BO ID or Beneficial Owner Identification Number is a unique 16-digit number assigned to individuals who hold a Demat account with CDSL (Central Depository Services Limited). It acts like an account number for your Demat account and is essential for identifying and managing your securities in electronic form. This BO ID is used in various transactions, including buying, selling and pledging shares. Explanation of DP name, DP ID , BO ID , and demat ID and how to view them. It's importance for IPOs and CDSL TPIN authorisation. BO ID stands for Beneficial Owner Identification Number. When you execute a trade online, the BO ID acts as an identifier for your username or demat account. What is BO ID in Demat account? Understand how this 16-digit number identifies your investments and helps you trade securely in India.