How Each Account Works
A Certificate of Deposit (CD) is a time-deposit account. You agree to leave a set amount of money with a bank or credit union for a defined term — commonly ranging from three months to five years. In return, the institution pays you a fixed interest rate. Withdraw early, and you typically face an early-withdrawal penalty, often equal to several months of interest.
A Money Market Account (MMA) is a deposit account that blends features of a savings account and a checking account. It generally pays a higher rate than a standard savings account, and many MMAs include limited check-writing privileges or a debit card. Historically, federal rules capped MMA withdrawals at six per month, though those specific limits were lifted in 2020 — individual banks may still apply their own restrictions, so it is worth checking the account terms.
Both are considered savings vehicles, not investments. For a broader look at where saving ends and investing begins, see this guide to saving vs. investing.
| Criterion | Certificate of Deposit (CD) | Money Market Account (MMA) |
|---|---|---|
| Access to funds | Locked until maturity; penalties for early withdrawal | Generally accessible; some transaction limits may apply |
| Interest rate type | Fixed for the term | Variable, can change over time |
| Typical rate level | Often higher, especially for longer terms | Above standard savings; may be lower than CDs |
| Minimum deposit | Varies; often $500–$1,000+ | Varies; often $1,000–$2,500+ |
| Check-writing or debit access | No | Often yes, with limits |
| Federal deposit insurance | Yes (FDIC/NCUA up to $250,000) | Yes (FDIC/NCUA up to $250,000) |
| Best for | Fixed-date savings goals | Liquid reserves and accessible savings |
Rates, Risk, and Federal Insurance
CD rates are generally fixed for the entire term. That means if rates rise after you open a CD, you are locked into the original rate — though some institutions offer bump-up or step-up CDs that allow one rate adjustment. The trade-off is predictability: you know exactly what you will earn at maturity.
MMA rates are typically variable. They can rise when the broader interest rate environment shifts upward, but they can also fall. This makes MMAs more responsive to market conditions — helpful when rates climb, less so when they drop.
$250,000
Federal deposit insurance limit per depositor
The FDIC and NCUA each insure deposits up to this amount per depositor, per ownership category, at member institutions.
3 mo–5 yrs
Common CD term range
Most banks and credit unions offer CD terms ranging from three months to five years, with longer terms often carrying higher rates.
Critically, both account types are generally insured. Accounts at FDIC-member banks are insured up to $250,000 per depositor, per ownership category. Credit union equivalents are covered by the NCUA under the same limits. Neither account exposes you to market risk the way stocks or bonds do — your principal is protected up to those limits.
If you are comparing these options to other savings products, the comparison of high-yield and traditional savings accounts covers another tier worth understanding.
Matching the Right Account to Your Goal
The single most important factor in choosing between a CD and a money market account is when you will need the money. This concept — structuring savings around time horizons — is foundational to smart saving. Our article on short-term vs. long-term savings goals explores this framework in depth.
Use a CD when:
- You have a specific future date in mind (a home purchase, tuition payment, or planned expense).
- You want to remove the temptation to spend by locking funds away.
- You are confident you will not need the money before the CD matures.
Use a money market account when:
- The funds serve as an emergency reserve or operating buffer.
- You want flexibility to add to or withdraw from the account periodically.
- You prefer variable-rate exposure if you expect rates to rise.
Some households use both — keeping an MMA as a liquid reserve while laddering CDs for medium-term goals. Laddering means opening several CDs with staggered maturity dates so that a portion becomes accessible at regular intervals, reducing the all-or-nothing trade-off of a single CD. For thoughts on organizing multiple accounts, see the pros and cons of keeping all your savings in one place.
This article is for general informational purposes only and does not constitute personalized financial advice. Consult a licensed financial professional for guidance tailored to your specific situation.
