How old do I need to be to open an account? January 21, 2021 19:40 Updated To sign up for a Finch account, you need to be at least 18 years old. Related articles Can I open an account if I work for a broker-dealer? Can I have more than one Finch account? Where is my money invested? Why am I only able to access a portion of my balance outside market hours? Is there a minimum to get started?