A money market account (MMA) is a type of bank account that earns interest while giving you limited check-writing and debit card access, essentially combining features of a savings account and a checking account. Your deposits are federally insured up to $250,000, just like a regular savings or checking account. Money market accounts are offered by banks and credit unions, and they’re a popular option for people who want to earn interest on their cash while keeping it accessible for occasional spending or bill payments.
How a Money Market Account Works
You deposit money, the bank pays you interest, and you can access your funds through checks, a debit card, ATM withdrawals, or electronic transfers. That flexibility is what sets a money market account apart from a standard savings account, which typically requires you to transfer money to checking before you can spend it.
Interest on a money market account compounds on a schedule set by your bank. Some banks compound daily, others monthly. The more frequently interest compounds, the slightly more you earn over time, especially at higher balances. The rate itself is variable, meaning it can go up or down at any time. Unlike a certificate of deposit (CD), where your rate is locked in for a set term, an MMA rate that looks attractive today could change next month.
The national average rate on money market accounts is 0.57%, according to FDIC data from April 2026. That average is dragged down by large traditional banks that pay very little. Competitive online banks and credit unions offer significantly higher rates, often in the 4% to 4.20% APY range, though those rates shift as the broader interest rate environment changes.
Tiered Rates and Minimum Balances
Many money market accounts use tiered interest rates, meaning the APY you earn depends on how much money you keep in the account. A bank might advertise a 4% APY, but that rate only kicks in on balances above $25,000. If your balance sits below that threshold, you might earn just 0.50%. The tiers vary widely by institution. Some require as little as $1,000 for the top rate, while others set the bar at $10,000 or $25,000.
Beyond rate tiers, some banks charge a monthly maintenance fee if your balance drops below a certain level. Others waive fees entirely. Before opening an account, check whether there’s a minimum deposit to open the account, a minimum balance to avoid fees, and a minimum balance to earn the advertised rate. These three numbers are often different.
Withdrawal and Transaction Limits
You can deposit money into a money market account as often as you want. Withdrawals are a different story. The Federal Reserve used to cap certain outgoing transactions (electronic transfers, phone transfers, automatic payments, and overdraft protection transfers) at six per month. That federal rule was suspended in April 2020, but many banks still enforce it or set their own limits, typically between six and ten transactions per month.
If you exceed your bank’s transaction limit, you may face excess withdrawal fees. In some cases, repeated violations can cause the bank to reclassify your account as a checking account, which usually means a lower interest rate. ATM withdrawals and in-person transactions at a branch generally don’t count toward these limits, though policies vary by institution.
This is the key tradeoff with a money market account: you get more access than a savings account, but less flexibility than a checking account. It works well for money you don’t need to touch frequently but want to reach quickly when you do.
Federal Insurance Protection
Money in a money market account at a bank is insured by the Federal Deposit Insurance Corp. (FDIC) up to $250,000 per depositor, per institution. If your account is at a credit union, the National Credit Union Administration (NCUA) provides the same $250,000 coverage through its Share Insurance Fund. Joint accounts get separate coverage, and retirement accounts like IRAs held in money market form are insured separately up to $250,000 as well.
This insurance covers your principal and any posted interest through the date of a bank or credit union closure. It does not cover investments like stocks, bonds, mutual funds, or cryptocurrencies, even if those products are sold through the same institution. This is an important distinction because money market accounts are sometimes confused with money market funds, which are mutual funds that invest in short-term debt. Money market funds are not FDIC or NCUA insured.
How It Differs From a Savings Account
The interest rates on competitive money market accounts and high-yield savings accounts are often nearly identical. The real difference is access. A money market account typically comes with checks and a debit card, so you can pay a bill or make a purchase directly from the account. With a high-yield savings account, you generally need to transfer money to a linked checking account first, which can take one to three business days.
That said, not every money market account offers check-writing or debit card access. Some MMAs are essentially savings accounts marketed under a different name, so it’s worth confirming what transaction tools come with a specific account before you open it. If you’re purely looking to park cash and earn interest without needing to spend from the account, a high-yield savings account with a competitive rate will do the same job with fewer balance requirements.
Who Benefits Most From a Money Market Account
A money market account fits well if you want your savings to earn a competitive rate but also need the ability to write an occasional check or use a debit card for a large, infrequent expense. Common uses include holding an emergency fund you might need to access quickly, storing a down payment you’re building toward, or keeping business operating reserves that occasionally need to cover a vendor payment.
If you make frequent daily transactions, a checking account is a better fit. If you never need direct spending access and just want the highest possible rate on idle cash, compare MMA rates against high-yield savings accounts and CDs. The best choice depends on how often you need to touch the money and whether you’re comfortable with a variable rate or prefer a locked-in return.
Fees to Watch For
The most common fees on money market accounts include monthly maintenance charges (often waivable by maintaining a minimum balance), excess withdrawal fees when you go over the transaction limit, transfer fees for moving money to external accounts, and early closure penalties if you close the account within a certain window after opening. Online banks tend to charge fewer fees than traditional brick-and-mortar institutions, though their minimum balance requirements for the best rates can still be substantial. Reading the fee schedule before you open the account takes five minutes and can save you from surprise charges.