Short answer: A money market account (sometimes called a money market deposit account, or MMDA) is a bank or credit union deposit account that usually pays more interest than a basic savings account and may let you write a limited number of checks or use a debit card. Unlike a money market mutual fund, it is a deposit product—generally insured by the FDIC or NCUA up to applicable limits.
This guide explains how money market accounts work, how they differ from high-yield savings accounts and CDs, how deposit insurance applies, how interest is taxed in the US and UK, and when an MMA might (or might not) fit your cash plan.
This article is for general education only. It is not financial, tax or legal advice. Rules and rates change; confirm details with the institution and a qualified professional before you act.
What Is a Money Market Account?
According to the Consumer Financial Protection Bureau (CFPB), a money market account is a type of account offered by banks and credit unions. Like other deposit accounts, money market accounts are insured by the FDIC or NCUA, up to $250,000 held by the same owner or owners (subject to ownership-category rules explained below).
MMAs sit between everyday checking and longer-term savings:
- Interest: They tend to pay higher rates than ordinary savings or checking, though competitive high-yield savings accounts often pay as much or more.
- Access: Many MMAs allow limited check writing or debit-card use, plus ATM, in-person, mail or phone withdrawals. Banks may still set their own monthly transaction limits or fees.
- Minimums: Some MMAs require a higher opening deposit or ongoing balance than a basic savings account.
- Variable rates: The APY is usually not locked; the bank can change it.
The FDIC lists money market deposit accounts among insured deposit products, alongside checking, savings and certificates of deposit (CDs).
Money Market Account vs. Money Market Fund
The names sound alike, but they are different products:
- Money market account (deposit): Held at a bank or credit union. Generally FDIC- or NCUA-insured within limits. Your balance does not fluctuate with market prices the way a fund share price can.
- Money market mutual fund (investment): A mutual fund that invests in short-term debt securities. The SEC’s Investor.gov bulletin on money market funds stresses that money invested in a money market fund is not guaranteed by the FDIC, and you can lose money. Funds may offer check writing, but they are investments, not bank deposits.
If a brokerage holds cash for you, ask whether it is swept into a bank deposit (FDIC) or a money market fund (not FDIC). SIPC protection for brokerage failure is not the same as FDIC deposit insurance and does not cover investment losses.
How Money Market Accounts Work
APY and compounding
US banks disclose interest as an annual percentage yield (APY), which includes compounding. Use APY—not a raw interest rate—to compare accounts. Most MMAs compound interest daily or monthly and credit it periodically. Rates are typically variable.
What the FDIC national averages show
As of the FDIC’s National Rates and Rate Caps for September 21, 2026, the national average deposit rate was 0.63% for money market accounts and 0.37% for savings accounts. Those are industry averages across insured institutions—not the best available offers. Competitive online banks and credit unions often pay several times the national average; always compare current APYs yourself, because they change frequently.
Transaction limits and fees
In April 2020 the Federal Reserve removed the federal six-per-month limit on convenient savings withdrawals. Many banks still impose their own caps on checks, ACH transfers or debit purchases from savings-style accounts and may charge excess-transaction fees. Read the account agreement for:
- Minimum balance to open or to earn the advertised APY
- Monthly maintenance fees and how to waive them
- Limits on checks, debit transactions or electronic transfers
- Wire, overdraft or returned-item fees
Insurance: FDIC and NCUA
At an FDIC-insured bank, deposits in money market accounts are covered under the standard maximum of $250,000 per depositor, per insured bank, per ownership category. The FDIC’s Deposit Insurance at a Glance page lists MMDAs as covered deposit types. Credit union share accounts are similarly protected by the NCUA up to $250,000 under parallel rules.
Important: Opening both a savings account and an MMA at the same bank in the same ownership category does not double your coverage. All deposits in that category at that bank are added together. Use the FDIC’s Electronic Deposit Insurance Estimator (EDIE) if you hold large balances across accounts.
Money Market Account vs. HYSA vs. CD
| Feature | Money market account | High-yield savings | Certificate of deposit |
|---|---|---|---|
| Typical rate type | Variable APY | Variable APY | Usually fixed for a term |
| Check / debit access | Often limited checks or debit | Rarely checks; transfers common | Generally none until maturity |
| Early access cost | Usually free within bank limits | Usually free within bank limits | Often an early withdrawal penalty |
| Deposit insurance | FDIC / NCUA (if insured) | FDIC / NCUA (if insured) | FDIC / NCUA (if insured) |
| Best for | Cash you may need with occasional check access | Emergency fund and short-term goals | Money you can lock for a set term |
If you mainly want the highest liquid rate and do not need checks, a competitive high-yield savings account is often simpler. If you can leave money untouched for months or years, a certificate of deposit may lock a rate. For long-term growth beyond cash, beginners often look at diversified options such as an index fund—understanding that investments can lose value and are not FDIC-insured.
Who Might Use a Money Market Account?
- Emergency or near-term cash where you want insurance and some check-writing convenience
- Holding a down payment or tax reserve you expect to spend within a few years
- Parking cash after a sale or bonus while you decide on next steps (mind insurance limits)
An MMA is usually a poor fit for long-term retirement investing, speculative trading or money you need for unlimited daily spending (use checking for that).
Taxes on Money Market Account Interest (US)
Interest from a US bank or credit union MMA is generally taxable as ordinary income in the year it is credited. Banks typically issue Form 1099-INT when interest meets IRS reporting thresholds. State tax treatment varies. This is general information only—see IRS publications or a tax professional for your situation. Interest inside certain tax-advantaged accounts follows those accounts’ rules instead.
The UK Angle: Easy-Access Savings and FSCS
UK banks and building societies do not usually brand products as "money market accounts" the American way. The closest everyday equivalents are easy-access savings accounts (and some notice accounts) that pay variable interest with flexible withdrawals. Limited-check features are less common than in the US.
Eligible deposits at UK-authorised banks, building societies and credit unions are protected by the Financial Services Compensation Scheme. The FSCS deposit protection limit rose to £120,000 per eligible person, per authorised firm on 1 December 2025. Brands that share one banking licence count as a single firm for that limit. For tax on savings interest, see GOV.UK guidance on tax-free interest and the Personal Savings Allowance. The Financial Conduct Authority (FCA) regulates firms; always check a firm is authorised before you deposit.
How to Choose and Open a Money Market Account
- Confirm insurance: FDIC BankFind or NCUA lookup for US; FSCS / FCA register for UK.
- Compare APY and the balance tier that earns it—some rates apply only above a high minimum.
- Read fees and transaction limits in the truth-in-savings disclosure.
- Check access methods: mobile app, ACH, ATM network, checks, wires.
- Map ownership: single, joint or trust titles affect insurance; use EDIE for large totals.
- Fund the account and set up alerts so you notice rate or fee changes.
Common Mistakes to Avoid
- Confusing an MMA with a money market fund and assuming FDIC coverage
- Ignoring minimum-balance rules that cut your APY or trigger fees
- Exceeding bank-set transaction limits and paying excess fees
- Keeping more than the insured limit at one institution in one ownership category
- Chasing a teaser rate without reading how long it lasts
FAQ
Are money market accounts FDIC insured?
Yes, when held as deposits at an FDIC-insured bank (or as shares at an NCUA-insured credit union), money market deposit accounts are covered up to applicable limits—generally $250,000 per depositor, per institution, per ownership category. Money market mutual funds are not FDIC-insured.
Is a money market account better than a high-yield savings account?
Neither is automatically better. Compare APY, fees, minimums and access. HYSAs often win on rate alone; MMAs can win if you need limited check or debit access from the same account.
Can I lose money in a money market account?
Within FDIC/NCUA limits at an insured institution, your principal and accrued interest are protected if the institution fails. You can still lose purchasing power to inflation if rates are low, and you can lose money to fees. A money market fund can lose value.
How many withdrawals can I make?
There is no longer a federal six-withdrawal cap, but your bank or credit union may set its own limits and fees. Check your account terms.
Do money market accounts pay a fixed rate?
Usually no. Most MMA rates are variable. Fixed rates for a set term are more typical of CDs (or UK fixed-rate bonds).
Bottom Line
A money market account is an insured deposit account that can blend a savings-like rate with limited checking features. Use it for cash you want protected and reasonably accessible—not as a substitute for long-term investing. Compare current APYs with high-yield savings and CDs, verify FDIC/NCUA (or FSCS) coverage, and read the fee schedule before you open one.
