A certificate of deposit is a savings account where you agree to leave money untouched for a set period in exchange for a higher interest rate

When you open a CD, you deposit a lump sum — say $5,000 or $10,000 — and the bank locks that money away for a fixed term, usually anywhere from three months to five years. In return, the bank pays you a higher interest rate than you would get in a regular savings account. You cannot withdraw the money before the term ends without paying a penalty, usually a loss of some or all of the interest you earned.

The trade-off is straightforward: you give up access to your cash for a defined period, and the bank rewards you with better interest. The longer you agree to lock your money away, the higher the rate typically climbs. A three-month CD might pay 4.5 percent, while a five-year CD might pay 5.2 percent — though these rates change constantly and vary by bank.

Key Takeaways

  • A CD requires you to deposit a fixed amount and leave it untouched until the maturity date, or you pay an early withdrawal penalty.
  • Interest rates on CDs are higher than regular savings accounts because the bank knows exactly how long it can use your money.
  • The term length you choose — three months, one year, five years — directly affects the interest rate you receive.
  • When your CD matures, you can withdraw the money, renew it for another term, or move it elsewhere without penalty.
  • CDs are insured by the FDIC up to $250,000 per depositor per bank, making them one of the safest places to keep savings.

How the interest rate and term length work together

Banks use CD terms to predict their cash flow. If you lock money in for five years, the bank can lend it out or invest it for five years with confidence. That certainty is worth paying you more interest. Conversely, a three-month CD ties up less of the bank's planning, so the rate is lower.

The interest rate you receive is set when you open the CD and does not change, even if market rates rise or fall during your term. If you buy a one-year CD at 4.8 percent and rates climb to 5.5 percent six months later, you still earn 4.8 percent. This is a real cost to you if rates go up, and a real benefit if rates fall.

Most banks compound interest daily or monthly, meaning you earn interest on your interest. The longer the term, the more compounding works in your favor. A $10,000 CD at 5 percent for five years will grow differently than the same amount at 5 percent for one year, even though the rate is identical.

What happens when your CD reaches its maturity date

On the maturity date, your CD stops earning interest and enters a grace period, usually seven to ten days. During this window, you can withdraw your money penalty-free, or you can let the bank automatically renew it for another term at the current rate.

If you do nothing, many banks will roll your CD into a new one automatically — often at a lower rate than you had before, since rates change over time. Read the fine print on your CD agreement to see your bank's renewal policy. Some banks send a notice before renewal; others do not.

The smartest move is to mark your maturity date on a calendar and decide in advance what you want to do. If rates have risen, you might shop around for a better rate at another bank. If rates have fallen, renewing at your current bank might be your best option. You are never locked in after maturity.

The early withdrawal penalty and when it applies

If you need your money before the maturity date, the bank will let you have it — but you will pay a penalty. The penalty is usually a certain number of months of interest. A CD with a three-month interest penalty means you lose three months' worth of the interest you earned. If you earned $100 in interest and the penalty is three months, you lose $25 and walk away with $75 in interest instead of $100.

Some banks calculate the penalty differently — as a percentage of the principal or a flat fee — so read your disclosure carefully. The penalty structure matters most on longer-term CDs, where the cost of early withdrawal can be substantial. A five-year CD with a one-year interest penalty is expensive to break early.

A few banks offer "no-penalty" CDs that let you withdraw without a penalty, but they pay lower interest rates to offset that flexibility. These are worth considering if you are unsure whether you will need the money, though the rate difference is usually significant.

FDIC insurance and how your money stays safe

CDs held at banks insured by the Federal Deposit Insurance Corporation (FDIC) are protected up to $250,000 per depositor per bank. This means if the bank fails, your CD and all accrued interest are covered up to that limit. You do not have to do anything to activate this protection — it is automatic.

If you have more than $250,000 to deposit, you can spread it across multiple banks to stay within the insurance limit at each one. Some people also use different ownership categories — a CD in your name alone, another in joint names with a spouse, another in a trust — to increase coverage, though the rules are complex. The FDIC website has a calculator to help you understand your coverage.

Credit unions offer a similar protection through the National Credit Union Administration (NCUA), also up to $250,000 per member per institution. Online banks and brick-and-mortar banks both carry FDIC insurance as long as they are members of the program.

CD ladders and how to manage multiple CDs

A CD ladder is a strategy where you buy several CDs with different maturity dates — one that matures in one year, one in two years, one in three years, and so on. As each CD matures, you can reinvest it or withdraw the money, giving you regular access to portions of your savings without the penalty of early withdrawal.

For example, if you have $10,000 to invest, you might buy four $2,500 CDs maturing in one, two, three, and four years. Every year, one CD matures and you can decide what to do with that $2,500. You get some of the higher interest rates that longer-term CDs offer, plus periodic access to your cash without penalties.

Laddering works best when rates are stable or rising. If rates are falling, you lock in higher rates on the longer-term CDs. If rates are rising, you get to reinvest maturing CDs at better rates more frequently. It is a middle ground between keeping all your money in short-term CDs (lower rates, more flexibility) and locking everything into a long-term CD (higher rates, no flexibility).

Where to find CDs and how rates compare

Banks, credit unions, and online financial institutions all offer CDs. Online banks typically pay higher rates than brick-and-mortar banks because they have lower overhead costs. The difference can be meaningful — an online bank might offer 5.3 percent on a one-year CD while a local bank offers 4.8 percent on the same term.

Shopping around takes time but pays off. Use a CD rate comparison tool or visit several banks' websites to see current rates for the term length you want. Rates change frequently, sometimes daily, so a rate you see today may not be available tomorrow. Once you decide on a bank and term, move quickly if the rate appeals to you.

Be aware that promotional rates sometimes apply only to new customers or to deposits above a certain amount. Read the fine print to confirm the rate you see is the one you will actually receive. Also check the early withdrawal penalty structure — a higher rate is less attractive if the penalty for early withdrawal is steep.

Frequently Asked Questions

Can I withdraw money from a CD before it matures?

Yes, but you will pay an early withdrawal penalty set by your bank. The penalty is usually a certain number of months of interest. For example, a three-month interest penalty means you lose three months' worth of the interest you earned. Some banks offer no-penalty CDs, though they pay lower rates.

What is the difference between a CD and a savings account?

A savings account lets you deposit and withdraw money anytime without penalty, but it pays a lower interest rate. A CD locks your money for a set term and pays higher interest, but you cannot touch it without a penalty. CDs are for money you know you will not need for several months or years.

Do I have to renew my CD when it matures?

No. When your CD matures, you can withdraw the money penalty-free, or you can let the bank renew it automatically for another term. Check your bank's renewal policy — some send a notice before renewing, others do not. You can also shop for a better rate at another bank if rates have risen.

Are CDs safe if the bank fails?

Yes. CDs at FDIC-insured banks are protected up to $250,000 per depositor per bank. If the bank fails, your CD and all accrued interest are covered. Credit unions offer the same protection through the NCUA. This protection is automatic — you do not need to do anything.

What happens if interest rates rise after I buy a CD?

Your CD rate stays the same for the entire term — it does not adjust upward. If rates rise, you earn less than you could have earned in a new CD. This is why some people use CD ladders, buying multiple CDs with different maturity dates so they can reinvest at higher rates as each one matures.