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 straightforward contract between you and a bank. You give the bank a lump sum of money—say $1,000 or $5,000—and promise not to touch it for a specific period. That period might be three months, six months, one year, or five years. In return, the bank pays you a fixed interest rate that is almost always higher than what you would earn in a regular savings account.

The word "certificate" comes from the fact that the bank used to issue you an actual paper document proving you owned the CD. Today most CDs are digital, but the name stuck. The deposit part is straightforward: you are depositing money, just like you would in any savings account.

The key difference from a regular savings account is the maturity date—the day your CD term ends. On that date, the bank returns your original deposit plus all the interest you earned. If you need the money before that date, you can withdraw it, but the bank will charge you a early withdrawal penalty, which means you lose some of the interest you earned, or sometimes a flat fee.

Key Takeaways

  • You lock money into a CD for a fixed term—typically three months to five years—and the bank pays you a set interest rate for the entire period.
  • The interest rate on a CD does not change, even if the bank's rates go up or down while your CD is open.
  • If you withdraw money before the maturity date, you will pay an early withdrawal penalty that reduces your earnings.
  • CDs are insured by the FDIC up to $250,000 per account, so your principal is protected even if the bank fails.
  • A CD makes sense if you have money you will not need for several months or years and want a may provide return.

How the interest rate and term length work together

When you open a CD, you choose two things: how long to lock up your money, and which CD product the bank offers. The bank sets the interest rate for each term length. Longer terms usually pay higher rates because the bank gets to use your money for a longer time. A one-year CD might pay 4.5 percent, while a five-year CD might pay 5.2 percent. But this is not a rule—rates depend on what the bank decides and what is happening in the broader economy.

The interest rate you receive is fixed, meaning it does not change for the entire term. If you lock in 4.5 percent on a one-year CD, you will earn 4.5 percent for the full twelve months, even if the bank raises its rates to 5.5 percent next month. This is different from a savings account, where the rate can move up or down at any time.

Interest on a CD is usually compounded daily or monthly, meaning the bank calculates interest on your original deposit plus any interest you have already earned. The more often interest compounds, the slightly more you earn—but the difference is usually small.

What happens when your CD reaches maturity

When your maturity date arrives, the bank will notify you. You then have a choice: withdraw the money, or let the bank automatically renew the CD for another term at whatever rate the bank is offering at that moment. This automatic renewal is called a rollover.

If you do nothing, most banks will roll your CD over automatically. The new rate might be higher or lower than what you just earned. If you want to withdraw your money instead, you usually have a grace period—often seven to ten days—to tell the bank before the rollover happens. If you miss that window and the CD rolls over, you can still withdraw without penalty during the rollover period, but after that, the early withdrawal penalty kicks in again.

This is why it matters to mark your maturity date on a calendar or set a phone reminder. If you want your money and you miss the window, you will either be locked in for another term or face a penalty to get out.

Early withdrawal penalties and when they apply

If you need your money before the maturity date, the bank will let you take it out, but you will pay a price. The early withdrawal penalty is usually a certain number of months of interest. For example, a one-year CD might have a penalty of three months of interest. If you were earning $100 per year and you withdraw after six months, you would lose $25 in interest (three months' worth), so you would receive your original deposit plus only $25 instead of $50.

Some banks charge a flat dollar amount instead—say $25 or $50—rather than a percentage of interest. A few banks charge no penalty at all, though these usually offer lower interest rates to make up for it. Before you open a CD, the bank must tell you what the penalty is. Read it carefully, because it varies widely.

The penalty applies only if you withdraw before maturity. Once the CD matures and you withdraw, there is no penalty, even if you withdraw the day after maturity.

FDIC insurance and how your money is protected

CDs held at banks insured by the FDIC (Federal Deposit Insurance Corporation) are protected up to $250,000 per depositor, per bank, per account type. This means if the bank fails, the FDIC will return your deposit and interest up to that limit. You do not have to do anything to get this protection—it is automatic.

The $250,000 limit applies to each bank separately. If you have a CD at Bank A and a CD at Bank B, each is insured up to $250,000. If you have multiple CDs at the same bank, they are usually added together for insurance purposes. So if you have a $150,000 one-year CD and a $150,000 three-year CD at the same bank, the FDIC would cover only $250,000 of the $300,000 total.

Credit unions offer a similar protection through the NCUA (National Credit Union Administration) with the same $250,000 limit. If you are considering a CD at a credit union, you can check whether it is NCUA-insured on the credit union's website.

Why banks offer CDs and why you might choose one

Banks offer CDs because they want to borrow money from you for a predictable period. When you lock your money in a CD, the bank knows it can lend that money out for a loan or investment without worrying that you will suddenly withdraw it. In exchange, the bank pays you more interest than it would on a savings account, where you could withdraw anytime.

You might choose a CD if you have money you will not need for several months or years and you want a may provide return. Unlike stocks or bonds, a CD's return does not fluctuate. You know exactly how much you will have at maturity. This makes CDs useful for money you are saving toward a specific goal—a down payment on a house, a car, a wedding—if that goal is still several years away.

CDs are less useful if you might need the money sooner, because the early withdrawal penalty will eat into your earnings. They are also less useful if you think interest rates will rise significantly, because you will be locked into a lower rate. In that case, a high-yield savings account, which lets you withdraw anytime and sometimes raises its rate, might be a better choice.

CD ladders and how to manage multiple CDs

Some people use a strategy called CD laddering to balance the higher rates of longer-term CDs with the flexibility of shorter terms. Here is how it works: instead of putting all your money into one five-year CD, you split it into five one-year CDs. Each year, one CD matures. You can then decide whether to withdraw that money, spend it, or roll it into a new five-year CD.

This approach gives you access to some of your money every year while still earning rates closer to what you would get with longer terms. It also protects you if rates rise: when each CD matures, you can lock in the new, higher rate instead of being stuck with an old rate for years.

Laddering requires more attention than a single CD—you have to track multiple maturity dates and make decisions each time one matures. But for people with larger amounts to save, it can be a useful way to earn more interest without locking everything away for years.

Frequently Asked Questions

Can I withdraw money from a CD before it matures without a penalty?

Most banks charge an early withdrawal penalty if you take money out before the maturity date. A few banks offer no-penalty CDs, but these pay lower interest rates. Check the bank's disclosure before you open the CD to see what the penalty is.

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

A savings account lets you withdraw money anytime, but the interest rate is lower and can change. A CD locks your money for a set term and pays a higher, fixed rate. You pay a penalty if you withdraw early from a CD.

Do I have to pay taxes on CD interest?

Yes. CD interest is taxable income. The bank will send you a 1099-INT form at tax time showing how much interest you earned. You report this on your tax return just like any other interest income.

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

Most banks automatically renew your CD for another term at the current rate. You usually have a grace period of seven to ten days after maturity to withdraw without penalty. If you miss that window, you are locked in for another term.

Can I open multiple CDs at the same bank?

Yes, but they count together for FDIC insurance purposes. If you have $300,000 in CDs at one bank, only $250,000 is insured. To insure more, you would need to split the money across different banks.