What a CD is and why banks offer them

A certificate of deposit, or CD, is an agreement between you and a bank. You give the bank a sum of money for a fixed period of time — anywhere from a few months to five years or longer — and the bank pays you a set interest rate on that money. When the time is up, you get your original money back plus the interest earned.

Banks offer CDs because they want to know they will have your money available for a predictable stretch of time. That certainty lets them lend that money out to other customers or invest it themselves. In return, they pay you a higher interest rate than you would earn in a regular savings account, where you can withdraw money whenever you want.

The tradeoff is straightforward: you give up the ability to access your money freely, and the bank gives you a better rate. If you need the money before the CD matures — the date when the term ends — you will pay a penalty, usually a few months' worth of interest.

Key Takeaways

  • You deposit a fixed amount of money for a set period, and the bank locks in an interest rate that does not change for the entire term.
  • The interest rate on a CD is almost always higher than what a savings account offers, because you agree not to touch the money until maturity.
  • If you withdraw money before the maturity date, you will lose some or all of the interest you earned, depending on the bank's early withdrawal penalty.
  • CDs are insured by the FDIC up to $250,000 per depositor per bank, so your principal is protected even if the bank fails.
  • You can open a CD at any bank or credit union, and rates vary widely — shopping around before you commit can mean hundreds of dollars in extra interest.

How the interest rate and term work together

When you open a CD, you choose two things: how long you want to lock your money away, and you accept whatever rate the bank is offering for that term. Common terms are 3 months, 6 months, 1 year, 2 years, 3 years, and 5 years. Longer terms usually come with higher rates, because the bank gets to use your money for a longer stretch.

The rate is fixed, meaning it does not move. If you open a 2-year CD at 4.5 percent, you will earn 4.5 percent for the full two years, even if the bank's rates drop to 2 percent next month or climb to 6 percent. That stability is one reason people use CDs — you know exactly what you will earn.

Interest on a CD compounds, usually daily or monthly depending on the bank. That means you earn interest on your interest. The longer the term and the higher the rate, the more your money grows. A $5,000 CD at 4 percent for one year will earn roughly $200 in interest. The same $5,000 at 4 percent for five years will earn over $1,000, because each year's interest gets added to the balance and earns interest itself the following year.

What happens when your CD reaches maturity

On the maturity date, your CD term ends. The bank will send you a notice a few weeks beforehand, usually by mail or email, telling you what date your CD matures and what your options are. At that point, you have several choices.

You can withdraw the full amount — your original deposit plus all the interest earned — with no penalty. You can also let the CD renew or roll over, which means the bank automatically opens a new CD for you with the same term, using your original deposit plus the interest as the new balance. The new CD will be at whatever rate the bank is offering at that moment, which may be higher or lower than your previous rate.

Most banks give you a grace period, usually 7 to 10 days, during which you can withdraw your money or move it elsewhere without penalty. If you do nothing and let the grace period pass, the CD automatically renews. Read the maturity notice carefully so you do not accidentally lock your money away for another term when you meant to withdraw it.

Early withdrawal penalties and when they explore

If you need your money before the maturity date, you can withdraw it, but you will pay an early withdrawal penalty. The penalty is usually expressed as a number of months of interest. A CD might have a penalty of three months' interest, which means if you withdraw early, the bank subtracts three months' worth of what you would have earned and keeps that amount.

The penalty varies by bank and by term length. Shorter-term CDs often have smaller penalties — a 3-month CD might have a one-month penalty — while longer-term CDs have larger ones. A 5-year CD might have a penalty of six months or even a full year of interest. Always ask the bank what the penalty is before you open the CD, because it changes how much it actually costs you to access your money early.

In some cases, if you withdraw very early, the penalty can eat up all your interest and even take a small bite out of your original deposit. For example, if you open a 1-year CD, earn $100 in interest over three months, then withdraw, a three-month penalty might cost you $75, leaving you with only $25 in interest. This is why CDs work best for money you genuinely will not need.

FDIC insurance and how your money is protected

Money in a CD at a bank is insured by the FDIC (Federal Deposit Insurance Corporation) up to $250,000 per depositor per bank. That means if the bank fails, the FDIC will return your deposit and all earned 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 all your deposits at one bank combined. If you have a CD for $150,000 and a savings account for $100,000 at the same bank, the FDIC covers both, but only up to $250,000 total. If you want to protect more than $250,000, you can open accounts at different banks, and each bank's deposits are insured separately.

Credit unions offer a similar protection called NCUA insurance (National Credit Union Administration), also up to $250,000 per member per credit union. This protection makes CDs one of the safest places to put money — you are not betting on the bank's success, because the government backs your deposit.

Shopping for CDs and comparing rates

CD rates change frequently and vary widely between banks. A bank offering 4.5 percent on a 1-year CD might be right next to one offering 3.8 percent. Over a year, that 0.7 percent difference means real money — on a $10,000 CD, it is about $70 in extra interest.

Before you open a CD, check rates at several banks. Online banks often offer higher rates than brick-and-mortar banks because they have lower overhead costs. You can compare rates on sites like Bankrate, DepositAccounts, or the banks' own websites. Write down the rate, the term, and the early withdrawal penalty for each one, then do the math on how much interest you would earn.

Also pay attention to the minimum deposit. Most CDs require at least $500 or $1,000 to open, but some banks have no minimum. If you are working with a small amount of money, a no-minimum CD might be your only option. Once you find a rate and bank you like, you can usually open a CD online in a few minutes.

When a CD makes sense for your situation

A CD works best if you have money you will not need for a specific period of time and you want a may provide return. If you are saving for a down payment on a house in two years, a 2-year CD locks in a rate and keeps you from spending the money. If you have an emergency fund that is already fully stocked and you have extra cash sitting in a low-interest savings account, moving some of it to a CD can earn you more without any real risk.

CDs are less useful if you might need the money soon, because the early withdrawal penalty will cost you. They are also less useful if you think interest rates are about to rise significantly — if rates climb, you will be stuck earning a lower rate on your locked-in CD. In that case, a high-yield savings account, which lets you withdraw anytime without penalty, might be a better choice even if the rate is slightly lower.

Some people use a strategy called a CD ladder, where they open multiple CDs with different maturity dates — one that matures in one year, one in two years, one in three years, and so on. As each CD matures, they can withdraw the money or reinvest it, giving them regular access to portions of their money while still earning higher rates on the rest.

Frequently Asked Questions

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

No. Early withdrawal always costs you, usually several months of interest. Some banks offer no-penalty CDs that let you withdraw without a fee, but these come with lower interest rates to make up for the flexibility. If you think you might need the money, ask about no-penalty CDs before you open a regular one.

What happens to my CD if the bank goes out of business?

The FDIC insures your CD up to $250,000, so you will get your full deposit and all earned interest back. The FDIC takes over and pays depositors directly. This protection is automatic — you do not need to register or do anything.

Is the interest rate on a CD may provide to stay the same?

Yes, for the entire term. Once you open a CD at a set rate, that rate does not change, no matter what happens to the bank's other rates. When your CD matures, the new rate will be whatever the bank is offering at that time.

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

You can withdraw the money and move it, but you will pay the early withdrawal penalty. It is usually not worth it unless the new bank's rate is significantly higher and you plan to keep the money there for a long time. Do the math first to see if the higher rate makes up for the penalty.

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

A savings account lets you withdraw money anytime with no penalty, but the interest rate is usually much lower. A CD locks your money for a set term and pays a higher rate, but you lose money if you withdraw early. Choose a CD if you have money you will not need, and a savings account if you want flexibility.