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

CD stands for Certificate of Deposit. It is a basic banking product that works like this: you give your bank a sum of money, the bank agrees to pay you interest on it, and you agree not to withdraw that money until a specific date arrives. That date is called the maturity date. In exchange for locking your money away, the bank pays you more interest than it would on a regular savings account.

The reason banks offer this deal is straightforward. When you put money in a regular savings account, you can take it out whenever you want. The bank never knows how long it will have your money to lend out. With a CD, the bank knows exactly how long it will hold your funds — maybe three months, maybe five years — so it can plan ahead and lend that money out with confidence. That certainty is worth paying you extra for.

CDs are one of the safest places to keep money in the banking system. Your deposit is insured by the FDIC (Federal Deposit Insurance Corporation) up to $250,000, which means if the bank fails, the government guarantees you get your money back.

Key Takeaways

  • A CD requires you to deposit money for a fixed period — typically from three months to five years — and pay a penalty if you withdraw early.
  • CDs pay higher interest rates than savings accounts because the bank knows exactly when it will have access to your money.
  • Your CD is insured by the FDIC up to $250,000, making it one of the safest places to store money.
  • When your CD reaches maturity, you can withdraw the money penalty-free, renew it for another term, or move it elsewhere.
  • CD rates vary by bank, by how long you lock your money away, and by how much you deposit.

How the interest rate and term length work together

Two numbers define any CD: the interest rate (how much the bank pays you) and the term (how long you leave the money there). Generally, 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% annual interest, while a five-year CD from the same bank might pay 5% or more. The bank is willing to pay more because it gets to use your money for longer.

The interest rate also depends on which bank you use and what is happening in the broader economy. Different banks offer different rates on the same term length. Online banks often pay higher rates than brick-and-mortar banks because they have lower overhead costs. Rates also change over time — when the Federal Reserve raises interest rates, banks raise CD rates too, and vice versa.

The amount you deposit can matter as well. Some banks offer higher rates if you deposit $10,000 or more, while others pay the same rate regardless of deposit size. Always check what your specific bank offers before you open a CD.

What happens if you need the money before the maturity date

This is the main trade-off of a CD. If you withdraw money before the maturity date, the bank charges you a penalty, usually a certain number of months' worth of interest. For example, a three-month CD might have a penalty of one month's interest. If you withdraw early, you lose that interest and may lose some of your original deposit too.

The penalty amount varies by bank and by the CD's term. Longer-term CDs often have larger penalties. Before you open a CD, read the terms carefully to understand what the early withdrawal penalty is. Some banks have started offering CDs with no penalty for early withdrawal, though these typically pay lower interest rates to offset that flexibility.

If you think you might need the money within the CD's term, a regular savings account or a money market account might be a better choice, even though they pay less interest. The flexibility is worth something.

What happens when your CD reaches maturity

When the maturity date arrives, you have three main options. First, you can withdraw the money — both your original deposit and all the interest you earned — with no penalty. Second, you can renew the CD, which means the bank automatically rolls your money (plus interest) into a new CD for another term at the current interest rate. Third, you can move the money to a different bank or a different type of account.

Banks usually give you a window of time — often 7 to 10 days — after maturity to decide what to do. If you do nothing during that window, many banks automatically renew your CD. Check your bank's policy so you are not surprised. If rates have dropped since you opened your original CD, you might want to shop around before renewing rather than accepting whatever rate your bank offers.

CDs versus savings accounts and money market accounts

A regular savings account has no term and no penalty for withdrawal. You can take money out whenever you want. In exchange, the bank pays you a lower interest rate — often much lower. A money market account sits in the middle: it usually pays more interest than a savings account but less than a CD, and it lets you withdraw money without penalty, though there may be limits on how many withdrawals you can make per month.

The choice depends on your situation. If you have money you will not need for several years, a CD locks in a higher rate and removes the temptation to spend it. If you might need the money sooner, the flexibility of a savings account is worth the lower rate. If you want some of both — a bit more interest but also some access — a money market account is a middle ground.

How to find and open a CD

You can open a CD at any bank or credit union that offers them. Start by checking your current bank — if you already have an account there, opening a CD is usually straightforward. You can also compare rates across different banks, including online banks, which often pay higher rates than traditional banks. Websites that track CD rates can help you see what different institutions are offering.

To open a CD, you will need to provide basic information: your name, address, Social Security number, and the amount you want to deposit. You will also choose the term length. The process takes minutes if you do it online or over the phone, or you can walk into a branch. Once the CD is open, you straightforward wait. The interest accrues automatically, and you do nothing until the maturity date arrives.

Things to understand before you open a CD

CDs are safe and straightforward, but a few details matter. First, the interest you earn on a CD is taxable income. You will owe federal income tax on it, and possibly state tax too, depending on where you live. The bank will send you a tax form at the end of the year showing how much interest you earned. Second, if you have more than $250,000 to deposit, only the first $250,000 is FDIC-insured. If you want to insure more, you can open CDs at multiple banks or use other FDIC-insured account types.

Third, CDs do not keep pace with inflation over long periods. If you lock money into a five-year CD at 4% interest, but inflation averages 3% per year, your money is only growing about 1% faster than prices are rising. For money you will not need for many years, you might want to consider other options like stocks or bonds, which have higher growth potential but also carry more risk.

Frequently Asked Questions

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

No. A CD is a fixed deposit. Once you open it, you cannot add more money to that same CD. If you want to deposit more, you would need to open a separate CD. Some people open multiple CDs with staggered maturity dates so money becomes available at different times.

What is the shortest CD term available?

Most banks offer CDs with terms as short as three months, though some offer one-month or even weekly CDs. The shorter the term, the lower the interest rate. Longer terms — one year, three years, five years — are more common and usually pay better rates.

Do I pay taxes on CD interest while the money is locked away?

Yes. Even though you cannot access the money, you owe federal income tax on the interest each year it accrues, not just when the CD matures. The bank reports the interest to the IRS, and you report it on your tax return. Some states also tax CD interest.

What happens if the bank fails while I have a CD?

The FDIC insures your deposit up to $250,000, so you will get your money back even if the bank fails. The FDIC will either transfer your CD to another bank or pay you directly. This protection is automatic — you do not need to do anything.

Can I move a CD to a different bank before it matures?

Technically yes, but you will pay the early withdrawal penalty. It only makes sense to do this if another bank is offering a much higher rate and the penalty is smaller than the extra interest you would earn. In most cases, it is better to wait for maturity and then move the money.