Money market accounts and money market funds are not the same thing, and where you put your money changes what you own and what protections cover it

A money market account is a bank or credit union deposit account that pays interest tied to short-term rates. A money market fund is a mutual fund that buys short-term debt — Treasury bills, commercial paper, certificates of deposit from other banks. The account is FDIC-insured up to $250,000 per depositor per bank. The fund is not insured; it can lose value, though losses are rare. Most people choose the account for safety and the fund for slightly higher yield when they have larger sums.

The steps differ depending on which you choose. Both take minutes to open, but you need to know what you are buying before you start.

Key Takeaways

  • Money market accounts at banks are FDIC-insured and have no risk of loss, but money market funds are not insured and can decline in value, though this is uncommon.
  • Money market accounts require a minimum deposit that varies by bank, often $1,000 to $25,000, while many money market funds have minimums of $1,000 or less.
  • Interest rates on money market accounts change with the Federal Reserve's rate decisions, so your yield will rise and fall over time.
  • Money market funds charge an expense ratio — typically 0.2 to 0.5 percent per year — which reduces your return automatically.
  • You can open a money market account online in minutes, but moving money out may take three to five business days if you exceed withdrawal limits.

Opening a money market account at a bank or credit union

Start by comparing rates at banks and credit unions in your area. The Federal Reserve's rate changes affect all money market accounts, but banks set their own rates within that range. A bank offering 4.5 percent and one offering 4.0 percent are both responding to the same market — the difference is how much they are willing to pay to attract deposits. Check the current rates on sites like Bankrate or DepositAccounts, which update daily and let you filter by minimum deposit and account type.

Once you choose a bank, you will need your Social Security number, a government-issued ID, your address, and proof of income or employment (usually a recent pay stub or tax return). Some banks ask for these during signup; others ask later. Open the account online or in person — online is faster. You will be asked to link a checking account or provide a wire transfer so the bank can verify your identity and move your initial deposit. This verification takes one to three business days.

After the account is open, money you deposit is immediately available to earn interest at the rate posted that day. That rate will change when the Federal Reserve changes its benchmark rate, usually several times per year. Your bank will notify you of rate changes, but you are not locked in — you can move your money to a different bank if rates drop and you find a better offer elsewhere.

Buying a money market fund through a brokerage or mutual fund company

Money market funds are sold through brokerages (Fidelity, Schwab, Vanguard, E-Trade) and directly from mutual fund companies. You will need the same identification documents as for a bank account. Open a brokerage account first — this takes 10 to 15 minutes online — then link a bank account so you can transfer money in.

Once your account is funded, search the fund's name or ticker symbol in the brokerage's fund search tool. Common money market funds include Vanguard Federal Money Market Fund (VMFXX), Fidelity Government Money Market Fund (SPAXX), and Schwab Value Advantage Money Fund (SWVXX). The fund's prospectus — a document the fund company is required to provide — lists the expense ratio, the types of debt it holds, and the fund's average maturity (how long until the debt it owns comes due). Read the expense ratio first; it is the cost you pay annually, taken directly from your returns.

Place your order to buy shares of the fund. The order settles the next business day, and you will own shares at that day's closing price. The fund pays dividends (interest) monthly or daily, depending on the fund. Those dividends are automatically reinvested into more shares unless you choose to receive them as cash.

Understanding the trade-offs between accounts and funds

A money market account is safer because it is FDIC-insured. If the bank fails, your money up to $250,000 is protected by the federal government. A money market fund has no such protection. However, money market funds have never failed in the way a bank can fail — the worst that has happened is a small decline in share price during extreme market stress, and even that is rare.

Money market accounts usually pay less than money market funds because banks use deposits to make loans and keep some of the spread. Money market funds buy Treasury bills and other short-term debt directly, so they pass more of the yield to you — minus their expense ratio. If you have $100,000 to invest, a fund charging 0.2 percent per year costs you $200 in fees, but the higher yield often makes up for it. If you have $5,000, the account may pay you more after fees.

Withdrawal rules differ too. Money market accounts are technically savings accounts, so federal law limits you to six withdrawals per month (though most banks no longer enforce this). Money market funds have no withdrawal limit — you can sell shares anytime the market is open. However, the money takes one to three business days to reach your bank account. Money market accounts let you withdraw at an ATM or write checks (if the account includes a debit card or checkbook), so the money is available the same day.

Comparing rates and fees across providers

Rates change constantly, so do not rely on a rate you saw last week. Check the current rate the day you are ready to open the account. For money market accounts, use Bankrate, DepositAccounts, or NerdWallet to see rates at multiple banks side by side. These sites update daily and show the minimum deposit required and any promotional rates (which usually expire after three to six months).

For money market funds, log into the brokerage where you plan to open an account and search for "money market fund" or "stable value fund." The search results will show the fund's name, ticker, current yield (the annualized return based on recent dividends), and the expense ratio. Compare the yield minus the expense ratio across funds. A fund yielding 5.0 percent with a 0.5 percent expense ratio nets you 4.5 percent. One yielding 4.8 percent with a 0.1 percent expense ratio nets you 4.7 percent.

Do not chase the highest rate. A bank offering 5.2 percent when others offer 4.8 percent may be trying to attract deposits before raising fees or lowering rates later. Stick with banks and funds from established providers — the difference in rate is usually less than 0.5 percent, and stability matters more than chasing an extra 0.1 percent.

Setting up automatic deposits and monitoring your balance

Once your account or fund is open, set up automatic transfers from your checking account if you plan to add money regularly. Most banks and brokerages let you schedule weekly, biweekly, or monthly transfers. This removes the temptation to spend the money and builds your balance without effort.

Check your statement monthly to confirm the interest or dividends posted. Money market accounts show interest as a single deposit each month. Money market funds show dividends as additional shares purchased. Both should match the rate or yield you saw when you opened the account, adjusted for the actual balance you held that month.

If rates drop significantly — more than 0.5 percent below what you are earning — it may be worth moving your money. Closing a money market account takes one phone call and a few minutes. Selling a money market fund takes one click in your brokerage account. There is no penalty for moving, so do not feel locked in.

Frequently Asked Questions

Can I lose money in a money market account?

No. Money market accounts are FDIC-insured, so the bank guarantees your principal. The only risk is that interest rates fall and your yield drops, but the money itself is safe. Money market funds can decline slightly in value during extreme market stress, but this is extremely rare.

What is the minimum deposit to open a money market account?

It varies by bank. Some require $1,000, others $10,000 or $25,000. A few have no minimum. Check the bank's website or call to confirm before you start the application. If you have less than the minimum, look for a bank with a lower threshold or consider a regular savings account instead.

How often can I withdraw money from a money market account?

Federal law allows six withdrawals per month, though most banks no longer enforce this limit. However, large or frequent withdrawals may prompt the bank to close the account. Treat it as a savings vehicle, not a checking account. If you need to move money in and out constantly, use a checking account instead.

Do I pay taxes on money market interest?

Yes. Interest from a money market account and dividends from a money market fund are taxed as ordinary income at your marginal tax rate. The bank or fund will send you a 1099-INT form in January showing how much interest you earned. Report this on your tax return.

Should I choose a money market account or a money market fund?

Choose an account if you want safety, simplicity, and easy access to your money. Choose a fund if you have $25,000 or more and want the highest possible yield. For most people with under $50,000, the account is the better choice because FDIC insurance and no fees outweigh the slightly lower rate.