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

When you open a CD account, you give a bank or credit union a lump sum of money—say $5,000—and agree not to touch it for a specific period. That period is called the term, and it typically ranges from three months to five years, though some institutions offer longer or shorter terms. In return for leaving your money untouched, the bank pays you a higher interest rate than it would on a regular savings account.

The interest rate on a CD is fixed, meaning it does not change during the term. If you open a one-year CD at 4.5 percent annual percentage yield (APY), you will earn 4.5 percent for the full year, regardless of whether interest rates rise or fall in the market. At the end of the term—called the maturity date—the bank returns your original deposit plus all the interest you earned. You can then withdraw the money, move it to another account, or roll it into a new CD.

The trade-off is access. If you need the money before the maturity date, most banks charge a early withdrawal penalty. This penalty varies by institution and by term length—a three-month CD might charge 10 days of interest, while a five-year CD might charge 150 days of interest. Some banks have no penalty CDs, but those typically offer lower rates. The penalty is deducted from your interest earnings or principal, so withdrawing early can mean you earn less than you would have by waiting.

Key Takeaways

  • You deposit a fixed amount of money and agree not to withdraw it until a specific maturity date in exchange for a may provide interest rate.
  • The interest rate is locked in and does not change, even if market rates move up or down during your term.
  • Withdrawing money before the maturity date triggers an early withdrawal penalty that reduces your earnings or principal.
  • CDs are insured by the FDIC (at banks) or NCUA (at credit unions) up to $250,000 per account, so your principal is protected even if the institution fails.
  • CD rates vary by term length, institution, and market conditions, so comparing offers before you open an account can significantly affect your earnings.

How interest accrues and compounds on a CD

Interest on a CD is usually compounded, meaning the bank calculates interest on your original deposit plus any interest already earned. The frequency of compounding—daily, monthly, quarterly, or annually—affects how much you ultimately earn. Daily compounding produces slightly more interest than annual compounding on the same rate, because interest is calculated and added to your balance more often.

The bank tells you the annual percentage yield (APY), which already accounts for compounding. So if a CD shows 4.5 percent APY, that is the actual return you will receive over one year, not a rate that needs adjustment. You do not have to do any math yourself—the bank handles it and deposits the full amount plus interest into your account at maturity.

Some CDs allow you to add money during the term (called add-on CDs), though this is less common. Most require you to deposit the full amount upfront. Interest begins accruing from the day you open the account, so timing your deposit can matter slightly if rates are changing, but the difference is usually small.

Early withdrawal penalties and what they cost you

The early withdrawal penalty is the main restriction on a CD. If you close the account before maturity, the bank deducts the penalty from your balance. On a $5,000 CD earning 4.5 percent APY over one year, you would earn roughly $225 in interest. If the penalty is 90 days of interest—about $56—and you withdraw after six months, you would receive your $5,000 principal plus $169 in interest (the $225 you earned minus the $56 penalty).

In some cases, the penalty can exceed the interest you have earned. If you withdraw a five-year CD after one year, the penalty might be 300 days of interest, which could be more than the interest you actually earned in that first year. You would then lose part of your principal. This is why understanding the penalty structure before you open the account matters.

A few banks now offer no-penalty CDs, which let you withdraw your money early without a fee. The trade-off is a lower interest rate—typically 0.5 to 1 percent lower than a standard CD with the same term. Whether a no-penalty CD makes sense depends on how confident you are that you will not need the money and how much the rate difference costs you over the term.

FDIC and NCUA insurance protection

CD accounts at banks are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per depositor, per institution. This means if the bank fails, the FDIC guarantees you will receive your principal and accrued interest up to that limit. CD accounts at credit unions are insured by the National Credit Union Administration (NCUA) under the same $250,000 limit.

The insurance covers the full balance—principal plus interest—so you do not lose money if the institution becomes insolvent. If you have more than $250,000 to deposit, you can spread it across multiple banks or credit unions to stay within the insurance limit on each one. Some people also open CDs in different ownership categories (such as individual, joint, or in trust) at the same institution, as each category is insured separately.

This insurance does not protect you from early withdrawal penalties or from market risk. It only protects you if the bank or credit union fails. If you withdraw early by choice, you still owe the penalty.

CD terms, rates, and how they compare across institutions

CD terms range from as short as one month to as long as ten years, though three months to five years are most common. Shorter terms typically offer lower rates because the bank has less certainty about future interest rate movements. Longer terms offer higher rates as compensation for locking your money away for a longer period. The relationship between term length and rate is called the yield curve, and it changes as market conditions shift.

Rates also vary significantly between institutions. A one-year CD at one bank might pay 4.5 percent APY while another pays 3.8 percent. Over a year on a $10,000 deposit, that 0.7 percent difference equals $70 in additional earnings. Shopping around before you open a CD is worth the time, especially for larger amounts or longer terms.

Online banks typically offer higher CD rates than brick-and-mortar banks because they have lower overhead costs. Credit unions sometimes offer competitive rates to members. You can compare current rates across institutions using financial websites or by calling banks directly. Rates change frequently, so a quote is only valid for a short window—usually a few days.

What happens when your CD matures

When your CD reaches its maturity date, the bank notifies you (usually by mail or email) and gives you a window—typically 7 to 10 days—to decide what to do with the money. You have three main options: withdraw the full amount, roll it into a new CD at the current rate, or move it to another account at the same bank or a different institution.

If you do nothing during the grace period, many banks automatically renew your CD into a new term at the current rate. This is convenient if you want to keep the money in a CD, but the new rate might be lower than what you had before. Some banks renew at a shorter term than your original CD (for example, a five-year CD renews as a one-year CD). Read the renewal terms in your account agreement so you know what will happen.

If you want to move the money elsewhere, you can request a check or electronic transfer. There is no penalty for withdrawing at maturity—the penalty only applies if you withdraw before the maturity date. This is your opportunity to compare rates at other institutions and move your money if you find a better offer.

CD ladders and how they can improve your flexibility

A CD ladder is a strategy where you open multiple CDs with different maturity dates. For example, you might open five one-year CDs, each with a $2,000 deposit, staggered so one matures every few months. As each CD matures, you can withdraw the money, roll it into a new longer-term CD, or move it elsewhere. This approach gives you regular access to portions of your money without early withdrawal penalties.

Laddering also helps you take advantage of rate changes. If rates rise, you can roll maturing CDs into new ones at the higher rate. If rates fall, you still have longer-term CDs earning the older, higher rate. You balance flexibility with the higher rates that longer terms typically offer.

The downside is that laddering requires more attention and multiple accounts. You have to track maturity dates and make decisions every few months. For people who want simplicity, a single CD might be easier, even if it is less flexible.

Frequently Asked Questions

Can I withdraw money from a CD before it matures?

Yes, but you will pay an early withdrawal penalty. The penalty amount depends on the term length and the bank's rules—it is typically measured in days of interest. The penalty is deducted from your balance, so you may earn less than if you had waited, or in some cases lose part of your principal.

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

A CD pays a higher interest rate in exchange for locking your money for a set term. A savings account lets you withdraw anytime without penalty but pays a lower rate. CDs are better if you have money you will not need for months or years. Savings accounts are better if you need access to your funds.

Are CDs safe if the bank fails?

Yes. The FDIC insures bank CDs up to $250,000 per depositor, and the NCUA insures credit union CDs the same way. If the institution fails, you receive your full balance including accrued interest up to the insurance limit.

What happens if I do not withdraw my money when the CD matures?

Most banks automatically renew your CD into a new term at the current rate. The renewal term and rate are set by the bank and may differ from your original CD. You have a grace period (usually 7 to 10 days) to withdraw or move the money before renewal takes effect.

Do I pay taxes on CD interest?

Yes. CD interest is taxable income in the year it is earned or credited to your account, depending on how the bank reports it. The bank will send you a 1099-INT form showing the interest you earned, which you report on your tax return. This is true even if you do not withdraw the money.