Money market funds and money market accounts are different products, even though their names sound alike

A money market fund is a type of mutual fund. A money market account is a bank deposit account. The key difference: money market funds are not FDIC-insured, while money market accounts held at banks or credit unions are insured up to $250,000 per depositor. Money market funds invest your money in short-term debt securities like Treasury bills and commercial paper. Money market accounts hold your deposits and pay interest, just like a savings account, but often require a higher minimum balance and may limit how many withdrawals you can make per month.

If you arrived here from reading about money market accounts, you may have seen the term "money market fund" and wondered if it was the same thing. It is not. Understanding the difference matters because it affects how safe your money is, how much you can earn, and what happens if the financial institution fails.

Key Takeaways

  • Money market funds are mutual funds that invest in short-term debt; money market accounts are bank deposit accounts that hold your cash.
  • Money market accounts are FDIC-insured up to $250,000, while money market funds carry no government insurance and can lose value.
  • Money market funds may offer slightly higher yields than money market accounts, but they come with market risk.
  • Money market accounts typically have withdrawal limits and higher minimum balances than regular savings accounts.

How a money market fund invests your money

When you buy shares in a money market fund, your money is pooled with other investors' money and used to purchase short-term debt instruments. These include U.S. Treasury bills (which mature in less than one year), commercial paper issued by corporations, and certificates of deposit from banks. The fund manager buys and sells these securities constantly to maintain a stable share price, usually $1 per share.

Money market funds are designed to be low-risk compared to stock mutual funds, but they are not risk-free. If the securities the fund holds decline in value or default, the fund's share price can fall below $1. This is called "breaking the buck," and it is rare but has happened. The 2008 financial crisis saw several money market funds lose value when the institutions that issued their commercial paper failed.

How a money market account holds your deposits

A money market account works more like a hybrid between a checking account and a savings account. You deposit money directly into the account at a bank or credit union. The institution pays you interest on your balance. Your money sits in the bank's vault or is lent out by the bank to other customers—you are not buying securities yourself.

Because your money is a deposit at an FDIC-insured bank, it is protected up to $250,000 if the bank fails. The tradeoff is that money market accounts typically pay lower interest rates than money market funds. Many also require a minimum balance (often $2,500 to $10,000) and limit the number of withdrawals you can make per month, usually to six.

Interest rates and yield differences

Money market funds often pay higher yields than money market accounts because they invest in a wider range of securities and have lower operating costs than banks. When short-term interest rates rise, money market fund yields can climb quickly because the fund manager can reinvest maturing securities at the new, higher rates. Money market account rates also rise with interest rates, but banks may lag behind the market.

The yield difference is not always large. During periods when short-term rates are very low, money market funds and money market accounts may pay nearly the same rate. During periods when rates are higher, the gap widens. You can compare current rates by checking financial websites that track both products, though rates change frequently.

Which one carries more risk

Money market accounts carry almost no risk to your principal. Your deposits are insured by the FDIC, and the bank is required by law to hold capital reserves. The only real risk is inflation—if the interest rate paid is lower than inflation, you lose purchasing power over time, but you do not lose dollars.

Money market funds carry market risk. If the securities the fund holds decline in value, your shares can be worth less than you paid for them. This risk is small in normal times, but it exists. You also have no insurance protection if the fund company itself fails, though this is extremely rare because fund assets are held in custody by a separate institution.

Withdrawal rules and access

Money market accounts typically limit you to six withdrawals or transfers per month, though this rule has been relaxed at some banks in recent years. Check your account agreement. You can usually withdraw money in person at a branch, by ATM, or by electronic transfer, and the money reaches you within one to two business days.

Money market funds have no withdrawal limit, but selling your shares takes one to two business days to settle, and you may pay a transaction fee. If you need access to your money quickly and frequently, a money market account may be more convenient. If you rarely touch the money and want the highest yield, a money market fund may make sense—but only if you can tolerate the small risk of losing principal.

Tax treatment of earnings

Interest earned in a money market account is taxed as ordinary income at your federal and state tax rates. Interest earned in a money market fund is also taxed as ordinary income, unless the fund holds municipal bonds, in which case some or all of the interest may be tax-free at the federal level (and sometimes state level).

Most money market funds hold Treasury securities or corporate debt, so their earnings are fully taxable. If you hold either product in a tax-advantaged account like an IRA or 401(k), the tax treatment does not matter because the account itself is tax-deferred or tax-free.

When to choose each one

Choose a money market account if you want FDIC insurance, do not need to withdraw money often, and are comfortable with a lower interest rate in exchange for safety. Money market accounts work well for emergency funds or money you are saving for a specific goal in the next one to three years.

Choose a money market fund if you have a longer time horizon (three years or more), can tolerate small fluctuations in value, and want to maximize yield. Money market funds also make sense if you are already investing in other mutual funds or stocks through a brokerage account, because you can buy and sell them easily without opening a new account.

Frequently Asked Questions

Can a money market fund lose money?

Yes. If the securities the fund holds decline in value or the issuer defaults, the fund's share price can fall below $1. This is rare but possible. Money market accounts cannot lose money because deposits are FDIC-insured.

Do I need a brokerage account to buy a money market fund?

Usually yes. Most money market funds are sold through brokerages like Fidelity, Vanguard, or Charles Schwab. Some banks offer money market funds, but they are less common. Money market accounts are offered directly by banks and credit unions.

Which pays more interest, a money market fund or account?

Money market funds typically pay more, especially when short-term interest rates are rising. The difference varies depending on market conditions and the specific fund or account you choose. Compare current rates before deciding.

Are money market funds FDIC-insured?

No. Money market funds are not bank deposits, so they do not carry FDIC insurance. They are mutual funds, and your protection comes from the fund company's custody arrangements, not from government insurance.

Can I withdraw money from a money market fund anytime?

Yes, but it takes one to two business days for the sale to settle, and you may pay a transaction fee. Money market accounts allow withdrawals immediately at an ATM or branch, though many limit you to six per month.