A certificate of deposit, or CD, is a savings product offered by banks and credit unions that pays a fixed interest rate in exchange for keeping your money deposited for a set period of time. You make one deposit, agree not to touch it for a specific term (anywhere from a few months to five years or more), and earn a guaranteed return that’s typically higher than a regular savings account. When the term ends, you get your original deposit plus all the interest it earned.
How CDs Work
A CD has four basic components. The principal is the amount you deposit when you open the account. The term is how long you agree to leave the money untouched, commonly ranging from three months to five years. The interest rate, usually expressed as an annual percentage yield (APY), tells you exactly what you’ll earn over the life of the CD. And the maturity date is when the term ends and you can withdraw your funds without penalty.
Most CDs pay a fixed interest rate, meaning the rate you lock in at opening stays the same for the entire term. This is one of the main appeals: if you open a CD paying 4.5% APY, you’ll earn that rate even if banks start offering lower rates six months later. CDs also earn compound interest, which means earned interest gets added to your principal balance, and that larger balance then earns interest too. The result is your money grows slightly faster than it would with simple interest alone.
You make one initial deposit and leave it alone until maturity. Unlike a savings account, you generally can’t add more money to a CD after opening it. When the CD matures, most banks give you a short window (often 7 to 10 days) to withdraw the funds or roll them into a new CD. If you don’t act, the bank will typically renew the CD automatically at whatever rate it’s currently offering, which may be lower than your original rate.
Early Withdrawal Penalties
The trade-off for a guaranteed rate is restricted access to your money. If you pull funds out before the maturity date, you’ll pay an early withdrawal penalty. This penalty is calculated as a certain number of days’ or months’ worth of interest. For example, a bank might charge 60 days of interest on a one-year CD, or 150 days of interest on a five-year CD. The longer the term, the steeper the penalty tends to be.
Most banks require you to withdraw the entire balance if you want out early, meaning partial withdrawals aren’t an option at many institutions. And in some cases, the penalty can actually eat into your original deposit. If you withdraw very early in the term before much interest has accumulated, the penalty gets subtracted from your principal, so you walk away with less than you put in. This makes CDs a poor choice for money you might need on short notice.
Types of CDs
Traditional fixed-rate CDs are the most common, but several variations exist for people who want more flexibility or protection against changing interest rates.
- No-penalty (liquid) CDs let you withdraw your money before the term ends, generally after the first week, without paying a penalty. The catch is a lower APY than a traditional CD of the same length. These work well if you want a better rate than a savings account but aren’t sure you can commit for the full term.
- Bump-up CDs allow you to request one or more interest rate increases during the term if your bank raises its rates. The starting APY is typically lower than a traditional CD, so you’re betting that rates will climb enough to make up the difference.
- Step-up CDs work similarly but raise your rate automatically at predetermined intervals. You don’t have to ask for the increase. Like bump-up CDs, they usually start with a lower rate than a traditional CD of the same term.
- Brokered CDs are sold through brokerage accounts rather than directly from a bank. They let you shop across many banks from a single account, which is convenient if you want competitive rates without opening accounts at multiple institutions. One important note: not all brokered CDs carry federal deposit insurance, so verify coverage before buying.
Federal Deposit Insurance
CDs at FDIC-insured banks are protected up to $250,000 per depositor, per institution. At federally insured credit unions, the National Credit Union Administration (NCUA) provides the same $250,000 coverage per member. Joint accounts get $250,000 in coverage per owner, so a CD held jointly by two people is insured up to $500,000 at a single institution.
This insurance means that even if the bank fails, you’ll get your money back up to the coverage limit. If you have more than $250,000 to put into CDs, you can spread your deposits across multiple institutions so each stays within the insurance cap.
Building a CD Ladder
One of the most practical strategies for CD investors is called a ladder. Instead of putting all your money into a single CD with one maturity date, you split it across several CDs with staggered terms. For example, if you have $10,000, you might put $2,000 each into a one-year, two-year, three-year, four-year, and five-year CD.
After the first year, your shortest CD matures. You can spend that money if you need it, or reinvest it into a new five-year CD at whatever rate is available. The next year, another CD matures, and you repeat the process. Within a few years, you have a CD maturing every 12 months.
This approach solves two problems at once. First, it reduces interest rate risk. If rates rise, you’ll have money coming free regularly to reinvest at higher rates. If rates fall, your longer-term CDs are still locked in at the older, higher rates. Second, it improves liquidity. Because a CD is always maturing relatively soon, you’re less likely to need an early withdrawal and the penalty that comes with it. You know exactly how much you’ll get back and when.
When CDs Make Sense
CDs are best suited for money you’re confident you won’t need during the term. Common uses include saving for a specific goal with a known timeline, like a down payment you’ll need in two years, or parking an emergency reserve you’ve already fully funded and want to earn more on. They’re also useful in falling-rate environments: locking in a high APY before rates drop means you keep earning that rate while savings account yields decline around you.
CDs are less appealing when interest rates are rising quickly, since your money is locked in at the old rate. They’re also a poor fit for long-term growth compared to investments like index funds, which carry more risk but historically deliver higher returns over decades. The strength of a CD is predictability: you know exactly what you’ll earn, your principal is protected by federal insurance, and there are no market swings to worry about.