The basic mechanics: how your money sits and earns

A money market savings account holds your cash and pays you interest on the balance. The bank uses your money to make loans and investments, and shares a portion of what it earns back to you as interest. The rate you earn changes—sometimes weekly, sometimes daily—based on what the Federal Reserve does with its benchmark interest rate and what other banks are offering.

Your money stays in the account until you withdraw it. You can see the balance anytime through online banking or a mobile app. The interest compounds, meaning you earn interest on the interest you've already earned, though the frequency of compounding (daily, monthly, quarterly) depends on the bank's terms.

Money market accounts are FDIC insured up to $250,000 per depositor per bank, the same protection that covers regular savings accounts. If the bank fails, the government guarantees your money up to that limit.

Key Takeaways

  • Interest rates on money market accounts move with Federal Reserve decisions and market conditions, so your rate can go up or down after you open the account.
  • You can withdraw money, but most banks limit you to six withdrawals per month before charging a fee or closing the account.
  • The account earns more interest than a regular savings account because the bank expects you to keep the money there longer and make fewer transactions.
  • Your deposits are insured by the FDIC up to $250,000, so your principal is protected even if the bank fails.
  • Interest compounds at intervals set by the bank—usually daily or monthly—so money you earn starts earning interest too.

How interest rates are set and when they change

Banks set their money market rates based on the federal funds rate, which is the interest rate the Federal Reserve charges banks to lend to each other overnight. When the Fed raises its rate, banks typically raise the rates they offer on savings products within days or weeks. When the Fed cuts its rate, banks usually cut their rates too, though sometimes more slowly.

The exact rate your bank offers also depends on how much competition exists in your area and online. Banks offering rates significantly higher than competitors are usually trying to attract deposits quickly. A rate that looks unusually high compared to what other banks advertise may drop after a promotional period ends.

Your rate is locked in only at the moment you open the account. After that, the bank can change it at any time, though they must notify you before the change takes effect. Some banks change rates weekly; others change them monthly or quarterly. You can check your current rate in your account details or by calling the bank.

Withdrawal limits and how they affect your money

Most banks allow you to withdraw money from a money market account, but they limit how many times you can do it. The standard limit is six withdrawals per month, though some banks allow more and some allow fewer. This limit exists because money market accounts are designed for money you plan to keep there, not for frequent spending.

Withdrawals can happen through several methods: online transfer to another bank account, ATM withdrawal if the bank provides an ATM card, check writing if the account comes with checks, or in-person withdrawal at a branch. Each method counts toward your monthly limit. Some banks count only certain types of withdrawals—for example, online transfers might count but ATM withdrawals might not—so check your account agreement.

If you exceed the withdrawal limit, the bank may charge a fee (typically $10 to $25 per excess withdrawal) or close the account. Some banks straightforward enforce the limit without penalty. Before opening an account, ask what happens if you go over the limit, because the rules vary.

How deposits work and when money becomes available

You can deposit money into a money market account by electronic transfer from another bank account, direct deposit from an employer, check deposit through mobile banking or ATM, or in-person at a branch. The deposit method affects how long it takes for the money to be available for withdrawal.

Electronic transfers from another bank typically take one to three business days to clear. Direct deposit usually arrives on the scheduled payday. Mobile check deposits typically clear within one to two business days. In-person deposits at a branch are usually available when ready, though the bank may hold the funds for a few days before they're fully cleared.

Interest starts accruing on the money as soon as it's deposited, even if it hasn't fully cleared yet. This means you earn interest during the waiting period, though the bank won't pay it out until the next interest payment date.

Comparing money market accounts to other savings products

Money market accounts typically pay more interest than regular savings accounts because they come with withdrawal restrictions. A regular savings account usually has no limit on how many times you can withdraw, so banks pay less interest to compensate for the higher cost of managing frequent transactions. The difference in rate can be 0.5% to 1.5% annually, depending on current market conditions.

Certificates of deposit (CDs) usually pay even more than money market accounts because you agree to leave your money untouched for a set period—three months, six months, one year, or longer. If you withdraw early, you pay a penalty. Money market accounts give you access to your money without penalty, so they pay less.

Money market accounts also differ from money market funds, which are investment products sold by brokerages and mutual fund companies. Money market funds are not FDIC insured and carry a small risk of loss, though that risk is very low. Banks' money market savings accounts are insured and carry no investment risk.

What happens to your interest when rates drop

When the Federal Reserve cuts interest rates, banks cut the rates they pay on savings accounts within days or weeks. Your money market rate will fall along with the market. If you were earning 4.5% and rates drop, your bank might lower your rate to 3.75% or lower. The bank will notify you before the change takes effect, usually by email or through your online account.

Your principal—the money you deposited—never changes. Only the interest rate changes. If you have $10,000 in the account and the rate drops from 4.5% to 3.75%, you still have $10,000, but you'll earn less interest going forward. The interest you've already earned stays in the account and continues to compound.

If rates drop and you're unhappy with the new rate, you can move your money to another bank offering a higher rate. There's no penalty for closing a money market account, though you should confirm the new bank's rate is locked in before you transfer.

How compounding works and when you see the money

Interest compounds when the bank adds earned interest to your account balance, and then calculates the next interest payment on the larger balance. If your account compounds daily, the bank calculates interest every day and adds it to your balance. If it compounds monthly, the bank does this once a month. Daily compounding means you earn slightly more over time because you're earning interest on interest more frequently.

The bank pays out the interest on a schedule set in your account agreement—usually monthly or quarterly. On that date, the accumulated interest is added to your balance. You don't receive a check or separate deposit; the interest straightforward increases your account balance. You can then withdraw it, leave it to compound further, or transfer it elsewhere.

Over a year, compounding makes a measurable difference. On a $10,000 balance at 4.5% annual interest, daily compounding earns about $460 in the first year, while monthly compounding earns about $458. The difference grows larger the longer the money stays in the account.

Frequently Asked Questions

Can I use a money market account like a checking account?

Some money market accounts come with a debit card or checkbook, but the six-withdrawal limit per month still applies. If you need to make more than six transactions monthly, a checking account is a better choice. Money market accounts are designed for money you plan to keep there, not for everyday spending.

What happens if I withdraw money before a certain time period?

Money market savings accounts have no early withdrawal penalty. You can withdraw your money anytime without losing interest or paying a fee, as long as you stay within the six-withdrawal monthly limit. This is different from CDs, which charge a penalty for early withdrawal.

Do I pay taxes on the interest I earn?

Yes. The interest you earn on a money market account is taxable income. The bank will send you a 1099-INT form at the end of the year showing how much interest you earned, and you'll report that amount on your tax return. The interest is taxed as ordinary income at your regular tax rate.

Is my money safe if the bank goes out of business?

Yes, up to $250,000 per depositor per bank. The FDIC (Federal Deposit Insurance Corporation) guarantees your deposits. If the bank fails, the FDIC pays you back in full, up to the limit. If you have more than $250,000, only that amount is protected at each bank.

Can the bank change my interest rate whenever it wants?

Yes, the bank can change your rate at any time after you open the account. They must notify you before the change takes effect, usually by email or through your online account. If you disagree with the new rate, you can close the account and move your money to another bank without penalty.