A money market account is a hybrid savings product that combines features of a checking account and a savings account, with interest rates that move based on market conditions.

Money market accounts (MMAs) hold your money in a savings vehicle that typically offers higher interest rates than standard savings accounts, but with restrictions on how often you can withdraw. The account is called "money market" because the bank uses your deposit to invest in short-term, low-risk securities—things like Treasury bills and commercial paper—rather than holding cash in a vault. The interest rate you earn reflects what those investments return, which is why rates fluctuate rather than staying fixed.

The trade-off is access. Most MMAs limit you to a set number of withdrawals per month (often six), and some require a higher minimum balance to open or maintain the account. If you exceed the withdrawal limit, the bank may charge a fee, convert your account to a regular savings account, or close it. This structure makes MMAs useful for money you want to grow but won't need to touch frequently.

Key Takeaways

  • Money market accounts earn interest rates that change based on what the bank earns from short-term investments, so your rate can go up or down.
  • Most MMAs limit withdrawals to six per month, and exceeding that limit triggers fees or account restrictions.
  • Minimum opening balances for MMAs typically range from $1,000 to $25,000, depending on the bank, and some require you to maintain that balance to keep the account open.
  • Your deposits in an MMA are insured up to $250,000 by the FDIC (or NCUA if held at a credit union), the same as any other deposit account.
  • Money market accounts are best for money you want to earn interest on without needing frequent access, such as an emergency fund or short-term savings goal.

How the interest rate works on a money market account

The interest rate on an MMA is variable, meaning it changes when the bank decides to change it. Banks set these rates based on what they earn from investing your deposit in short-term debt securities—primarily Treasury bills, which are government IOUs that mature in less than a year. When the Federal Reserve raises its benchmark interest rate, banks typically raise MMA rates. When the Fed cuts rates, banks usually lower them.

You do not have control over when or how much the rate changes. A bank can lower your rate without notice, and some banks do so frequently. A few banks advertise "tiered" rates, where the interest rate you earn depends on your balance—a higher balance earns a higher rate. Others offer promotional rates for new accounts that revert to a lower standard rate after a set period, usually three to six months.

The actual rate you receive depends on the bank. Online banks and credit unions often offer higher rates than brick-and-mortar banks because they have lower overhead costs. Comparing rates across institutions is straightforward: most banks publish their current MMA rates on their websites, and sites like Bankrate and DepositAccounts track rates across multiple banks in real time.

Withdrawal limits and how they work

Federal rules historically capped MMA withdrawals at six per month, though this rule was suspended during the COVID-19 pandemic and has not been formally reinstated. However, most banks still enforce a six-withdrawal limit as a matter of policy. The limit typically applies to transfers and withdrawals combined—so a transfer to another bank, a check you write, and a debit card withdrawal all count toward the same limit.

In-person withdrawals at a branch or ATM often do not count against the limit, depending on the bank's terms. Some banks count only electronic transfers and checks. Read the account agreement carefully, because the rules vary. If you exceed the limit, the bank may charge a fee (typically $10 to $25 per excess transaction), or it may close the account or convert it to a regular savings account with no withdrawal restrictions but a lower interest rate.

This structure means an MMA is not suitable for money you need to access regularly. If you need to withdraw more than six times a month, a regular savings account or checking account is a better fit, even if the interest rate is lower.

Minimum balance requirements and account maintenance

Most banks require a minimum opening balance to open an MMA, typically ranging from $1,000 to $25,000. Some banks have no minimum, particularly online banks. Beyond the opening balance, many banks also require you to maintain a minimum balance to keep the account open and earn the advertised interest rate. If your balance falls below the minimum, the bank may charge a monthly fee, lower your interest rate, or close the account.

The minimum balance requirement is usually stated in the account agreement, and you can find it on the bank's website or by calling customer service. Online banks tend to have lower or no minimum balance requirements than traditional banks. If maintaining a high minimum balance is difficult for you, comparing minimums across banks is worth the time—the difference between a $10,000 minimum and no minimum can matter.

FDIC insurance and account safety

Money held in an MMA at an FDIC-insured bank is protected up to $250,000 per depositor, per bank, per account type. This means if the bank fails, the FDIC will reimburse you for your balance up to that limit. Credit unions offer the same protection through the NCUA (National Credit Union Administration) up to $250,000.

The $250,000 limit applies to each account type separately. So if you hold both an MMA and a regular savings account at the same bank, each is insured up to $250,000. If you hold an MMA in your name alone and another MMA as a joint account with your spouse at the same bank, each is insured separately up to $250,000. If you have more than $250,000 to deposit, you can spread it across multiple banks to keep all of it insured.

Money market accounts versus savings accounts and money market funds

A money market account is not the same as a money market fund, even though the names are similar. An MMA is a bank deposit account insured by the FDIC. A money market fund is an investment product sold by brokerages and mutual fund companies, not insured by the FDIC, and carries the risk that the fund's value could decline. Money market funds are used by investors who want to park cash short-term while earning a return; they are not suitable for emergency funds or money you cannot afford to lose.

A regular savings account and an MMA both earn interest and are FDIC-insured, but a savings account typically has no withdrawal limits and a lower interest rate. An MMA offers a higher rate in exchange for accepting withdrawal restrictions. If you rarely withdraw money and want the highest possible interest rate, an MMA makes sense. If you need frequent access or want simplicity, a savings account is often the better choice.

High-yield savings accounts (HYSAs) offered by online banks blur this distinction. Many HYSAs offer rates comparable to or higher than MMAs, with no withdrawal limits and no minimum balance requirements. The main reason to choose an MMA over an HYSA is if the MMA's rate is significantly higher—which happens occasionally but is not the norm.

When a money market account makes sense for your situation

An MMA works well for money you want to set aside and leave untouched. Common uses include building an emergency fund (three to six months of expenses), saving for a down payment on a home or car, or holding money for a planned expense a year or two away. The higher interest rate means your money grows faster than it would in a regular savings account, and the withdrawal limits enforce the discipline of not dipping into the account on impulse.

An MMA is less suitable if you need to withdraw money frequently, if you cannot maintain the minimum balance, or if you want a may provide fixed rate. If your bank's MMA rate is lower than what online banks are offering, moving your money to an online bank's high-yield savings account may give you better returns with fewer restrictions.

Frequently Asked Questions

Can I use a debit card to withdraw from a money market account?

Some banks issue debit cards for MMAs, but the card withdrawal typically counts toward your monthly withdrawal limit. Other banks do not issue debit cards for MMAs at all. Check your bank's account agreement or call customer service to confirm whether debit card withdrawals count against the limit.

What happens if I exceed the withdrawal limit?

The bank will charge a fee (usually $10 to $25 per excess transaction), or it may convert your account to a regular savings account with a lower interest rate. Some banks close the account if you repeatedly exceed the limit. The exact consequence depends on the bank's policy, stated in your account agreement.

Is the interest rate on a money market account may provide?

No. The rate is variable and can change at any time. The bank is not required to notify you in advance, though most do. If rates drop, your earnings will decrease. If rates rise, your earnings will increase. This is why comparing rates across banks periodically is useful—if your current bank's rate falls significantly behind others, moving your money may make sense.

Can I open a money market account if I have bad credit?

Yes. Banks do not check your credit score to open a savings or money market account. They may check ChexSystems, a banking history database, to see if you have had problems with past accounts (like overdrafts or fraud). If you have been denied a bank account before, ask the bank whether ChexSystems is the reason and what you can do to address it.

How is a money market account different from a certificate of deposit?

A certificate of deposit (CD) locks your money away for a set term—typically three months to five years—in exchange for a fixed interest rate. An MMA lets you access your money anytime (within the withdrawal limit) but offers a variable rate. CDs pay more if rates are high when you open them, but you cannot benefit if rates rise further. MMAs let you benefit from rate increases but expose you to rate decreases.