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 a bank product that works like this: you give the bank a lump sum of money, agree not to touch it for a specific period—usually three months to five years—and the bank pays you a fixed interest rate in return. That rate is almost always higher than what you'd earn in a regular savings account, sometimes two to five times higher depending on how long you lock the money away.
The trade-off is simple: access for interest. You can't withdraw the money without a penalty until the term ends. The penalty is usually a chunk of the interest you've earned, or sometimes a percentage of your principal. That penalty structure is why CDs work best for money you genuinely won't need during the term.
Banks use your CD money to make loans and other investments. In exchange, they may provide you a specific rate of return and the safety of your principal—your deposit is insured by the FDIC up to $250,000 per account holder per bank.
Key Takeaways
- You deposit a fixed amount, choose a term length (three months to five years is typical), and receive a may provide interest rate that doesn't change.
- Your money is locked until the term ends; withdrawing early triggers a penalty that usually costs you some or all of the interest earned.
- CD rates are higher than savings accounts because the bank knows exactly how long it can use your money.
- Your deposit is FDIC-insured up to $250,000, so your principal is protected even if the bank fails.
- CDs work best for money you won't need for months or years and want to protect from the temptation to spend.
How the interest rate and term length work together
The longer you agree to lock your money away, the higher the interest rate the bank will offer 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 is willing to pay more because it gets to hold your money longer and plan around it.
The interest compounds—meaning you earn interest on your interest—and the bank adds it to your account at regular intervals (daily, monthly, or quarterly, depending on the CD). When your term ends, you get your original deposit plus all the interest earned. At that point, you can withdraw the money, move it to another CD, or let it roll over into a new CD at whatever rate the bank is offering at that time.
The rate you lock in is fixed for the entire term. If interest rates rise after you buy your CD, you don't benefit—you're stuck with your original rate. If rates fall, you're protected and earning more than new CDs would pay. This is why timing matters: buying a CD when rates are high is better than buying one when rates are falling.
The early withdrawal penalty and when it applies
If you need the money before the term ends, you can withdraw it, but you'll pay a penalty. The penalty structure varies by bank and by CD term. A common penalty for a one-year CD might be three months of interest; for a five-year CD, it might be one year of interest. Some banks charge a flat dollar amount instead.
The penalty comes out of your interest earnings first. If you've earned $200 in interest and the penalty is $150, you get back your principal plus $50. If the penalty exceeds your interest, it comes out of your principal—you get back less than you deposited. This is rare with short-term CDs but possible with longer ones if you withdraw very early.
Banks are required to disclose the penalty amount before you open the CD, so read the terms carefully. Some banks offer "no-penalty CDs" that let you withdraw without a penalty, but they pay lower interest rates to compensate for that flexibility.
CD laddering: a way to balance access and higher rates
One strategy people use to avoid locking all their money away for years is CD laddering. You divide your money into several CDs with different term lengths—say, one-year, two-year, three-year, and four-year CDs. Each year, one CD matures, giving you access to that chunk of money. You can then decide whether to withdraw it, spend it, or roll it into a new longer-term CD.
Laddering lets you take advantage of higher rates on longer terms while still having regular access to portions of your money. It also protects you if rates rise: when each CD matures, you can reinvest at the new (possibly higher) rate rather than being locked into an old rate for years.
For example, if you have $10,000, you might buy four $2,500 CDs maturing in one, two, three, and four years. After year one, the first CD matures and you have $2,500 plus interest available. You can spend it or buy a new four-year CD, which now pays a higher rate than the original four-year CD you bought four years ago.
Where to find CDs and how rates compare
CDs are offered by banks, credit unions, and online banks. Online banks typically pay higher rates than brick-and-mortar banks because they have lower overhead costs. Rates vary significantly—a five-year CD might pay 4.5 percent at one bank and 5.3 percent at another, a difference that compounds to hundreds of dollars over the term.
To compare, check the CD rates listed on bank websites or use rate-comparison sites that aggregate current offerings. Look at the annual percentage yield (APY), which accounts for compounding, not just the stated rate. Also check the minimum deposit required—some banks require $500, others $25,000 or more.
Credit unions sometimes offer higher rates than banks, especially if you're a member. If you have money spread across multiple banks, remember that FDIC insurance covers up to $250,000 per bank, so a very large deposit might need to be split across institutions to stay fully protected.
CDs versus savings accounts and money market accounts
A regular savings account is more flexible—you can withdraw anytime without penalty—but it pays much less interest, often 0.01 to 0.5 percent annually. A money market account sits in the middle: it pays more than savings but less than CDs, and it usually lets you make a few withdrawals per month without penalty.
Choose a CD if you have money you won't need for at least three months and want the highest may provide rate. Choose a savings account if you need quick access or might need the money unexpectedly. A money market account works if you want something between the two—slightly higher rates than savings but more flexibility than a CD.
Some people use all three: emergency savings in a high-yield savings account for immediate access, money they'll need in six to twelve months in a money market account, and longer-term savings in CDs.
What happens when your CD matures
When your term ends, the bank sends you a notice (usually 10 to 30 days before maturity) telling you what happens next. You have a window—typically 7 to 10 days—to decide. Your options are: withdraw the money, buy a new CD at the current rate, or let it roll over automatically into a new CD at the bank's current rate.
If you do nothing, most banks automatically roll the CD into a new one at the same term length but at whatever rate they're currently offering. This is convenient if rates haven't changed much, but if rates have dropped significantly, you might want to shop around or move your money to a higher-paying bank instead.
The maturity notice is your reminder to actively decide rather than drift. If you're happy with the rate and the bank, rolling over takes one phone call or a few clicks online. If you want to move your money, the bank will send it to your linked account or issue a check.
Frequently Asked Questions
Can I add more money to a CD after I open it?
No. A CD is a fixed deposit for a fixed term. Once you open it, you can't add to it. If you want to invest more money, you'd open a separate CD. Some banks let you open multiple CDs at once with different terms or amounts.
What if interest rates rise after I buy a CD?
You're locked into your original rate for the entire term. You can't change it. If rates rise significantly and you need the money, you could withdraw early and pay the penalty, then buy a new CD at the higher rate—but the penalty usually makes this a losing move unless rates have risen a lot.
Is my money safe in a CD if the bank fails?
Yes. The FDIC insures deposits up to $250,000 per account holder per bank. Your CD principal and earned interest are both covered. If the bank fails, the FDIC will transfer your CD to another bank or pay you directly.
Do I pay taxes on CD interest?
Yes. CD interest is taxable income in the year it's earned or credited to your account, depending on how the bank compounds it. The bank will send you a 1099-INT form at tax time showing how much interest you earned. This is one reason CDs in retirement accounts (like IRAs) can be useful—the interest grows tax-deferred.
What's the difference between a CD and a bond?
Both lock up money for a set time and pay interest, but bonds are issued by governments or corporations and can be sold before maturity (though the price fluctuates). CDs are issued by banks, can't be sold, and have a fixed value. CDs are simpler and safer for most people; bonds require more knowledge and have more risk.