The basic steps to open and fund a CD
To invest in a CD, you pick a bank or credit union, choose a term length and interest rate, deposit your money, and then leave it untouched until maturity. The process takes about 15 to 30 minutes online or in person. You'll need a valid ID, your Social Security number, and the cash or a linked bank account to fund the deposit.
Most banks let you open a CD entirely online without visiting a branch. You'll select the term (3 months, 6 months, 1 year, 5 years, and so on), see the interest rate locked in for that term, confirm the deposit amount, and fund it from a checking or savings account you already own. The CD opens immediately, and your money starts earning the stated rate right away.
The key constraint is that you cannot withdraw the money before the maturity date without paying an early withdrawal penalty. That penalty varies by bank and term length—some charge three months of interest, others charge six months or a flat fee. Before you fund a CD, check what the penalty is and make sure you won't need that money before the term ends.
Key Takeaways
- You can open a CD online at most banks in under 30 minutes by providing your ID, Social Security number, and a funding source.
- The interest rate is locked in for the entire term, so rates available when you open the CD are the rates you earn, regardless of what happens to market rates later.
- Early withdrawal penalties vary by institution and term length, so confirm the penalty before you deposit and only use money you won't need before maturity.
- CD terms range from three months to five years or longer, and longer terms typically offer higher interest rates than shorter ones.
- You can open multiple CDs at the same bank or spread them across different banks to diversify your rates and maturity dates.
Where to open a CD and what to compare
You can open a CD at any bank, credit union, or online-only bank. The main difference is that online banks typically offer higher interest rates because they have lower overhead costs. A brick-and-mortar bank near you might offer 4.5% on a one-year CD, while an online bank might offer 5.0% for the same term. Over a year, that 0.5% difference adds up.
When comparing CDs, look at three things: the annual percentage yield (APY), the term length, and the early withdrawal penalty. The APY is the rate you'll actually earn, including any compounding. The term is how long your money is locked in. The penalty is what you'll lose if you need the money early. A CD with a slightly lower rate but a lower penalty might be better if you're uncertain about keeping the money untouched.
Use a CD comparison tool or visit the websites of three to five banks you're considering. Write down the APY, term, and penalty for each one. You don't need the absolute highest rate—a difference of 0.1% or 0.2% is often negligible—but you do want to avoid banks with unusually high penalties or terms that don't match your timeline.
How to fund your CD
Most banks let you fund a CD from a checking or savings account at the same institution or from an external account. If you're opening a CD at a new bank, you'll link your existing account by providing the routing number and account number. The bank will verify the account by depositing two small amounts (usually under $1 each) and asking you to confirm those amounts. This takes one to two business days.
Alternatively, you can fund a CD by transferring money from another bank using an ACH transfer, which typically clears within one to three business days. Some banks also accept wire transfers, which are faster but may carry a small fee. A few banks still allow you to fund a CD in person with a check or cash if you visit a branch.
The deposit amount varies by bank. Most require a minimum of $500 to $1,000, though some online banks accept $100 or less. A few banks have no minimum. Check the minimum before you open the CD so you don't run into a surprise.
Understanding CD ladders and multiple CDs
A CD ladder is a strategy where you open multiple CDs with different maturity dates so that one matures every few months or every year. For example, you might open a one-year CD, a two-year CD, and a three-year CD on the same day. When the one-year CD matures, you can withdraw the money, reinvest it in a new three-year CD, or use it for something else. This approach gives you regular access to portions of your money without the penalty of early withdrawal.
CD ladders work best when interest rates are stable or rising. If rates are falling, you lock in higher rates on the longer-term CDs. If rates are rising, you get to reinvest maturing CDs at the new higher rates. You don't need a special account or permission to build a ladder—you simply open multiple CDs at the same bank or spread them across different banks.
You can also open multiple CDs at the same bank with the same maturity date if you want to diversify your rate or test different terms. There's no limit to how many CDs you can own, and each one is insured separately by the FDIC (up to $250,000 per depositor, per bank, per term length) or the NCUA (for credit unions).
What happens when your CD matures
When your CD reaches its maturity date, the bank will notify you by mail or email. You then have a grace period—usually 7 to 10 days—to decide what to do with the money. During that window, you can withdraw the funds, let the CD automatically renew at the current rate, or move the money to a different product.
If you do nothing, most banks automatically renew the CD at the current interest rate for the same term length. That new rate might be higher or lower than what you earned before. To avoid an unwanted renewal, contact the bank before the grace period ends and request a withdrawal or a transfer to a savings account.
When you withdraw the money at maturity, there is no penalty. You get your full principal plus all the interest you earned. If you withdraw before maturity, you'll lose some or all of the interest as a penalty, depending on the bank's terms.
FDIC insurance and safety
CDs at banks are insured by the FDIC (Federal Deposit Insurance Corporation) up to $250,000 per depositor, per bank, per term length. This means if the bank fails, you get your money back up to that limit. CDs at credit unions are insured by the NCUA (National Credit Union Administration) with the same $250,000 limit.
If you want to insure more than $250,000, you can open CDs at multiple banks. Each bank's FDIC insurance is separate, so $250,000 at Bank A and $250,000 at Bank B are both fully insured. You can also open CDs in different term lengths at the same bank and each term is insured separately—a one-year CD and a two-year CD at the same bank are two separate $250,000 pools.
This insurance applies only to the principal and accrued interest. It does not protect you from interest rate risk (the risk that rates will rise after you lock in a lower rate) or inflation risk (the risk that inflation will outpace your earnings). Those are trade-offs you accept when you choose a CD over other investments.
Common mistakes to avoid when investing in CDs
The most common mistake is opening a CD without checking the early withdrawal penalty. Some banks charge six months of interest, which can wipe out most or all of your earnings if you need the money in a few months. Before you fund a CD, write down the penalty and ask yourself honestly whether you might need that money before maturity.
Another mistake is opening a CD at a bank with a very low rate just because it's convenient. If your current bank offers 3.5% on a one-year CD and an online bank offers 5.0%, the online bank is worth the small effort to set up. Over a year on $10,000, that difference is $150 in extra earnings.
A third mistake is letting a CD renew automatically at a low rate without checking current rates. When your CD matures, take 10 minutes to see what other banks are offering. If rates have risen, you can move your money to a better rate. If rates have fallen, your old rate might still be competitive.
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 three to six months of interest, though some banks charge a flat fee. The exact penalty depends on the bank and the term length. Check the penalty before you open the CD, and only deposit money you won't need before maturity.
What's the difference between a CD and a savings account?
A CD locks your money in for a set term and pays a higher interest rate in exchange. A savings account lets you withdraw money anytime without penalty but pays a lower rate. CDs are better for money you don't need soon; savings accounts are better for emergency funds or money you might need quickly.
Do I have to pay taxes on CD interest?
Yes. CD interest is taxable income. The bank will send you a 1099-INT form at the end of the year if you earned $10 or more in interest. You report this on your tax return. Some people open CDs in tax-advantaged accounts like IRAs to avoid or defer taxes on the earnings.
What happens if the bank fails while I have a CD?
The FDIC insures your CD up to $250,000, so you'll get your money back even if the bank fails. The FDIC will either transfer your CD to another bank or pay you directly. This process usually takes a few weeks. You don't lose any earnings you've accrued up to the point of failure.
Can I open a CD with money from a credit card or loan?
Technically yes, but it's usually not a good idea. If you borrow money at 15% interest to open a CD earning 5%, you're losing 10% per year. Only open a CD with money you already own or can transfer from a checking or savings account.