Every year, in the last week of March, someone forwards a message telling you to sell a holding and buy it straight back before the deadline. No reason is given beyond a number and a date. People act on it without knowing what it is supposed to achieve, and a fair number of them make themselves worse off.
The idea behind those messages is real. It is worth understanding properly, because the arithmetic that made it attractive has changed and the messages have not.
A gain is not a gain until you sell
Start with the basic point, because a lot of confusion sits here. If something you own rises in value, you have a gain on paper. Nothing has happened for tax. The moment you sell, that paper gain becomes a realised gain, and only then does a tax question arise.
The gain itself is the simple part: what you received on selling, less what you paid to acquire it, less the costs of the transaction. That is the amount the tax rules then work on.
Why the calendar matters
Tax systems around the world, India included, treat gains differently depending on how long you held the asset before selling. Hold for longer than a specified period and the gain is long term. Sell sooner and it is short term. The two are taxed under different rules.
The period is not the same for every kind of asset. Listed shares, mutual fund units, property, gold and unlisted holdings have each had their own threshold at various times, and those thresholds have been redrawn more than once. So the holding period that matters is the one for the specific thing you own, on the date you sell it.
The behavioural point underneath is more durable than any threshold. If you are close to crossing from one side of a line to the other, the date you sell can change your tax outcome on an identical decision. That is worth knowing before you press the button, not after.
The idea behind the March messages
Where a system exempts an initial slice of long-term gain each year, that allowance is use-it-or-lose-it. It does not carry forward. So an investor sitting on a long-held holding might sell just enough of it to realise gain up to that slice, and immediately reinvest the proceeds in the same thing.
The intended effect is bookkeeping rather than magic. Nothing about the investment changes. What changes is the acquisition cost recorded against the units you now hold, which has been reset upward to today's price. When you eventually sell for real, the gain measured from that higher cost is smaller. The practice is usually called harvesting.
Why it is not free
Anyone forwarding you a one-line instruction has left out the costs.
- You are out of the market between the sell and the buy. Settlement takes time, and the price you buy back at is not guaranteed to be the price you sold at.
- Transacting costs money — brokerage, exchange and statutory charges on the way out and again on the way in, and in some funds an exit load.
- The clock restarts. The units you buy back are new units with a new purchase date, so the holding period begins again from zero.
- If you do not actually reinvest, you have simply sold. This is the common failure. Money that comes out for a tax reason and then sits in a bank account has abandoned the long-term plan the whole exercise was meant to protect.
The numbers have moved — check before you act
The earlier version of this post quoted a specific rate, a specific annual exemption and a specific deadline. The rules on long-term capital gains in India were rewritten in 2018 and again materially in July 2024, and articles from either era read as confident and are no longer a safe guide.
So take the mechanism from this article and nothing else: a gain arises on sale, the holding period decides which set of rules applies, and any annual allowance that exists is used or lost. For the current rates, holding periods, exemptions and indexation position that apply to your particular asset, check the income tax department's own material or speak to a qualified tax professional. Do not act on a forwarded message in the last week of March.
This article is general information for education only. It is not investment advice and does not take account of your circumstances. Investments in securities are subject to market risks; please read all related documents carefully before investing.
