Who can sign up for an account? October 12, 2020 20:04 The minimum age for opening a brokerage account is 18 years old and you must be a U.S. resident with a U.S. bank account. Related articles Are there any trading commissions or hidden fees? How much money do I need to start? How long does it take to set up my account? How do I add funds to my account? How do you build my portfolio?