Money market accounts do earn interest, but the rate changes with the market
A money market account earns interest on the money you deposit. The rate is not fixed — it moves up and down based on what the Federal Reserve does with its benchmark interest rate. When the Fed raises rates, your money market account rate typically rises within weeks or months. When the Fed cuts rates, your rate falls.
The interest you earn gets added to your account balance, usually monthly or quarterly depending on the bank. You can withdraw that interest anytime, or leave it there to earn interest on top of interest (called compounding). The catch is that money market accounts come with limits on how many withdrawals you can make per month — usually six — before the bank charges a fee or closes the account.
How much you actually earn depends on three things: the size of your balance, the rate your specific bank is offering right now, and how long your money sits in the account. A $10,000 balance earning 4.5% annually will generate about $450 in interest over a year. The same balance at 2% generates $200. The difference matters when you are comparing where to keep your emergency fund or short-term savings.
Key Takeaways
- Money market accounts earn interest that varies based on Federal Reserve rate changes, not a rate locked in when you open the account.
- Interest compounds monthly or quarterly at most banks, meaning you earn interest on your interest if you do not withdraw it.
- You can make up to six withdrawals per month before facing fees or account restrictions, which limits how often you can access your money.
- The actual dollars you earn depend on your balance size, your bank's current rate, and how long the money stays deposited.
- Money market accounts are FDIC-insured up to $250,000 per depositor per bank, so your principal is protected even if the bank fails.
How interest rates are set and when they change
Banks set their own money market account rates, but they all watch the Federal Funds Rate — the rate the Federal Reserve charges banks to borrow from each other overnight. When the Fed raises this rate, banks raise the rates they offer on savings products within days or weeks. When the Fed cuts, rates fall.
You will not see your rate change on a fixed schedule. Some banks update weekly, others monthly. A few update only when the Fed meets (eight times per year). Check your account terms or call your bank to learn when they review rates. If you are shopping for a new account, compare the current rate at multiple banks — the difference between 4.0% and 4.75% is real money on a large balance.
The Federal Reserve does not set a "best" rate for money market accounts. It sets the overnight lending rate, and banks decide how much of that benefit to pass on to you. This is why two banks might offer different rates even on the same day. Online banks often offer higher rates than brick-and-mortar banks because they have lower overhead costs.
What you actually earn: calculating interest on your balance
Banks calculate interest using one of two methods: simple interest or compound interest. Most money market accounts use compound interest, which means you earn interest on the interest you already earned.
Here is a concrete example. You deposit $5,000 in a money market account earning 4.5% annual interest. After one month, the bank adds about $18.75 to your account (one-twelfth of $225). The next month, you earn interest on $5,018.75, not just the original $5,000. Over a year, that compounding adds up to roughly $230 instead of $225.
The more often interest compounds, the more you earn. Daily compounding beats monthly compounding, which beats quarterly. Most online banks compound daily, which is why they often show slightly higher effective yields than banks that compound monthly. The difference is small on smaller balances but noticeable on $50,000 or more.
Withdrawal limits and how they affect your access to money
Federal rules allow you to make up to six withdrawals or transfers per month from a money market account before the bank can charge you a fee or close the account. This limit applies to phone calls, online transfers, and checks written against the account. It does not apply to ATM withdrawals or in-person withdrawals at a branch.
If you exceed six withdrawals in a month, your bank might charge a fee (typically $10 to $25 per excess withdrawal), or it might convert your account to a regular checking account with no interest. Some banks close the account outright. The rules are set by each bank, so read the disclosure document before you open an account if frequent access matters to you.
This limit is why money market accounts work best for money you do not need to touch often — an emergency fund you keep separate from your checking account, or savings for a goal six months away. If you need to move money in and out constantly, a regular savings account or checking account is a better fit, even if the interest rate is lower.
Money market accounts versus other savings options
A high-yield savings account earns the same interest rate as a money market account at most online banks, but with no withdrawal limits. You can move money in and out as often as you want. The trade-off is that you do not get a debit card or checkbook. If you want both frequent access and a debit card, you sacrifice some interest rate.
A certificate of deposit (CD) locks your money away for a set term — three months, one year, five years — and pays a higher rate in exchange. If you withdraw before the term ends, you pay a penalty. CDs make sense if you know you will not need the money for a specific period and want to lock in a rate before rates fall.
A regular savings account at a traditional bank earns much less interest — often 0.01% or lower — but offers unlimited withdrawals and no fees. It is useful for money you access frequently, not for money you are trying to grow.
| Account Type | Current Rate Range | Withdrawal Limits | Best For |
|---|---|---|---|
| Money Market Account | 4.0% to 5.0% | Six per month | Emergency funds, short-term savings |
| High-Yield Savings | 4.0% to 5.0% | Unlimited | Accessible savings with competitive rates |
| CD (1-year) | 4.5% to 5.5% | None (but penalty for early withdrawal) | Money you will not need for a set period |
| Regular Savings | 0.01% to 0.5% | Unlimited | Frequent access, minimal growth |
FDIC insurance protects your principal but not your interest earnings
Money market accounts at banks are FDIC-insured up to $250,000 per depositor per bank. This means if the bank fails, the government guarantees you will get your original deposit back, up to that limit. The interest you earned is also covered as part of your total balance.
If you have more than $250,000 to save, you can open accounts at multiple banks to stay within the insurance limit at each one. For example, $250,000 at Bank A and $250,000 at Bank B are both fully insured. Money market accounts at credit unions are insured by the NCUA (National Credit Union Administration) with the same $250,000 limit.
Money market accounts at investment firms (not banks) are not FDIC-insured. They are invested in short-term securities and carry more risk. For this guide, we are talking about bank money market accounts, which are the safer option for most people saving money.
How to find the best rate for your situation
Interest rates change constantly, so the "best" rate today might not be the best next month. Start by checking what your current bank offers. If it is significantly lower than online banks, moving your money takes about 15 minutes and costs nothing.
Use a rate comparison site to see what banks are offering right now. Bankrate, DepositAccounts, and NerdWallet all list current rates from multiple banks. Filter by the features that matter to you: whether you want a debit card, whether you need a physical branch, whether you want daily compounding.
When you find an account that fits, open it online. The bank will ask for your Social Security number, address, and initial deposit amount. Transfers from another bank take one to three business days. You do not need to close your old account immediately — you can move money gradually or keep both accounts open.
Frequently Asked Questions
Do I have to pay taxes on the interest I earn?
Yes. Interest from a money market account is taxable income. Your bank will send you a 1099-INT form at the end of the year showing how much interest you earned, and you report that on your tax return. The interest is taxed as ordinary income at your regular tax rate, not as a capital gain.
What happens if interest rates drop after I open my account?
Your rate will drop too, usually within a few weeks. Money market rates are not locked in — they float with the market. If rates fall significantly, you can move your money to a different bank offering a better rate. There is no penalty for closing a money market account.
Can I use a money market account as my main checking account?
Some money market accounts come with a debit card and checkbook, but most do not. Even if yours does, the six-withdrawal limit makes it impractical for frequent spending. Use a checking account for daily expenses and a money market account for savings you want to keep separate.
Is a money market account safer than keeping cash at home?
Yes. Your money is FDIC-insured up to $250,000, so you are protected if the bank fails. Cash at home is not insured against theft, fire, or loss. A money market account also earns interest, so your money grows instead of sitting idle.
What if my bank stops offering money market accounts?
Banks rarely eliminate money market accounts entirely, but they may stop accepting new customers or change the terms. If this happens to you, you can move your money to another bank. Your existing account will continue to earn interest under the old terms unless the bank notifies you of a change.