Banks and credit unions are your main options, each with different minimums and rates

You can open a money market account at a traditional bank, an online bank, or a credit union. Traditional banks (Chase, Bank of America, Wells Fargo) offer in-person service but typically pay lower interest rates. Online banks (Marcus, Ally, American Express Personal Savings) have no physical branches but usually offer higher rates because their overhead is lower. Credit unions are member-owned institutions that often pay competitive rates and charge lower fees, though you must meet membership requirements — usually living or working in a specific area, or belonging to a particular employer or organization.

The choice depends on what matters most to you: convenience of a local branch, the highest interest rate available, or lower fees. Each type has trade-offs. A traditional bank near your home is useful if you deposit cash frequently or need to speak with someone in person. An online bank pays more interest but requires you to transfer money electronically. A credit union may offer both, but membership rules can be restrictive.

Key Takeaways

  • Online banks typically offer the highest interest rates on money market accounts because they have lower operating costs than brick-and-mortar banks.
  • Traditional banks offer in-person service and local branches but usually pay lower rates and charge higher monthly fees.
  • Credit unions often offer competitive rates and lower fees, but you must meet membership requirements before you can open an account.
  • Minimum opening deposits range from zero to $25,000 depending on the institution and account type, so compare before you commit.
  • All deposits at FDIC-insured banks and NCUA-insured credit unions are protected up to $250,000, so safety does not differ between institution types.

Online banks typically pay the highest rates

Online banks have no physical locations, so they pass savings to customers through higher interest rates. Marcus by Goldman Sachs, Ally Bank, American Express Personal Savings, and Discover Bank are among the largest. Most have no monthly maintenance fees and no minimum opening deposit, though some require $1 to $25 to open. You fund the account by transferring money from another bank, and you withdraw the same way — there is no way to walk in and hand over cash.

The trade-off is that you cannot deposit cash directly or speak to someone at a branch. If you need to deposit checks, most online banks let you photograph them with a mobile app. If you need cash urgently, you can transfer to another bank account (usually within one to three business days) or use an ATM network partner, though some charge a fee for out-of-network withdrawals.

Interest rates at online banks change frequently and vary by account size. As of early 2024, some online banks paid 4% to 5% on money market accounts, but this shifts with Federal Reserve decisions. Check the current rate at the bank's website before opening, because the rate you see today may not be the rate you earn next month.

Traditional banks offer branches but lower rates and higher fees

Banks like Chase, Bank of America, Wells Fargo, and regional banks have physical locations where you can deposit cash, speak to a banker, and withdraw money immediately. Many offer money market accounts, though the rates are usually lower than online banks — often 0.5% to 2% depending on the bank and account size. Monthly maintenance fees are common, ranging from $10 to $25, though some banks waive the fee if you maintain a minimum balance (often $2,500 to $10,000).

Minimum opening deposits at traditional banks are typically $1,000 to $25,000, which is higher than online banks. Some accounts require you to maintain that minimum or pay a fee. If you already bank at a traditional institution, opening a money market account there is straightforward — you can do it in person or online using your existing customer information.

The advantage of a traditional bank is convenience: you can deposit cash without a transfer, ask questions face-to-face, and access your money immediately at a branch. The disadvantage is cost — lower rates and higher fees mean your money grows more slowly than it would at an online bank.

Credit unions often offer competitive rates with lower fees

Credit unions are nonprofit institutions owned by their members. They often pay rates competitive with online banks and charge lower or no monthly fees. Examples include Navy Federal Credit Union, Connexus Credit Union, and Pentagon Federal Credit Union, though thousands of smaller credit unions exist nationwide. To open an account, you must first become a member, which requires meeting the credit union's field of membership — this might mean living in a certain county, working for a specific employer, belonging to an organization, or having a family member who is already a member.

Once you are a member, opening a money market account is usually simple and can be done online or in person. Minimum deposits vary widely, from zero to $500. Interest rates and fee structures vary by credit union, so compare a few before joining. Some credit unions are part of shared branching networks, meaning you can conduct transactions at other credit unions' branches even if you do not live near your own.

The main barrier to credit unions is membership may be able to access. If you do not meet the field of membership, you cannot open an account. Some credit unions have relaxed their rules in recent years — for example, some now allow anyone in a certain state to join, or anyone with a family member who works in a particular industry. Check the specific credit union's membership requirements on their website.

Compare minimum deposits, fees, and current rates before choosing

Before opening an account, gather information from at least three institutions: one online bank, one traditional bank, and one credit union (if you are may be able to access). Write down the minimum opening deposit, any monthly maintenance fees, the current interest rate, and whether the rate is promotional or permanent. A promotional rate might be high for three months, then drop — read the fine print.

Calculate what you will actually earn. If you plan to keep $10,000 in the account, a 4.5% rate at an online bank earns $450 per year, while a 0.75% rate at a traditional bank earns $75 per year — a difference of $375. Subtract any monthly fees from that number. If the traditional bank charges $15 per month ($180 per year), your net earnings drop to negative $105, meaning the account costs you money.

Use a rate comparison tool like Bankrate, DepositAccounts, or the Federal Deposit Insurance Corporation (FDIC) website to see current rates across institutions. These tools update frequently and let you filter by account type, minimum deposit, and institution type. Once you have narrowed your choices, visit each institution's website to confirm the rate and fee structure, because comparison sites sometimes lag behind real-time changes.

Verify FDIC or NCUA insurance before opening

All deposits at FDIC-insured banks are protected up to $250,000 per depositor, per bank. All deposits at NCUA-insured credit unions are protected up to $250,000 per depositor, per credit union. This protection is the same whether you bank online or in person, and whether you pay high fees or low fees — the insurance does not change.

Before opening an account, confirm that the institution is FDIC- or NCUA-insured. Banks and credit unions are required to display this information on their website and in their lobby. You can also search the FDIC's Bank Find tool or the NCUA's Credit Union Locator to verify. If an institution is not insured, your money is not protected if the institution fails — this is rare but possible.

Steps to open an account once you have chosen an institution

Most institutions let you open a money market account online in 10 to 15 minutes. You will need your Social Security number, a government-issued ID, your current address, and a funding source (another bank account for online banks, or cash/check for traditional banks and credit unions). Some institutions ask additional questions about your employment or income, though this is less common for savings accounts than for credit accounts.

After you submit your information, the institution verifies your identity and may place a temporary hold on your account while they confirm your funding source. This usually takes one to three business days. Once the account is active, you can begin depositing and earning interest. Your first statement will show the interest earned, the current balance, and any fees charged.

Frequently Asked Questions

Can I open a money market account online if I do not have an existing account at that bank?

Yes. Most banks and credit unions let you open a money market account online without having another account there first. You will need to provide your Social Security number, ID, and a funding source (another bank account). The process usually takes 10 to 15 minutes, and the account becomes active within one to three business days.

What is the difference between opening at an online bank versus a traditional bank?

Online banks have no physical branches, so you cannot deposit cash or speak to someone in person, but they pay higher interest rates and charge lower fees. Traditional banks have branches where you can deposit cash and get face-to-face help, but they pay lower rates and charge higher fees. The choice depends on whether you value convenience or higher earnings.

Do I need a minimum amount of money to open a money market account?

Minimum opening deposits vary. Online banks often require zero to $25. Traditional banks typically require $1,000 to $25,000. Credit unions vary widely, from zero to $500. Check the specific institution's requirements before opening — some waive the minimum if you set up automatic transfers.

Is my money safe at an online bank?

Yes, if the online bank is FDIC-insured. You can verify this on the bank's website or by searching the FDIC's Bank Find tool. FDIC insurance protects up to $250,000 per depositor, per bank, whether the bank is online or has physical branches. Safety does not depend on whether you can walk into a branch.

Can I move my money market account to a different bank later?

Yes. You can close the account and transfer the money to another bank at any time. There is no penalty for closing a savings or money market account. Some institutions offer to move your money for you as part of the opening process — ask if this service is available.