SEBI has mandated all stock brokers to reverse the unutilized funds lying in the clients' trading accounts at least once in a quarter or 30 days. These funds will be transferred back to your primary bank account linked with your Kotak Securities trading account. The process of transferring back the unutilized funds is called a Running account settlement or Quarterly settlement.
Say you have Rs.50000 in your trading account on 1st November. and you do not trade for the entire month. In that case the money will be transferred back to your primary bank account by 2nd December. This is irrespective of you adding more funds to the trading account within the 30 day period.
If you have transferred Rs.50000 to your trading account on 06th October, and have used only Rs 25000 for trading up till 07th October (i.e. 1st Friday of October), the balance Rs 25000 will be transferred back to your primary bank account by 08th October.
You can view the SEBI Circular here.