How old do I have to be to open an account? March 30, 2023 00:52 Updated To open a Dollarize account you must be at least 18 years old. We can't open account to people under 18. Related articles Can I cancel my account? Do I have to maintain a minimum balance? How do I open a Dollarize account? Do I have to pay taxes on my Dollarize account? Do you have credit/debit cards?