How money market accounts earn and pay you interest

A money market account is a savings account that pays interest based on how much money you keep in it and how long you keep it there. The bank takes your deposit, lends it out to other customers or invests it, and shares a portion of what it earns back to you as interest. The interest rate changes—sometimes weekly, sometimes monthly—depending on what the Federal Reserve does and what other banks are offering.

You earn interest on your entire balance, not just new deposits. If you have $10,000 in the account and the rate is 4.5% annually, the bank calculates interest daily or monthly (depending on the account terms) and adds it to your balance. The more money you keep in the account and the longer you leave it untouched, the more interest accumulates.

Interest rates on money market accounts vary by bank and change frequently. Online banks typically offer higher rates than brick-and-mortar banks because they have lower overhead costs. Rates also depend on how much you deposit—some banks pay more if you maintain a higher minimum balance. You can compare current rates across banks before opening an account, but know that the rate you see today may be different in three months.

Key Takeaways

  • Money market accounts pay interest that changes based on Federal Reserve policy and bank competition, so your rate may be higher or lower next month than it is today.
  • You can withdraw money from a money market account, but federal rules limit you to six transfers or withdrawals per month—exceeding this limit may result in fees or account closure.
  • Your deposits are insured up to $250,000 per bank by the FDIC, so your money is protected even if the bank fails.
  • Money market accounts require a minimum deposit to open, which ranges from $0 to $25,000 depending on the bank, and some banks charge monthly fees if your balance drops below a certain level.
  • Interest compounds—meaning you earn interest on your interest—so leaving money untouched for longer periods grows your balance faster than making frequent withdrawals.

Withdrawal limits and how they work

Federal law caps the number of withdrawals and transfers you can make from a money market account at six per month. This rule exists because money market accounts are savings accounts, not checking accounts—the bank expects you to keep money there, not move it constantly. The six-withdrawal limit includes transfers to other accounts, payments to third parties, and ATM withdrawals, but it does not include deposits or withdrawals made in person at a bank branch.

If you exceed six withdrawals in a month, the bank can charge a fee (usually $10 to $25 per excess withdrawal) or close your account. Some banks are stricter than others—a few will close your account after one violation, while others allow one or two overages before taking action. Check your account agreement to see your specific bank's policy.

The six-withdrawal limit is why money market accounts work best for money you do not need to touch often. If you need frequent access to your cash, a regular savings account or checking account is a better choice, even if the interest rate is lower.

Minimum deposits and monthly fees

Most banks require an opening deposit to start a money market account, ranging from $0 at some online banks to $25,000 at premium accounts offered by larger institutions. The higher the minimum, the higher the interest rate is usually—banks reward customers who deposit more money upfront.

After you open the account, some banks charge a monthly maintenance fee if your balance falls below a certain threshold. A common threshold is $2,500 or $10,000, depending on the bank. If you drop below that level, you might pay $5 to $15 per month until your balance climbs back up. Other banks waive the fee if you maintain a certain number of deposits per month or set up automatic transfers.

Before opening an account, compare not just the interest rate but also the minimum deposit, the balance threshold for avoiding fees, and what actions waive the fee. A slightly lower interest rate at a bank with no monthly fees can leave you with more money than a higher rate at a bank that charges you $10 every month your balance dips.

FDIC insurance and what happens if the bank fails

Your money in a money market account is insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per depositor per bank. This means if the bank fails, the FDIC will return your money up to that limit. You do not have to do anything to activate this protection—it is automatic for all deposits at FDIC-insured banks.

The $250,000 limit applies per bank, not per account. If you have a money market account and a savings account at the same bank, the FDIC combines them and insures the total up to $250,000. If you have accounts at two different banks, each bank's deposits are insured separately up to $250,000.

Bank failures are rare in the United States. The last major wave occurred during the 2008 financial crisis. Since then, federal oversight has tightened, and most banks maintain capital reserves to stay solvent. Still, the FDIC insurance exists precisely so you do not have to worry about losing your savings if something goes wrong.

How interest compounds and grows your balance

Interest compounds when the bank adds earned interest to your balance, and then you earn interest on that new, larger balance. If you deposit $10,000 at 4.5% annual interest and leave it untouched for a year, you earn $450. The next year, you earn interest on $10,450, not just the original $10,000. Over time, this compounding effect accelerates your growth.

The frequency of compounding matters. Some banks compound interest daily, others monthly, and a few quarterly. Daily compounding grows your money slightly faster than monthly compounding because interest is calculated and added more often. The difference is small for most balances, but over years it adds up.

Compounding works in your favor only if you leave the money alone. Every withdrawal resets the clock—you lose the interest you would have earned on that withdrawn amount. This is why money market accounts are best for emergency funds or money you are saving toward a specific goal, not for money you need to access regularly.

Interest rate changes and how to monitor them

Money market account rates move in response to the Federal Reserve's decisions about short-term interest rates. When the Fed raises its benchmark rate, banks typically raise the rates they pay on savings accounts within days or weeks. When the Fed cuts rates, banks lower savings rates shortly after. This means your rate can change multiple times per year.

You do not have to do anything when your rate changes—the bank adjusts it automatically. However, you should check your rate periodically (at least quarterly) to see if it has dropped significantly. If your bank's rate falls far below what competitors are offering, you can move your money to a higher-paying bank. There is no penalty for closing a money market account and opening one elsewhere.

Some banks notify customers when rates change, but many do not. Log into your account online or call the bank to see your current rate. Websites like Bankrate and DepositAccounts track rates across banks and update them daily, so you can compare your bank's rate to others without calling around.

Money market accounts versus other savings options

Money market accounts sit between regular savings accounts and certificates of deposit (CDs). A regular savings account offers lower interest but no withdrawal limits. A CD locks your money away for a set period (three months to five years) and pays a higher rate, but you pay a penalty if you withdraw early. A money market account offers a middle ground: higher interest than a savings account and the ability to withdraw money, but with the six-withdrawal limit.

If you need to access your money frequently, a regular savings account or checking account is better even if the rate is lower. If you can lock money away for months or years, a CD usually pays more. Money market accounts work best for money you want to keep safe and earning interest but may need to touch occasionally—like an emergency fund or money you are saving for a down payment.

Some people use money market accounts as a holding place while they decide what to do with a lump sum. You earn interest while you think, and if you need the money quickly, you can withdraw it without penalty (as long as you stay within the six-withdrawal limit).

Frequently Asked Questions

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

Most money market accounts do not come with a debit card. You can withdraw money by visiting a branch in person, transferring to another account, or requesting a check. Some banks offer limited ATM access, but each ATM withdrawal counts toward your six-withdrawal limit. Check with your bank about what withdrawal methods are available.

What happens if I exceed the six-withdrawal limit?

The bank can charge a fee per excess withdrawal (typically $10 to $25) or convert your account to a checking account, which may have different terms and lower interest. Some banks close accounts after repeated violations. Review your account agreement to see your bank's specific policy.

Is a money market account the same as a money market fund?

No. A money market account is a bank savings account insured by the FDIC. A money market fund is an investment product sold by brokerages and mutual fund companies that is not FDIC-insured. Money market funds can lose value, while money market accounts cannot. Do not confuse the two.

Can I earn more interest by moving my money to a different bank?

Yes, if your current bank's rate has fallen significantly below what competitors offer. You can close your account and open one at a higher-paying bank. There is no penalty for switching, and you will not lose any interest you have already earned. Just make sure the new bank's rate is high enough to offset any fees or minimum balance requirements.

Do I pay taxes on money market account interest?

Yes. Interest earned on a money market account is taxable income. The bank will send you a 1099-INT form at the end of the year showing how much interest you earned, and you report that amount on your tax return. The interest is taxed at your ordinary income tax rate, not at the capital gains rate.