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

A Certificate of Deposit, or CD, is a contract between you and a bank. You give the bank a lump sum of money — say $5,000 — and promise not to touch it for a specific period. That period might be three months, six months, one year, or five years. In return, the bank pays you a fixed interest rate that is almost always higher than what you would earn in a regular savings account.

The bank uses your money during that time and pays you interest as compensation. When the term ends — called the maturity date — you get your original money back plus all the interest earned. If you need the money before the maturity date, you can withdraw it, but you will pay a early withdrawal penalty, which means the bank takes back some of the interest you earned.

CDs are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per account holder per bank, the same protection that covers regular savings accounts. This means if the bank fails, your money is protected.

Key Takeaways

  • You deposit a fixed amount of money and agree not to withdraw it until a specific maturity date in exchange for a higher interest rate than a savings account offers.
  • The interest rate on a CD is locked in when you open it and does not change, even if the bank's rates go up or down.
  • Withdrawing money before the maturity date triggers an early withdrawal penalty that reduces your earnings.
  • CDs are FDIC-insured up to $250,000, so your principal is protected if the bank fails.
  • Different CD terms — from three months to five years — offer different interest rates, with longer terms usually paying more.

How the interest rate and term length work together

When you open a CD, two things are locked in: the interest rate and the term. The interest rate is the percentage the bank will pay you on your money. The term is how long your money stays in the CD. These two factors are connected — longer terms almost always come with higher interest rates.

For example, a bank might offer 4.5% on a one-year CD and 5.2% on a five-year CD. The bank pays more for the longer commitment because it knows it can use your money for a longer period. You earn more interest, but you also give up access to your money for longer.

The interest rate does not change during the term. If you open a CD at 5% and rates rise to 6% the next month, you still earn 5%. This is a trade-off: you get certainty and a may provide return, but you miss out if rates go higher.

What happens when your CD reaches maturity

When the maturity date arrives, your CD stops earning interest. At this point, you have a few options. You can withdraw the money and the interest you earned. You can let the CD automatically renew into a new CD with the same term — most banks do this by default unless you tell them not to. Or you can move the money to a different account or a different CD with a different term.

Banks usually give you a grace period of seven to ten days after maturity to make a decision. If you do nothing during that window and the CD auto-renews, you are locked in again for another full term. If you want to avoid auto-renewal, contact your bank before the maturity date and tell them what you want to do.

Early withdrawal penalties and when they explore

If you need your money before the maturity date, you can withdraw it, but the bank will charge you 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" or "six months of interest."

How the penalty works: if you have earned $200 in interest so far and the penalty is three months of interest (which equals $50), the bank subtracts $50 from your withdrawal. You get your original $5,000 plus $150 in interest instead of $200. In some cases, if you withdraw very early, the penalty might be larger than the interest you have earned, meaning you actually lose some of your original deposit.

The penalty amount varies by bank and by CD term. Longer-term CDs usually have larger penalties. Before you open a CD, ask the bank what the early withdrawal penalty is — it should be in the disclosure documents they give you.

Different types of CDs and how they differ

Most CDs are straightforward: you deposit money, wait, and collect interest. But banks also offer variations. A no-penalty CD lets you withdraw your money early without a penalty, though the interest rate is usually lower than a standard CD. A bump-up CD or raise-your-rate CD lets you increase your interest rate once if rates go up during your term. A step-up CD automatically increases your rate at set intervals.

Some banks offer promotional CDs with higher rates for a limited time, often when rates are rising. These are real offers, not tricks, but they are only available for a window of time. A jumbo CD requires a larger minimum deposit — often $100,000 or more — and typically pays a higher rate.

There are also IRA CDs, which are CDs held inside a retirement account. These follow the same CD rules but also follow IRA withdrawal rules, which are different and more complex.

Why banks offer CDs and why you might choose one

Banks offer CDs because they want to borrow your money for a predictable period. When you commit to leaving money in a CD, the bank knows exactly how long it can lend that money out or invest it. This certainty lets them offer you a higher rate than a savings account, where you could withdraw anytime.

You might choose a CD if you have money you will not need for a specific period and you want a may provide return. CDs are useful for saving toward a goal that is months or years away — a down payment, a car, a home repair fund. They are also useful if you are nervous about market risk and want your money to earn more than a savings account without the ups and downs of stocks or bonds.

CDs are not useful if you might need the money unexpectedly, because the early withdrawal penalty will cost you. They are also not useful if you think interest rates will rise significantly, because your rate is locked in and you cannot take advantage of higher rates without paying a penalty to exit early.

How to compare CDs across different banks

When you are looking for a CD, compare three things: the interest rate, the term length, and the early withdrawal penalty. The interest rate is what you earn. The term is how long your money is locked up. The penalty is what it costs if you need to exit early.

Interest rates vary by bank and change frequently. Online banks often pay higher rates than brick-and-mortar banks because they have lower overhead costs. Credit unions sometimes offer competitive rates too. You can compare rates on bank websites or on financial comparison sites, but remember that rates change, so check directly with the bank before you open an account.

Also check the minimum deposit required. Some CDs require $500, others require $10,000 or more. Make sure the bank is FDIC-insured and that your deposit will be covered by the $250,000 insurance limit. If you are depositing more than $250,000, you can open multiple CDs at different 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 accounts. You deposit a lump sum when you open it, and that amount stays the same until maturity. If you want to save more money, you would need to open a separate CD or use a regular savings account.

What happens to my CD if the bank fails?

Your CD is protected by FDIC insurance up to $250,000. If the bank fails, the FDIC takes over and makes sure you get your money back, including any interest earned up to the failure date. You do not need to do anything — the FDIC handles it automatically.

Is the interest rate on a CD the same as the APY?

The APY (Annual Percentage Yield) is the rate you will actually earn when compounding is included. For CDs, the APY and the stated rate are usually very close or identical, but always check the disclosure to see which number the bank is quoting. The APY is the number that matters for comparing CDs.

Can I move money from one CD to another without a penalty?

Only if the first CD has reached its maturity date. If you withdraw before maturity, you pay the early withdrawal penalty. Once the CD matures, you can move the money to a new CD or any other account without penalty during the grace period the bank gives you.

What is the shortest CD term available?

Most banks offer CDs with terms as short as three months, though some offer one-month or even weekly CDs. The shorter the term, the lower the interest rate. Longer terms — one year, three years, five years — typically pay more.