What a CD is and how your money moves
A certificate of deposit (CD) is a bank account where you agree to leave a fixed amount of money untouched for a set period of time—usually three months to five years—in exchange for a higher interest rate than a regular savings account. The bank pays you interest on that money, and you get the full amount back when the term ends.
The mechanics are straightforward: you deposit money, the bank holds it, and on a schedule you choose at the start, the bank pays you interest. When your term is up, the bank returns your original deposit plus all the interest earned. If you need the money before the term ends, most banks charge a early withdrawal penalty—a fee that reduces what you get back. The penalty amount varies by bank and by how long your CD term is.
CDs are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per depositor per bank, the same as a regular savings account. That means if the bank fails, your money is protected up to that limit.
Key Takeaways
- A CD locks your money away for a set term (three months to five years) in exchange for a fixed interest rate that is usually higher than a savings account.
- You cannot withdraw the money before the term ends without paying an early withdrawal penalty, which the bank deducts from your balance.
- The interest rate is set when you open the CD and does not change, even if the bank's rates go up or down.
- CDs are FDIC-insured up to $250,000, so your deposit is protected if the bank fails.
- When your term ends, the bank automatically renews the CD at the current rate unless you tell it not to, or you can withdraw the money penalty-free.
How interest rates and terms work together
The longer you agree to lock your money away, the higher the interest rate the bank offers you. A three-month CD might pay 4.5 percent annually, while a five-year CD at the same bank might pay 5.2 percent. The bank uses your money during that time, so it pays you more for tying it up longer.
The interest rate is fixed—it does not change during your term, even if the bank raises or lowers its rates. If you open a two-year CD at 5 percent and the bank drops its rate to 3 percent six months later, you still earn 5 percent for the full two years. That protection cuts both ways: if rates rise to 6 percent, you are still locked in at 5 percent.
Interest is usually compounded daily or monthly, meaning the bank calculates interest on your original deposit plus any interest already earned. The more often it compounds, the slightly more you earn. When your term ends, the bank pays you the full amount—principal plus all accrued interest—unless you tell it otherwise.
Early withdrawal penalties and what they cost
If you withdraw money before your CD matures, the bank charges a penalty. The penalty is typically a certain number of months' worth of interest. A CD with a three-month penalty means you lose three months of interest; a CD with a six-month penalty costs you six months of interest. Some banks use a percentage of the principal instead, though that is less common.
The penalty is deducted from what the bank pays you. If you have a $10,000 CD earning 5 percent annually and you withdraw after six months, you have earned about $250 in interest. If the penalty is six months of interest, the bank deducts $250, and you get back your $10,000 plus zero interest. If you withdraw before you have earned enough interest to cover the penalty, the bank takes the difference from your principal.
Some banks offer no-penalty CDs, which let you withdraw without a fee before the term ends. These typically pay a lower interest rate than standard CDs because the bank cannot count on keeping your money for the full term. They are useful if you think you might need the money but want a rate higher than savings.
What happens when your CD matures
When your term ends, the bank sends you a notice—usually 10 to 14 days before maturity—telling you what happens next. You have a window, typically 7 to 10 days after maturity, to decide what to do with the money. Most banks automatically renew your CD at the current rate if you do nothing, which means your money stays locked up for another full term.
If you do not want to renew, you can withdraw the money penalty-free during that window. Some banks let you move the money to another account at the same bank, or you can take it out entirely. If you miss the window and the bank has already renewed, you are locked in again, though you can still withdraw with a penalty if you need the money urgently.
The renewal rate is whatever the bank is offering for that term length on the day your CD matures. If rates have fallen, your new rate will be lower. If rates have risen, your new rate will be higher. This is why it matters to pay attention to the maturity notice—you can shop around and move your money to a different bank if another bank is offering a better rate.
CD ladders and how to use them
A CD ladder is a strategy where you open multiple CDs with different maturity dates so that money becomes available at regular intervals. For example, you might open five $2,000 CDs with one-year terms, but stagger them so one matures every few months. As each one matures, you can withdraw it, renew it, or move it to a new CD.
Laddering solves two problems at once: you lock in higher rates by committing to longer terms, but you are not completely without access to your money. Every few months, a portion becomes available without penalty. If interest rates rise, you can reinvest the maturing CD at the new higher rate instead of being stuck at an old rate for years.
A ladder works best when you have a lump sum to invest and you are comfortable leaving most of it untouched. If you need regular access to money or expect to need a large amount suddenly, a ladder might not be the right tool.
CDs versus savings accounts and money market accounts
A CD pays more interest than a regular savings account because you give up access to your money. A savings account lets you withdraw anytime without penalty, but the interest rate is lower—often 0.01 to 0.5 percent annually, depending on the bank. A CD might pay 4 to 5.5 percent for the same bank, depending on the term.
A money market account sits between the two. It pays more than a savings account but usually less than a CD, and it lets you withdraw money without penalty, though some banks limit how many withdrawals you can make per month. If you want higher returns and do not need the money for a specific time period, a money market account offers more flexibility than a CD.
The choice depends on when you will need the money. If you know you will not touch it for two years, a two-year CD locks in a rate and pays more. If you might need it sooner, a savings account or money market account keeps your options open, even if the rate is lower.
Where to open a CD and how rates compare
You can open a CD at any bank or credit union. Online banks typically offer higher rates than brick-and-mortar banks because they have lower overhead costs. A local bank might pay 4.5 percent on a one-year CD while an online bank pays 5.2 percent for the same term. Over a year, that difference adds up.
To compare rates, check the bank's website or use a rate-comparison tool that lists current CD rates across multiple institutions. Pay attention to the term length—a five-year CD at one bank might pay more than a one-year CD at another, but you cannot access the money as quickly. Also check the early withdrawal penalty before you open the account, because a slightly higher rate is not worth it if the penalty is steep.
When you open a CD, you will need to provide identification, your Social Security number, and proof of address, the same as opening any bank account. You can usually open a CD online in minutes and fund it by transferring money from another account.
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 for the entire term. If you want to invest more money, you have to open a separate CD. Some banks let you open multiple CDs at once with different amounts.
What happens to my CD if the bank fails?
The FDIC insures your CD up to $250,000. If the bank fails, the FDIC pays you your full deposit plus all accrued interest, up to that limit. You do not lose money because of a bank failure.
Is the interest I earn on a CD taxable?
Yes. The interest you earn on a CD is taxable income in the year it is paid or credited to your account. 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.
Can I move a CD to a different bank without a penalty?
No. If you withdraw before maturity, you pay the early withdrawal penalty, even if you are moving the money to another bank's CD. You can avoid the penalty only by waiting until the term ends, then opening a new CD at a different bank.
What is the shortest CD term available?
Most banks offer three-month CDs as the shortest term, though some offer one-month or even weekly CDs. Shorter terms pay lower rates because the bank has less time to use your money. Longer terms always pay more.