A CD is a savings account where you agree to leave money untouched for a set time in exchange for a higher interest rate
CD stands for certificate of deposit. You give a bank a lump sum of money — say $5,000 — and the bank agrees to pay you a fixed interest rate if you leave that money alone until a specific date. That date might be three months away, six months, one year, or five years. The longer you commit to leaving the money there, the higher the interest rate the bank typically offers.
The trade-off is simple: you cannot touch the money without a penalty. If you withdraw before the maturity date — the day your CD term ends — the bank charges you a fee, usually by subtracting it from your interest earnings or from the principal itself. That penalty is why CDs work best for money you know you will not need soon.
When the maturity date arrives, the bank returns your original deposit plus the interest you earned. At that point you can withdraw the money, move it to another account, or roll it into a new CD at whatever rate the bank is offering then.
Key Takeaways
- A CD locks your money in for a fixed term — typically three months to five years — in exchange for a may provide interest rate higher than a regular savings account.
- Early withdrawal triggers a penalty fee that reduces what you get back, so CDs work best for money you will not need during the term.
- The interest rate and term length vary by bank and by economic conditions; shopping around can mean hundreds of dollars in difference on a large deposit.
- When your CD matures, you receive your principal plus all earned interest, and you can then withdraw it, open a new CD, or move it elsewhere.
How the interest rate and term length work together
Banks set CD rates based on what the Federal Reserve is doing with short-term interest rates and what other banks are offering. In periods when the Fed keeps rates high, CD rates climb too. In periods when rates are low, CD rates drop. This means the rate you see today will not be the same rate available in three months or a year.
The term length — how long you commit to leaving the money in — also affects the rate. A three-month CD typically pays less than a one-year CD at the same bank, because the bank has your money for a shorter period. A five-year CD usually pays more than a one-year CD. However, this is not a hard rule; sometimes rates invert depending on what banks expect to happen to the economy.
You choose both the amount and the term when you open the CD. A $1,000 CD and a $50,000 CD at the same bank for the same term earn the same interest rate — the rate does not change based on how much you deposit. Some banks do offer different rates for very large deposits, but this is less common.
What happens if you need the money before maturity
Early withdrawal penalties vary widely by bank and by CD term. A typical penalty might be three months of interest, six months of interest, or a flat fee like $25. On a short-term CD like a three-month one, the penalty could wipe out most or all of the interest you earned. On a longer-term CD, the penalty is usually smaller relative to the total interest.
Before you open a CD, read the disclosure document the bank provides — it will state the exact penalty. Some banks allow you to withdraw a small amount without penalty, or they offer "no-penalty CDs" that let you withdraw early with little or no fee, though these pay lower interest rates to compensate.
If you withdraw early, the bank calculates the penalty and subtracts it from what you get back. If you earned $150 in interest and the penalty is $100, you receive your $5,000 principal plus $50 in interest. If the penalty exceeds your interest, you get back less than you put in.
Where to find CDs and how rates compare
Every bank and credit union offers CDs. Online banks, traditional brick-and-mortar banks, and credit unions all compete on rates. Online banks often pay higher rates than local branches because they have lower overhead costs. Rates also vary by term — the same bank might pay 4.5% on a one-year CD and 5.2% on a five-year CD.
To compare, visit the websites of banks you already use, then check online banks and credit unions you do not. Look at the rate, the term, and the penalty terms side by side. A difference of 0.5% on a $10,000 CD for one year means $50 more in your pocket. On a $50,000 CD, that same difference is $250.
Some banks offer promotional rates for new customers or for opening CDs during certain windows. These rates are real, but they are temporary — when the promotion ends, new CDs at that bank revert to standard rates.
What FDIC insurance means for your CD
Money in a CD at an FDIC-insured bank is protected up to $250,000 per depositor, per bank, per account type. This means if the bank fails, the federal government guarantees you get your principal and accrued interest back, up to that limit. Credit unions have similar protection through the NCUA (National Credit Union Administration).
If you have more than $250,000 to deposit, you can spread it across multiple banks to stay within the insurance limit on each one. For example, a $500,000 CD could be split into two $250,000 CDs at two different FDIC-insured banks, and both would be fully insured.
This insurance applies whether your CD matures in three months or five years. It also applies even if you withdraw early and pay a penalty — the insurance covers what you receive back.
CDs versus savings accounts and money market accounts
A regular savings account has no term and no penalty for withdrawal, but it pays a much lower interest rate — often 0.01% or less at traditional banks. You can withdraw whenever you want, which makes it useful for emergency funds, but you sacrifice interest earnings.
A money market account sits between a savings account and a CD. It typically pays more interest than a savings account but less than a CD. You can usually write checks or make a few withdrawals per month without penalty, but there are limits. Money market accounts work well if you need some access to your money but want better returns than a regular savings account.
A CD works best if you have money you will not need for several months or years and you want a may provide rate locked in. The tradeoff is that your money is not accessible without a penalty. Choose based on when you think you will need the money and how much interest matters to you.
How to open a CD and what to expect at maturity
Opening a CD takes minutes. You visit the bank's website or branch, choose the amount and term, and provide your account information. The bank transfers the money from your checking or savings account into the CD. Some banks require a minimum deposit — often $500 or $1,000, though some have no minimum.
Once the CD is open, you receive a confirmation showing the principal, the interest rate, the maturity date, and the early withdrawal penalty. Write down or save the maturity date. Most banks send a notice a week or two before maturity, but do not rely on that alone.
When the maturity date arrives, the bank automatically deposits your principal plus interest into your linked checking or savings account. You can then withdraw it, or if you want to keep the money earning interest, you can open a new CD at the current rate. Some banks have an automatic renewal feature that rolls your CD into a new one at the current rate if you do not act by the maturity date — check your disclosure to see if yours does.
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 deposit more money, you must open a separate CD. This is different from a savings account, where you can deposit whenever you want.
What if interest rates go up after I open my CD?
Your rate stays the same for the entire term. If you opened a one-year CD at 4.5% and rates climb to 5.5% three months later, you still earn 4.5%. This is the trade-off of locking in a rate — you are protected if rates fall, but you miss out if they rise. You can open a new CD at the higher rate when your current one matures.
Do I pay taxes on CD interest?
Yes. The interest you earn on a CD 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. This is true even if you do not withdraw the money.
Is there a difference between a CD at a bank and a CD at a credit union?
The mechanics are the same — you deposit money for a fixed term and earn interest. Credit unions often pay slightly higher rates than banks, and they use NCUA insurance instead of FDIC insurance, but the protection limit is the same: $250,000 per depositor per institution.
What happens if I need my money before the CD matures but do not want to pay the penalty?
You have limited options. Some banks offer no-penalty CDs, but they pay lower rates to offset the flexibility. Otherwise, you either pay the penalty or wait until maturity. If a true emergency arises, paying the penalty may still be worth it — compare the penalty cost to what you would pay in overdraft fees or credit card interest if you borrowed the money instead.