What a money market account is and how your money moves

A money market account is a savings account that pays interest and lets you write checks or make transfers, but limits how often you can withdraw. The bank pools your money with other depositors' money and invests it in short-term debt—Treasury bills, commercial paper, certificates of deposit from other banks. The interest you earn comes from what those investments return, minus the bank's cut.

The account sits between a regular savings account and a money market fund. A savings account at a bank is FDIC-insured up to $250,000 per depositor per institution, but pays almost nothing. A money market fund at a brokerage is not insured by the FDIC, but can pay more because it invests in a wider range of instruments. A money market account at a bank gives you insurance and a higher rate than savings, but lower rates than you might get elsewhere and withdrawal limits that matter.

Money moves in and out on a schedule the bank sets. You can deposit money anytime. Withdrawals are the constraint: federal rules allow six per month (though this rule is currently suspended, banks still enforce their own limits). Some banks let you write checks directly from the account; others require you to transfer money to a checking account first, then write the check. The transfer itself counts as a withdrawal.

Key Takeaways

  • A money market account pays interest higher than a savings account but lower than you might earn in a money market fund or CD, and your deposits are FDIC-insured up to $250,000.
  • Banks limit withdrawals to a certain number per month (often three to six), and each withdrawal—whether by check, transfer, or debit card—counts toward that limit.
  • The interest rate varies by bank and changes monthly or quarterly, so the rate you see today will not be the rate you earn six months from now.
  • Money market accounts work best for money you need to access occasionally but not frequently, such as an emergency fund or a down payment you are saving toward.

How interest rates work and what you actually earn

The bank publishes an Annual Percentage Yield (APY), which is the rate you earn per year if you leave the money untouched. The APY varies by bank and by how much you deposit. A bank might offer 4.50% APY on balances of $25,000 or more and 3.75% APY on balances under $25,000. That difference matters: on $25,000, the gap is $187.50 per year.

The rate changes. Banks adjust APY weekly or monthly based on what the Federal Reserve does and what other banks are offering. If you opened an account at 4.50% in January, the bank might lower it to 4.25% in March. You do not have to do anything—the new rate applies automatically. This is why money market accounts are not a "set it and forget it" product. If rates drop and you have money sitting there, you are earning less than you could elsewhere.

Interest compounds daily or monthly, depending on the bank. Compounding means the bank pays interest on the interest you already earned. On $50,000 at 4.50% APY compounded daily, you earn about $2,500 per year, paid out in small increments each day. The difference between daily and monthly compounding is small—usually less than $10 per year on typical balances—but daily is better.

Withdrawal limits and what happens if you exceed them

Federal Regulation D historically capped withdrawals at six per month. That rule was suspended in 2020 and has not been reinstated, but banks still enforce their own limits. Most banks allow three to six withdrawals per month. Some allow unlimited transfers to your own accounts at the same bank but count transfers to outside banks as withdrawals. Others count checks written against the account as withdrawals.

If you exceed the limit, the bank may charge a fee (typically $25 to $35 per excess withdrawal), close the account, or convert it to a savings account with no check-writing. The penalty varies by bank and is spelled out in the account agreement you sign when you open it. Read that section before you open the account, because the limit affects whether the account suits your needs.

The withdrawal limit is why money market accounts work for some goals and not others. If you are saving for a down payment and expect to touch the money once or twice a year, a money market account is fine. If you are using it as a checking account because the interest is better, you will hit the limit and face fees. For frequent access, use a checking account or a high-yield savings account with no withdrawal limits.

Fees that reduce what you earn

Money market accounts carry several possible fees. A monthly maintenance fee (typically $10 to $15) is charged if your balance falls below a minimum, often $2,500 or $10,000. An excess withdrawal fee ($25 to $35) is charged each time you exceed the monthly withdrawal limit. An overdraft fee ($35 to $40) is charged if you write a check or make a transfer that exceeds your balance. Some banks charge an inactivity fee if you do not make a deposit or withdrawal for a set period, usually six months to a year.

These fees compound. If you maintain a $5,000 balance at 4.50% APY, you earn about $225 per year. A $10 monthly maintenance fee costs $120 per year. You net $105—less than a high-yield savings account at the same bank that charges no fee. Before you open an account, add up the fees you are likely to pay and subtract them from the interest you expect to earn. If fees exceed interest, the account costs you money.

Some banks waive fees if you meet conditions: maintaining a minimum balance, setting up direct deposit, or linking a checking account. Ask the bank what those conditions are and whether you can meet them. A fee waiver can make a money market account worthwhile; without it, often it is not.

Money market accounts versus other savings options

A high-yield savings account at the same bank usually pays the same or higher interest, charges no withdrawal fees, and has no withdrawal limit. The only reason to choose a money market account over a high-yield savings account is if you want check-writing capability. If you do not need checks, the savings account is better.

A certificate of deposit (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 (usually three to six months of interest). CDs pay more than money market accounts because you cannot touch the money. If you know you will not need the money for a year, a one-year CD at 4.75% beats a money market account at 4.50%. If you might need it sooner, the money market account is safer because you can withdraw without penalty.

A money market fund at a brokerage (Vanguard, Fidelity, Schwab) invests in the same short-term debt as a bank money market account but is not FDIC-insured. It pays higher interest because it has lower overhead and can invest in a broader range of instruments. The trade-off is that your money is not insured if the fund fails. For most people, FDIC insurance is worth the lower rate.

A regular savings account at a bank pays almost nothing—often 0.01% APY—but has no withdrawal limits and no fees. Use it only if you need instant access and do not care about interest.

How to open an account and what documents you need

You need a Social Security number or Individual Taxpayer Identification Number (ITIN), a government-issued ID, and proof of address. Proof of address can be a recent utility bill, lease, mortgage statement, or bank statement. Some banks accept a driver's license as both ID and proof of address if the address on it is current.

You can open an account online, by phone, or in person. Online is fastest—usually 5 to 10 minutes. The bank will ask your name, address, date of birth, and Social Security number. It will run a background check through ChexSystems, which is a database of banking history. If you have unpaid overdrafts or closed accounts due to fraud at another bank, ChexSystems will flag it and the bank may deny you. You can request your ChexSystems report for free at www.chexsystems.com.

After you open the account, the bank will send you a debit card and checks (if the account includes check-writing). Checks take 7 to 10 business days to arrive. You can start depositing money immediately by transfer from another bank account or by mobile check deposit if the bank offers it.

FDIC insurance and what it covers

Your money market account is insured by the FDIC up to $250,000 per depositor per bank. If the bank fails, the FDIC pays you up to that limit. If you have $300,000 in a money market account at one bank, $250,000 is insured and $50,000 is not.

The $250,000 limit applies to all deposit accounts you own at the same bank combined. If you have a $150,000 money market account and a $120,000 savings account at the same bank, only $250,000 total is insured. The other $20,000 is not. If you want to insure more than $250,000, open accounts at different banks. Each bank's FDIC insurance is separate.

FDIC insurance does not cover investment products like stocks, bonds, or mutual funds, even if you buy them through the bank. It covers only deposits—checking, savings, money market, and CD accounts. If you have a brokerage account at the bank, that money is not FDIC-insured.

Frequently Asked Questions

Can I write checks from a money market account?

Most money market accounts allow check-writing, but some do not. The bank will tell you when you open the account whether checks are included. If they are, you can write checks directly against the account, and each check counts as a withdrawal toward your monthly limit. If they are not, you must transfer money to a checking account first, then write the check.

What happens if I need to withdraw more than my limit allows?

The bank will charge a fee for each excess withdrawal, typically $25 to $35. If you repeatedly exceed the limit, the bank may close the account or convert it to a savings account. Some banks allow you to request a temporary increase in your withdrawal limit if you have a specific need, but this is not may provide.

Is a money market account safe?

Yes, if the bank is FDIC-insured and your balance is under $250,000. The FDIC guarantees your money even if the bank fails. If your balance exceeds $250,000, the amount over $250,000 is not insured. Money market accounts are safer than money market funds because they carry FDIC insurance.

Should I move my money to a money market account if interest rates are high?

Only if you do not need frequent access to the money and the bank's fees are low. Compare the interest rate minus fees to what you would earn in a high-yield savings account at the same bank or elsewhere. If the money market account pays more after fees, move it. If the savings account pays the same or more, stay there.

What if the bank lowers the interest rate after I open the account?

The bank can lower the rate anytime without asking your permission. You have no recourse except to move your money to another bank. This is why it is worth checking rates every few months and switching if another bank is paying significantly more. Moving money takes one to three business days.