What a Certificate of Deposit Is and How It Works
A certificate of deposit (CD) is a savings account where you agree to leave money in the bank for a set period of time in exchange for a higher interest rate than a regular savings account. You deposit a lump sum, the bank holds it untouched for the term you choose—typically three months to five years—and at the end, you get your money back plus the interest earned.
The bank pays you more interest because it knows exactly how long it will have your money. That predictability lets them lend it out or invest it with confidence. You're trading access to your cash for a better return. If you need the money before the term ends, you'll pay an early withdrawal penalty that eats into or eliminates your interest earnings.
Key Takeaways
- You deposit a fixed amount of money for a fixed period, and the bank pays you a set interest rate that does not change during the term.
- The interest rate on a CD is almost always higher than what a regular savings account offers, but you cannot touch the money without penalty until the term ends.
- Early withdrawal penalties vary by bank and by CD term length; some banks charge three months of interest, others charge a flat fee or a percentage of your deposit.
- When your CD matures, the bank will either return your principal and interest or automatically roll it into a new CD at the current rate unless you tell them otherwise.
- CDs are insured by the FDIC up to $250,000 per depositor per bank, so your money is protected even if the bank fails.
How Interest Rates and Terms Work on CDs
The interest rate the bank offers depends on how long you lock your money away and what rates are in the broader economy. Longer terms usually pay higher rates—a five-year CD will typically pay more than a three-month CD—because the bank wants compensation for tying up your funds longer. But this is not a rule; it depends on market conditions and what the bank decides.
The rate you receive is fixed, meaning it does not change. If you buy a one-year CD at 4.5 percent, you will earn 4.5 percent for the full year, even if rates drop to 2 percent or rise to 6 percent. That stability is the appeal: you know exactly what you will have at maturity. The interest compounds according to the bank's terms—some compound daily, some monthly—and that compounding is included in the rate they quote you.
Early Withdrawal Penalties and When They Apply
If you withdraw money from a CD before the maturity date, the bank charges a penalty. The amount varies widely. Some banks charge three to six months of interest; others charge a flat fee like $25 or $50; still others charge a percentage of your principal. A bank might charge you 150 days of interest on a five-year CD but only 30 days on a three-month CD. You need to read the CD's terms before you buy it.
The penalty is deducted from your interest earnings first. If you earned $100 in interest and the penalty is $75, you walk away with $25 of interest plus your original deposit. If the penalty exceeds your interest, you lose principal—you get back less than you put in. This is why CDs work best for money you genuinely will not need during the term.
Some banks now offer no-penalty CDs that let you withdraw early without a penalty, but they pay lower interest rates to offset that flexibility. The trade-off is explicit: more access, less return.
What Happens When Your CD Matures
When the term ends, your CD reaches maturity. At that point, the bank will do one of two things: it will either deposit your principal and interest into your linked savings or checking account, or it will automatically roll the CD into a new CD at the current rate. Banks are required to tell you in advance what they will do, and they give you a grace period—usually seven to ten days—to tell them to do something different.
If you do nothing and the bank auto-renews, you are locked in for another term at whatever rate the bank is offering at that moment. That rate might be higher or lower than what you earned before. If you want your money back without buying another CD, you must contact the bank during the grace period and request a withdrawal. If you miss the window, you will have to pay an early withdrawal penalty to get out of the new CD.
FDIC Insurance and Safety
CDs are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per depositor per bank. This means if the bank fails, the FDIC will return your money up to that limit. Your principal and accrued interest are both covered. If you have $250,000 in a CD at one bank and $250,000 at another bank, both are fully insured because the insurance is per bank, not per account.
This protection makes CDs one of the safest places to put money. You are not betting on the bank's performance or the stock market; you are simply lending money to an insured institution for a may provide return. The trade-off is that your return is modest compared to stocks or bonds, but the risk is essentially zero.
CDs Versus Other Savings Options
A regular savings account is more flexible but pays less interest. You can withdraw anytime without penalty, but the rate is usually 0.01 to 0.5 percent. A money market account sits between the two: it pays more than savings but less than a CD, and it lets you write checks or make withdrawals, though often with limits. A high-yield savings account at an online bank can pay rates close to short-term CDs—sometimes 4 to 5 percent—with full liquidity, but those rates can change at any time.
Choose a CD if you have money you will not need for months or years and you want a may provide return. Choose a savings account if you need access to the money or if rates are falling and you want to stay flexible. The best choice depends on your timeline and whether you can afford to lock the money away.
How to Buy a CD
You can buy a CD at any bank or credit union. Walk in, call, or go online and tell them the amount you want to deposit and the term you want. They will show you the rate and the terms, including the early withdrawal penalty. You sign the agreement, hand over the money, and the CD begins. The bank will send you a statement confirming the details.
Shop around before you buy. Rates vary significantly between banks. A credit union might pay 5 percent on a one-year CD while a big national bank pays 4 percent for the same term. Online banks often pay higher rates than brick-and-mortar banks because their overhead is lower. Websites like Bankrate and DepositAccounts let you compare rates across institutions in your area or nationwide.
Frequently Asked Questions
Can I withdraw money from a CD before it matures?
Yes, but you will pay an early withdrawal penalty. The penalty amount depends on the bank and the CD term. It is usually three to six months of interest, but it can be a flat fee or a percentage of your deposit. Read the CD agreement to know the exact penalty before you buy.
What happens if I need the money and can't afford the penalty?
You can still withdraw, but you will lose money. If your penalty is larger than your interest earnings, you will get back less than you deposited. This is why CDs are best for money you are certain you will not need. If you might need it, a high-yield savings account is safer.
Do I have to pay taxes on CD interest?
Yes. CD interest is taxable income in the year it is earned 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 it on your tax return like any other interest income.
What if rates go up after I buy my CD?
Your rate stays the same for the full term. If you locked in 3 percent and rates jump to 5 percent, you still earn 3 percent. This is the downside of the fixed rate. You can buy a new CD at the higher rate when this one matures, but you cannot change the current one without paying an early withdrawal penalty.
Is my money safe in a CD if the bank fails?
Yes. The FDIC insures CDs up to $250,000 per depositor per bank. If the bank fails, the FDIC returns your principal and all accrued interest up to that limit. Your money is protected even in a worst-case scenario.