STT (Securities Transaction Tax) is charged by the government for transactions on the exchanges. For options, it's 0.05% on the premium.
Stamp duty is a government charge applied to contract notes, only on buy orders. For options, the rate is 0.003%.
Punch applies an 18% GST on brokerage charges (as per government norms).
Additional regulatory fees include STT, Exchange Turnover Charges, SEBI fees, IPFT, Stamp Duty and GST @18% on ETC and SEBI Fees