A Certificate of Deposit is a savings account where you agree to leave money untouched for a set time in exchange for a higher interest rate

A Certificate of Deposit, or CD, is a contract between you and a bank or credit union. You give them a lump sum of money — say $1,000 or $5,000 — and promise not to touch it for a specific period. In return, they pay you a fixed interest rate, usually higher than what a regular savings account offers. When the time is up (called the maturity date), you get your original money back plus the interest earned.

The trade-off is straightforward: you lock your money away, and the bank rewards you for that commitment. If you need the money before the maturity date, most banks charge a early withdrawal penalty — typically a few months' worth of interest. That penalty is the cost of breaking the agreement early.

CDs come in different lengths. Common terms are 3 months, 6 months, 1 year, 2 years, 3 years, and 5 years. The longer you lock your money away, the higher the interest rate usually is. A 5-year CD will pay more than a 1-year CD at the same bank.

Key Takeaways

  • You deposit a fixed amount of money and agree not to withdraw it until a specific maturity date in exchange for a may provide interest rate.
  • Interest rates on CDs are typically higher than regular savings accounts, and longer terms usually pay more than shorter ones.
  • Withdrawing money before the maturity date triggers an early withdrawal penalty, which is usually several months of interest.
  • Your money is insured by the FDIC (at banks) or NCUA (at credit unions) up to $250,000, so your principal is protected even if the institution fails.
  • When a CD matures, you can withdraw the money, move it to a new CD, or let it roll over into a new CD at the current rate offered by that bank.

How much interest you earn depends on the rate, the term, and how much you deposit

The interest rate a bank offers on a CD changes based on what the Federal Reserve is doing with short-term interest rates. When the Fed raises rates, CD rates go up. When the Fed lowers rates, CD rates fall. This means the rate you see today may not be the rate next month.

The amount you earn is straightforward math. If you deposit $5,000 in a 1-year CD paying 4.5% annual interest, you will earn $225 over that year (before any taxes). A 2-year CD at the same rate would earn $450 total. The longer the term, the more interest accumulates, assuming the rate stays the same.

Different banks offer different rates on the same CD term. A large national bank might offer 3.5% on a 1-year CD, while an online bank offers 4.8% on the same term. Shopping around matters — that 1.3% difference adds up quickly on larger deposits. Websites that compare CD rates across banks can help you see what is available.

What happens when your CD reaches its maturity date

When the maturity date arrives, you have choices. You can withdraw all the money and interest with no penalty. You can move the money to a different bank or into a different type of account. Or you can let it roll over into a new CD at that same bank.

If you do nothing, most banks automatically roll your CD into a new one at the current rate they are offering. This happens during a grace period, usually 7 to 10 days after maturity. If rates have dropped since you opened your original CD, your new rate will be lower. If rates have risen, your new rate will be higher. You can withdraw the money penalty-free during this grace period if you do not want the new CD.

Some people use CDs as a ladder: they buy multiple CDs with different maturity dates (one maturing in 1 year, one in 2 years, one in 3 years). As each one matures, they can reinvest it at the current rate or use the money. This spreads out when your money becomes available and lets you take advantage of rate changes over time.

Early withdrawal penalties and when they explore

If you withdraw money from a CD before the maturity date, the bank charges a penalty. The size of the penalty varies by bank and by CD term. A 3-month CD might have a penalty of 1 month's interest. A 5-year CD might have a penalty of 6 months' interest or more. Always check the terms before you open a CD — the penalty amount is in the disclosure document the bank gives you.

The penalty is deducted from your interest, not from your principal. If you have earned $100 in interest and the penalty is $75, you get back your original deposit plus $25. If the penalty is larger than the interest you have earned, you lose some of your principal — you get back less money than you deposited.

Some banks offer no-penalty CDs, where you can withdraw your money early without a penalty. These exist, but they typically pay lower interest rates than regular CDs. You are trading a higher rate for the flexibility to access your money.

FDIC insurance protects your money if the bank fails

Money in a CD is insured by the FDIC (Federal Deposit Insurance Corporation) if you open it at a bank, or by the NCUA (National Credit Union Administration) if you open it at a credit union. This insurance covers up to $250,000 per depositor, per bank, per account type.

This means if the bank goes out of business, the government backs your money up to that limit. You will not lose your principal or the interest you have earned. This protection applies whether your money is in a CD, a savings account, or a checking account at the same institution.

If you have more than $250,000 to deposit, you can spread it across multiple banks to keep all of it insured. For example, $250,000 at Bank A and $250,000 at Bank B are both fully covered. The FDIC website has a tool that shows you exactly how much of your money is insured at any given bank.

CDs versus savings accounts and money market accounts

A regular savings account has no maturity date — you can withdraw money whenever you want. But the interest rate is usually much lower than a CD, often less than 1% annually. You get flexibility, but you earn less.

A money market account sits between a savings account and a CD. It pays higher interest than a savings account (sometimes close to CD rates), but you can still withdraw money without a penalty. The catch is that money market accounts often have limits on how many withdrawals you can make per month, and they may require a higher minimum balance.

A CD locks your rate in for the entire term. If you open a 2-year CD at 4.5%, you earn 4.5% every year for 2 years, even if rates drop to 2%. That certainty is valuable if you want to know exactly how much you will have at the end. But if rates rise, you are stuck with the lower rate unless you pay the early withdrawal penalty.

Who should consider opening a CD

CDs work well if you have money you will not need for several months or years and you want a may provide return. They are popular for saving toward a specific goal — a down payment on a house, a car purchase, or a large expense you know is coming. Because the rate is fixed and the FDIC insures your money, there is no guessing or risk.

CDs are less useful if you might need the money soon or if you want flexibility. The early withdrawal penalty can wipe out your gains, and you lose the ability to move your money if a better opportunity comes along. They are also less attractive when interest rates are falling — you lock in a rate that may soon look low.

Some people use CDs as part of a larger strategy. They might keep 3 to 6 months of expenses in a high-yield savings account for emergencies, and put money they will not need for 2 or more years into CDs to earn a higher rate. This balances safety, access, and return.

Frequently Asked Questions

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

No. A CD is a fixed contract for a specific amount. Once you open it, you cannot deposit additional money into that same CD. If you want to invest more, you would need to open a separate CD. Some banks let you open multiple CDs at once with different amounts.

What happens to my CD if interest rates drop after I open it?

Your rate stays the same for the entire term. That is the point of a CD — the rate is locked in. If rates drop, you benefit because you are earning more than new CDs would pay. If rates rise, you are locked into the lower rate unless you withdraw early and pay the penalty.

Do I have to pay taxes on CD interest?

Yes. CD interest is taxable income. The bank will send you a 1099-INT form at the end of the year showing how much interest you earned, and you report that on your tax return. The interest is taxed as ordinary income at your regular tax rate.

Can I open a CD with a credit union instead of a bank?

Yes. Credit unions offer CDs with similar terms and rates to banks. The main difference is that credit union CDs are insured by the NCUA instead of the FDIC, but the coverage limit is the same — $250,000 per depositor per institution.

What is a bump-up CD?

A bump-up CD lets you request one rate increase during the term if rates rise. If you open a 2-year CD and rates go up after 6 months, you can ask the bank to bump your rate up to the new higher rate. Not all banks offer this, and the bump-up is usually limited to one per CD.