Banks, Credit Unions, and Online Brokers All Offer Money Market Accounts

You can open a money market account at a traditional bank, a credit union, or an online bank. Each type of institution offers different interest rates, minimum balances, and fee structures. The account itself works the same way regardless of where you open it — you deposit money, earn interest, and can write checks or make transfers — but the terms and the rates you receive will vary significantly.

Your choice comes down to what matters most to you: the highest interest rate, the lowest minimum deposit, the ability to visit a physical branch, or a combination of these factors. There is no single "best" place to open one; the right choice depends on your situation and what you value in a financial institution.

Key Takeaways

  • Traditional banks offer money market accounts with branch access and FDIC insurance, but typically pay lower interest rates than online banks.
  • Online banks and online-only brokers usually offer the highest interest rates because they have lower overhead costs.
  • Credit unions may offer competitive rates and lower fees if you meet their membership requirements.
  • All deposits up to $250,000 are protected by FDIC insurance at banks and credit unions, regardless of where you open the account.
  • Minimum deposit requirements range from zero to several thousand dollars depending on the institution.

Traditional Banks and Their Money Market Accounts

Most major banks — Bank of America, Wells Fargo, Chase, Citibank — offer money market accounts. The advantage is convenience: you can walk into a branch, speak to a person, and handle your account in person. You also get FDIC insurance protection up to $250,000, which is standard at all banks.

The trade-off is interest rate. Traditional banks typically pay lower rates than online banks because they maintain physical branches and staff. A traditional bank's money market account might pay 0.01% to 0.50% annual percentage yield (APY), while an online bank might pay 4% to 5% APY for the same type of account. That difference compounds significantly over time, especially on larger balances.

Minimum deposit requirements at traditional banks vary. Some require $2,500 to $10,000 to open a money market account; others have no minimum. Check the specific bank's website or call a branch to confirm their current requirements, as these change periodically.

Online Banks and Brokers — Where the Highest Rates Are

Online banks and online-only brokers — such as Marcus by Goldman Sachs, Ally Bank, American Express Personal Savings, Wealthfront, and Fidelity — typically offer the highest interest rates on money market accounts. Because they do not operate physical branches, their overhead is lower, and they pass some of that savings to customers in the form of higher rates.

You open an account entirely online through their website or mobile app. You fund it by transferring money from another bank account, and you manage it the same way — through the app or website. All deposits are still FDIC-insured up to $250,000 (or SIPC-protected if the account is held at a brokerage).

The downside is that you cannot walk into a physical location if you need help. Most online banks offer phone support and live chat, but if you prefer face-to-face service, this is not the right option. Minimum deposits at online banks are often zero or very low — sometimes $1 or $100 — making them accessible even if you are starting small.

Credit Unions and Member-Owned Institutions

Credit unions are member-owned financial cooperatives, and many offer money market accounts. To open an account at a credit union, you must first become a member, which usually requires meeting a membership criterion — working for a specific employer, living in a certain area, or belonging to a particular organization.

Credit unions often offer competitive interest rates and lower fees than traditional banks. They are also FDIC-insured (technically, they carry share insurance through the National Credit Union Administration, or NCUA, which provides the same $250,000 protection). If you already belong to a credit union or meet their membership requirements, it is worth comparing their money market rates to those at online banks.

To find a credit union you may be may be able to access to join, use the CO-OP Network search tool or the Shared Branch Locator on the Credit Union National Association website. These tools let you search by employer, location, or organization.

Comparing Rates and Fees Across Institutions

Interest rates on money market accounts change frequently — sometimes weekly — so comparing rates at the moment you are ready to open an account matters more than looking at historical rates. Use a rate-comparison site like Bankrate, DepositAccounts, or the Federal Reserve's National Information Center to see current rates across multiple institutions.

Beyond the interest rate, check the monthly maintenance fee (many institutions waive it if you maintain a minimum balance), the cost of overdrafts or excess withdrawals, and whether there is a penalty for closing the account early. Some accounts limit the number of withdrawals per month; federal rules previously capped this at six, but that rule was suspended in 2020 and has not been reinstated, so policies vary by institution.

Create a simple spreadsheet listing three to five institutions you are considering, their current APY, their minimum deposit, their monthly fee, and any withdrawal limits. This makes the comparison concrete and helps you see which account actually costs you the least or earns you the most over a year.

How to Open an Account Once You Have Chosen

At a traditional bank, you can open an account online, by phone, or in person. You will need a government-issued ID, your Social Security number, and proof of address (a recent utility bill or bank statement). The process usually takes 10 to 15 minutes.

At an online bank, the process is entirely digital. You provide the same information — ID, Social Security number, and address — through their website or app. Many online banks verify your identity instantly using third-party services. You then link a bank account to fund your new money market account, which typically takes one to three business days.

At a credit union, you first complete the membership process (which may be instant or may require approval), then open the money market account. Some credit unions let you do both online; others require a visit to a branch or a phone call.

FDIC Insurance and Account Safety

Deposits at banks are protected by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per depositor, per institution, per account type. This means if the bank fails, your money is protected. A money market account is a single account type, so if you have both a checking account and a money market account at the same bank, each is insured separately up to $250,000.

Credit unions carry the same protection through the National Credit Union Administration (NCUA). Online brokerages that are not banks — such as Fidelity or Wealthfront — carry SIPC (Securities Investor Protection Corporation) protection, which also covers up to $250,000 per account type.

This protection is automatic; you do not need to register or do anything. As long as your deposit is under $250,000 at a single institution, you are covered.

Frequently Asked Questions

Can I open a money market account online if I do not have a bank account yet?

Yes. Online banks will let you open a money market account with just an ID and Social Security number. You can then fund it by transferring money from another source — a friend's account, a paycheck via direct deposit, or a check you deposit through their mobile app. Some online banks also accept wire transfers or ACH transfers from employers.

What is the difference between opening at a bank versus an online broker like Fidelity?

A bank's money market account is a deposit product; a brokerage's money market account is an investment product. Both are insured (FDIC for banks, SIPC for brokerages), but the brokerage version may have slightly different rules around access and may be held in a brokerage account rather than a traditional deposit account. The interest rate and ease of use are often similar, so compare the specific rates and features.

Do I need a minimum balance to keep the account open?

It depends on the institution. Some banks require a minimum balance to earn interest or to avoid a monthly fee; others have no minimum. Online banks often have no minimum. Check the account terms before you open to understand what balance you need to maintain.

Can I move my money market account from one bank to another?

Yes. You can withdraw your money and transfer it to another institution at any time. There is no penalty or fee for moving your account (though some institutions charge a wire transfer fee if you use that method). The simplest way is to initiate an ACH transfer from your new bank, which pulls the money from your old account.

Which type of institution usually has the highest rates?

Online banks and online brokerages typically offer the highest rates because they have lower operating costs. Traditional banks and credit unions usually offer lower rates but may offer other benefits like branch access or lower fees. Compare current rates at the time you are ready to open, since rates change frequently.