You must be 18 to open a high yield savings account in your own name
Banks and online financial institutions require you to be at least 18 years old to sign a contract and open an account by yourself. This is a legal requirement, not a bank policy — you cannot get around it by going to a different bank or using a different type of account.
If you are under 18, you have two real options: open a custodial account with a parent or guardian, or wait until you turn 18. A custodial account is a savings account held in your name but controlled by an adult until you reach the age of majority (usually 18, sometimes 21 depending on your state and the bank).
Key Takeaways
- You must be 18 years old to open and control a high yield savings account yourself; this is a legal requirement across all banks.
- If you are under 18, a parent or guardian can open a custodial account in your name, and you can deposit and withdraw money with their permission.
- Some banks offer teen savings accounts with lower rates than high yield accounts, designed for minors to learn money management.
- When you turn 18, you can convert a custodial account to a regular account or open your own high yield savings account at any bank.
- High yield savings accounts at online banks typically have no minimum balance requirement, making them accessible as soon as you are legally able to open one.
How custodial accounts work for minors
A custodial account is opened by a parent or legal guardian and held in the minor's name. The adult has full control over deposits, withdrawals, and account decisions until the minor reaches the age of majority. The money in the account belongs to the minor, not the parent, and the parent cannot use it for their own purposes.
Some high yield savings accounts allow custodial versions. Ally Bank, Marcus by Goldman Sachs, and American Express Personal Savings all offer custodial high yield savings accounts. The rates are the same as the regular account — your money earns the same APY whether you are 8 or 18. The only difference is who can sign off on transactions.
To open a custodial account, the parent or guardian brings identification and the minor's Social Security number to the bank or completes the process online. The process is the same as opening a regular account, except the process asks for the minor's date of birth and the adult's relationship to the minor.
What happens when you turn 18
When you reach 18, the custodial account does not automatically convert to a regular account. You will need to contact the bank and request the conversion. Some banks do this by phone or through their app; others require you to visit a branch or sign new paperwork.
Once the account converts, you have full control. The parent or guardian no longer needs to approve transactions, and you can withdraw money, change account settings, or close the account without their permission. The money stays in the account and continues to earn interest at the same rate.
If you want to switch to a different high yield savings account at 18, you can open a new account and transfer the balance. There is no penalty for moving money between savings accounts at different banks.
Teen savings accounts versus high yield accounts
Many banks offer teen savings accounts designed specifically for minors. These accounts typically pay much lower interest rates than high yield savings accounts — often 0.01% APY or less. They are marketed as educational tools to teach young people about saving and money management, not as accounts designed to maximize earnings.
If your goal is to earn interest on money you are saving, a custodial high yield savings account will earn significantly more. The difference compounds over time. On $1,000, a high yield account earning 4% to 5% APY will generate $40 to $50 per year, while a teen account earning 0.01% will generate less than 10 cents.
The trade-off is that some teen accounts come with debit cards, spending controls, and parental monitoring features that high yield accounts do not. If the goal is learning to manage money rather than maximizing interest, a teen account may be the right choice despite the lower rate.
Documentation and identification needed
To open any savings account — custodial or regular — the bank needs proof of identity and a Social Security number. For a minor, the parent or guardian provides their own ID and the minor's Social Security number. Some banks accept an process online; others require an in-person visit.
Online banks typically allow you to open a custodial account entirely through their website or app. You will need to upload a photo of the adult's ID and provide the minor's Social Security number. The process usually takes a few minutes, and the account opens within one to three business days.
At 18, when you convert the account or open a new one, you will need to provide your own ID and Social Security number. A driver's license, state ID, or passport all work. If you do not have a photo ID yet, some banks will accept other documents like a school ID plus a utility bill.
No minimum balance requirements at most online banks
Most online banks that offer high yield savings accounts have no minimum balance requirement. You can open an account with $1 and start earning interest when ready. This makes high yield accounts accessible to anyone who wants to save, regardless of how much money they have to start with.
Some brick-and-mortar banks do have minimum balance requirements — often $500 to $2,500 — to open a savings account or to earn the advertised interest rate. If the balance drops below the minimum, the bank may charge a monthly fee or pay a lower rate. Online banks avoid these requirements because their lower operating costs allow them to offer better rates without minimums.
When comparing high yield accounts for a custodial setup, check whether the bank charges any monthly maintenance fees or requires a minimum deposit. Most do not, but it is worth confirming before you open.
State-specific rules and age of majority
In most states, the age of majority is 18. In a few states — Alabama, Nebraska, and Wyoming — it is 19. In Mississippi, it is 21. This affects when a custodial account automatically converts to a regular account and when you have full legal control over the money.
If you live in one of these states, the bank will hold the custodial account until you reach your state's age of majority. You can still request early conversion at 18 in most cases, but the bank is not required to grant it. Contact the bank directly to ask about early conversion options if you turn 18 before your state's age of majority.
The interest rate and account features do not change based on your state. A high yield savings account in Mississippi earns the same APY as one in California. Only the legal age at which you gain full control varies.
Frequently Asked Questions
Can a minor open a high yield savings account without a parent?
No. You must be 18 to sign a contract and open an account in your own name. If you are under 18, a parent or legal guardian must open a custodial account for you. There is no way around this requirement.
Do custodial high yield accounts earn the same interest as regular accounts?
Yes. The interest rate is identical. The only difference is who controls the account. A custodial account at Ally Bank earning 4.20% APY earns the same rate as a regular Ally account — the minor's age does not affect the rate.
What happens to the money in a custodial account when I turn 18?
The money stays in the account and continues to earn interest. You contact the bank and request to convert the custodial account to a regular account, which gives you full control. The balance does not change, and you can withdraw or transfer the money whenever you want.
Can I have both a teen savings account and a high yield savings account?
Yes. A parent can open both accounts for a minor. Some families use a teen account with a debit card for spending and a high yield account for longer-term savings. There is no limit to how many savings accounts you can have at different banks.
Do I need to be a U.S. citizen to open a high yield savings account at 18?
You need a Social Security number or Individual Taxpayer Identification Number (ITIN). Most banks require a Social Security number. If you have an ITIN, contact the bank directly to ask whether they accept it — policies vary by institution.