A certificate of deposit is a savings account where you lock up your money for a set time in exchange for a higher interest rate than a regular savings account

When you open a CD, you give a bank or credit union a lump sum of money—say $5,000—and agree not to touch it for a specific period. That period might be three months, six months, one year, or five years. In return, the bank pays you a fixed interest rate that is higher than what you would earn in a regular savings account. At the end of the term, you get your original money back plus all the interest it earned.

The trade-off is simple: you give up access to your cash for a while, and the bank rewards you with better interest. If you withdraw the money before the term ends, you pay an early withdrawal penalty—usually a few months' worth of interest. That penalty is why CDs work best for money you know you will not need soon.

Key Takeaways

  • You deposit a fixed amount of money for a fixed period and receive a fixed interest rate that does not change.
  • Your money and interest are insured by the FDIC (at banks) or NCUA (at credit unions) up to $250,000 per account.
  • Early withdrawal before the term ends triggers a penalty, usually several months of interest, so only use CD money you can afford to lock away.
  • CD rates vary by bank, term length, and deposit size, so comparing offers across institutions can add hundreds of dollars to your return.
  • When your CD matures, you can withdraw the money, open a new CD, or let it roll over automatically into another term at the current rate.

How interest rates and term length affect your return

The longer you lock your money away, the higher the interest rate usually is. A three-month CD might pay 4.5 percent, while a five-year CD at the same bank might pay 5.2 percent. The bank is willing to pay more because it gets to hold your money longer and lend it out at a profit.

The actual dollar amount you earn depends on three things: how much you deposit, what rate the bank offers, and how long the term is. A $10,000 deposit at 5 percent for one year earns $500. The same $10,000 at 5 percent for two years earns roughly $1,025 because you earn interest on your interest. Rates also shift with the broader economy—when the Federal Reserve raises rates, new CDs pay more; when it cuts rates, new CDs pay less.

Banks and credit unions set their own rates, so the same term length can pay very different amounts at different institutions. Checking rates across five or six banks before you commit can mean the difference between earning $300 and $500 on the same deposit.

What happens when your CD reaches maturity

When your term ends, the CD matures. You then have a few options. You can withdraw the full amount—principal plus interest—and use the money however you want. You can open a new CD at the same bank or a different one, locking in whatever the current rate is at that moment. Or you can do nothing, and many banks will automatically roll the money into a new CD at the current rate for the same term length.

That automatic rollover is important to watch. If rates have dropped since you opened your original CD, rolling over means you will earn less interest on the next term. If rates have risen, rolling over locks in a better rate. Some banks give you a grace period—usually seven to ten days—to decide what to do before the rollover happens automatically. Check your CD agreement or call the bank to confirm the rollover terms.

Early withdrawal penalties and when they apply

If you need the money before the term ends, you can withdraw it, but you will pay a penalty. The penalty is typically a set number of months of interest. A CD with a three-month penalty means you lose three months' worth of the interest you earned. On a $10,000 CD earning 5 percent annually, that penalty would be about $125.

In rare cases, the penalty can be large enough to eat into your principal—meaning you get back less than you deposited. This happens most often on longer-term CDs with high penalties. Before you open a CD, read the disclosure document and ask the bank directly what the penalty is. If you think there is any chance you will need the money within the term, a CD is not the right place for it.

Some banks offer "no-penalty CDs" that let you withdraw early without a penalty, but they pay lower interest rates to offset that flexibility. These are worth considering if you want the higher rate of a CD but need some access to your cash.

FDIC and NCUA insurance protection

Your CD is insured by the federal government up to $250,000 per account. If you open a CD at a bank, the Federal Deposit Insurance Corporation (FDIC) covers it. If you open one at a credit union, the National Credit Union Administration (NCUA) covers it. This means if the bank or credit union fails, you get your money back—principal and interest—up to that limit.

The $250,000 limit applies per depositor, per institution, per account type. If you have $100,000 in a CD and $150,000 in a savings account at the same bank, both are covered because they are different account types. But if you have two CDs at the same bank totaling $300,000, only $250,000 is insured. If you want to protect more than $250,000, open CDs at different banks.

Comparing CD rates and finding the best offer

CD rates change constantly and vary widely between institutions. A large national bank might offer 4.8 percent on a one-year CD, while an online bank offers 5.3 percent on the same term. Over one year, that 0.5 percent difference adds up to $50 per $10,000 deposited.

To find the best rate, check the websites of several banks and credit unions. Online banks and credit unions often pay higher rates than brick-and-mortar banks because they have lower overhead costs. Websites like Bankrate, DepositAccounts, and the FDIC's own rate search tool let you compare rates across many institutions at once. Write down the rate, term, minimum deposit, and early withdrawal penalty for each one before you decide.

Also check whether the bank requires a minimum deposit. Some CDs require $500, others $10,000 or more. A few online banks have no minimum. If you are working with a smaller amount, this can narrow your options.

CD ladders and how they can improve your flexibility

A CD ladder is a strategy where you open multiple CDs with different maturity dates instead of putting all your money into one CD. For example, you might open five one-year CDs, each with $2,000, but stagger the start dates so one matures every few months. As each one matures, you can withdraw the money, open a new CD, or use it for something else.

The advantage is flexibility without sacrificing the higher interest rate of a CD. Instead of locking all your money away for five years, you get access to a portion of it every few months. You also reduce the risk of locking in a low rate—if rates rise, you can reinvest the maturing CD at the new higher rate rather than waiting years for your next opportunity.

A ladder works best if you have at least $5,000 to $10,000 to split across multiple CDs. If you have less, the effort may not be worth it, and a single CD or a high-yield savings account might be simpler.

Frequently Asked Questions

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

Most CDs charge an early withdrawal penalty if you take money out before the term ends. Some banks offer no-penalty CDs that let you withdraw without a fee, but they pay lower interest rates. Check your CD agreement or ask the bank what the penalty is before you open the account.

What is the difference between a CD and a high-yield savings account?

A CD locks your money for a set term and pays a fixed rate, while a high-yield savings account lets you withdraw anytime and the rate can change. CDs usually pay more interest, but you lose access to your cash. High-yield savings accounts offer flexibility but lower returns.

Do I pay taxes on CD interest?

Yes. CD interest is taxable income in the year you earn it, even if you do not withdraw the money until the CD matures. 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 happens if the bank fails while I have a CD?

The FDIC or NCUA insures your CD up to $250,000, so you will get your principal and all earned interest back even if the bank closes. Make sure your bank is FDIC-insured or your credit union is NCUA-insured before you open an account.

Can I move a CD to a different bank without paying a penalty?

No. Moving a CD to another bank before it matures is treated as an early withdrawal, and you will pay the penalty. You can wait until the CD matures, then open a new one at a different bank without any penalty.