@Chiragmenghani Many full service providers like IDFC, Kotak, ICICI etc provide 3-in-1 account that combines savings account, demat account and trading account into single interface.
Here is info regarding ICICI bank : The 3-in-1 Account is a joint offering by ICICI Bank Ltd. and ICICI Securities Ltd. It integrates your Trading Account (maintained with ICICI Securities Ltd.) with bank account (maintained with ICICI Bank Ltd.) and beneficiary Demat Account maintained with ICICI Bank Ltd. in its capacity as a Depository Participant.
Applying for IPO, buying/selling of shares becomes super convenient with such a facility as hassles of adding funds, approving mandates, furnishing demat details etc. are not there. Additionally, ICICI bank also offers e-ATM where on selling securities, funds (about 75%) are instantly made available in savings bank account.
Only downside of maintaining such 3-in-1 account is higher service fee/brokerage compared to budget DP service providers (like Zerodha).
Hope it helps!