STT Charges – What Is Securities Transaction Tax (STT)?

STT full form is Securities Transaction Tax. It is a tax charged when certain securities are bought or sold on recognised stock exchanges in India. In simple terms, whenever an investor trades shares, derivatives, or some equity-oriented funds on the stock market, a small tax is applied to that transaction.  

This tax is collected automatically through the exchange and broker. So, investors do not need to calculate or pay it separately. In practice, it appears along with brokerage, exchange fees, and other statutory charges on the trade contract note. 

This article explains what is STT charges, how it works, where it applies, and how recent changes affect traders. 

What is STT Charges? 

SST charges were imposed with the primary objective of making the tax collection process efficient and avoiding any tax evasion. The tax is automatically deducted on trader’s behalf by the broker when they purchase or sell a security through a stock exchange.  

STT is deducted regardless of the profitable or not, unlike capital gain tax. 

STT levied on Equity 

STT levied on Mutual Funds 

STT levied on Options Contracts 

STT levied on other securities 

SST levied on securities 

How Budget 2026 STT Changes Will Affect Traders?   

The revised STT rates introduced in Budget 2026 increase trading costs for futures traders. Since STT is charged on the transaction value, even a small rise in the rate can raise the overall cost of trading. 

For example, consider a futures contract with a value of ₹20,00,000. 

As shown above, the STT increases from ₹400 to ₹1,000, meaning an additional ₹600 per trade. This amount excludes other charges such as brokerage, GST, and exchange fees. 

For active traders, the impact becomes more noticeable. For instance, if a trader executes 20 such futures contracts, the total STT alone would be ₹20,000, which can significantly affect overall trading costs and margins. 

STT Calculation Example 

Here’s how STT works in real trading scenarios. 

Equity Delivery Example 

Suppose an investor buys 100 shares at ₹200 each. 

Total trade value = ₹20,000 

• STT on buy = ₹20,000 × 0.1% = ₹20 
• If the shares are later sold at ₹220 
• Sale value = ₹22,000 
• STT on sell = ₹22,000 × 0.1% = ₹22 

Total STT paid = ₹42 

In practice, this amount is automatically included in the transaction statement. 

Futures Trading Example 

A trader sells a futures contract worth ₹1,00,000. 

• STT rate = 0.05% 
• STT payable = ₹1,00,000 × 0.05% = ₹50 

Earlier the amount would have been lower, which shows how Budget 2026 introduced a clear increase in derivatives trading costs. 

Options Trading Example 

Suppose a trader sells options with a premium value of ₹50,000. 

• STT rate = 0.15% 
• STT payable = ₹50,000 × 0.15% = ₹75 

If the option is exercised, the tax is also applied on the exercise value. 

Impact of STT on Investors and Traders 

Here’s how STT impacts investors and traders: 

• Adds to Trading Costs: STT is a standard statutory charge in stock market trades. 
• More Noticeable for Active Traders: Frequent traders may see higher cumulative costs on STT charges on intraday. 
• Minimal Effect on Long-term Investing: Delivery investors usually experience limited impact. 
• Encourages Balanced Trading Behaviour: Changes in STT rates can discourage excessive speculation. 
• Simplifies Tax Collection: The automatic deduction system improves transparency. 
• Works Across the Industry: Every recognised exchange follows the same framework. 

Securities Transaction Tax and Income Tax 

STT also influences how profits from securities are taxed under the Income Tax Act. 

Important points include: 

• Capital gains taxation: Equity trades where STT is paid qualify for capital gains tax treatment. 
• Short-term capital gains (STCG): Gains from shares held for less than one year are taxed at a special rate. 
• Long-term capital gains (LTCG): Gains from shares held for more than one year receive favourable tax treatment. 
• Business income classification: Active traders may classify their trading income as business income. 
• Expense deduction: In many cases, traders treating trading as business, may claim STT as a deductible expense. 

Basically, STT helps define how stock market profits are taxed under the Indian tax system. 

Conclusion 

Securities Transaction Tax is a key component of stock market trading in India. It is charged automatically whenever certain securities are bought or sold on recognised exchanges. Over the past few years, changes in derivatives trading activity have led to updates in STT rates, particularly through Budget 2026. Understanding how STT works across equities, futures, options, and funds helps investors estimate trading costs more accurately. In practice, when using an online trading app, these charges appear automatically in the trade breakdown.