F&O Trading Gets Costlier: Impact of the STT Hike#
The Crackdown on Retail Speculation#
Over the last five years, India has witnessed an unprecedented explosion in retail participation in the Futures and Options (F&O) segment. Despite SEBI warnings that 9 out of 10 retail traders lose money in derivatives, the trading volumes have only surged.
To actively discourage rampant speculation and curb retail losses, the government has used the Income Tax Act, 2025 as a deterrent by massively hiking the Securities Transaction Tax (STT).
The New STT Rates#
Starting April 1, 2026, the STT levied on the sale of derivatives will see a sharp increase:
1. Sale of Options#
Previously, STT on the sale of an option in securities was levied at 0.0625% of the option premium. Under the new rules, this rate has been hiked to 0.1% of the option premium.
Impact: If you sell Nifty call options with a premium value of ₹10,00,000, your STT outgo jumps from ₹625 to ₹1,000 per trade. For high-frequency algorithmic traders and scalpers who rely on razor-thin margins, this 60% increase in transaction cost will destroy their net profitability.
2. Sale of Futures#
The STT on the sale of futures in securities has been hiked from 0.0125% to 0.02% of the total traded value.
Impact: Because futures are leveraged and the STT is calculated on the total contract value (not just the margin), this seemingly small percentage increase results in a massive absolute cost. Selling a futures contract worth ₹1 Crore will now attract an STT of ₹2,000 instead of ₹1,250.
The Ripple Effect on Market Dynamics#
- Shift to Cash Markets: The government’s explicit goal is to push retail investors away from leveraged derivatives and back into cash-market delivery trading (where STT remains unchanged) or mutual funds.
- Wider Bid-Ask Spreads: Market makers and institutional arbitrageurs, who provide liquidity to the system, will face higher operational costs. To compensate, they will likely widen the bid-ask spreads, increasing the impact cost for all traders.
- Income Tax Classification: Remember, under the new ITA 2025, F&O trading remains classified as Non-Speculative Business Income. Therefore, the STT paid can still be claimed as a legitimate business expense when calculating your net taxable business profit under ITR-3.
If you are a heavy derivative trader, it is time to back-test your trading strategies and algorithms incorporating these new STT costs. Many break-even strategies will become loss-making overnight on April 1, 2026.