What happens when you open and use a money market account
A money market account is a savings account that pays you interest on your balance, but with a catch: you can only withdraw money a limited number of times per month. Here's how it actually works in practice.
You deposit $5,000 into a money market account at your bank. The bank takes that $5,000 and lends most of it out to other customers (mortgages, car loans, credit cards). In return, the bank pays you interest—let's say 4.50% annually, though this rate changes. After one month, you've earned roughly $18.75 in interest (4.50% ÷ 12 months). That interest gets added to your account, so your balance is now $5,018.75.
The next month, you earn interest on the new balance, not just the original deposit. This is called compound interest—you earn interest on your interest. Over a year, that $5,000 grows to about $5,230 without you adding another dollar.
Key Takeaways
- Money market accounts pay interest on your balance, and that interest compounds monthly, meaning you earn interest on your interest.
- Most banks limit you to six withdrawals per month (or per statement cycle), though you can make unlimited deposits and transfers in.
- The interest rate is variable, meaning it can go up or down based on what the Federal Reserve does, so your earnings change over time.
- If you exceed the withdrawal limit, the bank charges a fee (usually $25 to $35 per excess withdrawal) or may close the account.
- Money market accounts are FDIC-insured up to $250,000, so your money is protected even if the bank fails.
How the withdrawal limit actually works
The six-withdrawal limit is the part that trips people up. You can withdraw money six times per month—that includes ATM withdrawals, checks you write, transfers to another account, and debit card transactions. Deposits and transfers in don't count against the limit.
Let's say you have $5,000 in your money market account. You withdraw $200 at an ATM (withdrawal one). Three days later, you write a check for $150 (withdrawal two). A week later, you transfer $300 to your checking account (withdrawal three). You're still well within the limit. But if you make a fourth withdrawal before the month ends and your bank enforces the limit strictly, you'll be charged a fee on that transaction.
Different banks handle excess withdrawals differently. Some charge a flat fee per excess withdrawal. Others close the account after repeated violations. A few banks have stopped enforcing the limit altogether, though they still reserve the right to. When you open an account, the bank will tell you their specific policy in the account agreement.
How interest rates change and what that means for you
The interest rate on a money market account is variable, which means the bank can change it whenever it wants. The rate usually moves up or down based on what the Federal Reserve does with its benchmark interest rate, but banks don't have to match the Fed exactly or on any schedule.
When the Fed raises rates, banks typically raise money market rates within weeks or months because they're competing to attract deposits. When the Fed cuts rates, banks often cut money market rates faster—sometimes within days. This means your earnings can shrink even though you haven't touched your account.
For example: You open a money market account at 4.50% in January. By June, the Fed has cut rates, and your bank drops your rate to 3.75%. Your $5,000 now earns less interest per month. This is why money market accounts are better for money you won't need immediately—you're trading access for interest, but that interest isn't may provide to stay the same.
A real example: tracking your balance over three months
Here's what actually happens to a real account over time:
| Month | Starting Balance | Interest Rate | Interest Earned | Withdrawals | Deposits | Ending Balance |
|---|---|---|---|---|---|---|
| January | $5,000.00 | 4.50% | $18.75 | $0 | $0 | $5,018.75 |
| February | $5,018.75 | 4.50% | $18.82 | $500 | $1,000 | $5,537.57 |
| March | $5,537.57 | 4.25% | $19.69 | $200 | $0 | $5,357.26 |
In January, you earn $18.75 on your $5,000. In February, the bank pays you $18.82 because your balance is slightly higher (the interest from January plus your new deposit). In March, the rate drops to 4.25%, so even though your balance is still over $5,000, you earn less interest that month. Withdrawals reduce your balance immediately, which means less interest the following month.
Why the withdrawal limit exists
The six-withdrawal limit comes from a Federal Reserve regulation (Regulation D) that used to apply to all savings accounts. The rule was designed to keep banks from turning savings accounts into checking accounts—if people could withdraw unlimited times, banks couldn't count on having money available to lend out.
The Fed relaxed this rule in 2020, and many banks dropped the limit. But some banks kept it because it helps them manage their cash flow and because customers who make frequent withdrawals are more expensive to serve. If you need to withdraw money more than six times a month, a regular savings account or checking account is a better fit than a money market account.
How FDIC insurance protects your money
Money market accounts are FDIC-insured, which means if your bank fails, the government guarantees your money up to $250,000. This protection applies to each account you hold separately—so if you have a money market account and a savings account at the same bank, each is insured up to $250,000.
FDIC insurance is automatic. You don't sign up for it or pay for it. The bank pays a small fee to the FDIC, and that fee is built into how the bank operates. If the bank goes under, the FDIC steps in and makes sure you get your money back, up to the limit. This is why money market accounts are considered very safe places to keep money you might need in the next few years.
Money market accounts versus other savings options
A money market account pays more interest than a regular savings account because of the withdrawal limit—you're giving up access in exchange for higher earnings. A high-yield savings account often pays similar interest to a money market account but without the withdrawal limit, though these accounts may have higher minimum balances.
A certificate of deposit (CD) pays even more interest, but you have to lock your money away for a set period (three months, one year, five years). If you withdraw early, you pay a penalty. A money market account gives you the middle ground: better interest than a regular savings account, but the ability to access your money if you need it (up to six times per month).
If you're saving for something specific that you'll need in six months to two years, a money market account makes sense. If you need to withdraw frequently, a high-yield savings account is better. If you won't touch the money for years, a CD usually pays more.
Frequently Asked Questions
What counts as a withdrawal from a money market account?
ATM withdrawals, checks you write, transfers to another bank, and debit card transactions all count. Deposits and transfers in do not count. Some banks also don't count transfers between your own accounts at the same bank, but you should confirm this with your bank before opening an account.
Can I lose money in a money market account?
No. Your principal (the money you deposit) is protected by FDIC insurance and cannot go down. The interest rate can drop, so you earn less, but your balance never shrinks unless you withdraw money yourself.
How often does the interest rate change?
There's no set schedule. Banks can change the rate whenever they want, though they usually notify you in advance. Rates tend to move when the Federal Reserve changes its benchmark rate, but banks don't have to move at the same time or by the same amount.
Is a money market account the same as a money market fund?
No. A money market account is a bank product insured by the FDIC. A money market fund is an investment product sold by brokerages and mutual fund companies, and it is not FDIC-insured. They have different risks and rules.
What happens if I exceed the six-withdrawal limit?
Most banks charge a fee (typically $25 to $35) for each excess withdrawal. Some banks may close the account if you repeatedly exceed the limit. Check your account agreement or call your bank to find out their specific policy.