A certificate of deposit is a savings product where you lend money to a bank for a fixed period in exchange for a may provide interest rate

When you open a certificate of deposit (CD), you agree to leave a sum of money with the bank untouched for a set time—usually three months to five years. In return, the bank pays you a fixed interest rate, which is almost always higher than what you'd earn in a regular savings account. The bank uses your money during that period and returns both your original deposit and the interest when the term ends.

The trade-off is simple: you give up access to your money, and the bank gives you a better rate. If you withdraw the money before the term is up, you pay a penalty—usually a portion of the interest you would have earned, though the exact amount depends on the bank and the CD's terms.

Key Takeaways

  • A CD locks your money away for a fixed period (three months to five years) in exchange for a higher interest rate than a savings account offers.
  • You know exactly how much interest you will earn before you buy the CD, because the rate is may provide and does not change.
  • Withdrawing money early triggers a penalty, typically measured in months of lost interest, and the penalty amount varies by bank and CD length.
  • CDs are insured by the FDIC up to $250,000 per depositor per bank, so your principal is protected even if the bank fails.
  • When your CD matures, the bank returns your money and interest; you then decide whether to renew, move the funds, or withdraw.

How the interest rate and term length work together

The longer you commit your money to the bank, the higher the interest rate typically is. A three-month CD might pay 4.5 percent annually, while a five-year CD from the same bank might pay 5.2 percent. The bank offers more for longer commitments because it can count on having your money for a longer period and can lend it out with more certainty.

The interest rate is fixed, meaning it does not move if market rates change. If you lock in 5 percent for two years and rates drop to 3 percent six months later, you still earn 5 percent. If rates climb to 7 percent, you still earn 5 percent—this is the cost of the certainty you bought.

Interest compounds according to the bank's terms, which you will see in the CD's disclosure document. Some CDs compound daily, others monthly or quarterly. More frequent compounding means slightly more money at maturity, though the difference is usually small.

What happens if you need the money before maturity

Most CDs impose an early withdrawal penalty if you take your money out before the term ends. The penalty is typically expressed as a number of months of interest—for example, "three months of interest" or "six months of interest." If your CD would have earned $500 in interest and the penalty is three months of interest, you lose roughly $125.

Some banks allow you to withdraw interest without penalty while leaving the principal untouched, but this varies. A few banks offer "no-penalty CDs" that let you withdraw the full amount without a penalty, though these almost always pay a lower interest rate than traditional CDs.

Before you buy a CD, read the disclosure document carefully to understand the exact penalty. The penalty is not a fee to the bank—it is a reduction in what you receive, so it directly affects your return.

FDIC protection and what it covers

CDs held at FDIC-insured banks are covered by FDIC deposit insurance up to $250,000 per depositor per bank. This means if the bank fails, the FDIC will return your principal and any accrued interest up to that limit. The insurance covers the CD itself, not a separate account—your CD balance counts toward your $250,000 limit at that bank.

If you have multiple CDs at the same bank, the insurance covers all of them combined up to $250,000. If you want to insure more than $250,000 in CDs, you can open accounts at different FDIC-insured banks, and each bank's $250,000 limit is separate.

Not all institutions that offer CDs are FDIC-insured. Credit unions offer similar products called share certificates, which are insured by the NCUA up to the same $250,000 limit. Online banks and brokerages may offer CDs from multiple banks, and each CD is insured separately if it is held at an FDIC-insured institution.

CD laddering and managing multiple CDs

Some people buy several CDs with different maturity dates—a strategy called CD laddering. For example, you might buy five one-year CDs, each maturing in consecutive years. As each one matures, you can withdraw the money, reinvest it in a new CD, or move it elsewhere. This approach gives you regular access to portions of your money while keeping most of it locked in at higher rates.

When a CD matures, the bank sends you a notice. You then have a window—usually seven to ten days—to decide what to do. If you do nothing, most banks automatically renew the CD at the current rate for the same term. Read the maturity notice carefully so you do not accidentally renew at a lower rate.

You can also shop around when your CD matures. If another bank is offering a better rate, you can move the money there. There is no penalty for moving funds after maturity, because you are not withdrawing early.

How CDs differ from savings accounts and money market accounts

A regular savings account has no term and no penalty for withdrawal, but it pays a much lower interest rate—often under 0.5 percent annually. A CD locks your rate in exchange for locking your money away, so you earn more if you can afford to wait.

A money market account sits between the two: it typically pays more than a savings account but less than a CD, and it usually allows a limited number of withdrawals per month without penalty. Money market accounts are useful if you want higher returns but need occasional access to your funds.

All three products are FDIC-insured at banks and NCUA-insured at credit unions, so the safety is the same. The choice depends on when you might need the money and how much interest rate you are willing to trade for access.

Frequently Asked Questions

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

No. A CD is a single deposit for a fixed amount. Once you open it, 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 the same time with different amounts.

What happens to my CD if the bank is sold or merges with another bank?

Your CD continues under the same terms. The new bank must honor the rate and maturity date you agreed to. FDIC insurance follows the CD to the new bank, so your coverage does not change. You will receive new account documents reflecting the ownership change.

Is the interest I earn on a CD taxable?

Yes. Interest earned on a CD is taxable income in the year it is credited to your account, even if you do not withdraw it. The bank will send you a 1099-INT form at tax time if the interest exceeds $10. You report this interest on your tax return.

Can I use a CD as collateral for a loan?

Yes. Some banks allow you to borrow against a CD without withdrawing it or paying the early withdrawal penalty. The loan amount is usually limited to a percentage of the CD's value, and you pay interest on the loan. This is useful if you need cash but want to keep the CD earning interest.

What if interest rates rise after I buy my CD?

Your rate stays the same for the full term—you do not benefit from the rate increase. This is the risk you take when you lock in a rate. If rates fall, you benefit because your rate is higher than new CDs. This is why comparing rates across banks before you buy is important.