For regular plans, Zerodha doesn’t directly charge you anything. AMC will charge and then in turn pass it back to us. So typically upto 1% upfront and say between 0.75 to 1% of AUM for as long as you held it. So with 50k, upfront Rs 500 and then upto Rs 500 every year for as long as you held. But since it is a % of AUM, if your investment value goes upto say 1lk in 4 years, after 4 years it will be upto 1% of Rs 1lk.
Check this link.