lakh exemption threshold, you should book those profits and reinvest immediately. This resets your cost basis higher without any tax outgo, reducing your future tax liability when you eventually sell.

The ₹1.25 lakh yearly LTCG exemption allows you to pay reduced taxes throughout the year, which results in smaller tax payments instead of making one large tax payment at the year-end.

Done annually over a 10-15 year investment horizon, this gain harvesting can meaningfully compress your total lifetime tax burden on equity investments.

Tax-loss harvesting works under both tax regimes

A common point of confusion: does tax-loss harvesting work if you have opted for the new tax regime?

Yes. Capital gains tax is applied uniformly regardless of which income tax regime you choose. The STCG rate of 20% and LTCG rate of 12.5% apply to all taxpayers. Tax-loss harvesting is therefore equally valid — and equally valuable — whether you are in the old or new regime.

The long-term power of compounding tax savings

Here’s what most investors underestimate: the benefit of tax-loss harvesting is not just the tax saved today, but the compounding of those savings over time.

If you reinvest your tax savings, they’ll have the opportunity to compound over the life of the investment, greatly increasing the financial benefit.

To illustrate: Say A saved ₹18,000 this year through harvesting. If he reinvests that into an equity fund generating 12% annually, that ₹18,000 becomes ₹55,700 over 10 years — a compounding multiplier of over 3x on money he would otherwise have handed to the government.

When repeated in a systematic way, year in and year out, tax-loss harvesting can potentially reduce your tax bill. That means an investor is not only saving money on their taxes in a given year, but can reinvest those tax savings for potential growth in the future.

Volatility is not your enemy

One of the counterintuitive insights from global practitioners of this strategy: market volatility is not something to fear. It’s the raw material for tax-loss harvesting.

Even in years when an index delivers a positive return, not every single stock in the index has a positive return throughout the year. Volatility and dispersion of stock returns create potential opportunities to harvest losses, adding value to an investment portfolio by potentially increasing after-tax returns.

This means that even in a broadly positive market year, a diligent investor can find pockets of losses to harvest — in sectoral funds that lagged, in stocks that underperformed despite the index rising, or in SIP lots purchased at elevated NAVs.

Tax-loss harvesting: Keep these key things in mind

March 31 is non-negotiable. All transactions must be completed and settled before the financial year ends.

File your ITR by July 31. To carry forward any unadjusted capital losses to future years, your income tax return for FY 2025-26 must be filed by July 31, 2026. Missing this deadline means losing the carry-forward benefit permanently.

Bought-forward losses take statutory precedence. Under the Income-tax Act, 1961, the set-off of brought-forward losses takes statutory precedence over the standard exemption limit. You must adjust past capital losses against current year gains before applying the ₹1.25 lakh standard deduction. Many investors are unaware of this sequencing and end up misreporting their tax liability.

Switches in mutual funds are redemptions for tax purposes. When you instruct an AMC to switch units from one scheme to another — even within the same AMC — the switch-out leg is treated as a complete redemption and a fresh purchase by the Income Tax Department. This can work for you (to harvest a loss) but can also accidentally trigger a capital gain if you’re not careful.

When not to harvest

The worst approach is doing it automatically every March because it feels prudent, without checking whether you have taxable gains to offset, whether your loss type matches your gain type, or whether you are about to convert future LTCG into STCG. Done thoughtlessly, harvesting can cost more than it saves.

Specifically, avoid harvesting if:

• The exit loads on your fund make the transaction uneconomical.
• The loss you’re booking is a long-term capital loss but your only gains are short-term (since LTCL cannot offset STCG)
• You’re close to the 12-month mark on a loss-making holding — waiting a few weeks longer would convert an STCL into an LTCL, which has more restricted use
• The fund or stock you want to sell is a core, high-conviction holding where switching introduces meaningful tracking error into your portfolio

The bottom line

Tax-loss harvesting is neither magic nor complicated. It is a disciplined, informed action taken before the financial year closes. For an investor with ₹5-50 lakh in equity portfolios, the annual tax saving can range from ₹10,000 to several lakhs in the long term — real money that deserves real attention.

The strategy works best when you treat it as an annual habit rather than a panic response to a falling market. Review your portfolio in February. Map your gains and losses. Understand which types of losses can offset which types of gains. Execute before the deadline. File your ITR on time.

And if the numbers feel complicated, the most important thing you can do is consult a Qualified Financial Advisor who understands capital gains taxation. In a country where tax laws change with every Budget, professional guidance is not a luxury — it’s prerequisite.