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, the bank holds it for a period you choose (called the term), and in return, the bank pays you interest at a rate higher than a regular savings account. The catch is straightforward: if you withdraw the money before the term ends, you pay a penalty.

Think of it as a deal between you and the bank. You're saying "I promise not to touch this money for six months" (or one year, or five years), and the bank says "because you're committing to that, we'll pay you more interest than we would on a regular account." The bank uses your money during that time, so they reward you for letting them do that.

CDs are one of the safest places to put money in a bank. Your deposit is protected by the FDIC (Federal Deposit Insurance Corporation) up to $250,000 per account at each bank, which means if the bank fails, the government guarantees your money back.

Key Takeaways

  • You deposit a lump sum, choose how long to leave it (the term), and receive a fixed interest rate for that entire period.
  • The interest rate on a CD is higher than a regular savings account because you're agreeing not to withdraw early.
  • Withdrawing money before the term ends costs you a penalty, usually a few months' worth of interest.
  • Your money is FDIC-insured up to $250,000, making CDs one of the safest savings options available.
  • CDs work best if you have money you won't need for a specific period and want may provide returns.

How the interest rate and term work together

When you open a CD, you choose two things: how long your money stays in the account (the term) and what the bank will pay you (the interest rate). Common terms are three months, six months, one year, three years, and five years. The longer the term, the higher the interest rate usually is—a five-year CD typically pays more than a one-year CD at the same bank.

The interest rate is fixed, meaning it does not change for the entire term. If you lock in 4.5% on a two-year CD, you earn 4.5% every year for those two years, even if interest rates in the economy go up or down. This is different from a regular savings account, where the bank can lower your rate whenever they want.

At the end of the term, the CD matures. The bank then gives you back your original deposit plus all the interest you earned. You can then withdraw the money, move it to another account, or open a new CD.

What happens if you need the money early

The main drawback of a CD is the early withdrawal penalty. If you take money out before the term ends, the bank charges you a fee. This penalty is usually expressed as a number of months of interest—for example, a "three-month penalty" means you lose three months' worth of the interest you would have earned.

Let's say you open a one-year CD with $5,000 at 4% interest. After six months, you need the money. The bank might charge you a three-month penalty, which means you lose three months of interest. You'd get your $5,000 back, but you'd forfeit some of the interest you earned. The exact penalty varies by bank and by CD type, so always read the terms before you open one.

Some banks offer no-penalty CDs, which let you withdraw without a fee before the term ends. The trade-off is that these CDs pay a lower interest rate than regular CDs. They're useful if you think you might need the money but want better returns than a savings account.

Different types of CDs and what makes them different

Most CDs work the way described above, but banks offer variations. A bump-up CD lets you raise your interest rate once if rates go up during your term—useful if you think rates might increase. A step-up CD automatically increases your rate at set points during the term. A liquid CD or no-penalty CD lets you withdraw without penalty, though at a lower rate.

Some banks also offer promotional CDs with unusually high rates for a limited time, often when they're trying to attract new customers. These are real—the rate is may provide for your full term—but they're not always available, and the high rate applies only to new customers or new money.

Credit unions sometimes offer CDs too, and the terms and rates can differ from banks. Credit union CDs are also insured, but by the NCUA (National Credit Union Administration) instead of the FDIC. The protection is the same: up to $250,000 per account.

When a CD makes sense for your money

A CD works best when you have money you know you won't need for a specific period. If you're saving for a down payment on a house in three years, a three-year CD locks in a rate and keeps that money separate from your everyday spending. If you have an emergency fund already in place and some extra cash sitting in a low-interest savings account, moving part of it to a CD can earn you more without any extra effort.

CDs are less useful if you might need the money unexpectedly, because the penalty can eat into your gains. They're also less useful in a falling-rate environment—if rates drop after you lock in your CD, you're stuck with the higher rate, which is good. But if rates rise significantly, you're locked into a lower rate, which is frustrating (though you can always open a new CD when the first one matures).

CDs are not an investment in the stock market sense. You're not trying to grow your money quickly; you're trying to earn a may provide return that beats inflation and regular savings accounts. They're a tool for money you want to protect while earning a bit more.

How to compare CDs across banks

Interest rates on CDs vary by bank and change frequently. A bank offering 4.5% on a one-year CD today might offer 4.2% next week. Before you open a CD, check rates at several banks—your current bank, online banks, and local credit unions. Many banks publish their CD rates on their websites, and some websites aggregate rates from multiple banks so you can compare.

When comparing, look at the interest rate, the term length, the early withdrawal penalty, and any minimum deposit required. Some banks require $500 or $1,000 to open a CD; others have no minimum. A slightly lower rate at a bank with no minimum might be better than a slightly higher rate at a bank that requires $5,000.

Also check whether the bank is FDIC-insured (for banks) or NCUA-insured (for credit unions). This is not a reason to choose one over the other—both are safe—but it's important to confirm your money is protected.

What happens when your CD matures

When your term ends, the bank sends you a notice a few weeks before the maturity date. At that point, you have choices: withdraw the money, open a new CD at the current rate, or move the money to another account. Some banks automatically renew your CD at the new current rate if you don't tell them what you want to do, so read that notice carefully.

If you want to move your money to a different bank's CD because they're offering a better rate, you can do that without penalty—the penalty only applies if you withdraw early, not when the term actually ends. This is a good time to shop around and see if another bank has a better offer.

Frequently Asked Questions

Can I open a CD if I don't have much money?

It depends on the bank. Some banks require a minimum deposit of $500 or $1,000, while others have no minimum. Online banks often have lower minimums than traditional banks. Check with your bank or credit union about their specific requirements.

Is my money safe in a CD?

Yes. CDs are FDIC-insured at banks and NCUA-insured at credit unions, up to $250,000 per account. This means if the bank or credit union fails, the government guarantees your money back. CDs are one of the safest places to keep money.

What if I need to withdraw before the CD matures?

You can withdraw, but you'll pay an early withdrawal penalty. The penalty is usually a few months of interest. Some banks offer no-penalty CDs that let you withdraw without a fee, though they pay lower interest rates.

How is CD interest different from savings account interest?

CD interest is fixed for the entire term, so you know exactly what you'll earn. Savings account interest can change anytime the bank decides to lower it. CDs also pay higher rates because you're committing to leave the money untouched.

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

Most CDs do not allow you to add money after opening. You deposit a lump sum at the start, and that amount earns interest for the full term. If you want to save more, you'd open a separate CD or use a regular savings account.