A primary bank account is the main bank account linked to your Dhan account, which we register with exchanges (NSE/BSE/MCX) and depositories (CDSL). The Depositories in turn register this with company RTAs, for corporate actions like Dividends.  The Dividends, Referral & SEBI pay-outs (monthly/quarterly), if any, are credited to the primary bank account. Rest assured, all verified bank accounts linked (primary and others) to your Dhan account can be used to add and withdraw money