What a Certificate of Deposit Is

A Certificate of Deposit (CD) is an account where you give a bank a sum of money for a fixed period — typically three months to five years — and the bank pays you a set interest rate for leaving it there. You cannot withdraw the money before that period ends without paying a penalty, usually a loss of some or all of the interest you would have earned.

CDs are different from regular savings accounts because the interest rate is locked in and usually higher. In exchange, your money is locked in too. The bank knows exactly how long it will hold your deposit, so it can offer better terms than it does for money you might pull out anytime.

The Federal Deposit Insurance Corporation (FDIC) insures CDs up to $250,000 per depositor per bank, the same as it does checking and savings accounts. That means if the bank fails, your money is protected up to that limit.

Key Takeaways

  • A CD locks your money away for a set term in exchange for a higher interest rate than a savings account offers.
  • You pay a penalty if you withdraw before the term ends, usually measured in months of lost interest.
  • Interest rates vary by bank, term length, and current market conditions — shopping around can add hundreds of dollars to what you earn.
  • CDs work best for money you know you will not need for several months or years, not for emergency funds.
  • When your CD matures, the bank will either return your principal plus interest or automatically roll it into a new CD at the current rate.

How Interest Rates and Terms Work

The interest rate a bank offers on a CD depends on how long you lock your money away and what the broader interest rate environment looks like. Longer terms usually pay more than shorter ones — a five-year CD might pay 4.5% while a three-month CD pays 3.2%, for example. But this is not a rule; it depends on what the Federal Reserve is doing and what banks expect to happen next.

The term is the period you agree to leave the money untouched. Common terms are three months, six months, one year, two years, three years, and five years. Some banks offer one-month or ten-year CDs, but those are less common. The longer the term, the more interest you earn in total dollars, but also the longer your money is locked away.

Interest rates change constantly. A CD you open today at 4.75% will keep paying 4.75% for its entire term, even if rates drop to 3% next month. That is the trade-off: you get certainty, but you also miss out if rates rise.

Penalties for Early Withdrawal

If you need your money before the CD matures, you will pay an early withdrawal penalty. The size of the penalty varies by bank and by the term of the CD. A common penalty is three to six months of interest, but some banks charge more, and a few charge less.

For example, if you have a one-year CD earning $100 in interest and you withdraw after six months, a three-month penalty means you lose $25 in interest and walk away with your original deposit plus $75. In some cases, especially with longer-term CDs, the penalty can be large enough that you actually lose part of your original deposit.

Before you open a CD, read the disclosure document the bank provides. It will state the exact penalty for your specific CD. Some banks also offer "no-penalty CDs" that let you withdraw early without a penalty, but they pay lower interest rates to offset that flexibility.

When a CD Matures and What Happens Next

When your CD reaches its maturity date, the bank stops paying interest and the term ends. At that point, you have a window — usually five to ten days — to decide what to do with the money. The bank will tell you the maturity date well in advance, usually in writing and sometimes by email.

You have three options: withdraw the money, move it to a different account at the same bank, or let it roll over into a new CD. If you do nothing, most banks automatically roll your CD into a new one at the current interest rate for the same term. That new rate might be higher or lower than what you were earning.

If you want to avoid an automatic rollover, you need to contact the bank before the maturity date and tell them what you want to do. Do not assume the bank will hold the money in a non-interest-bearing account if you miss the window — many will roll it over automatically, and you will be locked in again.

CD Rates Vary Widely Between Banks

The interest rate you earn on a CD depends heavily on which bank you choose. On the same day, one bank might offer 4.2% for a one-year CD while another offers 4.8%. Over a year, that 0.6% difference adds up to real money — on a $10,000 CD, it is $60.

Online banks and credit unions often pay higher rates than brick-and-mortar banks because they have lower overhead costs. A large national bank might pay 3.5% while an online bank pays 4.5% for the same term. Shopping around takes an hour and can earn you hundreds of dollars more.

Rates also change frequently. A rate that is competitive today might be below average in two weeks. If you are planning to open a CD, check rates at several banks — your current bank, online banks, and local credit unions — before you decide.

CDs Versus Savings Accounts and Money Market Accounts

A regular savings account lets you withdraw money anytime without penalty, but it pays much lower interest — often 0.01% to 0.5%. A CD pays more because you give up that flexibility. If you might need the money within a few months, a savings account is the right choice even if it pays less.

A money market account sits between the two. It usually pays more than a savings account but less than a CD, and it lets you withdraw money without penalty, though some have limits on how many withdrawals you can make per month. Money market accounts are useful if you want better returns than savings but more access than a CD offers.

The choice depends on your timeline and your comfort with locking money away. Emergency funds should stay in a savings account or money market account. Money you know you will not need for two years or more is a good candidate for a CD.

How to Open a CD

Opening a CD is straightforward. You choose a bank, pick a term and deposit amount, and the bank sets up the account. You can do this online, by phone, or in person at a branch. Most banks require a minimum deposit — often $500 to $2,500, though some have no minimum and others require $10,000 or more.

You will need to provide your name, address, Social Security number, and proof of identity, the same as you would for any bank account. If you are opening a CD online, you can usually complete the whole process in ten minutes. The bank will transfer the money from your checking or savings account, or you can mail a check.

Some banks offer special promotions on CDs — higher rates for a limited time, or bonuses for opening multiple CDs. These are worth watching for, but do not let a small bonus push you toward a bank with worse rates overall.

Frequently Asked Questions

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

No. A CD is a fixed deposit for a fixed amount. Once you open it, you cannot add more money to that CD. If you want to invest more, you would need to open a separate CD. Some banks let you open multiple CDs at the same time.

What happens if I need the money before the CD matures?

You can withdraw it, but you will pay an early withdrawal penalty. The penalty is usually three to six months of interest, though it varies by bank and term. Before you open a CD, confirm the exact penalty amount so you know what it will cost if an emergency comes up.

Are CDs safe?

Yes, as long as your deposit is under $250,000 and the bank is FDIC-insured. You can check whether a bank is FDIC-insured on the FDIC website. Your principal and interest are protected even if the bank fails.

Should I open a CD if interest rates are rising?

That depends on your timeline. If rates are rising and you lock in a CD now, you will miss out on higher rates later. But if you need a safe place for money you will not touch for several years, a CD still makes sense — you get a may provide return, even if rates rise.

What is the difference between a CD ladder and a CD?

A CD ladder is a strategy where you open multiple CDs with different maturity dates — one that matures in one year, one in two years, one in three years, and so on. As each one matures, you can reinvest at current rates. This spreads out your risk and gives you more flexibility than putting all your money in one long-term CD.