A CD locks your money away for a set time in exchange for a higher interest rate
A certificate of deposit (CD) is a savings product where you give a bank a lump sum of money and agree not to touch it for a specific period—usually anywhere from three months to five years. In return, the bank pays you a fixed interest rate that is almost always higher than what you'd earn in a regular savings account. The bank uses your money during that time, and you get paid for letting them do it.
The core trade-off is simple: you get a better interest rate, but your money is locked up. If you withdraw before the agreed date ends, you pay a early withdrawal penalty—typically a few months' worth of the interest you would have earned. This penalty exists because the bank has already committed your money to loans or investments based on the assumption you'd leave it there.
When your CD reaches its maturity date (the end of the term), you get your original money back plus all the interest earned. At that point, you can withdraw it, move it to another account, or open a new CD with the same bank or a different one.
Key Takeaways
- A CD pays a fixed interest rate in exchange for you leaving money untouched for a set period, usually three months to five years.
- The interest rate on a CD is higher than a regular savings account because the bank knows exactly how long it can use your money.
- Withdrawing early triggers a penalty, usually equal to a few months of interest, which is why CDs work best for money you won't need soon.
- When the CD matures, you receive your full deposit plus all earned interest, and you can then decide what to do with the money.
- CDs are FDIC-insured up to $250,000 per depositor per bank, so your principal is protected even if the bank fails.
How the interest rate gets locked in and stays the same
When you open a CD, the bank tells you the exact interest rate you'll earn for the entire term. That rate does not change, no matter what happens to interest rates in the economy. If you open a one-year CD at 4.5% and rates drop to 2% six months later, you still earn 4.5%. If rates jump to 6%, you still earn 4.5%.
This predictability is one reason people choose CDs. You know exactly how much money you'll have at the end. If you deposit $5,000 in a one-year CD at 4.5%, you will have $5,225 when it matures (before taxes). There are no surprises.
The trade-off is that if rates rise significantly, you're stuck earning the lower rate you locked in. This is why CD rates vary depending on how long you're willing to commit. A five-year CD usually pays more than a one-year CD because you're giving up the chance to move your money if rates go up.
Why banks offer higher rates on CDs than savings accounts
A regular savings account lets you withdraw money whenever you want. That flexibility costs the bank money because they can't reliably plan how much of your deposit they can lend out or invest. With a CD, the bank knows your money will sit there for months or years, so they can confidently lend it to someone buying a house or a business expanding. That certainty lets them offer you a higher rate.
The longer the CD term, the more the bank can do with your money, so longer terms usually pay more. A six-month CD might pay 4%, but a three-year CD from the same bank might pay 4.8%. The bank is willing to pay extra for the longer commitment.
What happens when your CD reaches maturity
On the maturity date, your CD stops earning interest. At that point, the bank will either automatically renew the CD for another term at the current rate, or deposit your money into a linked savings account. The exact process depends on what you chose when you opened it.
Most banks give you a grace period—usually 7 to 10 days after maturity—to decide what you want to do. During that window, you can withdraw the money without penalty, move it to another account, or let it roll into a new CD. If you do nothing and the grace period passes, many banks will automatically renew it at whatever rate they're currently offering.
This automatic renewal is easy to miss. If you don't want your money locked up again, mark your calendar for the maturity date and contact your bank before the grace period ends.
The early withdrawal penalty and when it applies
If you need your money before the maturity date, you can withdraw it, but you'll pay a penalty. The penalty amount varies by bank and by CD term. A typical penalty on a one-year CD might be three months of interest; on a five-year CD, it might be six months or a year of interest.
The penalty comes out of your earnings first. If you've earned $200 in interest and the penalty is $150, you get your full $5,000 deposit back plus $50 in interest. If you withdraw very early and haven't earned enough interest to cover the penalty, the bank takes the difference from your principal—meaning you get back less than you deposited.
Some banks offer "no-penalty CDs" that let you withdraw without a penalty, but these pay lower interest rates to compensate. They're useful if you think you might need the money but want something safer than a savings account.
How much interest you actually earn depends on the rate and the term
The amount of interest a CD earns depends on three things: how much you deposit, what interest rate the bank offers, and how long the money sits there. Banks calculate interest in different ways—some compound daily, some monthly, some quarterly. More frequent compounding means slightly more money in your pocket, but the difference is usually small.
You can use a CD calculator (most banks have one on their website) to see exactly how much you'll have at maturity. Plug in your deposit amount, the rate, and the term, and it shows you the total. This helps you compare CDs from different banks or different term lengths.
Keep in mind that the interest you earn is taxable income. If you earn $225 in interest, you'll owe income tax on that $225. Some people keep CDs in retirement accounts like IRAs to defer that tax, though those accounts have their own rules about withdrawals.
CD laddering: a way to balance safety with access to your money
One strategy people use to get higher CD rates without locking all their money away for years is called CD laddering. You open multiple CDs with different maturity dates—for example, a one-year, two-year, three-year, and four-year CD, each with the same amount of money. Every year, one CD matures, and you can either withdraw that money or open a new four-year CD.
This approach gives you regular access to chunks of your money while still earning the higher rates that longer terms offer. If you need cash unexpectedly, you wait at most a year instead of being completely locked in. If rates rise, you can reinvest maturing CDs at the new higher rates instead of being stuck with an old rate for years.
Laddering works best if you have a larger amount to split across multiple CDs and you're comfortable managing several accounts. For smaller deposits or simpler situations, a single CD or a mix of CDs and savings accounts might make more sense.
Frequently Asked Questions
Can I withdraw money from a CD before it matures?
Yes, but you'll pay an early withdrawal penalty. The penalty is usually a few months of interest, though it varies by bank and CD term. If you withdraw very early, the penalty might exceed the interest you've earned, and you could get back less than you deposited. Some banks offer no-penalty CDs that let you withdraw without a fee, but they pay lower rates.
What happens to my money if the bank fails?
Your CD is protected by FDIC insurance up to $250,000 per depositor per bank. If the bank fails, the FDIC steps in and makes sure you get your full deposit plus any earned interest, up to that limit. This protection applies whether your money is in a CD, savings account, or checking account at the same bank.
Is a CD a good place to put money I might need soon?
No. CDs work best for money you won't need for months or years. If there's any chance you'll need the cash within the CD term, the early withdrawal penalty will eat into your earnings or principal. For money you might need soon, a regular savings account or money market account is safer, even though the rate is lower.
Do I have to renew my CD when it matures?
No. When your CD matures, you can withdraw the money, move it to another account, or open a new CD. Most banks give you a grace period of 7 to 10 days to decide. If you don't act during that window, many banks will automatically renew the CD at their current rate, so check your maturity date and contact the bank if you want to do something different.
How do CD rates compare to savings account rates?
CD rates are almost always higher than savings account rates at the same bank because you're committing your money for a set period. The exact difference varies depending on current economic conditions and how long the CD term is. You can compare rates across banks on financial websites, though rates change frequently.