What a CD is and how the money moves

A certificate of deposit (CD) is an account where you give the bank a sum of money for a fixed period—typically three months to five years—in exchange for a may provide interest rate. The bank pays you that rate on top of your deposit, and you get both back when the term ends. Unlike a savings account, where you can withdraw money anytime, a CD locks your money away. If you take it out early, the bank charges you a penalty, usually by subtracting it from your interest earnings or principal.

The money itself stays in the bank's vault or in their lending operations—the same way it does with any deposit. You don't own stocks or bonds; you own a contract that says the bank owes you your principal plus interest on a specific date. That date is called the maturity date.

When the CD matures, the bank automatically returns your money. Most banks will either deposit it into a linked checking or savings account, or roll it into a new CD at whatever rate they're offering that day. You can usually change this instruction before maturity, so you're not forced to renew.

Key Takeaways

  • You deposit a fixed amount of money for a set term (three months to five years), and the bank pays you a may provide interest rate that does not change.
  • Your money is locked until the maturity date; withdrawing early triggers a penalty that typically erases some or all of your interest.
  • The interest rate on a CD is almost always higher than a savings account rate because you are giving up access to your cash.
  • When the CD matures, the bank returns your principal plus interest, usually by depositing it into another account or rolling it into a new CD.
  • CDs are FDIC-insured up to $250,000 per depositor per bank, so your money is protected even if the bank fails.

How interest rates and terms work

The rate you receive depends on three things: the current market, the length of the term, and the bank. Longer terms usually pay higher rates because the bank gets to use your money for longer. A five-year CD will typically pay more than a three-month CD. But rates change constantly—if you open a CD today at 4.5%, and rates drop to 3% next month, you keep your 4.5% for the full term. That's the may provide.

Interest compounds on most CDs, meaning the bank adds earned interest back into the account, and then pays interest on that interest. How often it compounds—daily, monthly, quarterly—affects how much you end up with. A CD that compounds daily will earn slightly more than one that compounds monthly, even at the same stated rate. The bank discloses this in the CD agreement, usually as the annual percentage yield (APY), which already factors in compounding.

You can open a CD at any bank, credit union, or online bank. Online banks typically offer higher rates because they have lower overhead costs. A brick-and-mortar bank might offer 4.0% APY on a one-year CD, while an online bank offers 4.8% on the same term. The difference adds up if you're depositing thousands of dollars.

What happens if you need the money early

Most CDs charge an early withdrawal penalty if you take money out before the maturity date. The penalty is usually stated as a number of months of interest. For example, a CD might have a three-month penalty, meaning if you withdraw early, the bank subtracts three months' worth of interest from what you get back. If you've only earned two months of interest so far, you lose money—the bank takes the third month from your principal.

Some banks offer no-penalty CDs, which let you withdraw without a penalty, but they pay lower rates to offset that flexibility. A no-penalty CD might pay 3.5% while a standard CD pays 4.5%. You trade rate for access.

Before opening any CD, read the disclosure document to find the exact penalty amount. It's usually a few months of interest, but some banks charge more. If there's any chance you'll need the money, a no-penalty CD or a shorter-term CD (like three months) is safer than locking in a five-year term and risking a large penalty.

FDIC insurance and what protects your money

CDs held at FDIC-insured banks are covered by FDIC deposit insurance up to $250,000 per depositor per bank. This means if the bank fails, the federal government guarantees you'll get your money back, up to that limit. You don't have to do anything to activate this protection—it's automatic.

The $250,000 limit applies per bank, not per CD. If you have three CDs totaling $300,000 at the same bank, only $250,000 is insured. If you want to insure more than $250,000, open CDs at different banks. Online banks are FDIC-insured just like brick-and-mortar banks, so the protection is the same.

Credit unions offer similar protection through the National Credit Union Administration (NCUA), also up to $250,000 per member per institution. Before opening a CD anywhere, confirm the institution is FDIC- or NCUA-insured by checking the agency's website or asking the bank directly.

How CD laddering spreads out your access

If you want to lock in higher rates but also need regular access to some of your money, you can use a strategy called CD laddering. You open multiple CDs with different maturity dates—for example, one that matures in one year, one in two years, one in three years, and one in four years. Each year, one CD matures and you can withdraw that money or roll it into a new four-year CD.

This approach gives you the higher rates of longer-term CDs while letting you access a portion of your money every year without penalty. If you have $10,000, you might put $2,500 into each of four CDs with staggered terms. In year one, $2,500 matures. In year two, another $2,500 matures, and so on.

Laddering works best when rates are stable or rising. If rates are falling, you might regret locking in longer terms. If rates are rising, you'll wish you had shorter terms so you could reinvest at higher rates sooner. It's a middle-ground strategy for people who want both safety and some flexibility.

When a CD makes sense versus other options

A CD is useful if you have money you won't need for several months or years and you want a may provide return. The rate is fixed, so you know exactly what you'll have at maturity. This is different from a savings account, where the rate can drop anytime, or the stock market, where the value fluctuates.

CDs make less sense if you might need the money soon, because the early withdrawal penalty can wipe out your gains. They also make less sense if inflation is high and the CD rate is low—you might lose purchasing power even though the dollar amount grows. A CD paying 2% when inflation is 4% means your money is worth less in real terms, even though the bank paid you interest.

Compare CD rates across banks before committing. A difference of 0.5% APY on a $10,000 CD over one year is $50. Over five years, that same difference compounds to roughly $260 more. Online banks almost always beat local banks on rate, so check them first.

What happens at maturity and renewal

On the maturity date, the bank stops paying interest. Your principal and all earned interest sit in the CD account, but no new interest accrues. Most banks automatically roll the money into a new CD at the current rate unless you tell them otherwise. This happens within a few days of maturity.

If you don't want to renew, contact the bank before the maturity date and request that the funds be transferred to your checking or savings account instead. Some banks give you a grace period—usually five to ten days after maturity—to change your instructions without penalty. After that window closes, if the money has been rolled into a new CD and you want out, you'll pay the early withdrawal penalty.

Check your CD maturity date on your statement or online account. Set a calendar reminder a week before so you have time to decide whether to renew, withdraw, or move the money elsewhere. Banks don't always send notices, so it's your responsibility to track the date.

Frequently Asked Questions

Can I add more 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. You cannot add to it or withdraw from it without triggering the early withdrawal penalty. If you want to invest more money, you open a separate CD.

What's the difference between a CD and a money market account?

A money market account lets you withdraw money anytime without penalty, but the interest rate can change. A CD locks in a fixed rate for a set term but charges a penalty if you withdraw early. Money market accounts are more flexible; CDs pay higher rates because you give up flexibility.

Do I pay taxes on CD interest?

Yes. The interest you earn on a CD is taxable income in the year you earn it, even if you don't withdraw the money. The bank will send you a 1099-INT form at tax time showing how much interest you earned. You report this on your tax return.

What if interest rates rise after I open my CD?

Your rate stays the same for the full term. If rates rise, you're locked into the lower rate you agreed to. This is why some people use CD laddering—it lets you reinvest portions of your money at higher rates as CDs mature, rather than locking everything in at once.

Is there a minimum deposit to open a CD?

Most banks require a minimum deposit, typically $500 to $2,500, though some online banks have no minimum. Check the bank's website or call to confirm the minimum before you apply. Some banks offer lower minimums for certain terms or account types.