A certificate of deposit (CD) is a savings account where you lock money away for a fixed term (3 months to 5 years) in exchange for a fixed APY that's usually higher than a regular savings account — and stays fixed even if rates drop. It's FDIC-insured to $250,000. The trade-off is access: withdraw before the term ends and you pay an early withdrawal penalty, commonly 90–270 days of interest. CDs suit money you won't need for a set period. A CD ladder blends higher rates with regular access.
What a CD Is
A certificate of deposit is a type of savings account that holds a fixed amount of money for a fixed period — the term — in exchange for a fixed interest rate. In return for agreeing to leave your money untouched, the bank pays you a higher rate than it would on a regular savings account. When the term ends, the CD matures, and you get back your original deposit (the principal) plus all the interest it earned.
CDs are sometimes called "time deposits" because the defining feature is time: you're committing your money for a set window. They're offered by banks and credit unions (credit unions often call them "certificates" or "share certificates"), and they're federally insured up to $250,000 per depositor — by the FDIC at banks, the NCUA at credit unions — which makes them one of the safest places to keep money.
How a CD Works, Step by Step
The mechanics are simple:
- You choose a term and deposit your money. Terms commonly range from 3 months to 5 years. Generally, longer terms offer higher rates (though not always, depending on rate conditions).
- The bank pays a fixed APY for the whole term. Unlike a savings account's variable rate, your CD's rate is locked in when you fund it and won't change, no matter what happens in the economy. Interest typically compounds daily or monthly.
- You leave the money alone until maturity. This is the commitment. Most CDs don't allow additional deposits after opening.
- At maturity, you decide what to do. You can withdraw your principal plus interest, or roll it into a new CD. Banks usually give a grace period of about 10 days after maturity to make changes — otherwise many CDs auto-renew.
Because the rate is fixed and your deposit is insured, you know exactly how much you'll have at maturity the moment you open the CD. That predictability is the whole appeal.
The Early Withdrawal Penalty
The flip side of a guaranteed rate is limited access. If you need your money before the term ends, you'll almost always pay an early withdrawal penalty — calculated as a set number of days' or months' worth of interest.
Typical early withdrawal penalties
The exact penalty varies by bank and term, and federal law sets only a minimum (at least 7 days' interest if you withdraw in the first six days) — there's no federal maximum, so banks set their own. Penalties must be disclosed under the Truth in Savings Act, so always check before opening.
The penalty can eat into your principal. If you withdraw very early — before you've earned much interest — and the penalty is larger than the interest accrued, the bank takes the difference out of your original deposit. In other words, you can actually get back less than you put in. This is why CDs should only hold money you're genuinely confident you won't need during the term.
CD vs. Savings Account — Which to Choose
This is the core decision. Both are safe and FDIC-insured, but they serve different needs:
| Feature | CD | High-Yield Savings |
|---|---|---|
| Interest rate | Fixed, often higher | Variable, slightly lower |
| Access to money | Locked until maturity | Anytime |
| Early withdrawal | Penalty applies | No penalty |
| Add money later | Usually no | Yes, anytime |
| Rate if market drops | Stays locked (good) | Falls with market |
| Best for | Money with a timeline | Emergency fund, flexibility |
Choose a CD when you have money earmarked for a specific future date (next year's tuition, a wedding, a planned purchase) and want to lock in a guaranteed rate — especially valuable if you expect rates to fall. Choose a high-yield savings account when you need flexibility, are building an emergency fund, or want to keep adding money. Many people use both. For the full comparison of where to keep cash, see checking vs savings and best high-yield savings accounts.
Never put your emergency fund in a CD. An emergency fund's entire job is to be available instantly when something goes wrong — exactly when a CD's penalty would hit. Keep your emergency fund in a high-yield savings account. Use CDs only for money that has a known timeline and won't be your safety net.
Pros and Cons of CDs
✓ Guaranteed, fixed rate
You know your exact return upfront, and it's protected even if market rates fall during the term.
✓ Usually higher than savings
In exchange for the commitment, CDs typically pay more than a regular savings account.
✓ FDIC-insured & safe
Protected to $250,000 per depositor. Your principal can't lose value like a stock can.
✓ Discourages spending
The lock helps you resist dipping into savings earmarked for a goal.
! Money is locked up
Early withdrawal triggers a penalty of 90–270 days of interest, which can hit principal.
! Rate risk if rates rise
If rates climb after you lock in, you're stuck at the lower rate until maturity.
CD Types and the Ladder Strategy
Beyond the standard CD, you'll encounter a few variations: no-penalty CDs (let you withdraw early without a fee, but pay lower rates), jumbo CDs (require $25,000+ but may pay more), IRA CDs (inside a retirement account for tax advantages), and brokered CDs (bought through a brokerage, often without early withdrawal penalties since you sell them instead).
The most popular CD strategy is laddering — splitting your money across CDs with staggered maturity dates:
CD ladder example: $10,000 split five ways
Open five $2,000 CDs at 1, 2, 3, 4, and 5-year terms. Each year one matures — you can spend it or reinvest it into a new 5-year CD at the top of the ladder. You get higher long-term rates while keeping yearly access to a portion of your cash.
Laddering hedges interest-rate risk: if rates rise, your maturing CDs get reinvested at the new higher rates; if rates fall, you still have CDs locked in at the older, higher rates. It's a favorite of retirees needing periodic income and savers building toward medium-term goals — the best of both worlds between flexibility and yield.
How to Open a CD
Opening a CD is straightforward: compare APYs and terms across banks (online banks and credit unions often have the best rates), confirm it's FDIC- or NCUA-insured, check the early withdrawal penalty, then apply with your ID, Social Security number, and an opening deposit. Decide in advance what happens at maturity so you're not caught by auto-renewal. The process mirrors opening any account — see how to open a bank account online.
Frequently Asked Questions
What is a certificate of deposit (CD)?
A type of savings account where you agree to leave a fixed sum untouched for a set term in exchange for a fixed interest rate that's typically higher than a regular savings account. When the term ends, you get your deposit plus interest. CDs are federally insured to $250,000 (FDIC at banks, NCUA at credit unions), making them very safe. The trade-off is access — withdrawing early triggers a penalty. CDs work well for money you won't need for a specific period.
How does a CD work?
You deposit money for a set term (commonly 3 months to 5 years), and the bank pays a fixed APY that stays the same for the whole term regardless of the wider economy. Interest usually compounds daily or monthly. At maturity you withdraw your principal plus interest or roll it into a new CD, usually with a ~10-day grace period to decide. The defining feature is the commitment: you agree not to touch the money until maturity in exchange for a guaranteed, usually-higher rate.
What is the penalty for withdrawing from a CD early?
Typically a set number of days' or months' worth of interest — commonly 90 days on shorter CDs up to 180 or 270 days on longer ones. Federal law sets a minimum of at least 7 days' interest if you withdraw within the first six days, but there's no federal maximum, so banks set their own. If the penalty exceeds the interest you've earned, it can eat into your principal. Banks must disclose penalties under the Truth in Savings Act, so check before opening.
Is a CD better than a savings account?
It depends on your goal. A CD usually offers a higher, fixed rate but locks your money with a penalty for early access. A high-yield savings account has a slightly lower, variable rate but lets you withdraw anytime. Choose a CD for money you won't need for a set period and to lock in a rate (useful if rates might fall). Choose savings for flexibility, an emergency fund, or to add money over time. Many people use both.
What is a CD ladder?
A strategy that splits your money across CDs with different maturity dates for both higher rates and regular access. Instead of one 5-year CD, you might open five CDs with 1-to-5-year terms. Each year one matures, giving access to that money to spend or reinvest into a new long-term CD. Laddering hedges rate risk: if rates rise, maturing CDs reinvest higher; if rates fall, you still hold older higher-rate CDs. Popular with retirees and medium-term savers.
Sources & References
- Bank of America — What Is a CD (April 2026): fixed term and rate, FDIC $250k, early withdrawal penalty example 150 days
- The Motley Fool — CD Early Withdrawal Penalty (December 2025): 90–180 days of interest, penalty examples
- American Express — CD Early Withdrawal: 90 days short-term / 270 days long-term penalties
- HelpWithMyBank.gov (OCC) — CD Penalties: federal 7-day minimum, no maximum, Regulation DD
- NerdWallet — CD Early Withdrawal Penalty by Bank (May 2026): credit-union "share certificates"
- Chase / Capital One — CD disclosures: daily balance method, grace period ~10 days, auto-renewal, no additional deposits