What a CD is and how it differs from a regular savings account

A certificate of deposit (CD) is an account where you agree to leave money untouched for a set period — called the term — in exchange for a higher interest rate than a regular savings account offers. When you open a CD, you choose how long to lock up your money: common terms are 3 months, 6 months, 1 year, 2 years, or 5 years. The bank pays you a fixed interest rate for that entire period, and you know exactly how much you will have when the term ends.

The trade-off is access. With a savings account, you can withdraw money whenever you want. With a CD, if you take money out before the term is over, the bank charges you a penalty — usually a certain number of months' worth of interest. That penalty can wipe out all the extra earnings a CD gave you, which is why CDs work best for money you genuinely will not need for several months or years.

Banks use CDs to borrow money from you at a predictable cost. You use them to earn more on savings than you would in a checking or savings account. The longer the term, the higher the rate is usually — but rates change constantly, and what a bank offers one week may be different the next.

Key Takeaways

  • A CD locks your money for a set term (3 months to 5 years) in exchange for a fixed interest rate higher than a savings account.
  • Early withdrawal penalties typically cost you several months of interest, so only use a CD for money you will not need before the term ends.
  • CD rates vary by bank, term length, and deposit amount, so comparing offers across banks can add hundreds of dollars to your earnings.
  • When your CD matures, the bank returns your principal plus interest, and you can either withdraw the money or roll it into a new CD.

How interest rates and terms work on CDs

The interest rate a bank offers on a CD depends on three things: the term length, the amount you deposit, and the current interest rate environment. Longer terms usually pay more — a 5-year CD typically pays more than a 1-year CD at the same bank. Larger deposits sometimes may have access to for higher rates, though this varies by bank. And when the Federal Reserve raises or lowers its benchmark rate, banks adjust their CD rates within days or weeks.

The rate you lock in is fixed, meaning it does not change for the life of the CD. If you open a 2-year CD at 4.50% and rates drop to 2.00% next month, you still earn 4.50%. If rates jump to 6.00%, you still earn 4.50%. This is why timing matters: locking in a high rate before a rate drop is valuable, but locking in a low rate before a rate rise costs you.

Interest compounds, usually daily or monthly depending on the bank. Compounding means the interest you earn also earns interest. A CD that compounds daily will pay slightly more than one that compounds monthly, though the difference is small on most balances.

What happens when your CD matures

When the term ends, your CD matures. The bank returns your original deposit (called the principal) plus all the interest you earned. You then have a choice: withdraw the money, or roll it over into a new CD.

If you do nothing, many banks automatically roll your CD into a new one at the current rate for the same term length. This happens during a grace period — usually 7 to 10 days after maturity — and you can cancel the new CD during that window without penalty. Read your CD agreement to know your bank's rollover rules, because some banks do not auto-renew and will move your money to a savings account instead.

Rolling over makes sense if rates have not dropped significantly. Opening a new CD at a lower rate than you had before is usually worth avoiding, so check what your bank is currently offering before the grace period ends. If rates have risen, rolling over locks in the new higher rate. If rates have fallen sharply, you might withdraw the money and keep it in a savings account until rates recover.

Early withdrawal penalties and when they apply

If you withdraw money from a CD before the term ends, the bank charges a penalty. The penalty is usually expressed as a number of months of interest — for example, "3 months of interest" or "6 months of interest." On a $10,000 CD earning 4.50% annually, 3 months of interest is about $112.50, so that would be your penalty.

The penalty comes out of your interest earnings first. If you have not earned enough interest yet to cover the penalty, the bank takes the difference from your principal. This is why early withdrawal from a CD can leave you with less money than you started with.

Some banks offer no-penalty CDs that let you withdraw without a penalty, but they pay lower interest rates to offset that flexibility. Whether a no-penalty CD makes sense depends on how certain you are that you will not need the money. If there is any real chance you will need it within the term, a no-penalty CD or a savings account is safer than a traditional CD.

FDIC insurance and safety

Money in a CD at an FDIC-insured bank is protected up to $250,000 per depositor, per bank, per account type. This means if the bank fails, the Federal Deposit Insurance Corporation will return your principal and accrued interest up to that limit. Most traditional banks are FDIC-insured; you can check a bank's status on the FDIC website.

If you have more than $250,000 to save, you can open CDs at multiple banks to stay within the insurance limit at each one. Some people also use brokered CDs — CDs sold through investment firms — which can be insured separately if held at different banks, but brokered CDs have different rules and sometimes higher penalties, so understand the terms before buying.

Comparing CD rates across banks

CD rates vary significantly between banks. On any given day, one bank might offer 4.75% for a 1-year CD while another offers 4.25% for the same term. Over a year, that 0.50% difference adds up: on a $25,000 CD, it is about $125 in extra earnings. Comparing rates across banks takes 15 minutes and can be worth hundreds of dollars.

Online banks typically offer higher rates than brick-and-mortar banks because they have lower overhead costs. Credit unions sometimes offer competitive rates to members. Websites like Bankrate, DepositAccounts, and the Federal Reserve's own rate tracker let you see current CD rates from multiple banks side by side.

When comparing, check the term length, the compounding frequency, and the early withdrawal penalty. A slightly lower rate at a bank with a lower penalty might be better than a higher rate with a steep penalty. Also verify that the bank is FDIC-insured before opening an account.

CDs versus other savings options

A CD is not the only way to earn interest on savings. A high-yield savings account lets you withdraw money anytime without penalty, but pays less interest — typically 0.50% to 1.50% less than a comparable CD. Money market accounts offer similar flexibility with rates between savings accounts and CDs. Treasury bills (short-term government bonds) can pay as much as a CD and are backed by the U.S. government, but require a minimum purchase and are less convenient to buy.

Choose a CD if you have money you will not need for several months or years and want to lock in a rate. Choose a savings account if you need flexibility or are building an emergency fund. Choose a Treasury bill if you want government backing and can handle the purchase process. Many people use a mix: emergency funds in a savings account, medium-term savings in a CD, and longer-term money in bonds or other investments.

Frequently Asked Questions

Can I withdraw money from a CD before it matures?

Yes, but you will pay an early withdrawal penalty. The penalty is usually several months of interest, and if you have not earned that much yet, the bank takes the difference from your principal. Some banks offer no-penalty CDs that let you withdraw without a fee, but they pay lower rates.

What is the difference between a CD and a savings account?

A CD locks your money for a set term and pays a higher fixed rate, but charges a penalty if you withdraw early. A savings account lets you withdraw anytime without penalty, but pays lower interest. CDs work for money you will not need soon; savings accounts work for emergency funds or money you might need quickly.

Do I have to pay taxes on CD interest?

Yes. CD interest is taxable income in the year you earn it, even if you do not withdraw the money. Your bank will send you a 1099-INT form at tax time showing how much interest you earned. The interest counts as ordinary income and is taxed at your regular income tax rate.

What happens if the bank fails while I have a CD?

The FDIC insures deposits up to $250,000 per bank, so you will get your principal and accrued interest back. Make sure your bank is FDIC-insured before opening a CD. You can check on the FDIC website using the bank's name.

Is it better to open one long CD or several short ones?

That depends on interest rate expectations. If you think rates will rise, shorter CDs let you reinvest at higher rates sooner. If you think rates will fall, a longer CD locks in a higher rate. If you are unsure, a mix of terms — called a CD ladder — spreads your risk and gives you flexibility.