A CD is a savings account where you lock money away for a set time in exchange for a higher interest rate

A certificate of deposit (CD) is an account at a bank or credit union where you deposit money and agree not to touch it until a specific date. In return, the institution pays you a fixed interest rate—usually higher than a regular savings account offers. You know exactly how much interest you will earn before you open the account, and that rate does not change.

The trade-off is simple: you give up access to your money for a period of time (called the term), and the bank or credit union gives you better returns. Terms typically range from three months to five years, though some institutions offer longer or shorter options. When your term ends, you get your original deposit plus all the interest earned.

CDs are insured by the Federal Deposit Insurance Corporation (FDIC) if held at a bank, or by the National Credit Union Administration (NCUA) if held at a credit union. This means your money is protected up to $250,000 per account, per institution, even if the bank fails.

Key Takeaways

  • A CD locks your money for a set term (three months to five years or longer) in exchange for a may provide interest rate higher than regular savings accounts.
  • You know your exact interest earnings before you open the account, and the rate stays the same for the entire term.
  • Withdrawing money before the term ends triggers an early withdrawal penalty, which reduces your interest earnings or principal.
  • CDs are FDIC or NCUA insured up to $250,000, making them a low-risk place to store money you do not need immediately.
  • Interest rates and terms vary by bank or credit union, so comparing offers before opening an account can significantly increase your earnings.

How interest rates and terms work together

The interest rate on a CD is fixed, meaning it does not move up or down during your term. If you open a one-year CD at 4.50% annual percentage yield (APY), you will earn 4.50% for the full year, regardless of whether market rates rise or fall. This certainty is one reason people choose CDs over savings accounts, where rates can drop.

Longer terms usually come with higher rates. A three-month CD might pay 4.00% APY, while a five-year CD at the same bank might pay 5.00% APY. The bank is willing to pay more because it has your money locked in for longer. However, this also means your money is unavailable for longer, so you need to weigh whether the extra interest is worth the reduced access.

Interest compounds based on how often the bank credits it to your account—daily, monthly, or quarterly. More frequent compounding means you earn interest on your interest, though the difference is usually small on shorter terms. The bank will tell you the compounding schedule when you open the account.

What happens when your CD matures

When your term ends, your CD matures. At that point, you have options: withdraw the money, let it roll over into a new CD at the current rate, or move it elsewhere. Most banks have a grace period—usually seven to ten days—during which you can decide what to do without penalty.

If you do nothing during the grace period, many banks automatically renew your CD into a new term at whatever rate they are currently offering. This can work in your favor if rates have risen, but it can hurt you if rates have fallen. Read your CD agreement to understand your bank's renewal policy, and mark your maturity date on a calendar so you do not miss the window to make a choice.

Some banks offer no-penalty CDs, which let you withdraw your money early without losing interest. These accounts pay lower rates than traditional CDs because you have more flexibility. They are useful if you want CD-like returns but are not certain you can lock money away for the full term.

Early withdrawal penalties and how they work

If you need your money before the term ends, you can withdraw it—but the bank will charge an early withdrawal penalty. This penalty is typically a certain number of months of interest. For example, a penalty might be three months of interest, meaning if you withdraw early, the bank subtracts three months' worth of earnings from your account.

The penalty amount varies by bank and by CD term. A three-month CD might have a penalty of one month of interest, while a five-year CD might have a penalty of six months or more. Before opening a CD, ask the bank what the penalty is—it should be in writing in your account agreement. Some banks also allow you to withdraw interest without penalty, but not principal.

The penalty can eat into your earnings or even your original deposit if you withdraw very early. For example, if you open a one-year CD with $5,000 at 4.50% APY and withdraw after two months, you might earn only $75 in interest but owe a $112.50 penalty (three months of interest), leaving you with $4,962.50. This is why CDs work best for money you genuinely will not need during the term.

CD laddering: a strategy to balance rate and access

Some savers use a strategy called CD laddering to get higher rates while maintaining regular access to their money. 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, giving you access to that portion of your money. When it matures, you can withdraw it or open a new one-year CD at the current rate.

Laddering lets you take advantage of higher long-term rates without locking all your money away for five years. It also lets you reinvest portions of your money as rates change. If rates rise, you can put maturing money into a higher-rate CD. If rates fall, you still have money earning the old, higher rate.

Laddering requires more attention than a single CD—you have to track multiple maturity dates and make decisions several times a year. But for people with larger amounts to save and a willingness to manage multiple accounts, it can be an effective way to earn more while keeping some money accessible.

Comparing CD rates across banks and credit unions

CD rates vary significantly between institutions. A bank offering 4.50% APY on a one-year CD might be right next to one offering 3.75% on the same term. Over a year, that 0.75% difference adds up: on $10,000, it means $75 more in your pocket. Shopping around before you open a CD is worth the time.

Online banks and credit unions often offer higher rates than brick-and-mortar banks because they have lower overhead costs. However, you should verify that any institution is FDIC or NCUA insured before depositing money. You can check the FDIC's Bank Find tool or the NCUA's Credit Union Locator on their websites to confirm.

When comparing, look at the APY (annual percentage yield), not just the interest rate. APY includes the effect of compounding, so it shows you the true return. Also check the minimum deposit required—some CDs require $500 or $1,000 to open, while others have no minimum. And confirm the early withdrawal penalty before committing, since that affects your flexibility.

CDs versus savings accounts and money market accounts

A regular savings account lets you deposit and withdraw money anytime without penalty, but the interest rate is usually much lower than a CD—often 0.01% to 0.50% APY. You have full access but earn very little. A CD pays more but requires you to lock money away.

A money market account sits between the two. It typically pays more than a savings account but less than a CD, and it usually lets you make a limited number of withdrawals per month without penalty. Money market accounts are useful if you want better returns than savings but need more access than a CD allows.

Choose a CD if you have money you will not need for several months or years and want the highest may provide return. Choose a savings account if you need quick access and do not mind lower interest. Choose a money market account if you want something in between. Your choice depends on when you will need the money and how much interest matters to you.

Frequently Asked Questions

Can I add money to a CD after I open it?

No. A CD is a fixed deposit—you choose the amount when you open it, and you cannot add more money to that account. If you want to deposit additional funds, you must open a separate CD. Some people open multiple CDs at different times to build a ladder of maturing accounts.

What happens if I need my money before the CD matures?

You can withdraw it, but you will pay an early withdrawal penalty. The penalty is usually a set number of months of interest. Before opening a CD, confirm the penalty amount in writing. No-penalty CDs exist but pay lower rates in exchange for the flexibility to withdraw early without losing interest.

Is a CD a good place to keep emergency money?

CDs are not ideal for true emergencies because withdrawing early costs you interest. Keep three to six months of expenses in a regular savings account for emergencies, and use CDs for money you know you will not need for at least several months. The higher rate is only worth it if you can actually leave the money untouched.

Do I pay taxes on CD interest?

Yes. CD interest is taxable income in the year it is earned or credited to your account. Your bank will send you a 1099-INT form at tax time showing how much interest you earned. If you earn more than $10 in interest across all accounts, you must report it on your tax return.

What if rates rise after I open my CD?

You are locked into your original rate for the entire term. If rates rise, you cannot change your rate mid-term. This is the risk of opening a CD in a rising-rate environment. However, when your CD matures, you can open a new one at the higher rate. Some savers use CD laddering to reduce this risk by having CDs mature at different times.