What a Certificate of Deposit Is

A certificate of deposit (CD) is a savings account where you agree to leave your money untouched for a set period of time in exchange for a higher interest rate than a regular savings account. You deposit a lump sum, the bank holds it, and at the end of the term—which might be three months, one year, five years, or longer—you get your money back plus the interest earned.

The trade-off is straightforward: you give up access to your cash for a defined period. If you withdraw the money before the term ends, you pay a penalty, usually a few months' worth of interest. The bank knows exactly how long it will hold your money, so it can offer you a better rate than it would for money you might pull out at any time.

Key Takeaways

  • You deposit a fixed amount of money for a fixed period, and the bank pays you a set interest rate that is higher than a regular savings account.
  • The interest rate is locked in when you open the CD and does not change, even if market rates rise or fall.
  • Withdrawing money before the term ends triggers a penalty, typically several months of interest, so CDs work best for money you will not need soon.
  • CD terms range from a few months to several years, and longer terms usually pay higher rates.
  • Your money is insured by the FDIC up to $250,000 per bank, making CDs one of the safest places to put savings.

How Interest Rates and Terms Work

When you open a CD, the bank tells you the annual percentage yield (APY)—the total interest you will earn over one year, expressed as a percentage. A CD paying 4.5% APY for one year means that if you deposit $10,000, you will have $10,450 at the end of the year (before taxes). The rate is locked in for the entire term, so you know exactly what you will earn.

Longer terms almost always pay higher rates. A three-month CD might pay 4.0% APY, while a five-year CD from the same bank might pay 5.0% APY. The bank is willing to pay more because it knows your money will stay longer. However, this also means you are taking on more risk: if interest rates rise sharply, you will be stuck earning the lower rate you locked in.

Interest can be paid to you monthly, quarterly, or at maturity. Some banks let you choose. If interest is paid during the term, you can usually take it as cash or have it added back into the CD to earn interest on top of interest (called compounding).

Early Withdrawal Penalties and What They Cost

If you need your money before the CD matures, you can withdraw it, but you will owe a penalty. The penalty is usually expressed as a number of months of interest—for example, "180 days of interest" or "six months of interest." On a $10,000 CD earning 4.5% APY with a 180-day penalty, you would lose about $225 in interest, leaving you with $10,225 instead of the full amount you would have earned.

Some banks charge a flat dollar amount instead, or a percentage of the deposit. Always ask what the penalty is before you open a CD. A few banks offer "no-penalty" CDs that let you withdraw without a fee, but they pay lower interest rates to offset that flexibility. These make sense only if you are genuinely uncertain whether you will need the money.

The penalty is deducted from your interest earnings first. If you withdraw so early that the penalty exceeds the interest you have earned, the bank deducts the remainder from your principal—the original amount you deposited.

CD Laddering: A Strategy for Staying Flexible

One way to balance higher CD rates with the need for access to cash is CD laddering. Instead of putting all your money into one five-year CD, you split it into five one-year CDs. Each year, one CD matures and you can withdraw the money, reinvest it in a new five-year CD, or move it elsewhere. This way, you get rates closer to the longer-term rate while having some money available every year.

For example, if you have $50,000, you might buy five $10,000 CDs with terms of one, two, three, four, and five years. In year one, the one-year CD matures. You can take the money, or roll it into a new five-year CD. In year two, the two-year CD matures, and so on. You always have some liquidity without paying early withdrawal penalties.

FDIC Insurance and Safety

Money in a CD is insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per depositor, per bank. This means if the bank fails, the government guarantees you will get your money back up to that limit. This protection applies whether the CD is in your name alone, jointly owned, or held in a retirement account—each category has its own $250,000 limit.

If you have more than $250,000 to invest in CDs, you can spread it across multiple banks to stay within the insurance limit at each one. For example, $500,000 in CDs at two different banks would be fully insured. The FDIC website has a tool to help you calculate your coverage.

When a CD Makes Sense for Your Savings

A CD is a good choice if you have money you will not need for a known period—a down payment you are saving for in three years, a vacation fund for next summer, or an emergency fund you want to earn more interest on. The locked-in rate protects you from having to worry about where to put the money, and the FDIC insurance means there is no risk of losing the principal.

CDs are less useful if you might need the money unexpectedly, because the early withdrawal penalty will eat into your gains. They are also less attractive when interest rates are rising, because you will be locked into a lower rate. In a falling-rate environment, a CD locks in a higher rate before rates drop further, which is an advantage.

Compare CD rates across banks before you open one. Online banks often pay higher rates than brick-and-mortar banks because they have lower overhead. Rates change frequently, so check current offerings from several banks to find the best rate for the term you want.

Frequently Asked Questions

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

No. A CD is a fixed deposit—you choose the amount when you open it, and that amount stays the same until maturity. If you want to invest more money, you must open a separate CD. Some banks let you open multiple CDs at once with different terms or amounts.

What happens when my CD reaches maturity?

When the term ends, the bank notifies you and gives you a window (usually 7 to 10 days) to decide what to do. You can withdraw the money, open a new CD at the current rate, or move it to another account. If you do nothing, many banks automatically renew the CD at the current rate for the same term, so check your options before the important date.

Are CDs taxed?

Yes. The interest you earn on a CD is taxable income in the year you earn it, even if you do not withdraw the money. The bank will send you a 1099-INT form at tax time showing how much interest you earned. If the CD is in a retirement account like an IRA, the interest is not taxed until you withdraw from the account.

Can I buy a CD through a brokerage?

Yes. Brokerages and investment firms sell CDs issued by banks, and they often have access to higher rates than you can find directly. These CDs are still FDIC-insured. However, if you sell a brokered CD before maturity on the secondary market, you may get more or less than you paid, depending on how interest rates have moved.

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

A savings account lets you withdraw money anytime without penalty, but it pays a lower interest rate. A CD locks your money away for a set term and pays a higher rate, but you lose money if you withdraw early. Choose a savings account if you need flexibility; choose a CD if you have money you will not touch for months or years.