STT hike on F&O from April 2026: pain points for Indian traders

Escalating costs crush retail margins

Retail investors, who account for 90% of the F&O volume, will feel the sting most acutely. The previous STT on a trade of ₹1 lakh worth of futures stood at ₹20, while that number now stands at ₹50. A trade of ₹50,000 in option premium will incur ₹75 compared to ₹50 before, increasing the cost of trading by 20-40% when including other charges such as the brokerage.

Data provided by the NSE indicates that problems are on the horizon as unique F&O accounts declined from 1.06 crores in FY25 to 75 lakhs as of December 2025. After the increase in STT, the trade volume is expected to see a decrease of 20-30%.

Volatility amplifies the squeeze

Political risks, including the US-Iran feud, will cause an increase in the India Volatility Index (India VIX), thus widening bid-ask spreads while drawing speculative investments despite higher STT being a deterrent to participation. Day traders using the straddle strategy for options on the expiry date will suffer losses as the volatility will nullify their anticipated profit, while experienced traders move to position trading using futures and cash stocks.

The SEBI move, in conjunction with other steps like increasing lot sizes and having to pay the entire premium on the first day, complements this approach as it shields new investors from suffering the total loss of ₹1.80 lakh crores on derivatives. Large volumes by foreign institutions and algorithms make it easier for them to absorb losses.

Government gains, market maturity

It is expected to generate an additional revenue of ₹25,000 crores annually, which would ensure that money flows into infrastructure development without raising taxes on income. However, critics believe that it will affect capital formation in the renewable energy and defence sectors, whereas supporters view it as a move from betting to investing.

Moving forward, one can expect better strategies in the sense that there will be fewer trades and stronger trades. There could be an increase in bid-ask spreads by 5-10 basis points; however, lesser leverage would mean stability. Vinit Bolinjkar, Head of Research at Ventura, said, “Hybrid funds are the only category to have increased net collection in FY 25-26, where multi asset has been a stellar performer with investors being more conservative and taking exposure even to gold. Arbitrage funds are now taking the brunt due to expectations of lower returns due to an increase in STT charges.”

Conclusion

The STT increase in April 2026 transforms F&O into a serious playground instead of the retail casino it once was. The traders will have to adapt to the new reality by adopting selectivity in their positions and managing volatility or risk of becoming obsolete. With the volumes on NSE expected to settle at 15-20% lower levels, sustainability is the key.