A certificate of deposit is a savings account where you lock your money away for a set time in exchange for a higher interest rate

When you open a CD, you agree to leave a lump sum of money untouched until a specific date — called the maturity date. In return, the bank pays you a fixed interest rate, usually higher than what you'd earn in a regular savings account. At maturity, you get your original deposit back plus the interest earned. If you need the money before maturity, you pay an early withdrawal penalty, which is a fee that reduces your earnings or principal.

CDs are issued by banks and credit unions. The Federal Deposit Insurance Corporation (FDIC) insures CDs up to $250,000 per depositor per institution, the same way it protects regular savings accounts. This means if the bank fails, your money is protected up to that limit.

Key Takeaways

  • You deposit a fixed amount and agree not to touch it until the maturity date, which typically ranges from three months to five years.
  • The interest rate is locked in when you open the CD and does not change, even if market rates rise or fall.
  • Early withdrawal penalties vary by bank but typically equal three to six months of interest, though some banks charge a percentage of your deposit.
  • CDs are FDIC-insured up to $250,000, making them one of the safest places to keep money in a bank.
  • The longer the term, the higher the rate — a five-year CD pays more than a three-month CD, but your money is locked away longer.

How the interest rate and term length work together

Banks set CD rates based on how long you agree to lock your money away. A three-month CD might pay 4% annual interest, while a five-year CD from the same bank might pay 5%. The bank is willing to pay more because it gets to use your money for longer without you being able to withdraw it.

The interest rate is fixed, meaning it does not change for the life of the CD. If you buy a one-year CD at 4.5% and interest rates drop to 2% next month, you still earn 4.5%. If rates climb to 6%, you still earn 4.5%. This is the trade-off: you get certainty, but you also miss out if rates go up.

Interest compounds based on how often the bank calculates it — daily, monthly, or quarterly. More frequent compounding means slightly more money at maturity, though the difference is usually small on shorter terms.

What happens when your CD reaches maturity

On the maturity date, the CD stops earning interest. At that point, you have a window — usually 7 to 10 days — to decide what to do with the money. You can withdraw it, move it to another account, or roll it over into a new CD at whatever rate the bank is currently offering.

If you do nothing during that window, most banks automatically roll your CD into a new one at the current rate. This happens whether rates have gone up or down. Some banks notify you before the maturity date; others do not. If you want to avoid an automatic rollover, you need to contact the bank before the maturity date passes.

Early withdrawal penalties and when they apply

If you withdraw money before the maturity date, you pay a penalty. The amount varies widely by bank and by CD term. A three-month CD might have a penalty of one month's interest, while a five-year CD might have a penalty of six months' interest. Some banks instead charge a flat percentage of your deposit — for example, 1% of the amount withdrawn.

The penalty is deducted from your earnings or your principal. If you earned $200 in interest and the penalty is $150, you walk away with $50 of your interest. If the penalty exceeds your interest, it comes out of your original deposit, meaning you get back less than you put in.

A few banks offer no-penalty CDs, which let you withdraw your money early without a fee. These CDs pay lower interest rates than standard CDs because the bank has less certainty about how long it will hold your money.

Why banks offer CDs and who should consider them

Banks use CD deposits as a stable source of funding for loans and other operations. Because you agree not to touch the money, the bank can lend it out with confidence. In exchange, they pay you more than they would for a savings account where you could withdraw anytime.

CDs work best for money you know you will not need for a specific period — an emergency fund should stay in a regular savings account where you can access it instantly. CDs are useful for goals with a known timeline: saving for a down payment in two years, setting aside money for a car purchase in 18 months, or parking cash you want to keep safe but do not need right now.

CD laddering and managing multiple CDs

Some people buy several CDs with different maturity dates — a strategy called CD laddering. For example, you might buy five one-year CDs, each maturing in consecutive years. Each year, one CD matures and you can either withdraw the money or roll it into a new five-year CD. This approach gives you regular access to portions of your money while keeping the rest locked in at higher rates.

Laddering also protects you if rates rise. If you put all your money into a five-year CD and rates climb, you are stuck earning the old rate. With a ladder, you get new money maturing every year, giving you chances to reinvest at higher rates if they appear.

Comparing CDs across banks and understanding the fine print

CD rates and terms vary significantly between banks. A large national bank might offer 4% on a one-year CD, while an online bank offers 4.8% on the same term. The difference compounds over time, so shopping around matters. Online banks typically offer higher rates because they have lower overhead costs than brick-and-mortar branches.

Before you open a CD, check the bank's specific terms: How often is interest compounded? What exactly is the early withdrawal penalty? What happens at maturity — does it automatically roll over, and if so, at what rate? Does the bank require a minimum deposit? Some banks require $500 or $1,000 minimums; others accept $100. These details are in the CD's disclosure document, which you should read before committing your money.

Frequently Asked Questions

Can I add money to a CD after I open it?

No. A CD is a fixed deposit — you choose the amount when you open it, and that amount stays the same until maturity. If you want to save more, you open a separate CD or use a regular savings account. Some banks offer bump-up CDs that let you increase the rate once if market rates rise, but you cannot add to the principal.

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

A savings account has no maturity date and no penalty for withdrawals, but it pays lower interest. A CD locks your money for a set term and pays higher interest, but you lose money if you withdraw early. Choose a savings account for money you might need soon, and a CD for money you can afford to leave alone.

Do I pay taxes on CD interest?

Yes. CD interest is taxable income in the year it is earned, even if you do not withdraw it. The bank sends you a 1099-INT form at tax time showing how much interest you earned. If the CD is in a retirement account like an IRA, the interest may be tax-deferred or tax-free depending on the account type.

What happens if the bank fails while I own a CD?

The FDIC protects your CD up to $250,000. If the bank fails, the FDIC pays you your principal plus any interest earned up to the maturity date, even if the bank no longer exists. This protection applies as long as the bank is FDIC-insured, which you can verify on the FDIC website.

Is a CD a good investment if interest rates are expected to rise?

If rates are rising, a CD locks you into a lower rate for the entire term. You might do better keeping money in a high-yield savings account where the rate can adjust upward. However, if you want certainty and do not want to monitor rates, a CD removes that worry — you know exactly what you will earn.