A CD is a savings account where you agree to leave money untouched for a set time in exchange for a higher interest rate

When you open a Certificate of Deposit (CD), you give the bank a sum of money — say $5,000 — and promise not to touch it for a specific period. That period might be three months, one year, five years, or any length the bank offers. In return, the bank pays you a fixed interest rate that is higher than what you would earn in a regular savings account. At the end of the period, called the maturity date, you get your original money back plus all the interest it earned.

The reason the rate is higher is straightforward: the bank knows exactly how long it can use your money. With a regular savings account, you can withdraw funds whenever you want, so the bank cannot count on having that money available. With a CD, the bank can lend out your money for the full term and knows it will have it back on a specific date. That certainty is worth paying you more.

Key Takeaways

  • You deposit a fixed amount of money and agree not to withdraw it until the maturity date, which can range from a few months to several years.
  • The interest rate on a CD is locked in when you open it and does not change, even if market rates rise or fall during the term.
  • If you withdraw money before the maturity date, the bank charges an early withdrawal penalty, which is usually a few months' worth of interest.
  • When your CD matures, you can withdraw the money, open a new CD, or let the bank automatically renew it — check your bank's policy on what happens by default.
  • CDs are insured by the FDIC up to $250,000 per account, so your money is protected even if the bank fails.

How the interest rate works and why it matters

The interest rate you receive is fixed, meaning it does not change for the entire term. If you open a one-year CD at 4.5 percent, you will earn 4.5 percent for the full twelve months, regardless of whether interest rates in the economy go up or down. This is different from a savings account, where the bank can lower your rate whenever it chooses.

The tradeoff is that you cannot benefit if rates rise. If you lock in 4.5 percent and rates jump to 5.5 percent three months later, you are still earning 4.5 percent on that CD. That is why the length of the CD matters: a longer term means you are betting that rates will not rise significantly, but you also get a higher rate to compensate for that risk.

Interest rates on CDs vary by bank and by term length. A three-month CD typically pays less than a one-year CD, which pays less than a five-year CD. Online banks often pay higher rates than brick-and-mortar banks because their costs are lower. It is worth comparing rates across several banks before you commit.

What happens if you need the money before maturity

If you withdraw money from a CD before the maturity date, the bank charges an early withdrawal penalty. This penalty is usually expressed as a number of months of interest. For example, a penalty might be three months of interest, meaning if you were earning $50 per month, you would lose $150.

The penalty amount varies by bank and by CD term. Longer CDs often have larger penalties. Some banks charge a flat dollar amount instead of a months-of-interest calculation. Before you open a CD, ask the bank what the penalty is — it should be in the disclosure document they give you, often called the Truth in Savings Act disclosure.

In some cases, the penalty can be large enough that you lose money overall. If you earn $200 in interest but the penalty is $300, you walk away with less than you started with. This is why CDs work best for money you genuinely will not need during the term.

What happens when your CD reaches maturity

When the maturity date arrives, you have choices. You can withdraw all the money — your original deposit plus all the interest earned. You can open a new CD with the same bank or a different one. Or you can do nothing and let the bank automatically renew the CD for another term at whatever the current rate is.

Most banks automatically renew CDs unless you tell them not to. This means if you forget about your CD and do not check on it, the bank will roll it into a new CD at the new rate. That new rate might be higher or lower than what you were earning. Banks usually give you a window of time — often seven to ten days after maturity — to withdraw the money or change your instructions without penalty.

Mark your maturity date on a calendar or set a phone reminder. If you want to shop around for a better rate at a different bank, you need to act during that window before the automatic renewal happens.

How much you can deposit and FDIC protection

Most banks have a minimum deposit requirement for CDs, often $500 or $1,000, though some online banks have lower minimums. There is no legal maximum, but the FDIC insurance limit matters: your CD is insured up to $250,000 per account at each bank.

If you have more than $250,000 to invest in CDs, you can open accounts at multiple banks to keep all your money insured. You can also open CDs in different ownership categories — for example, one in your name alone and one in a joint account with your spouse — and each would be insured separately up to $250,000.

FDIC insurance means that if the bank fails, you will get your money back up to the limit. This protection applies whether the bank is a traditional brick-and-mortar location or an online-only bank, as long as it is FDIC-insured. You can check whether a bank is insured on the FDIC website.

CD ladders: a strategy for longer terms

One way to balance the higher rates of longer CDs with the flexibility of shorter ones is to build a CD ladder. This means opening multiple CDs with different maturity dates. For example, you might open five one-year CDs, each maturing in a different year. Each year, one CD matures and you can withdraw the money or reinvest it at the current rate.

A ladder gives you access to some of your money each year while still earning the higher rates that longer terms offer. It also protects you against locking in a low rate for a long time: if rates rise, you can reinvest the maturing CDs at the new higher rates instead of waiting years for the entire amount to mature.

You do not need a special account to build a ladder — you straightforward open separate CDs with staggered maturity dates at your bank or across multiple banks. The strategy works best if you have a lump sum to invest and do not need when ready access to all of it.

CDs versus savings accounts and money market accounts

A CD pays more interest than a regular savings account because you give up the ability to withdraw whenever you want. A savings account offers flexibility: you can add or remove money at any time without penalty. If you might need the money within a year or two, a savings account is usually the safer choice.

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 you to withdraw money, though sometimes with limits on how many withdrawals you can make per month. Money market accounts are useful if you want better returns than savings but need more flexibility than a CD offers.

The right choice depends on your situation. If you have money you will not need for at least six months to a year, a CD usually makes sense. If you might need it sooner, or if you want to add to the account regularly, a savings account is better.

Frequently Asked Questions

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

No. A CD is a fixed contract: you deposit a set amount at the beginning, and that amount stays the same until maturity. If you want to invest more money, you would need to open a separate CD. Some banks let you open multiple CDs at the same time with different amounts.

What if interest rates drop after I open my CD?

You are protected. Your rate is locked in and will not change. You keep earning the same rate for the full term, even if the bank lowers rates for new CDs. This is one advantage of CDs: you know exactly what you will earn.

Do I have to pay taxes on CD interest?

Yes. CD interest is taxable income. The bank will send you a 1099-INT form at the end of the year showing how much interest you earned, and you report that on your tax return. Some people open CDs in retirement accounts like IRAs to defer taxes, but that is a separate decision.

What happens if the bank goes out of business?

If the bank is FDIC-insured, you are protected up to $250,000. The FDIC will pay you your deposit plus any interest earned up to the maturity date. You will not lose money, though there may be a delay while the FDIC processes claims.

Can I move my CD to a different bank before it matures?

Technically yes, but you would pay the early withdrawal penalty. It is usually not worth moving a CD unless you found a significantly higher rate at another bank and the penalty is small. Calculate whether the higher rate over the remaining term would make up for the penalty cost.