Securities Transaction Tax

Securities Transaction Tax (STT) is a tax levied by the Government of India on the purchase and sale of listed equity securities, derivatives and equity‑linked instruments. It was introduced in 2004 to curb tax evasion on short‑term trades and to create a transparent revenue stream from market activity.

STT is collected by the stock exchanges at the point of transaction and is credited to the Central Government. Because it is deducted on the gross transaction value, it does not depend on the investor’s income tax slab, making it a direct tax on market activity rather than on earnings.

For the NISM exam, STT is important because the certification tests your ability to pick the correct rate for a given trade, compute the tax amount, and understand its effect on net returns. Many exam questions present a trade scenario and ask for the STT payable or the adjusted cost basis.

• STT applies only to trades executed on recognized Indian stock exchanges.
• It is separate from capital gains tax, securities transaction charge, and GST.

The SEBI‑mandated STT rates differ based on the security class and whether the trade is a delivery or intraday transaction. The rates are expressed as a percentage of the gross transaction value and are applied on both the buy and sell side unless specifically exempted.

Equity delivery trades attract the highest rate because they involve transfer of ownership. Intraday equity trades, which are closed within the same trading day, are taxed at a lower rate to encourage liquidity. Futures and options, being derivative contracts, have distinct rates that apply only on the sell side for most contracts.

Knowing the exact rate for each category is vital for accurate calculation and for answering multiple‑choice questions that present mixed‑type trades. The rates are static until a new circular is issued, so the exam expects you to remember the current percentages.

STT is calculated by multiplying the gross transaction value by the applicable STT rate. The transaction value is the number of shares (or contracts) multiplied by the execution price. Because the rate is a percentage, you divide it by 100 before multiplication.

For delivery and intraday equity trades, the tax is levied on both the purchase and the sale, so you calculate STT twice – once at buy and once at sell. For futures and options, STT is only charged on the sell side, simplifying the computation.

Exam questions often give you the trade size, price, and the type of transaction. Apply the rate directly; there is no need for rounding beyond two decimal places for rupee values, as the exchanges round off to the nearest paise.

Equity Delivery trades involve actual transfer of shares from seller to buyer. The STT rate of 0.10% applies on both sides, making the effective tax on a round‑trip trade 0.20% of the total turnover.

Equity Intraday trades are closed within the same trading day. The lower rate of 0.025% on both buy and sell reflects the regulator’s intent to promote market liquidity. The combined STT for a complete intraday round‑trip is therefore 0.05%.

Futures and Options are taxed only on the sell side. Futures sellers pay 0.01% while options sellers pay 0.05%. Buyers of these contracts incur no STT, which is a frequent point of confusion in exam scenarios.

Because STT is deducted before any profit is realized, it reduces the effective return on a trade. For a high‑frequency intraday trader, the 0.025% charge on each side can erode thin margins, making it crucial to factor STT into the breakeven analysis.

For long‑term investors holding equities in delivery, the 0.10% charge is a one‑time cost at purchase and another at sale. Over a multi‑year horizon, the impact on annualised returns is relatively small, but the exam may test you on the cumulative effect of multiple trades.

When comparing mutual fund distributors’ recommendations, remembering that STT is a transaction‑level cost helps you advise clients on cost‑efficient trading strategies, such as using SIPs (which incur STT only on the purchase side of equity delivery) versus lump‑sum purchases.