When you open your account on Dhan, you need to mandatorily link a bank account to it. This becomes your "Primary" Bank account on Dhan. After your account is successfully created, you can proceed to add upto four other additional banks on Dhan. We've made a simple infographic to help you understand the difference between the two:

Currently, deletion or removal of a bank is not supported on Dhan. By the end of 2024, we will launch the facility to remove your other bank accounts on Dhan.

Note: Removal of Primary bank account will never be allowed on Dhan. In order to remove this, you first need to add another bank account and use our "Change Primary Bank" (explained here).