On expiry day, many Nifty options traders expect a clean profit, but the final contract note often tells a different story. A part of that difference comes from Securities Transaction Tax, or STT, which is charged on F&O trades in India. In 2026, the recent rate changes have made this cost more important to track, especially for active traders.

In this blog, you’ll see what STT is on F&O trades in 2026, including Budget changes, cost increases for Nifty traders, and their effect on overall returns.

What is STT on F&O Trades?

STT, or Securities Transaction Tax, is a tax charged by the government on securities transactions in India. It applies to trades on exchanges such as NSE and BSE, including futures and options.

For F&O trades, STT is calculated on the trade value rather than on profit. Futures are taxed on the contract value, while options are taxed on the premium or strike value, depending on the transaction. The tax is deducted during settlement and appears separately in the contract note.

In simple terms, STT is one of the costs that affects the final profit or loss from a trade.

STT Changes in Budget 2026

The February 2026 Budget changed STT on F&O trades, and the revised rates came into effect from April 1, 2026. The update increased the tax burden on active derivatives trading, especially for futures and options sellers.

In simple terms:

Futures now attract STT on the sell side.
Options attract higher STT on the sell side and on exercise.

Trade Type	Pre-April 2026 (Round Trip ₹10L)	Post-April 2026	Increase
Nifty Futures	₹400	₹500	25%
Nifty Options Sell	₹1,000 (premium only)	₹1,500	50%
Options Exercise	₹0 (rarely hit)	₹1,500 (strike)	New

These changes increased trading costs and reduced net returns for many F&O traders. As a result, traders now need to include STT more carefully while planning entries, exits, and expiry-day trades.

How STT on F&O Trades Works?

Brokers calculate STT when a trade is settled. The amount depends on the type of trade and the value involved.

For futures, STT is based on the contract value.
For options, STT is based on the premium amount or, in some cases, the strike value.
The applicable tax rate is then used to calculate the final amount.
The STT amount appears separately in the contract note or ledger.

GST is charged only on brokerage, not on STT.

Example of STT on F&O Trades

Consider Nifty futures at ₹24,000 with a lot size of 25. Purchase one lot (no STT on buy).

Buy value: ₹6,00,000 (STT ₹0).
Sell at ₹24,200: Value ₹6,05,000 × 0.05% = ₹302.50 STT.
Gross profit ₹5,000 minus STT ₹302.50 minus Alice Blue brokerage ₹20 = net ₹4,677.50.

Before the hike, the total STT was ₹241. The new rate adds ₹61 per trade; multiple trades monthly increase costs further.

For options, sell a call at ₹100 premium.

Sell STT: ₹2,500 × 0.15% = ₹3.75.
If exercised (in-the-money): Additional STT on ₹6,00,000 strike × 0.15% = ₹900.
Total STT ₹903.75 against ₹2,500 premium.

Such costs accumulate during expiry periods.

Key Features of STT in 2026

STT on F&O trades includes these key points:

Applies mainly to sell trades: Futures purchases have no STT. Only when you sell futures or options does the tax apply.
Covers option exercises: When in-the-money options get exercised, STT applies to the strike value, not just the premium.
Paid regardless of profit/loss: You pay STT even if your trade loses money. There are no refunds.
Counts as a business expense: STT paid can be claimed in your income tax return as a business expense. Losses can be carried forward for 8 years.
Same rates for all brokers: Every SEBI-registered broker charges identical STT rates. Differences come from brokerage charges only.
Lower rates for commodities: MCX commodity futures have lower STT compared to NSE equity F&O.

Advantages of Understanding STT

Knowing STT helps traders in these practical ways:

Better cost planning: Traders can calculate the exact price movement needed to cover STT and brokerage fees. This makes profit targets clearer before entering any trade.
Strategy adjustments: Understanding STT encourages shifts to lower-cost approaches, such as buying options instead of selling them, since buyer-side STT is lower.
Position sizing decisions: Larger trades spread STT costs across bigger positions, making the tax less significant relative to overall returns.

Risks and Limitations of STT

Higher breakeven requirements: The tax increases the minimum price movement needed for profit, especially for short-term and intraday strategies.
Impact on small accounts: Traders with smaller capital face higher relative costs from STT. Multiple trades add up quickly, reducing available margin.
Additional costs for options sellers: When options get exercised, sellers pay STT on the full strike value, which can be substantial.
No relief on losses: STT applies even when trades lose money. This design encourages longer-term investing over frequent speculation.

STT on F&O vs. Other Segments (₹1 Lakh Trade)

Segment	Buy STT Rate	Sell STT Rate	Total STT (Round Trip)	Best For
F&O Futures	0.02%	0.02%	₹40	Hedging, leverage
F&O Options (Sell)	0%	0.1%	₹100	Income strategies
Equity Delivery	0.1%	0.1%	₹200	Long-term holding
Intraday Equity	0.025%	0.025%	₹50	Short-term trades

What this means for traders:

Futures: Only pay STT when selling. No tax when buying.
Options: Heavy STT when selling options. Buyers pay less.
Delivery: Pay STT both when buying and selling shares.
Intraday: Lower STT than delivery, but applies to both sides.
Commodities: Cheapest STT overall.

Bottom line: F&O trading generally costs less STT than buying/selling regular shares. This makes derivatives attractive for active traders, though options sellers face the highest charges.

Common Mistakes with STT

Traders often miss these STT issues:

Forgetting option exercise charges: You sell an option expecting it to expire worthless, but if it becomes profitable for the buyer, they exercise it. You then pay STT on the full strike value, which can be much higher than the premium.
Using old calculators: Many continue using apps or tools with pre-April 2026 rates. This gives wrong breakeven calculations and profit estimates.
Confusing STT with GST: STT applies to your total trade value. GST (18%) applies only to brokerage fees. Mixing these creates confusion in cost analysis.
Not tracking high volumes: Multiple small trades add up. Without monitoring total STT paid, profits get eaten away gradually.

Who Should Use F&O Considering STT

Best suited for F&O:

Swing traders holding positions for days/weeks
Hedgers protecting stock positions
Traders with ₹2 lakh or more capital
Those doing fewer, well-planned trades

Better alternatives:

Scalpers (too many trades, high STT)
Small accounts under ₹1 lakh (STT eats too much capital)
Beginners (start with paper trading first)

Key advice: Match your trading style to STT costs. Fewer quality trades usually beat high-volume activity after taxes.

Conclusion

STT is a mandatory cost that impacts every F&O trade’s final outcome. The 2026 Budget changes have made these charges more significant, requiring traders to account for them in position sizing, breakeven calculations, and overall strategy planning.

Understanding STT helps you avoid surprises in your contract notes and make better decisions about trade frequency, options selling versus buying, and capital allocation across segments.

Frequently Asked Questions

1) What STT applies to F&O trades after April 2026?

Edit Content

2) Did Budget 2026 increase F&O STT rates and why?

Edit Content

3) How to calculate STT on exercised Nifty options?

Edit Content

4) Can F&O traders claim STT as a tax deduction?

Edit Content

5) What STT applies if OTM options expire worthless?

Edit Content