A certificate of deposit locks your money away for a fixed period in exchange for a may provide interest rate

A certificate of deposit (CD) is a savings product where you give a bank or credit union a sum of money for a set length of time—usually three months to five years—and they pay you a fixed interest rate on it. You cannot withdraw the money before that time ends without paying a penalty. In return for that restriction, the interest rate is almost always higher than what you would earn in a regular savings account.

The bank uses your money during that period and pays you back the full amount plus interest when the term ends. The interest rate and the term length are both locked in when you open the CD, so you know exactly how much you will have at maturity, regardless of what happens to interest rates in the wider economy.

CDs are offered by banks, credit unions, and some online financial institutions. They are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per depositor per bank, or by the National Credit Union Administration (NCUA) for credit unions, so your principal is protected even if the institution fails.

Key Takeaways

  • You deposit a fixed amount of money for a fixed period (the term) and receive a may provide interest rate that does not change.
  • Withdrawing money before the term ends triggers an early withdrawal penalty, which is deducted from your interest or principal.
  • The longer the term, the higher the interest rate is usually offered, because the bank has use of your money for longer.
  • When the CD matures, you receive your original deposit plus all accrued interest, and you can then decide whether to open a new CD or move the money elsewhere.
  • CDs are insured up to $250,000 by the FDIC (banks) or NCUA (credit unions), protecting your principal from institutional failure.

How the interest rate and term work together

When you open a CD, you choose both the amount you deposit and the length of the term. Common terms are three months, six months, one year, two years, three years, and five years, though some institutions offer longer or shorter options. The interest rate the bank offers depends partly on the term: a one-year CD typically pays less than a five-year CD because the bank has use of your money for a shorter time.

Interest rates on CDs also move with the broader economy. When the Federal Reserve raises its benchmark interest rate, banks typically raise CD rates too. When rates fall, so do CD rates. The rate you lock in on the day you open the CD is the rate you keep for the entire term, even if rates rise or fall later.

Interest can be paid to you monthly, quarterly, or at maturity, depending on the CD. Some CDs allow you to withdraw interest as it accrues without penalty, while others require you to leave it in the CD to compound. Read the terms carefully, because this affects how much you actually earn.

What happens if you need the money before maturity

The main trade-off of a CD is that your money is not easily accessible. If you withdraw before the term ends, you pay an early withdrawal penalty. This penalty is typically a certain number of months' worth of interest—for example, three months of interest on a one-year CD. Some institutions charge a flat dollar amount instead.

The penalty is deducted from your CD balance, so it can eat into your principal if the penalty is large and you have not earned much interest yet. For example, if you open a one-year CD with a three-month interest penalty and withdraw after two months, you lose three months of interest even though you only earned two months' worth. This means you end up with less than you started with.

Some banks offer no-penalty CDs, which allow you to withdraw your money early without a penalty, though the interest rate is usually lower than a standard CD. These are useful if you think you might need the money but want a higher rate than a savings account offers. Read the fine print to understand exactly when you can withdraw without penalty.

When your CD reaches maturity

When the term ends, your CD matures. The bank deposits your original amount plus all accrued interest into your account, usually a linked checking or savings account. You now have access to the full balance with no penalty.

Most banks give you a window—usually seven to ten days—to decide what to do next. During this window, you can let the CD automatically renew into a new CD at the current interest rate, withdraw the money, or move it elsewhere. If you do nothing, many banks automatically renew the CD into a new term at the same length, though the interest rate will be whatever the bank is currently offering, not the old rate.

Pay attention to maturity dates so you do not miss the window to act. If you want to move the money or open a CD elsewhere, you need to contact your bank before the auto-renewal happens. Some banks send notices before maturity, but it is your responsibility to track the date.

How much you actually earn: calculating CD returns

The amount you earn depends on three things: the principal (how much you deposit), the interest rate, and the term length. Banks disclose the annual percentage yield (APY), which accounts for how often interest compounds and shows you the true annual return.

For example, a $10,000 CD at 4.5% APY for one year earns $450 in interest, giving you $10,450 at maturity. A $10,000 CD at 4.5% APY for five years earns roughly $2,460 in total interest (because interest compounds), giving you $12,460 at maturity. The longer the term, the more interest compounds, so the total return is higher even at the same rate.

Compare APY across institutions before opening a CD, because rates vary. An online bank might offer 4.75% APY while a local bank offers 4.0% APY for the same term. Over five years, that 0.75% difference adds up significantly on a large deposit.

CDs versus other savings options

A regular savings account is more flexible—you can withdraw money anytime without penalty—but the interest rate is much lower, often below 0.5% APY. A money market account sits between the two: it pays more than savings but less than a CD, and you can usually write checks or make a limited number of withdrawals per month.

A CD makes sense if you have money you will not need for a set period and want the highest rate available for that time frame. It does not make sense if you might need the money soon, because the early withdrawal penalty will likely cost you more than you earned in interest.

Treasury bills and bonds are another option if you want a may provide return. They are issued by the federal government and are extremely safe, but the rates are often lower than CDs, and they work differently—you buy them at a discount and receive the full face value at maturity rather than earning interest payments.

Tax treatment of CD interest

Interest earned on a CD is taxable income in the year it is earned, even if you do not withdraw it. If your CD pays interest monthly or quarterly, you owe taxes on that interest each year, not just when the CD matures. The bank will send you a 1099-INT form at the end of the year showing how much interest you earned.

If you withdraw early and pay a penalty, you cannot deduct the penalty from your taxes. The interest is still taxable, and the penalty is straightforward a cost you bear.

Some people open CDs in tax-advantaged retirement accounts like IRAs to defer taxes on the interest, but the same early withdrawal rules explore—if you withdraw before age 59½ from a traditional IRA, you pay a 10% penalty plus income tax on the amount withdrawn, in addition to any CD early withdrawal penalty.

Frequently Asked Questions

Can I add more 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. If you want to deposit more money, you must open a separate CD. Some banks allow you to open multiple CDs at once if you want to spread your money across different terms or amounts.

What if interest rates rise after I open my CD?

Your rate stays locked in for the entire term. If rates rise, you will earn less than you could have earned in a new CD opened at the higher rate. This is the trade-off for the certainty of a fixed rate. When your CD matures, you can open a new one at the current (higher) rate if you choose.

Is a CD safe if the bank fails?

Yes. CDs held at FDIC-insured banks are protected up to $250,000 per depositor per bank. If the bank fails, the FDIC takes over and pays you your full balance plus accrued interest up to the limit. Credit union CDs are insured the same way by the NCUA. If you have more than $250,000, spread it across multiple banks to stay within the insurance limit.

What is a CD ladder, and why would I use one?

A CD ladder is when you open multiple CDs with different maturity dates—for example, one-year, two-year, three-year, and five-year CDs all at once. As each one matures, you can reinvest it in a new five-year CD, so you always have money maturing soon while still earning higher rates on longer terms. This balances access to your money with higher returns.

Can I move a CD to another bank before it matures?

You can withdraw the money and move it, but you will pay the early withdrawal penalty. You cannot transfer the CD itself to another bank—you must close it, pay the penalty, and open a new CD elsewhere. The penalty usually makes this not worth doing unless rates have risen dramatically.