A CD is a savings account where you lock up your money for a set time in exchange for a higher interest rate
A certificate of deposit (CD) is an agreement between you and a bank or credit union. You give them a lump sum of money, they promise to hold it untouched for a specific period—anywhere from three months to five years—and in return they pay you a fixed interest rate that's higher than what you'd get in a regular savings account. When the term ends, you get your original money back plus the interest earned.
The trade-off is simple: you lose access to that money for the duration. If you withdraw before the term is up, the bank charges you a penalty, usually a few months' worth of interest. This penalty varies by bank and by CD term length, so you need to know the exact amount before you open one.
CDs are insured by the FDIC (Federal Deposit Insurance Corporation) up to $250,000 per account holder per bank, which means your money is protected even if the bank fails. This makes them one of the safest places to put cash that you won't need immediately.
Key Takeaways
- A CD locks your money away for a fixed term—three months to five years—in exchange for a may provide interest rate higher than a savings account.
- You cannot withdraw the money without paying a penalty, usually several months of interest, so only put in what you truly won't need.
- Interest rates on CDs are fixed when you open the account and do not change, even if the bank's rates drop or rise later.
- Your CD is FDIC insured up to $250,000, so your principal and earned interest are protected if the bank fails.
- When your CD matures, you have a short window (usually 7 to 10 days) to decide whether to withdraw the money, renew it, or move it elsewhere.
How the interest rate and term length work together
The longer you lock your money away, the higher the interest rate the bank will offer you. A three-month CD might pay 4.5%, while a five-year CD at the same bank might pay 5.2%. The bank is paying you more because they get to use your money for longer without you being able to pull it out.
Your interest rate is fixed the moment you open the CD. If rates drop the next day, you keep your original rate. If rates climb, you're stuck with the lower one. This is why timing matters—if you think rates are about to fall, locking in now protects you. If you think they're about to rise, you might wait.
Interest compounds either daily, monthly, or quarterly depending on the bank's terms. More frequent compounding means slightly more money in your pocket at maturity, though the difference is usually small on shorter terms.
What happens when your CD reaches maturity
When the term ends, your CD reaches maturity. The bank sends you a notice, usually 7 to 10 days before the date, telling you what happens next. You then have a window—typically 7 to 10 days after maturity—to decide what to do with the money.
Your options are: withdraw the full amount (principal plus interest) to your linked bank account, renew the CD for another term at the current interest rate, or move the money to a different bank or account type. If you do nothing and miss the window, most banks automatically renew your CD at their current rate for the same term length. Read the maturity notice carefully so you don't accidentally lock your money away again.
The interest you earned is taxable income in the year the CD matures, even though you didn't touch the money. The bank will send you a 1099-INT form for tax purposes if the interest exceeds $10.
The penalty for early withdrawal and when it matters
If you need the money before maturity, you can withdraw it, but the bank charges a penalty. The penalty is usually expressed as a number of months of interest. A CD with a three-month interest penalty means you lose three months' worth of the interest you've earned so far. If you've only had the CD for one month, you might owe money back to the bank.
Example: You open a one-year CD with $10,000 at 5% interest. After six months, you need the money. Your earned interest is about $250. The bank's penalty is six months of interest, which is about $250. You get your $10,000 back but lose all the interest you earned. If the penalty were nine months of interest and you'd only earned $250, you'd owe the bank $200 out of your principal.
Some banks offer "no-penalty CDs" with slightly lower rates but allow you to withdraw without a penalty after a short waiting period (usually 7 days). These are worth considering if you're not certain you can leave the money untouched.
CD laddering: spreading your money across multiple terms
One strategy people use to balance higher rates with access to cash is called 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 either withdraw the money or renew it. This gives you regular access to portions of your money while still earning higher rates than a savings account.
For example, if you have $50,000, you might buy five $10,000 CDs with maturity dates one year apart. Year one, $10,000 matures. Year two, another $10,000 matures. You get regular access without giving up the rate advantage of longer terms. When rates rise, you can reinvest the maturing CDs at the new higher rate instead of being locked into an old rate for years.
How CD rates compare to other savings options
CDs typically pay more than regular savings accounts or money market accounts at the same bank, but less than what you might earn from stocks or bonds over the same period. The trade-off is certainty: you know exactly what you'll earn with a CD, and you can't lose your principal.
High-yield savings accounts at online banks sometimes offer rates close to CD rates with no lock-in period, so compare before you commit. If you might need the money within a year, a high-yield savings account often makes more sense than a CD with an early withdrawal penalty.
Treasury bills (T-bills) sold by the U.S. government also offer fixed rates and are extremely safe, but they work differently—you buy them at a discount and get the full face value at maturity, rather than earning interest on top of your deposit. They're worth researching if you have larger sums and longer time horizons.
Where to open a CD and what to compare
You can open a CD at any bank, credit union, or online financial institution. Rates vary significantly—an online bank might offer 5.3% on a one-year CD while a brick-and-mortar bank offers 4.8% for the same term. It's worth shopping around because the difference adds up, especially on larger amounts.
When comparing CDs, look at: the interest rate, the term length, the compounding frequency, the early withdrawal penalty (in months of interest), and the minimum deposit required. Some banks require $500 minimums, others $25,000. Some offer CDs as short as three months, others start at six months.
Check whether the bank is FDIC insured (for banks) or NCUA insured (for credit unions). Both provide the same $250,000 protection per account holder per institution. If you're depositing more than $250,000, you'll need to split it across multiple banks to stay fully insured.
Frequently Asked Questions
Can I add money to a CD after I open it?
No. A CD is a fixed agreement. Once you open it with your initial deposit, you cannot add more money to that CD. If you want to invest additional funds, you must open a separate CD. Some banks allow you to open multiple CDs at once with different maturity dates.
What if I need the money before the CD matures?
You can withdraw it, but you'll pay an early withdrawal penalty. The penalty is usually several months of interest. Calculate whether the interest you've earned so far exceeds the penalty—if not, you might lose money. Some banks offer no-penalty CDs with slightly lower rates if this is a concern.
Is a CD a good place to put emergency savings?
Not ideal. Emergency money should be accessible without penalty. A high-yield savings account is better because you can withdraw anytime without losing interest. Use CDs for money you know you won't need for the stated term.
Do I have to pay taxes on CD interest?
Yes. The interest you earn is taxable income in the year the CD matures. The bank sends you a 1099-INT form if interest exceeds $10. You report this on your tax return even though you didn't withdraw the money.
What happens if the bank fails while my CD is open?
Your money is protected up to $250,000 by FDIC insurance. You'll receive your principal and all earned interest, even if the bank goes under. The FDIC takes over and transfers your account to another bank or sends you a check.