Securities Transaction Tax (Impact on Returns)
Securities Transaction Tax (STT) is a transaction-based levy on the purchase and sale of specified securities traded on recognised Indian stock exchanges, and while each individual rate appears modest — ranging from 0.001% to 0.1% — its compounding effect on active traders and high-turnover strategies constitutes a meaningful drag on gross returns that must be explicitly factored into performance analysis.
STT was introduced by the Finance Act 2004 with effect from October 2004, replacing the erstwhile equity stamp duty regime and bringing India in line with several developed market practices of transaction-based levies on securities trades. SEBI and the Ministry of Finance framed STT rates across multiple transaction types, which have been revised periodically.
As of the post-Budget 2024 revised schedule, STT on delivery-based equity purchases and sales was 0.1% each, applied to the transaction value. On intraday equity trades, STT applied only on the sell side at 0.025%. On F&O trades, STT on futures sale was 0.02% of the transaction value (notional), while options were taxed at 0.1% on the option premium on the sell side for regular option trades, with the rate on options exercise at 0.125% of the settlement amount.
For a buy-and-hold equity investor transacting infrequently, the direct STT impact was small. On a one-time purchase and eventual sale, STT of 0.2% (0.1% in + 0.1% out) on the total transaction value was modest relative to long-term capital gains. A ten-year hold generating a 12% CAGR would see STT as a fraction of a percent of the terminal value.
However, for high-frequency traders, market makers, and algorithmic strategies involving significant daily turnover, STT became the dominant cost component. A futures trader with Rs 1 crore notional daily turnover paid STT of Rs 2,000 per day (0.02% of Rs 1 crore) or approximately Rs 5 lakh per month at 250 trading days per year. This amount had to be recovered from trading profits before a net gain could be declared. STT was not deductible as an expense for computing business income (it was separately deductible for capital gains under Section 48).
SSTT also had an indirect interaction with the capital gains tax regime. STT payment was a prerequisite for the concessional LTCG rate (12.5%) and STCG rate (20%) on listed equity shares under Sections 112A and 111A respectively. Transactions on foreign exchanges or off-market transactions that did not attract STT were not eligible for these concessional rates.
For mutual fund investors, STT on equity fund redemptions was borne by the fund at the scheme level, effectively reducing the NAV at which units were redeemed. This made STT costs invisible in individual unit-holder statements but reduced overall fund returns fractionally.