Zerodha Smallcase cost Rs 100 per transaction (Capped at 1.5% of the investment amount). It means a lower of 1.5% of investment value or Rs 100 will be charged. Thus, you'll pay a maximum of Rs 100+ GST on investment in any Smallcase product.
For example, if you've invested Rs 1 lakh in any smallcase, you will be charged with Rs 100 brokerage fee (Lower of Rs 100 or 1.5% of 1 lakh, which is Rs 1500).