A money market account holds your cash and pays you interest, but the rate changes based on what the Federal Reserve does and how much you keep in the account

A money market account is a savings account with a twist: the interest rate moves up and down instead of staying fixed. Your bank sets the rate based on current market conditions—mainly what the Federal Reserve's benchmark rate is doing and how much competition exists for deposits. When the Fed raises rates, your money market rate typically rises within weeks or months. When the Fed cuts rates, yours falls too. The bank also usually offers you a higher rate if you keep a larger balance, sometimes with tiers (for example, 4.50% on $10,000 to $24,999, and 4.75% on $25,000 and up).

The money sits in your account and earns interest daily or monthly, depending on the bank's terms. You can withdraw it whenever you want, though some accounts limit you to a certain number of withdrawals per month before charging a fee. The account is FDIC insured up to $250,000 per depositor per bank, so your principal is protected even if the bank fails.

Key Takeaways

  • Interest rates on money market accounts move with Federal Reserve policy and your account balance, not staying the same year to year.
  • Your money earns interest daily or monthly and you can withdraw it anytime, though some banks limit penalty-free withdrawals to a set number per month.
  • The account is FDIC insured up to $250,000, meaning your deposit is protected if the bank fails.
  • Banks compete for deposits by offering higher rates, so the rate you see today may be higher or lower than what a different bank offers.
  • Money market accounts are safer than stocks but pay less interest than certificates of deposit (CDs) that lock your money away for a fixed term.

Why banks offer different rates on the same day

Banks set their own money market rates. There is no single "the" money market rate—each institution decides what to pay based on how much deposit money they need right now and what their competitors are offering. On any given day, one bank might pay 4.25% while another pays 5.10% on the same type of account. This happens because banks are competing for your deposit dollars, and they adjust rates to attract or discourage new money.

The Federal Reserve's benchmark rate (called the federal funds rate) acts as a floor. When the Fed raises it, banks have more incentive to raise their rates because they can earn more on the money they lend out. When the Fed cuts it, banks cut their rates too—sometimes faster than they raised them. But the Fed does not set your bank's rate directly. Your bank decides how much of the Fed's rate change to pass along to you, and that decision depends on whether they need deposits or want to keep more cash on hand.

How interest accrues and when you see it in your account

Interest on a money market account accrues daily. That means the bank calculates how much you owe you each day based on your balance and the annual rate, then adds those daily amounts together. If your account holds $10,000 and the rate is 4.80% annually, the bank divides 4.80% by 365 days to get a daily rate of about 0.0131%, then multiplies that by your $10,000 balance. You earn roughly $1.31 that day. The next day, if your balance is still $10,000, you earn another $1.31, and so on.

The bank usually credits the interest to your account monthly, though some do it quarterly or even daily. When it posts, you see the new balance in your account. If you withdraw money mid-month, the interest you earned up to that point stays in the account; you do not lose it. However, some banks use a tiered rate structure, meaning if your balance drops below a threshold, your rate drops too—so withdrawing $15,000 from a $25,000 balance might drop you from the 4.75% tier to the 4.50% tier, and future interest accrues at the lower rate.

Withdrawal limits and what happens if you exceed them

Many money market accounts come with a limit on how many withdrawals or transfers you can make per month without a fee. The limit is often six per month, though some banks allow more or fewer. This rule exists because money market accounts are technically savings accounts under federal banking rules, and the regulation historically capped withdrawals. Even though that rule was relaxed in 2020, many banks kept the limit in place as a way to discourage frequent trading.

If you exceed the limit, the bank typically charges a fee—often $10 to $25 per excess withdrawal—or closes the account. Some banks will simply refuse the withdrawal and ask you to use a different account type. Before opening a money market account, check the bank's withdrawal policy. If you need to move money in and out frequently, a regular savings account or checking account may be a better fit, even if the interest rate is lower.

How money market accounts compare to other savings options

A money market account sits between a regular savings account and a certificate of deposit (CD) in terms of flexibility and interest rate. A regular savings account usually pays less interest (often 0.01% to 0.50%) because you can withdraw anytime with no penalty. A CD locks your money for a set term—three months, one year, five years—and pays a fixed rate that does not change. If you withdraw early, you pay a penalty. A money market account offers a middle ground: a higher rate than savings, but the ability to access your money without penalty.

The tradeoff is that your money market rate can fall. If you open an account at 5.00% and the Fed cuts rates, your rate may drop to 4.25% within a few months. With a CD, the rate is locked in, so you know exactly what you will earn. Money market accounts work best for money you want to keep safe and earning interest but may need within the next year or two. For money you will not touch for five years or more, a CD often pays more because the bank knows it has your money for longer.

What happens to your rate when the Federal Reserve moves

The Federal Reserve meets eight times per year to decide whether to raise, lower, or hold its benchmark rate steady. When the Fed raises rates, banks usually raise their money market rates within two to four weeks. When the Fed cuts rates, banks often cut faster—sometimes within days. The reason for the speed difference is that banks want to attract deposits when rates are rising (so they move quickly to stay competitive) but want to hold onto deposits when rates are falling (so they move slowly, hoping customers do not notice and move their money elsewhere).

You do not have to do anything when your rate changes. The bank updates it automatically. However, if your rate drops significantly and you see other banks offering much higher rates, you can move your money to a different bank. There is no penalty for closing a money market account and opening one elsewhere. Some people move their money every few months to chase the highest available rate, though the effort may not be worth it if the difference is only 0.25% or 0.50%.

Fees and costs that can eat into your earnings

Money market accounts can charge several types of fees. The most common are excess withdrawal fees (charged when you exceed the monthly withdrawal limit), monthly maintenance fees (usually $5 to $15, though many banks waive them if you maintain a minimum balance), and overdraft fees (if you accidentally withdraw more than your balance). Some banks also charge a fee to close the account early or to transfer money out.

Before opening an account, ask the bank about all fees and what conditions waive them. A $10 monthly maintenance fee on a $5,000 account earning 4.50% interest means you are paying $120 per year to earn roughly $225 in interest—a net gain of only $105. If you can find an account with no maintenance fee, you keep the full $225. Read the account agreement or call the bank's customer service line to get the complete fee schedule. Many online banks have lower or no fees because they have fewer physical branches to maintain.

Frequently Asked Questions

Can the bank lower my interest rate whenever it wants?

Yes. Banks can change money market rates at any time without notice, though most give you a few days' warning. The rate is not may provide. However, the bank cannot change fees or other account terms without giving you advance notice, usually 30 days. If you disagree with a rate cut, you can move your money to a different bank.

What if I need to withdraw money but I have already hit my withdrawal limit?

You can still withdraw the money, but the bank will charge a fee for the excess withdrawal—typically $10 to $25. Some banks will refuse the withdrawal and ask you to use a different account type instead. Check your account agreement or call the bank to find out their specific policy before you need the money.

Is my money safe in a money market account if the bank fails?

Yes, up to $250,000 per depositor per bank. The FDIC (Federal Deposit Insurance Corporation) insures money market accounts the same way it insures regular savings accounts. If the bank fails, the FDIC pays you back up to the limit. If you have more than $250,000, only the amount up to $250,000 is protected.

How often should I shop around for a better rate?

There is no set schedule, but checking rates every three to six months makes sense. If you find a bank offering 0.50% or more above your current rate, the effort to move your money may be worth it. If the difference is 0.10% or 0.25%, the hassle of switching may not be worth the extra earnings, especially on smaller balances.

Can I use a money market account as my main checking account?

Technically yes, but it is not ideal. Money market accounts usually come with limited check-writing or debit card access, and you may hit withdrawal limits if you use the account for everyday spending. A regular checking account is designed for frequent transactions and usually has no withdrawal limits, though it pays little or no interest.