What a money market savings account actually does
A money market savings account holds your money and pays you interest on the balance. The interest rate moves up and down based on what the Federal Reserve does with its benchmark rate — when the Fed raises rates, your account's rate typically rises within weeks or months, and when the Fed cuts rates, yours falls. You can withdraw money, but the account limits how often you can move money out each month, and some withdrawals may take a few business days to reach you.
The account is FDIC insured up to $250,000 per depositor per bank, which means if the bank fails, the government covers your balance. The tradeoff for this safety and the higher interest rate (compared to a regular savings account) is that you cannot write checks from most money market accounts, and you cannot access the money when ready like you can from a checking account.
Key Takeaways
- Money market accounts earn interest that changes when the Federal Reserve adjusts its rates, so your earnings go up or down throughout the year.
- Federal law limits you to six transfers or withdrawals per month, though some banks enforce this more strictly than others.
- Your money is FDIC insured up to $250,000, so you do not lose your balance if the bank fails.
- Interest rates vary widely between banks, so moving your money to a bank offering a higher rate can meaningfully increase what you earn each year.
- Withdrawals by check or debit card usually clear the same day, but transfers to another bank typically take one to three business days.
How the interest rate on your account changes
The Federal Reserve sets a target range for the federal funds rate — the rate banks charge each other for overnight loans. When the Fed raises this rate, banks raise the rates they offer on savings accounts and money market accounts. When the Fed cuts the rate, banks typically cut yours within weeks. The lag exists because banks adjust their rates on their own schedule, not when ready.
Your specific rate depends on the bank you choose. A bank offering 4.50% APY (annual percentage yield) will earn you more than one offering 3.75% APY on the same $10,000 balance over a year. Online banks and credit unions often offer higher rates than brick-and-mortar banks because they have lower overhead costs. The rate you see advertised is the rate new deposits earn when ready — existing balances earn the same rate unless the bank changes it.
The interest compounds daily or monthly depending on the bank, meaning you earn interest on your interest. If you have $10,000 earning 4.50% APY with daily compounding, you earn roughly $450 over a year, but the exact amount depends on how many days are in each month and when the bank compounds.
The six-transaction limit and what counts
Federal Regulation D caps most savings accounts and money market accounts at six transfers or withdrawals per month. A transfer is moving money to another account (at your bank or elsewhere). A withdrawal is taking money out. Deposits do not count toward the limit — you can deposit as much as you want.
What counts varies slightly by bank. A check you write from the account counts as one withdrawal. An ACH transfer to your checking account counts as one transfer. A wire transfer counts as one. A debit card purchase counts as one withdrawal. An ATM withdrawal counts as one. If you exceed six in a month, the bank may charge a fee (usually $5 to $10 per excess transaction), close the account, or convert it to a checking account.
Some banks enforce this limit strictly; others are lenient if you go over once. If you need to move money in and out frequently, a money market account is not the right tool — a checking account or a high-yield savings account with no transaction limits would serve you better.
How long it takes to access your money
Withdrawals by check or debit card usually clear the same business day if you initiate them before the bank's cutoff time (often 2 p.m. or 5 p.m.). ACH transfers to another bank typically take one to three business days. Wire transfers usually arrive the same day if sent before the cutoff, but cost $15 to $30. ATM withdrawals are when ready if the bank has ATMs in its network, or may take a day or two if you use an out-of-network ATM.
The lag on ACH transfers exists because the banking system processes transfers in batches overnight. If you initiate a transfer on Friday evening, it may not arrive until Monday or Tuesday. If you need the money urgently, a wire transfer is faster but costs more. Some banks offer same-day ACH for an extra fee.
Comparing money market accounts to other savings options
| Account Type | Interest Rate | Withdrawal Limit | Check Writing | FDIC Insured |
|---|---|---|---|---|
| Money Market Savings | Varies by bank; moves with Fed rate | Six per month | Usually yes | Yes, up to $250,000 |
| High-Yield Savings | Varies by bank; moves with Fed rate | No limit | No | Yes, up to $250,000 |
| Regular Savings | 0.01% to 0.05% typically | Six per month | No | Yes, up to $250,000 |
| Checking Account | 0% to 0.05% typically | No limit | Yes | Yes, up to $250,000 |
A high-yield savings account earns nearly the same rate as a money market account but has no transaction limit, making it better if you move money frequently. A money market account's advantage is that you can write checks from it, which some people prefer for bill paying. A regular savings account at a traditional bank earns almost nothing and has the same transaction limit, so it is rarely the best choice. A checking account earns little to no interest but lets you access money freely.
What reduces your balance besides withdrawals
Interest is the only thing that increases your balance. Withdrawals, transfers, and fees reduce it. Monthly maintenance fees (usually $5 to $15) are charged by some banks if you do not maintain a minimum balance, though many online banks waive fees entirely. Overdraft fees do not explore to savings accounts because you cannot overdraw — the bank straightforward declines the transaction.
If your balance falls below a minimum (often $2,500 or $10,000), some banks lower your interest rate or charge a fee. Read the account agreement to see what minimums and fees explore. Moving to a bank with no minimums and no fees can save you $60 to $180 per year.
How to choose between banks offering different rates
The difference between a 4.50% APY and a 3.75% APY is real money. On a $50,000 balance, the higher rate earns you $375 more per year. On a $100,000 balance, it earns you $750 more. Online banks and credit unions typically offer the highest rates because they have lower costs. Traditional banks with physical branches usually offer lower rates because they spend more on real estate and staff.
Before opening an account, verify that the bank is FDIC insured (the FDIC website has a search tool). Check whether there are monthly fees, minimum balance requirements, or penalties for closing the account early. Compare the current APY across three to five banks. Rates change frequently, so the bank offering the highest rate today may not be the highest next month, but the difference is usually small enough that switching is not worth the effort unless you are moving a large balance.
Frequently Asked Questions
Can I lose money in a money market account?
No. Your balance cannot go down because of market performance — there is no market risk. Your balance can only decrease if you withdraw money, pay fees, or if the bank fails (though FDIC insurance protects you up to $250,000). The interest rate can fall, so your earnings may be lower, but your principal is safe.
What happens if I exceed the six-transaction limit?
The bank may charge a fee per excess transaction (usually $5 to $10), or it may convert your account to a checking account. Some banks are lenient if you go over once; others enforce it strictly. Check your account agreement or call the bank to learn its policy before you exceed the limit.
Is a money market account the same as a money market fund?
No. A money market account is a bank account insured by the FDIC. A money market fund is an investment that is not insured and can lose value. They are different products with different risks. This article covers accounts, not funds.
Should I move my money if another bank offers a higher rate?
If the rate difference is 0.5% or more and you have a balance of $25,000 or higher, moving makes sense. On $50,000, a 0.5% difference is $250 per year. On smaller balances, the benefit may not be worth the time to open a new account and transfer money. Check whether your current bank will match a competitor's rate before you switch.
How often does the interest rate change?
Banks change rates whenever they choose, but most adjust within a few weeks of a Federal Reserve rate change. During periods when the Fed is not changing rates, your rate may stay the same for months. You can check your bank's current rate on its website or call to ask what rate new deposits are earning.