A certificate of deposit is a savings product where you lend money to a bank for a set time in exchange for a may provide interest rate

When you open a regular savings account, the bank pays you interest on your balance, but that rate can change whenever the bank decides. A certificate of deposit (often called a CD) works differently: you agree to leave a specific amount of money untouched for a specific period — anywhere from a few months to several years — and in return, the bank locks in an interest rate just for you. That rate stays the same for the entire time, no matter what happens in the wider economy.

The tradeoff is access. If you need the money before the CD matures (the date when the term ends), you will pay an early withdrawal penalty — usually a certain number of months' worth of interest. This penalty is why CDs work best for money you know you will not need soon.

Key Takeaways

  • A CD locks in a fixed interest rate for a set period, ranging from a few months to five years or longer, and that rate does not change.
  • You must leave your money in the CD until the maturity date or pay an early withdrawal penalty, typically equal to several months of interest.
  • CDs are insured by the FDIC up to $250,000 per depositor per bank, the same protection that covers regular savings accounts.
  • CD rates are usually higher than savings account rates because the bank knows it can use your money for the full term without you withdrawing it.
  • When your CD matures, you can withdraw the money, open a new CD, or let it roll over into another CD at the bank's current rate.

How the interest rate and term length work together

The longer you agree to lock your money away, the higher the interest rate the bank will offer you. A three-month CD might pay 4% annually, while a two-year CD from the same bank might pay 5%. This is because the bank benefits more from having your money for longer — it can lend that money out and earn returns over a longer period.

The interest you earn is calculated on your principal (the amount you deposit) and compounds, meaning you earn interest on your interest. If you deposit $5,000 in a CD paying 5% annually for one year, you will have roughly $5,250 at maturity. The exact amount depends on how often the bank compounds the interest — daily, monthly, or quarterly — and the bank will tell you this when you open the CD.

What happens when your CD reaches maturity

On the maturity date, the CD stops earning interest and you have choices. You can withdraw the full amount (principal plus all interest earned) with no penalty. You can open a new CD with the same bank or a different bank. Or you can do nothing, and many banks will automatically roll the money into a new CD at whatever rate they are currently offering — this is called an automatic renewal.

If your bank automatically renews your CD and you do not want that, you have a grace period (usually seven to ten days after maturity) to withdraw the money or move it elsewhere without penalty. Check your CD agreement or call the bank to confirm the grace period, because it varies by bank.

Early withdrawal penalties and when they explore

If you withdraw money before the maturity date, the bank will subtract a penalty from your earnings. The penalty is usually stated as a number of months of interest — for example, "180 days of interest" or "six months of interest." On a $10,000 CD earning 5% annually, a six-month penalty would cost you roughly $250.

Some banks offer "no-penalty CDs" that let you withdraw early without losing interest, but these come with a lower interest rate to start with. It is a trade-off: you pay for flexibility by earning less. No-penalty CDs make sense if you think you might need the money but want a rate higher than a savings account offers.

FDIC protection and how much you can safely deposit

CDs are insured by the FDIC (Federal Deposit Insurance Corporation) up to $250,000 per depositor per bank. This means if the bank fails, the government will return your money up to that limit. This protection covers the principal you deposited plus all interest earned, as long as the total does not exceed $250,000.

If you want to deposit more than $250,000 in CDs, you can open accounts at different banks and each one will be separately insured. You can also open a CD in your name alone and another in joint names with a spouse or partner — these are counted separately for insurance purposes. The FDIC website has a calculator that shows you exactly how much of your money is covered at each bank.

Comparing CDs to savings accounts and money market accounts

A regular savings account gives you access to your money anytime with no penalty, but the interest rate is usually lower and can change. A CD locks in a higher rate but restricts your access. A money market account is a middle ground: it typically offers a rate between savings and CDs, allows you to write checks or make withdrawals, but may require a higher minimum balance.

Choose a CD if you have money you will not need for several months or years and want the security of a locked-in rate. Choose a savings account if you need quick access or are building an emergency fund. The best choice depends on when you will need the money and how much interest rate matters to you.

Where to open a CD and what to compare

You can open a CD at any bank or credit union. Online banks often offer higher rates than brick-and-mortar banks because they have lower overhead costs. Before opening a CD, compare the interest rate, the term length, the early withdrawal penalty, and the minimum deposit required.

A website like Bankrate or DepositAccounts lists current CD rates from many banks so you can see what is available. Pay attention to the annual percentage yield (APY), which includes the effect of compounding and tells you the true return. A CD paying 5.00% APY will earn you more than one paying 4.99% APY, even though the difference looks small.

Frequently Asked Questions

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

No. A CD is a fixed contract — you deposit a set amount at the start, and that amount stays the same until maturity. If you want to deposit more money, you must open a separate CD. Some banks let you open multiple CDs at once if you want to spread your money across different terms.

What if I need the money before the CD matures?

You can withdraw it, but you will pay an early withdrawal penalty. The penalty is usually several months of interest. Before withdrawing, call your bank and ask what the exact penalty will be — it is better to know the cost upfront than to be surprised when the money hits your account.

Is the interest I earn on a CD taxable?

Yes. The interest you earn on a CD is taxable income in the year you earn it, even if you do not withdraw the money. Your bank will send you a 1099-INT form at tax time showing how much interest you earned. If the CD is in a retirement account like an IRA, the rules are different — ask your bank or a tax professional.

What is the difference between a CD and a bond?

Both lock in a rate for a set time, but they work differently. A CD is a bank product insured by the FDIC. A bond is a loan you make to a company or government, and its value can go up or down before maturity. CDs are simpler and safer for someone new to saving; bonds require more knowledge to understand the risks.

Can I move a CD from one bank to another?

You can withdraw the money and open a new CD elsewhere, but you will pay an early withdrawal penalty at your current bank. You cannot transfer a CD directly without closing it first. If your current CD is close to maturity, it may make sense to wait rather than pay the penalty.