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 (CD) is a bank account that pays you more interest than a regular savings account, but only if you leave your money untouched for a specific period. You choose the term when you open it — typically three months, six months, one year, or five years. The bank holds your money for that entire time. When the term ends, you get your deposit back plus the interest you earned.
The tradeoff is simple: longer lock-up, higher interest rate. A one-year CD pays more than a three-month CD at the same bank. If you need the money before the term ends, you pay an early withdrawal penalty — usually a few months' worth of interest, though the exact amount depends on the bank and the CD term.
CDs are FDIC-insured up to $250,000 per depositor per bank, the same as regular savings accounts. Your money is safe even if the bank fails. The interest rate is fixed for the entire term, so you know exactly what you'll earn when you open the account.
Key Takeaways
- A CD locks your money for a set term (three months to five years) and pays a fixed interest rate that is higher than a regular savings account.
- You can withdraw your money early, but you will pay a penalty — usually several months of interest — that reduces or eliminates your earnings.
- CD interest rates vary by bank and term length; shopping around can mean hundreds of dollars more in earnings on the same deposit.
- Your CD is FDIC-insured up to $250,000, so your principal is protected even if the bank fails.
- When your CD matures, the bank automatically renews it at the current rate unless you tell them to do something else with the money.
How CD interest rates and terms work together
The interest rate on a CD is set when you open the account and does not change. A bank might offer 4.5% on a one-year CD and 5.2% on a five-year CD. You choose which term fits your situation. The longer you commit your money, the higher the rate usually is — the bank is paying you for the certainty that your deposit will stay put.
Interest compounds according to the bank's schedule: daily, monthly, or quarterly. Compounding means you earn interest on your interest. A $10,000 CD at 5% compounded daily will earn slightly more than one compounded monthly, though the difference is small on shorter terms.
When your CD matures (the term ends), the bank sends you a notice. You then have a window — usually 7 to 10 days — to decide what to do. You can withdraw the money, move it to another account, or let the bank automatically renew it into a new CD at whatever rate they are currently offering. If you do nothing, renewal happens automatically, and you are locked in again for another term at the new rate.
What happens if you need your money early
Early withdrawal penalties exist because the bank is counting on keeping your deposit for the full term. If you pull money out before maturity, you forfeit some or all of the interest you earned. The penalty amount is set by the bank and disclosed when you open the account.
A typical penalty on a one-year CD might be three months of interest. On a $10,000 CD earning 5%, that is roughly $125. On a five-year CD, the penalty might be one year of interest — $500. Some banks charge a flat fee instead, like $25 or $50, regardless of the term.
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 means you can end up with less money than you deposited. Before you open a CD, read the disclosure document to see exactly what the early withdrawal penalty is.
CD laddering: a strategy for access and higher rates
If you want higher interest rates but also need regular access to your money, you can use a strategy called CD laddering. You divide your money into multiple CDs with different maturity dates. For example, you might buy five $2,000 CDs with terms of one, two, three, four, and five years.
Each year, one CD matures. You can withdraw that money if you need it, or roll it into a new five-year CD to keep the ladder going. This way, you earn the higher rates that longer-term CDs offer, but you have access to a portion of your money every year without paying a penalty.
Laddering works best when interest rates are stable or rising. If rates are falling, you may end up renewing CDs at lower rates. If rates are rising, you benefit from reinvesting maturing CDs at the new, higher rates.
Shopping for CDs: where rates vary and how much it matters
CD rates differ significantly between banks. A large national bank might offer 4.0% on a one-year CD, while an online bank offers 5.1% for the same term. On a $10,000 deposit, that difference is $110 in extra earnings over one year — money that stays in your pocket if you shop around.
Online banks and credit unions typically offer higher rates than brick-and-mortar banks because they have lower overhead costs. You can compare rates on sites that list CDs from multiple banks, though you will need to visit each bank's website to open the account. There is no single application process; each bank handles its own.
When comparing, pay attention to the term length and the compounding frequency. A CD that compounds daily will earn slightly more than one that compounds monthly, all else equal. Also check whether the bank charges a monthly maintenance fee — some do, which eats into your earnings.
CDs versus high-yield savings accounts and money market accounts
A high-yield savings account has no lock-up period. You can withdraw money anytime without penalty, and the interest rate is variable — it can go up or down. Right now, high-yield savings accounts often pay nearly as much as CDs, sometimes more. If you might need your money within a year, a high-yield savings account is more flexible.
A money market account is a hybrid. It offers a higher interest rate than a regular savings account and some check-writing ability, but it may have withdrawal limits and minimum balance requirements. Money market rates are also variable.
Choose a CD if you have money you will not need for a specific period and want to lock in a may provide rate. Choose a high-yield savings account if you want flexibility and current rates are competitive. Choose a money market account if you want something between the two.
What to know about CD maturity and renewal
Your CD maturity date is the day your term ends. The bank will notify you in advance — usually 30 days before. At that point, you have options: withdraw the money, move it to another account at the same bank, or let it renew automatically.
If you do nothing, the bank renews your CD into a new term of the same length at whatever rate they are currently offering. This rate may be higher or lower than what you earned before. Some banks send a notice with the new rate before renewal happens; others do not. Check your account or call the bank to see what rate you are being renewed into before the renewal takes effect.
If you do not want to renew, you must contact the bank before the maturity date or during the grace period (usually 7 to 10 days after maturity). After the grace period ends, your money is locked in again. If you miss the window, you will have to pay an early withdrawal penalty to access your funds.
Frequently Asked Questions
Can I add money to a CD after I open it?
No. A CD is a fixed deposit. You choose the amount when you open it, and that amount stays the same for the entire term. You cannot add to it or withdraw from it without paying the early withdrawal penalty. If you want to invest more money at the same rate, you must open a separate CD.
What if interest rates go up after I buy a CD?
Your CD rate stays the same for the entire term — that is the point of a fixed rate. If rates rise, you are locked into the lower rate. When your CD matures, you can reinvest at the new, higher rate. If you need to access the higher rate sooner, you can withdraw early and pay the penalty, but that usually costs more than waiting.
Is a CD safe if the bank fails?
Yes. CDs are FDIC-insured up to $250,000 per depositor per bank. If the bank fails, the FDIC pays you back your principal plus accrued interest up to that limit. You do not lose money because of bank failure.
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. The bank will send you a 1099-INT form at tax time showing how much interest you earned. You report this on your tax return.
What happens if I need my money before the CD matures?
You can withdraw it, but you will pay an early withdrawal penalty set by the bank. The penalty is usually a few months of interest. Read your CD disclosure to see the exact penalty before you open the account, so you know the cost if you need the money early.