A CD is a savings account where you agree to leave your money untouched for a set time in exchange for a higher interest rate

A Certificate of Deposit, or CD, is a type of savings account offered by banks and credit unions. You deposit money, agree not to touch it for a specific period (called the "term"), and the bank pays you interest at a rate higher than you would earn in a regular savings account. When your term ends, you get your original money back plus the interest you earned.

The trade-off is straightforward: the bank wants to know your money will stay there, so they reward you for that certainty. A regular savings account lets you withdraw whenever you want, which costs the bank flexibility. A CD locks in your money, which lets them lend it out with confidence, so they pass some of that benefit to you as a better interest rate.

Key Takeaways

  • You deposit a lump sum, agree to leave it for a set term (typically three months to five years), and receive a may provide interest rate for that entire period.
  • CDs pay more interest than regular savings accounts because your money is locked in and the bank can count on having it available to lend.
  • If you withdraw your money before the term ends, you pay a penalty—usually a few months' worth of interest—so only use a CD for money you won't need soon.
  • Your deposit is insured up to $250,000 by the FDIC (at banks) or NCUA (at credit unions), so your money is safe even if the institution fails.
  • CD rates change based on what the Federal Reserve does with interest rates, so the rate you lock in today may be higher or lower than rates offered next month.

How the term and interest rate work together

When you open a CD, you choose how long to lock in your money. Common terms are three months, six months, one year, two years, three years, and five years. The longer the term, the higher the interest rate usually is—because the bank gets to use your money for longer. A one-year CD might pay 4.5 percent, while a five-year CD at the same bank might pay 5.2 percent.

The interest rate is fixed, meaning it does not change during your term. If you lock in 4.5 percent for one year, you earn 4.5 percent for the entire year, even if the bank's rates drop to 3 percent next month. That certainty works both ways: you know exactly what you will earn, but you also cannot benefit if rates go up.

Interest is usually paid monthly or at the end of the term, depending on the CD. Some banks add it to your CD balance (so you earn interest on your interest), while others send it to a linked savings account. Ask your bank which way they do it before you open the CD.

What happens when your term ends

When your CD reaches its maturity date—the day your term ends—you have choices. You can withdraw the full amount (your deposit plus all interest earned) with no penalty. You can also let the bank automatically renew your CD into a new term at whatever rate they are offering at that moment, which is usually lower than what you just earned.

Banks typically give you a grace period of seven to ten days after maturity to decide what to do. If you do nothing during that window, most banks will roll your money into a new CD at the current rate. Read your CD agreement to see what your bank does, because you do not want to be surprised by an automatic renewal into a lower rate.

The early withdrawal penalty and when it matters

If you need your money before the term ends, you can withdraw it—but you will pay a penalty. The penalty is usually a set number of months of interest. For example, a one-year CD might have a three-month interest penalty, meaning if you withdraw after six months, you lose three months' worth of the interest you earned. On a five-year CD, the penalty might be six months or a year of interest.

This is why CDs only make sense for money you are confident you will not need. If you might need the cash in an emergency, a regular savings account is safer, even though it pays less interest. The penalty can be steep enough that you end up earning less than you would have in a savings account, especially if you withdraw early from a long-term CD.

Some banks now offer "no-penalty CDs" or "flexible CDs" that let you withdraw without a penalty, but they pay lower interest rates to offset that flexibility. These are worth comparing if you are uncertain about your timeline.

How CD rates compare to other accounts

A regular savings account at most banks pays between 0.01 and 0.5 percent interest. A money market account (another type of savings account) might pay slightly more. A CD typically pays two to three times what a savings account pays, depending on the term and the current interest rate environment.

The difference matters most when you have a larger amount to save. On $1,000, the difference between 0.1 percent and 4.5 percent is small in dollar terms. On $10,000 or $50,000, the higher CD rate adds up. That is why CDs are most useful for money you have saved up and do not plan to use for a year or more.

FDIC and NCUA protection for your CD

Your CD is insured by the FDIC (Federal Deposit Insurance Corporation) if you open it at a bank, or by the NCUA (National Credit Union Administration) if you open it at a credit union. This means if the bank or credit union fails, the government guarantees you will get your money back, up to $250,000 per account.

The $250,000 limit applies to all your deposits at the same institution combined—all your savings accounts, checking accounts, and CDs together count toward that limit. If you have more than $250,000 to save, you can open CDs at different banks to keep all your money insured. Some people use this strategy to earn higher CD rates while keeping everything protected.

Where to find and compare CDs

You can open a CD at any bank or credit union where you have an account, or you can shop around. Online banks often pay higher CD rates than brick-and-mortar banks because they have lower overhead costs. Credit unions sometimes offer competitive rates to their members. Websites that compare CD rates across institutions can help you see what is available in your area or online.

When you compare, look at three things: the interest rate, the term length, and the early withdrawal penalty. A slightly higher rate might not be worth a much steeper penalty. Also check whether the bank requires a minimum deposit—some CDs require $500 or $1,000 to open, while others let you start with $100.

Frequently Asked Questions

Can I add more money to my CD after I open it?

No. Once you open a CD, the amount you deposit is locked in. You cannot add to it during the term. If you want to save more, you would open a separate CD or use a regular savings account for additional deposits.

What if I need my money before the CD matures?

You can withdraw it, but you will pay an early withdrawal penalty—usually a few months of interest. Calculate whether what you earn minus the penalty is still worth it compared to a savings account. For short-term emergencies, a savings account is usually the better choice.

Do CD rates ever go down during my term?

No. Your rate is locked in for the entire term. If interest rates drop, you keep earning your original rate. If rates rise, you earn your original rate until maturity, then you can choose whether to renew at the new (higher) rate or move your money elsewhere.

Is my CD safe if the bank goes out of business?

Yes. The FDIC (at banks) or NCUA (at credit unions) insures your CD up to $250,000. Even if the institution fails, you will receive your deposit and all earned interest, up to that limit.

Should I open a CD or keep money in a savings account?

Use a CD for money you will not need for at least a year and want to earn more interest on. Use a savings account for money you might need sooner, or for an emergency fund. Many people do both: a CD for longer-term savings and a savings account for flexibility.