Opening an account with smallcase with your broker account is free. There is no fee for viewing smallcases
You are only charged a flat one-time fee when you buy a smallcase
For all smallcases (except Select): Rs. 100 + GST (Rs. 18)
For Select smallcases: Rs. 200 + GST (Rs. 36)
If you're investing less than ₹4,000 in a smallcase, you are charged only 2.5% of the amount invested on the buy day + GST (18% on fees)
Further orders placed on the same smallcase don't have additional fees applicable. These include investing more, rebalancing, adding/removing stocks and exiting the smallcase.
If you exit a smallcase completely, and buy it again, it is treated as a fresh purchase and the smallcase fees would be applicable again.
Created/Customized smallcases also have a fee of Rs. 100 + GST applicable.
This is over & above the brokerage, demat charges & taxes incurred while buying/selling stocks with your broker
See more here
Your fees are deducted from your ledger at the end of the day. See more here