A CD is a savings account where you lock up your money for a set time in exchange for a higher interest rate
A certificate of deposit is a product your bank offers where you give them a lump sum of money and agree not to touch it for a fixed period — usually three months to five years. In return, the bank pays you a higher interest rate than you'd get in a regular savings account. When the time is up, you get your original money back plus the interest earned.
The trade-off is straightforward: you lose access to your cash during the term. If you withdraw early, the bank charges you a penalty, usually a few months' worth of interest. This penalty is why CDs work best for money you genuinely won't need soon.
CDs are FDIC insured at most banks, meaning if the bank fails, the government guarantees your deposit up to $250,000. This makes them one of the safest places to put money, though the interest rate is still modest compared to stocks or bonds.
Key Takeaways
- You deposit a fixed amount of money for a fixed period and receive a may provide interest rate that does not change.
- Early withdrawal penalties typically cost you several months of interest, so only use a CD for money you will not need during the term.
- CD rates vary by bank, by term length, and by the amount you deposit — shopping around can add hundreds of dollars to your return.
- FDIC insurance protects your deposit up to $250,000 if the bank fails, but does not protect you from inflation or opportunity cost.
How the interest rate and term length work together
When you open a CD, you choose how long to lock up your money. Common terms are three months, six months, one year, two years, three years, and five years. The longer the term, the higher the interest rate the bank will offer you — this is the bank's way of compensating you for giving up access longer.
The interest rate is fixed, meaning it does not move up or down while your CD is open. If you open a one-year CD at 4.5 percent, you will earn 4.5 percent for the full year, even if interest rates rise to 5.5 percent halfway through. This is why timing matters: if rates are climbing, a short-term CD lets you reinvest at a higher rate sooner.
Interest compounds, usually daily or monthly depending on the bank. Compounding means the interest you earn also earns interest. Over a five-year CD, this compounds to a meaningful difference, though the effect is smaller on shorter terms.
What happens when your CD matures
When your term ends, the CD matures. The bank deposits your original money plus all the interest into your checking or savings account. You now have full access to the cash.
Most banks have a grace period — usually seven to ten days — during which you can decide what to do next. You can withdraw the money, move it to another account, or open a new CD. If you do nothing during the grace period, many banks automatically roll the money into a new CD at the current rate. Read your CD agreement to know your bank's policy, because automatic renewal can lock you in at a lower rate if interest has fallen.
Some banks let you set up a "CD ladder" by opening multiple CDs with different maturity dates. This way, one CD matures every few months, giving you regular access to portions of your money without the early withdrawal penalty.
Early withdrawal penalties and when they explore
If you need your money before the term ends, you can withdraw it, but the bank will charge you a penalty. The penalty is usually expressed as a number of months of interest — for example, "three months' interest" or "six months' interest." On a $10,000 CD earning 4 percent annually, three months' interest is about $100.
The penalty comes out of your interest earnings first. If you have not earned enough interest yet, the penalty eats into your principal. This is why withdrawing early from a short-term CD can mean you get back less than you put in.
Some banks offer "no-penalty CDs" that let you withdraw without a penalty, but these come with a lower interest rate to compensate the bank for the flexibility. Whether a no-penalty CD makes sense depends on whether you truly might need the money — if you will not touch it, the higher rate on a regular CD is better.
Shopping for CDs: rates, terms, and where to look
CD rates vary widely by bank and by the amount you deposit. A large national bank might offer 3.5 percent on a one-year CD, while an online bank or credit union might offer 4.8 percent for the same term. Over a year, that difference adds up: on a $25,000 CD, the higher rate earns you $325 more.
Online banks and credit unions typically offer higher rates than brick-and-mortar banks because they have lower overhead costs. Your own bank may match a competitor's rate if you ask, but you have to shop first to know what to ask for.
The amount you deposit also affects the rate. Some banks offer higher rates on "jumbo CDs" — usually $100,000 or more. Others offer promotional rates for new customers or for opening multiple CDs at once. Websites like Bankrate, DepositAccounts, and your state's credit union league let you compare rates across institutions in minutes.
CDs versus savings accounts and money market accounts
A regular savings account has no term and no penalty for withdrawal, but the interest rate is much lower — often under 0.5 percent. You have complete flexibility but earn almost nothing. A CD locks you in but pays two to four times as much interest.
A money market account sits between the two. It offers a higher rate than a savings account and some withdrawal flexibility, but usually limits how many withdrawals you can make per month. Money market accounts are useful if you want slightly higher returns without fully locking up your money, but the rate is still lower than a CD.
Choose a CD if you have money you will not need for at least six months and want the highest may provide return. Choose a savings account if you need to access the money frequently. Choose a money market account if you want something in between.
Tax treatment and inflation considerations
The interest you earn on a CD is taxable income. If you earn $500 in CD interest in a year, you owe federal income tax on that $500. The bank will send you a 1099-INT form in January showing how much interest you earned. State income tax may also explore depending on where you live.
This matters because it reduces your real return. If you earn 4.5 percent on a CD and you are in the 24 percent federal tax bracket, your after-tax return is closer to 3.4 percent. If inflation is running at 3 percent, your real gain is only 0.4 percent — you are barely staying ahead of rising prices.
CDs work best when inflation is low and interest rates are high. When inflation is high and rates are low, the real return can be negative, meaning your money loses purchasing power even though the dollar amount grows.
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. Some banks offer no-penalty CDs that let you withdraw without a fee, but these have lower interest rates. Check your CD agreement to know the exact penalty before you open one.
What is the difference between a CD and a savings account?
A savings account has no term and no penalty, but pays very low interest — often under 0.5 percent. A CD locks your money for a set time and pays two to four times as much interest. Choose a CD if you will not need the money for months or years. Choose a savings account if you need regular access.
Are CDs safe if the bank fails?
Yes. CDs are FDIC insured up to $250,000 per depositor per bank. If the bank fails, the government guarantees you get your money back. If you have more than $250,000, spread it across multiple banks to stay within the insurance limit.
What happens to my CD when it matures?
The bank deposits your principal plus interest into your account. Most banks give you a grace period of seven to ten days to decide what to do next. If you do nothing, many banks automatically roll the money into a new CD at the current rate. Check your agreement to know your bank's policy.
Do I have to pay taxes on CD interest?
Yes. CD interest is taxable income. The bank sends you a 1099-INT form showing how much you earned, and you report it on your tax return. This reduces your real return, especially if you are in a high tax bracket or inflation is high.