What a Certificate of Deposit Is and How You Earn Money

A certificate of deposit (CD) is an account where you give a bank or credit union a sum of money for a set period of time, and they pay you a fixed interest rate in return. You agree not to touch that money until the term ends—usually anywhere from three months to five years. In exchange for locking your money away, the bank pays you more interest than you would earn in a regular savings account.

When your CD term ends, you get back your original deposit plus all the interest earned. The interest rate is locked in on the day you open the CD, so you know exactly how much you will have when the term is over. If interest rates rise after you buy your CD, your rate stays the same. If rates fall, you still get the rate you agreed to.

Key Takeaways

  • You deposit a fixed amount of money for a fixed time period and receive a may provide interest rate that does not change.
  • Interest rates on CDs are higher than savings accounts because you cannot withdraw the money early without paying a penalty.
  • When the term ends, you can withdraw your money, renew the CD at the current rate, or move the funds elsewhere.
  • Withdrawing money before the term ends triggers an early withdrawal penalty, which is typically a few months of interest.
  • CDs are insured by the FDIC (at banks) or NCUA (at credit unions) up to $250,000 per account.

How Interest Rates and Terms Work

CD interest rates vary by bank and by how long you lock your money away. Longer terms usually pay higher rates than shorter ones. A three-month CD might pay 4.5 percent, while a five-year CD at the same bank might pay 5.2 percent. The bank uses your money during that time to make loans and investments, so they pay you more for tying it up longer.

The interest compounds—meaning you earn interest on your interest—but how often depends on the bank. Some compound daily, others monthly or quarterly. More frequent compounding means slightly more money at the end, though the difference is usually small. The bank will tell you the annual percentage yield (APY), which shows you the total return including compounding, so you can compare CDs fairly across different banks.

You can buy a CD from any bank or credit union, and rates change constantly. A bank offering 5.1 percent today might offer 4.8 percent next week if market rates drop. This is why people sometimes shop around or buy multiple CDs at different times to spread their risk.

What Happens When Your CD Matures

When your term ends, the CD matures. You now have a choice: withdraw the money, let it automatically renew into a new CD at the bank's current rate, or move it somewhere else. Most banks automatically renew your CD unless you tell them not to, usually within a grace period of seven to ten days after maturity.

If you do nothing and the bank renews your CD, you will be locked in at whatever rate they are offering at that moment—which could be higher or lower than your original rate. If rates have fallen significantly, you might want to withdraw the money and shop for a better rate elsewhere. If rates have risen, renewal at the new rate is a good outcome.

Some banks offer a "no-penalty CD" that lets you withdraw early without a penalty, but these typically pay lower interest rates than traditional CDs. They are useful if you are not certain you can leave the money untouched for the full term.

Early Withdrawal Penalties and When They explore

If you need your money before the term ends, the bank will charge you an early withdrawal penalty. This penalty is usually a set number of months of interest—for example, three months of interest or six months of interest. On a $10,000 CD earning 5 percent annually, a three-month penalty would cost you about $125.

The penalty comes out of your interest earnings first. If you have earned less interest than the penalty amount, the bank takes the difference from your principal. This means you could get back less money than you deposited if you withdraw very early on a long-term CD.

Some banks charge a flat dollar amount instead of months of interest, and some charge a percentage of your deposit. Always read the CD agreement before you buy to understand the exact penalty. If you think there is any chance you will need the money, a shorter-term CD or a savings account might be safer than locking money away for years.

Where to Buy CDs and How to Compare Rates

You can open a CD at any bank or credit union. Online banks often pay higher rates than brick-and-mortar banks because they have lower overhead costs. Credit unions sometimes offer competitive rates to their members. You can also buy CDs through a brokerage account, though brokerage CDs work slightly differently—they trade on a secondary market and may have different terms.

To compare CDs, look at the APY, the term length, and the early withdrawal penalty. A CD paying 5.3 percent for one year is not automatically better than one paying 5.1 percent for two years—it depends on how long you can actually leave the money alone. Use a CD calculator (most banks provide one free on their website) to see how much you will have at maturity.

You do not have to put all your money in one CD. Many people use a "CD ladder"—buying multiple CDs with different maturity dates so that some money becomes available each year without penalty. This gives you flexibility while still earning higher rates than a savings account.

FDIC and NCUA Insurance Protection

CDs held at banks are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per depositor, per bank. CDs at credit unions are insured by the National Credit Union Administration (NCUA) up to the same amount. This means if the bank or credit union fails, you get your money back up to the limit.

If you have more than $250,000 to invest in CDs, you can spread it across multiple banks to stay within the insurance limit at each one. Some people also buy CDs in different ownership categories—for example, one in your name alone and one in joint ownership with a spouse—because each category is insured separately.

This insurance applies only to the principal and earned interest. It does not protect you if you lose money because interest rates fell and you locked in a low rate, or if you withdraw early and pay a penalty. The insurance is there only if the bank itself fails.

CDs Versus Other Savings Options

A regular savings account is more flexible than a CD—you can withdraw money anytime without penalty—but it pays much lower interest, usually under 1 percent. A money market account sits between the two: it pays more than savings but less than CDs, and you can write checks or make withdrawals, though there are limits.

Treasury bills and bonds are another option. They are issued by the U.S. government and are very safe, but the rates and terms are different from CDs. Treasury bills mature in less than a year, while Treasury bonds can run 20 years or longer.

If you know you will not need the money for several years and want a may provide return, a CD is usually the simplest choice. If you might need the money sooner, a savings account or money market account is safer even if the rate is lower. The right choice depends on your timeline and how much certainty you need.

Frequently Asked Questions

Can I withdraw money from a CD before it matures?

Yes, but you will pay an early withdrawal penalty. The penalty is usually a set number of months of interest—three to six months is common. If you have earned less interest than the penalty, the bank takes the difference from your principal, so you could get back less than you deposited.

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

A savings account lets you withdraw money anytime without penalty but pays very low interest. A CD locks your money for a set term and pays much higher interest, but charges a penalty if you withdraw early. CDs are better if you do not need the money soon; savings accounts are better if you want flexibility.

Do I have to renew my CD when it matures?

No. Most banks automatically renew unless you tell them not to, but you have a grace period (usually seven to ten days) to withdraw the money or move it elsewhere. If you do nothing, the bank will renew at their current rate, which may be higher or lower than your original rate.

Are CDs safe if the bank fails?

Yes, up to $250,000 per depositor at FDIC-insured banks and NCUA-insured credit unions. If the bank fails, you get your principal and earned interest back up to that limit. If you have more than $250,000, spread it across multiple banks to stay protected.

What does APY mean on a CD?

APY stands for annual percentage yield. It shows the total return you will earn in one year, including the effect of compounding. It is the number to use when comparing CDs from different banks because it accounts for how often interest is added to your account.