What a CD account is

A CD (certificate of deposit) is an account where you give a bank a sum of money for a fixed period of time—usually anywhere from three months to five years—and the bank pays you a set interest rate on that money. You agree not to touch it until the time is up. In exchange, the bank gives you a higher interest rate than you would get in a regular savings account.

The bank uses your money during that period. That is why they pay you more for it. You are essentially lending them money at a rate you both agree to before you open the account. When the time period ends—called the maturity date—the bank returns your original deposit plus all the interest you earned.

CDs are offered by banks and credit unions. The terms, interest rates, and minimum deposits vary widely between institutions. Some banks offer rates that change based on how long you lock your money away; longer terms usually pay more interest.

Key Takeaways

  • A CD locks your money away for a set time period in exchange for a may provide interest rate that is higher than a savings account.
  • Your money earns interest automatically, and you receive both your deposit and the interest when the CD reaches its maturity date.
  • If you withdraw money before the maturity date, the bank charges you a penalty, which usually means losing some or all of the interest you earned.
  • CDs are insured by the FDIC (at banks) or NCUA (at credit unions) up to $250,000, so your deposit is protected even if the institution fails.
  • You can open a CD with as little as $500 at some banks, though minimums vary and some institutions require $1,000 or more.

How interest works on a CD

When you open a CD, the bank tells you the annual percentage yield (APY)—the exact rate of interest you will earn over one year. This rate is locked in and does not change, even if the bank raises or lowers rates for new customers after you open your account.

Interest on a CD compounds, meaning you earn interest on your interest. If you have a $5,000 CD earning 4.5% APY for one year, you will earn roughly $225 in interest (the exact amount depends on how the bank calculates compounding—daily, monthly, or quarterly). At the end of the year, you get back $5,225.

The longer the CD term, the more time your money has to compound. A five-year CD earning the same rate would earn significantly more total interest than a one-year CD, though the annual rate stays the same. This is why longer-term CDs typically offer higher APY rates—the bank wants to keep your money longer, and you are giving up access to it for a longer time.

What happens when your CD matures

On your maturity date, the bank automatically returns your original deposit plus all earned interest to your account. You do not have to do anything. The money lands in whatever account you linked to the CD when you opened it, usually a checking or savings account at the same bank.

At that point, you have a choice: you can withdraw the money, move it to another account, or open a new CD. Many banks have an auto-renewal feature, which means if you do nothing, they will automatically roll your deposit and interest into a new CD with the same term at whatever the current rate is. Check your CD agreement to see if your bank does this, because the new rate may be lower than what you earned before.

If you want to avoid auto-renewal, you usually have a grace period—often five to ten days after maturity—to tell the bank you do not want to renew. After that window closes, the new CD begins.

Early withdrawal penalties and why they exist

If you need your money before the maturity date, you can withdraw it, but the bank will charge you a penalty. The penalty is usually a certain number of months' worth of interest. For example, a bank might charge a penalty of three months' interest if you withdraw early from a one-year CD.

The penalty can be large enough that you actually lose money. If you earned $100 in interest but the penalty is $150, you would get back your original deposit minus $50. This is why CDs are best for money you know you will not need during the term.

Banks charge penalties because they count on having your money for the full term. When you withdraw early, they lose the use of that money. The penalty compensates them for that loss and discourages people from treating CDs like regular savings accounts.

Some banks offer no-penalty CDs, which let you withdraw your money early without a penalty—though usually only once, and sometimes with a limit on how much you can withdraw. These CDs typically pay lower interest rates than standard CDs, because the bank is taking on more risk.

How CDs compare to savings accounts

The main difference is access to your money. In a savings account, you can withdraw whenever you want without penalty. In a CD, you commit to leaving the money alone. In exchange, the bank pays you more interest.

Right now, a high-yield savings account might pay 4.0% to 4.5% APY, while a one-year CD might pay 4.5% to 5.0%. A five-year CD might pay 4.75% to 5.25%. The exact rates change constantly and vary by bank. The longer you lock your money away, the higher the rate usually is.

CDs make sense if you have money you will not need for a specific period and want a may provide return. Savings accounts make sense if you need to keep money accessible for emergencies or unexpected expenses. Many people use both: they keep an emergency fund in a savings account and put longer-term savings into CDs.

FDIC insurance and what it protects

Money in a CD at a bank is insured by the FDIC (Federal Deposit Insurance Corporation) up to $250,000 per depositor, per bank. This means if the bank fails, the FDIC guarantees you will get your deposit and interest back, up to that limit.

At a credit union, the same protection comes from the NCUA (National Credit Union Administration), also up to $250,000. This insurance is automatic—you do not have to sign up for it or pay for it.

If you have more than $250,000 to invest, you can open CDs at multiple banks to keep each one under the insurance limit. Some people also open CDs in different ownership categories (like individual, joint, or in trust) at the same bank, and each category is insured separately up to $250,000.

When a CD makes sense for your money

A CD is useful when you have a specific goal and a specific timeline. If you know you will need money in two years for a down payment on a car, a two-year CD locks in a rate and keeps you from spending the money before you reach your goal.

CDs also make sense when interest rates are high. If rates are currently at 5% and you expect them to fall, locking in a five-year CD at 5% protects you from lower rates in the future. Conversely, if rates are low and expected to rise, a short-term CD (like three or six months) lets you reinvest at a higher rate when it matures.

CDs do not make sense if you might need the money before maturity, because the penalty can eat into your earnings. They also do not make sense if you are saving for an emergency fund—that money needs to stay liquid and accessible in a savings account.

Frequently Asked Questions

Can I withdraw money from a CD before it matures?

Yes, but you will pay an early withdrawal penalty set by the bank. The penalty is usually a certain number of months of interest. You can still withdraw your original deposit, but the penalty reduces or eliminates your earnings. Some banks offer no-penalty CDs that let you withdraw once without a fee, though these pay lower interest rates.

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

A savings account lets you withdraw money anytime without penalty, but pays lower interest. A CD locks your money for a set time and pays higher interest, but charges a penalty if you withdraw early. Both are FDIC-insured up to $250,000.

How much money do I need to open a CD?

Minimum deposits vary by bank and CD type. Some banks let you open a CD with $500, while others require $1,000, $2,500, or more. Online banks often have lower minimums than traditional banks. Check the specific bank's requirements before you open an account.

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

The FDIC (or NCUA at credit unions) insures your deposit and earned interest up to $250,000. You will receive your money back even if the bank closes. This protection is automatic and costs you nothing.

Do I have to renew my CD when it matures?

No. When your CD matures, you can withdraw the money, move it to another account, or open a new CD. Many banks auto-renew CDs unless you tell them not to within a grace period (usually five to ten days after maturity). Check your CD agreement to see if your bank does this.