Most high-yield savings accounts have no minimum deposit requirement, though some banks set minimums between $1 and $25,000

The amount you need to open a high-yield savings account depends entirely on the bank. Many online banks—including Marcus, Ally, and American Express Personal Savings—let you open an account with $0 and start earning the advertised rate immediately. Others require a small deposit like $1 or $100 to activate the account. A few banks aimed at wealthier depositors set minimums as high as $10,000 or $25,000, but these are the exception, not the rule.

The minimum deposit is separate from the minimum balance you must maintain to keep earning the full interest rate. Some banks charge a monthly fee or drop your rate if your balance falls below a certain threshold—often $500 to $2,500—so you need to check both numbers before you open an account.

Key Takeaways

  • Most online banks with high-yield savings accounts require $0 to open, meaning you can fund the account after you create it.
  • A few banks require $1 to $25 to activate the account, but this is not the same as a minimum balance requirement.
  • Minimum balance requirements—the amount you must keep in the account to earn the full rate—vary from $0 to $2,500 and are set separately from opening minimums.
  • Banks that charge monthly maintenance fees often waive them if you maintain a balance above a certain level, typically $500 to $1,500.
  • The interest rate you see advertised is usually available to all account holders regardless of balance size, as long as you meet any minimum balance threshold.

How opening minimums and balance minimums work differently

An opening minimum is the amount you must deposit to create the account. An account minimum or balance minimum is the amount you must keep in the account to avoid fees or to earn the advertised interest rate. These are two separate rules, and a bank can have one, both, or neither.

For example, Ally Bank has a $0 opening minimum but no balance minimum—you can open an account with nothing and deposit $1 later, and you will still earn the full rate. By contrast, some credit unions require $25 to open but have no balance minimum. A bank might require $100 to open and $500 to maintain the advertised rate. Always check both before you commit.

Banks with no opening minimum or balance minimum

The majority of online banks that offer high-yield savings accounts have eliminated opening minimums entirely. This includes Marcus (by Goldman Sachs), Ally Bank, American Express Personal Savings, Discover Bank, and Capital One 360. You can open these accounts online in minutes and fund them from another bank account, often within one to three business days.

These banks also typically have no balance minimum to earn the advertised rate. Your interest accrues daily on whatever balance you have, whether that is $10 or $10,000. Some may charge a monthly fee if your account sits inactive or if you make too many transfers, but the fee structure is usually spelled out in the account agreement, not tied to a balance threshold.

Banks that require a deposit to open

Some regional banks and credit unions still require a small opening deposit, usually between $1 and $100. This deposit counts toward your account balance immediately—you are not paying a fee, you are simply funding the account. Once the account is open, you can withdraw that money if you want, though some banks require you to maintain a minimum balance to keep the account active.

Online banks that cater to savers with larger balances may require $1,000 to $25,000 to open. These accounts often come with additional features like dedicated customer service or higher interest rates, but they are not necessary to earn a competitive rate on high-yield savings. If you have less than the minimum, a no-minimum bank is a better fit.

What happens if your balance drops below the minimum

If a bank has a balance minimum and your account falls below it, one of three things typically happens: the bank charges a monthly fee (usually $5 to $10), the interest rate drops to a lower tier, or the account is closed. The exact consequence is spelled out in the account agreement, which you can request before you open the account.

Some banks give you a grace period—30 days, for example—to bring your balance back up before they charge a fee or close the account. Others enforce the rule immediately. If you are unsure whether you can maintain a balance above the minimum, choose a bank with no balance minimum instead. The difference in interest rate is usually negligible, and you avoid the risk of a fee.

How to find the right account for your savings amount

Start by deciding how much you plan to deposit initially and how much you expect to keep in the account long-term. If you are starting with less than $500, look for banks with $0 opening minimums and no balance minimums—Marcus, Ally, and Discover all fit this profile. If you plan to keep $1,000 or more, you have more options, including banks that do require a minimum because you will easily stay above it.

Once you have narrowed down banks by their minimum requirements, compare their current interest rates. The rate changes frequently, so check the bank's website directly rather than relying on older information. A difference of 0.25% to 0.50% in APY can add up over time, especially if you are saving a larger amount. Use an online calculator to see how much that difference means for your specific balance.

Frequently Asked Questions

Can I open a high-yield savings account with $0?

Yes. Many banks including Marcus, Ally, American Express, and Discover allow you to open an account with no deposit and fund it later. You will earn the advertised rate on whatever balance you have, starting from $1.

Do I have to keep a minimum balance to earn the advertised interest rate?

Not always. Most online banks have no balance minimum for the advertised rate. Some regional banks or credit unions may require $500 to $2,500 to earn the full rate, but this is less common. Check the account agreement before you open.

What is the difference between an opening minimum and a balance minimum?

An opening minimum is what you must deposit to create the account. A balance minimum is what you must keep in the account to avoid fees or earn the advertised rate. A bank can have one, both, or neither.

If my balance drops below the minimum, what happens?

The bank may charge a monthly fee, lower your interest rate, or close the account. The exact consequence depends on the bank's policy. Check the account agreement or call customer service to find out what applies to your account.

Does a higher opening minimum mean a higher interest rate?

Not necessarily. Banks with high opening minimums (like $25,000) often target wealthier customers, but their rates are usually the same as banks with no minimum. The opening minimum is about the bank's business model, not the quality of the account.