Most high yield savings accounts have no minimum deposit requirement
You can open a high yield savings account with $0 at many banks. Institutions like Marcus by Goldman Sachs, Ally Bank, and American Express Personal Savings have no stated minimum to create an account. You fund it after opening, on your own schedule.
Some banks do set minimums—typically $100 to $500—but these are less common among online banks that offer high yields. Credit unions and smaller regional banks are more likely to require an opening deposit. Check the specific bank's website before you start the account process to see what they require on day one.
The real constraint is not opening the account; it is earning the stated APY. Most banks only pay their advertised rate on the full balance you hold. If you open with $1 and deposit $10,000 later, you earn the high rate on all of it from the moment the money clears—but some banks calculate interest daily while others use a different method, so timing matters slightly.
Key Takeaways
- Most online banks offering high yields require $0 to open, so you can create the account before you have money to deposit.
- A few banks require $100 to $500 at opening, so confirm the minimum before you start the application.
- The APY applies to whatever balance you hold once the account is open, whether that is $1 or $100,000.
- Interest accrual method (daily vs. monthly) varies by bank and affects how much you earn on deposits made mid-period.
Why banks advertise no minimum but still have rules
Banks that advertise "no minimum" are competing for customers who want to start small or test the account before moving larger sums. Removing the opening deposit barrier is a marketing advantage. However, some banks impose other conditions: a minimum balance to avoid monthly fees, or a minimum to keep the account open if it sits unused.
Read the fee schedule, not just the headline. A bank might have $0 minimum to open but charge $5 per month if your balance drops below $500. Over a year, that erases the benefit of a high yield rate on small balances. Other banks waive all fees regardless of balance, which is the better deal if you plan to start small.
What happens when you deposit money after opening
Once your account is open, you transfer money in using ACH from another bank account, wire transfer, or check deposit (if the bank accepts them). ACH transfers typically take one to three business days to clear. During that time, the money is in transit and not yet earning interest.
After the transfer clears, the full amount earns the advertised APY immediately—you do not have to wait for a statement cycle or a minimum holding period. If you deposit $5,000 on a Tuesday and it clears Wednesday, you start earning interest on Wednesday. The bank calculates how much you owe based on the daily balance and the APY, then deposits interest into your account monthly or daily depending on their method.
Banks that require a deposit to open
Some institutions still ask for money upfront. Vanguard High Yield Savings Account requires $50,000 minimum, but that is an outlier aimed at investors with large sums. Most traditional banks that offer high yields ask for $100 to $500. Credit unions often require $25 to $100 to establish membership before you can open a savings account.
If you have less than the minimum, you have two options: wait until you have enough to meet it, or choose a different bank with no minimum. The difference in APY between banks is usually small (often 0.1% to 0.3%), so switching to a no-minimum bank to start sooner is often the smarter move. You can always move money later if a higher-rate bank becomes available.
How to compare banks when minimums differ
When you are choosing between banks, look at three things: the opening minimum, the APY, and the fee structure. A bank with a $500 minimum and 4.50% APY is not necessarily better than one with $0 minimum and 4.40% APY—it depends on how much you plan to deposit and how long you plan to hold it.
Use this rough math: if you have $1,000 to deposit, the difference between 4.40% and 4.50% is $1 per year. That is not worth waiting three months to save $500 for a higher-minimum bank. But if you have $50,000, that $50 annual difference matters more, and you might choose the higher-rate bank even if it has a minimum.
Also check whether the bank waives the minimum if you set up automatic deposits. Some banks drop the opening minimum if you commit to $100 or $200 monthly transfers. That can be a path to opening with less money if you have steady income.
Moving money between accounts if you change banks
If you open a high yield account with one bank and later find a better rate elsewhere, you can move the money without penalty. High yield savings accounts have no withdrawal limits (federal rules changed in 2020), and transfers between banks are free when you use ACH.
The process takes three to five business days. You provide the new bank with your old account number and routing number, and they pull the money for you—or you can initiate the push from your old bank. Interest accrues up to the day the money leaves your old account, so you do not lose earnings by switching.
Frequently Asked Questions
Can I open a high yield savings account with $1?
Yes, at most online banks. You create the account with $0 or $1, then deposit more money later. The full balance earns the advertised APY once the deposit clears, which usually takes one to three business days.
Do I have to keep a minimum balance to earn the full APY?
No. The APY applies to whatever balance you hold. Some banks charge a monthly fee if your balance falls below a threshold, but the interest rate itself does not change. Check the fee schedule to see if there is a balance requirement to avoid fees.
What if the bank requires a minimum and I do not have it yet?
Choose a different bank with no minimum, or wait until you have the required amount. The APY difference between banks is usually small enough that opening sooner with a no-minimum bank is worth more than waiting for a slightly higher rate.
Does the APY change after I open the account?
Yes. Banks change their APY based on Federal Reserve rates and competition. Your rate may go up or down after you open. You will earn whatever rate the bank is currently offering on your balance, not the rate that was advertised when you opened.
Can I move my money to a different bank if I find a better rate?
Yes, with no penalty. Use ACH transfer to move the full balance to another bank. The process takes three to five business days, and you earn interest up to the day the money leaves your old account.