Minimum deposits vary by bank, but most range from zero to $25,000

A high yield savings account is a regular savings account that pays a higher interest rate than a standard savings account at a traditional bank. The amount of money you need to open one depends entirely on which bank you choose — some require nothing, and others require several thousand dollars upfront.

Online banks like Marcus, Ally, and American Express Personal Savings have no minimum deposit requirement. You can open an account with $1 and start earning interest immediately. Banks that do require a minimum typically ask for $500 to $2,500 to open, though a few ask for $10,000 or $25,000. The minimum deposit is separate from the interest rate you earn — a bank with a $0 minimum might pay 4.50% APY, while one with a $25,000 minimum might pay the same rate or less.

Key Takeaways

  • Most online banks have no minimum deposit, so you can open an account with whatever amount you have available right now.
  • Banks that do require a minimum typically ask for $500 to $2,500, though some ask for $10,000 or more.
  • The minimum deposit does not determine the interest rate — you can find high rates at banks with zero minimums and lower rates at banks with high minimums.
  • Once your account is open, you can deposit additional money at any time, regardless of the initial minimum.
  • Interest rates change frequently, so compare current rates across several banks before deciding where to open your account.

Why banks set different minimums

Banks use minimum deposits as a way to filter customers. A bank that requires $25,000 is betting that customers with that much cash on hand are less likely to withdraw the money suddenly or close the account within a few months. Customers who keep larger balances are more profitable for the bank because the bank can lend out that money and earn returns on it.

Online banks, which have lower overhead costs than brick-and-mortar branches, often waive minimums entirely. They make money on the spread between what they pay you in interest and what they earn by lending your deposits out. A $1 deposit is profitable enough for them, so they remove the barrier to entry.

How the minimum affects your decision

If you have less than $500 available right now, you need a bank with no minimum deposit. Waiting to save up $2,500 before opening an account means you lose months of interest on the money you could have deposited earlier. The interest you earn on $1,000 for six months at 4.50% APY is about $22.50 — not huge, but real money you would not earn by waiting.

If you have $25,000 or more, you have access to every account on the market, including those with the highest minimums. However, this does not mean you should choose a high-minimum account. Compare the interest rates first. A bank with a $0 minimum paying 4.75% APY will earn you more money than a bank with a $25,000 minimum paying 4.25% APY, even though the second bank required more money upfront.

What happens if you fall below the minimum

Most banks do not penalize you if your balance drops below the minimum after you open the account. You keep earning interest on whatever money remains. Some banks do charge a monthly fee if your balance falls below the minimum, but this is uncommon among high yield savings accounts — it is more common at checking accounts and money market accounts.

Before you open an account, check the bank's fee schedule or call customer service and ask directly: "If my balance drops below the minimum, will I be charged a fee?" The answer should be no for any reputable high yield savings account.

Comparing rates across different minimums

The interest rate is what matters most, not the minimum deposit. A bank paying 4.75% APY with a $0 minimum will earn you significantly more money over time than a bank paying 4.25% APY with a $5,000 minimum. Over one year on a $10,000 deposit, the difference is $50 — money that stays in your pocket instead of the bank's.

Interest rates change frequently, sometimes weekly. When you are ready to open an account, visit the websites of three to five banks and compare their current rates side by side. Look for the APY (annual percentage yield), not just the interest rate — APY includes the effect of compounding and tells you the true return you will earn.

Moving money between accounts

Once your account is open, you can deposit additional money whenever you want, regardless of the minimum. You can also transfer money out to pay bills or move funds to another bank. High yield savings accounts are not locked accounts — you have full access to your money at all times, though federal law limits you to six withdrawals per month (this rule was suspended during the pandemic but remains on the books).

If you start with a small deposit at a no-minimum bank and later accumulate more savings, you can keep adding to the same account. There is no reason to move your money to a different bank just because you now have enough to meet a higher minimum.

Frequently Asked Questions

Can I open a high yield savings account with $100?

Yes, if you choose a bank with no minimum deposit. Marcus, Ally, American Express Personal Savings, and many others let you open an account with any amount. You start earning interest immediately on that $100.

Do I have to keep the minimum deposit in the account forever?

No. Once your account is open, you can withdraw money and drop below the minimum without penalty at most banks. However, some accounts do charge a monthly fee if your balance falls below the minimum, so check the fee schedule before opening.

Will I get a better interest rate if I deposit more than the minimum?

No. High yield savings accounts pay the same interest rate on all balances, whether you have $1 or $100,000 in the account. The rate does not change based on how much you deposit.

What if the bank changes its minimum after I open my account?

Banks can change their minimums, but they cannot retroactively apply a new minimum to your existing account. If a bank raises its minimum from $0 to $500 after you open, your account is grandfathered in at the old terms.

Is there a difference between a minimum deposit and a minimum balance?

Yes. A minimum deposit is what you need to open the account. A minimum balance is what you need to keep in the account to avoid fees. Some banks have both, some have one, and some have neither. Always ask about both before opening.