A certificate of deposit locks your money away for a set time in exchange for a higher interest rate

A certificate of deposit, or CD, is a savings product where you give a bank a lump sum of money and agree not to touch it for a fixed period—usually anywhere from three months to five years. In return, the bank pays you a higher interest rate than you would get in a regular savings account. The bank knows exactly when you'll need the money back, so it can lend that cash out with confidence, and it passes some of that benefit to you through the higher rate.

When your CD reaches its maturity date—the end of the agreed-upon period—the bank returns your original deposit plus all the interest you've earned. You then decide what to do with it: withdraw the money, open a new CD, or move it elsewhere. If you withdraw before the maturity date, you'll pay an early withdrawal penalty, which is a fee that reduces how much you get back.

CDs are straightforward because there are no surprises once you've opened one. The interest rate is locked in from day one. You won't see it go up or down based on market conditions. You know exactly how much you'll have at the end, assuming you don't withdraw early.

Key Takeaways

  • You deposit a fixed amount of money and agree not to withdraw it until a specific maturity date, typically three months to five years away.
  • The bank pays a higher interest rate on a CD than on a regular savings account because it knows when the money will be returned.
  • If you withdraw your money before the maturity date, you pay an early withdrawal penalty that reduces your total return.
  • When the CD matures, you receive your original deposit plus all accumulated interest, and you can then withdraw it or open a new CD.
  • The interest rate on a CD is fixed for the entire term, so your earnings won't change even if market rates rise or fall.

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 typically offer you. A three-month CD might pay 4.5 percent annually, while a five-year CD from the same bank might pay 5.2 percent. The bank is willing to pay more because it gets to hold and use your money for a longer stretch.

The interest rate is expressed as an annual percentage rate, or APY. This is the total percentage return you'll earn over one year. If you have a CD with a shorter term—say, six months—the bank will calculate your interest based on that shorter period, but the APY still tells you what you'd earn if the rate stayed the same for a full year.

You don't have to choose between a long term and a high rate. Some people open a series of shorter CDs instead of one long one, which gives them more flexibility to access their money sooner. Others accept a lower rate on a shorter CD because they know they'll need the cash in a few months. It depends on your situation and how long you can actually afford to leave the money untouched.

What happens when interest is added to your CD

Interest on a CD is usually added to your account monthly or quarterly, depending on the bank's terms. You don't have to do anything—the bank calculates it automatically and deposits it into the CD account. Some banks let you withdraw the interest as it accrues, while others require you to leave it in the CD where it earns interest on top of interest, a process called compounding.

If you withdraw the interest before the CD matures, that withdrawal doesn't trigger the early withdrawal penalty. The penalty only applies to withdrawals of your original principal—the money you first deposited. So if you need some cash and your CD is earning interest monthly, you could take the interest payments without losing money to a penalty, though you'd lose the compounding benefit.

Most people leave the interest in the CD to compound, because that's how you maximize what you earn. The longer the term, the more dramatic the compounding effect becomes, especially at higher interest rates.

Early withdrawal penalties and why they exist

If you need your money before the maturity date, you can withdraw it—but the bank will charge you a penalty. The penalty amount varies by bank and by the term of the CD. A three-month CD might have a penalty of one month's interest, while a five-year CD might have a penalty of six months' interest or more. Some banks calculate the penalty as a flat dollar amount instead.

The penalty comes out of your earnings first. If you've earned $200 in interest and the penalty is $150, you'd get back your original deposit plus $50. If the penalty exceeds your interest earnings, it comes out of your principal, meaning you'd get back less than you originally deposited.

Banks charge these penalties because they count on having your money for the full term. When you withdraw early, they lose the use of that cash and may have to pay a higher rate to attract new deposits to replace it. The penalty compensates them for that disruption. Before you open a CD, check what the early withdrawal penalty is—it's part of the contract, and you should know the cost of changing your mind.

When your CD matures and what your options are

As your maturity date approaches, the bank will send you a notice—usually 10 to 30 days before—telling you what's about to happen. At that point, you have three main choices: withdraw the money, let it roll over into a new CD, or move it to a different account or bank.

If you do nothing, many banks will automatically roll your CD into a new one with the same term at whatever the current interest rate is. This is called an automatic renewal. The new rate might be higher or lower than what you were earning. If you don't want to renew, you need to contact the bank before the maturity date and tell them to let the CD mature without rolling over. Then, on the maturity date, your money will sit in a regular savings account or checking account until you decide what to do with it.

Some people use the maturity date as a checkpoint: they look at current CD rates across different banks and decide whether to stay put or move their money somewhere that's paying more. There's no penalty for withdrawing your money once the CD has matured, so this is the ideal time to shop around if you want to.

How CDs compare to regular savings accounts and money market accounts

The main trade-off with a CD is flexibility for rate. A regular savings account lets you withdraw money whenever you want without penalty, but the interest rate is usually much lower—often less than 1 percent annually. A CD locks up your money but pays significantly more, sometimes 4 to 5 percent or higher depending on current market conditions and the term you choose.

A money market account sits in the middle. It typically pays more than a regular savings account but less than a CD, and it usually lets you make a limited number of withdrawals per month without penalty. If you think you might need access to your money but want a better rate than a savings account offers, a money market account might be worth considering.

The right choice depends on when you'll actually need the money. If you have cash you won't touch for at least a year, a CD is almost always the better option because the rate difference is substantial. If you might need it sooner, the penalty risk makes a savings account or money market account safer.

How FDIC insurance protects your CD

When you open a CD at a bank that's insured by the FDIC (Federal Deposit Insurance Corporation), your deposit is protected up to $250,000 per account owner per bank. This means if the bank fails, the FDIC will return your money—both your principal and any interest you've earned—up to that limit.

This protection applies to the CD itself, not to the interest rate or the terms. If a bank fails while your CD is still locked up, you won't be forced to keep the money there. The FDIC will return it to you, and you can move it elsewhere without penalty. The insurance covers the full amount you deposited plus all interest accrued up to the moment of the bank's failure.

If you have more than $250,000 to invest in CDs, you can spread it across multiple banks to keep everything insured. For example, you could open a $250,000 CD at Bank A and another at Bank B, and both would be fully protected. The FDIC website has a tool that lets you check whether a specific bank is insured.

Frequently Asked Questions

Can I withdraw money from a CD before it matures?

Yes, you can withdraw at any time, but you'll pay an early withdrawal penalty. The penalty is typically a certain number of months' worth of interest, and it comes out of your earnings first. If the penalty exceeds what you've earned, the rest comes from your original deposit, so you could end up with less than you put in.

What happens if I don't withdraw my money when the CD matures?

Most banks automatically roll your CD into a new one with the same term at the current interest rate. If you don't want this, you need to contact the bank before the maturity date and request that it not renew. Once the CD matures without renewing, your money will sit in a regular account until you tell the bank what to do with it.

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

Yes. Once you open a CD, the interest rate is locked in for the entire term. It won't change if market rates go up or down. This is one of the main advantages of a CD—you know exactly what you'll earn from day one.

How is CD interest taxed?

CD interest is taxed as ordinary 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. If you're in a high tax bracket, this is worth keeping in mind when deciding between a CD and other savings options.

What's the difference between a CD and a savings account?

A savings account lets you withdraw money anytime without penalty but pays a much lower interest rate. A CD locks your money for a set period and pays significantly more interest, but you'll pay a penalty if you withdraw early. Choose a CD if you won't need the money for at least several months; choose a savings account if you need flexibility.