How the Brokerage Calculator works
Every trade in India carries statutory charges in addition to brokerage: Securities Transaction Tax (STT), exchange transaction charges, SEBI turnover fee, stamp duty and 18% GST on brokerage and exchange fees.
For intraday and futures, many discount brokers charge the lower of a flat fee or 0.03% per order; the calculator applies that rule. Options brokerage is usually a flat fee per order. Rates change from time to time, so treat the result as an estimate.