A certificate of deposit is a savings account where you lock money away for a set time in exchange for a may provide interest rate

A certificate of deposit (CD) is not a separate type of account—it is a savings product with a fixed term and a fixed rate. You give a bank or credit union a sum of money, agree not to touch it for a specific period (called the term), and in return they pay you a set interest rate that does not change. The rate is typically higher than what you would earn in a regular savings account, because the bank knows exactly when you will withdraw the money and can lend it out with confidence.

The mechanics are straightforward: you deposit money, the bank holds it, time passes, and at the end of the term you get your original deposit plus the interest earned. If you need the money before the term ends, you can withdraw it—but you will pay an early withdrawal penalty, which is a fee that reduces your earnings or your principal. The penalty amount varies by bank and by term length; a bank might charge three months of interest, or a flat fee, or a percentage of the deposit.

CDs are FDIC-insured at banks and NCUA-insured at credit unions, meaning your money is protected up to $250,000 per depositor per institution if the bank fails. This makes them one of the safest places to keep money, though the tradeoff is that your money is locked away and earning a fixed return rather than growing with market investments.

Key Takeaways

  • You deposit a lump sum, agree to leave it untouched for a set term (three months to five years is common), and receive a may provide interest rate that does not change.
  • The interest rate on a CD is typically higher than a regular savings account because the bank can count on having your money for the full term.
  • Withdrawing money before the term ends triggers an early withdrawal penalty, which reduces what you earn or what you get back.
  • Your deposit is insured up to $250,000 by the FDIC (at banks) or NCUA (at credit unions), making CDs one of the safest savings products.
  • CDs work best for money you know you will not need for months or years and want to protect from market risk.

How the interest rate and term length work together

The interest rate you earn depends on two things: what the bank is willing to pay, and how long you lock your money away. Longer terms usually pay higher rates because the bank has your money for a longer period and can plan further ahead. A three-month CD might pay 4.5 percent, while a five-year CD from the same bank might pay 5.2 percent. The difference is not always large, but it compounds over time.

The rate is fixed, meaning it does not move if market interest rates rise or fall. If you buy a one-year CD at 4.8 percent and rates jump to 6 percent six months later, you still earn 4.8 percent. This is a protection and a risk: you are protected from rates falling, but you miss out if rates rise. Some banks offer bump-up CDs or step-up CDs that let you increase your rate once during the term if market rates move in your favor, though these usually start at a slightly lower initial rate.

Interest on a CD is usually compounded and paid out at maturity—meaning when the term ends, you receive your original deposit plus all the interest earned. Some CDs compound monthly or quarterly and pay interest into a linked savings account, but the most common structure is a single payout at the end.

What happens when your CD reaches maturity

When the term ends, your CD matures. At that point, the bank will either automatically renew it into a new CD at the current rate, or deposit the money into a linked savings account. The exact process depends on your bank's policy and what you set up when you opened the CD.

Most banks give you a grace period—usually seven to ten days after maturity—during which you can withdraw the money without penalty or move it elsewhere. If you do nothing during that window, the bank will renew the CD automatically, often at whatever rate they are currently offering for that term length. That new rate might be higher or lower than what you were earning.

If you want to avoid automatic renewal, you need to contact your bank before the maturity date and tell them what you want to do: withdraw the money, move it to savings, or open a new CD at a different term. Some banks let you do this online; others require a phone call or a visit.

Early withdrawal penalties and when they explore

The early withdrawal penalty is the cost of breaking your agreement to leave the money alone. It exists because the bank counted on having your deposit for the full term and may have already lent it out or committed it elsewhere. When you withdraw early, the bank loses that certainty and charges you for it.

Penalties vary widely. A bank might charge three months of interest, six months of interest, or a flat fee like $25 or $50. Some banks calculate the penalty as a percentage of the deposit—for example, 0.5 percent of the amount withdrawn. Longer-term CDs often have larger penalties than short-term ones. A three-month CD might have a penalty of one month's interest, while a five-year CD might have a penalty of six months' interest.

The penalty is deducted from your earnings first. If you earned $200 in interest and the penalty is $150, you walk away with $50 of interest plus your original deposit. If the penalty exceeds your earnings, it comes out of your principal—you get back less than you deposited. Before opening a CD, ask the bank what the early withdrawal penalty is; it should be disclosed in the account agreement or on the product page.

CD ladders and how they solve the lock-in problem

One drawback of CDs is that your money is locked away. A CD ladder is a strategy to reduce that problem: instead of putting all your money into one CD with a long term, you split it into multiple CDs with different maturity dates.

For example, if you have $5,000 to save, you might buy five $1,000 CDs: one with a three-month term, one with a six-month term, one with a nine-month term, one with a twelve-month term, and one with an eighteen-month term. Every three months, one CD matures. You can then decide whether to spend the money, move it to savings, or buy a new CD at the longest term to keep the ladder going. This way, you always have some money becoming available without paying early withdrawal penalties, while still earning higher rates than a regular savings account.

Laddering works best when you have a larger sum to divide and when you are comfortable managing multiple accounts. It requires more attention than a single CD, but it gives you more flexibility.

CDs versus regular savings accounts and money market accounts

A regular savings account lets you deposit and withdraw money whenever you want, with no penalty. The tradeoff is that the interest rate is much lower—often 0.01 percent or less at large banks, though online banks may offer 4 to 5 percent. You have complete flexibility but earn very little.

A money market account sits between a savings account and a CD. It usually pays a higher rate than savings (though lower than a CD), lets you withdraw money without penalty, but may limit how many withdrawals you can make per month. Money market accounts are good if you want some growth without locking money away, but you sacrifice the higher may provide rate of a CD.

A CD is right for money you will not need for a specific period and want to protect from risk. If you might need the money sooner, or if you want to keep adding to your savings regularly, a savings account or money market account is more practical. If you have money sitting idle and rates are attractive, a CD locks in that rate and prevents you from spending the money on impulse.

How to compare CDs across banks

CD rates change constantly and vary by bank. A large national bank might offer 4.2 percent on a one-year CD, while an online bank offers 5.1 percent for the same term. The difference adds up: on a $10,000 deposit, that 0.9 percent gap means $90 more in interest over the year.

When comparing CDs, look at the annual percentage yield (APY), not just the interest rate. APY accounts for how often interest is compounded and shows you the true return. Two banks might quote different rates, but APY lets you compare them directly.

Also compare the early withdrawal penalty, the minimum deposit required, and whether the bank offers bump-up or step-up options. Some banks waive the penalty if you withdraw due to death or disability, which matters if that is a concern. Check whether the bank is FDIC-insured and whether your deposit will be fully covered under the $250,000 limit. If you are depositing more than $250,000, you can open CDs at multiple banks to stay within the insurance limit at each one.

Frequently Asked Questions

Can I add money to a CD after I open it?

No. CDs are fixed-amount products. Once you open one, you cannot deposit additional money into that same CD. If you want to save more, you would open a separate CD. This is different from a savings account, where you can deposit money anytime.

What happens if the bank fails while my CD is open?

Your deposit is protected up to $250,000 by the FDIC (at banks) or NCUA (at credit unions). If the bank fails, the insuring agency will pay you your deposit plus any accrued interest, even if the CD has not matured yet. You do not lose money due to bank failure.

Can I withdraw my CD money without a penalty?

Only during the grace period after maturity, which is usually seven to ten days. Some banks offer no-penalty CDs that let you withdraw anytime without a fee, but these pay lower interest rates than traditional CDs. Ask your bank if they offer this option.

Is the interest I earn on a CD taxable?

Yes. CD interest is taxable income in the year it is earned or paid out, depending on how your bank reports it. You will receive a 1099-INT form from the bank showing the interest earned. If the CD is in a tax-advantaged account like an IRA, the interest grows tax-deferred.

What is the shortest CD term available?

Most banks offer three-month CDs as their shortest term, though some offer one-month or even weekly CDs. Shorter terms pay lower rates because the bank has your money for less time. Rates increase as the term gets longer, up to a point—five-year CDs usually pay more than ten-year CDs.