The basic steps to open a CD account
Buying a CD means giving a bank or credit union a lump sum of money for a set period—usually three months to five years—in exchange for a fixed interest rate. You pick the term length, deposit your money, and the bank holds it until maturity. On the maturity date, you get your principal back plus the interest earned.
The process itself is straightforward: choose a bank or credit union, pick a CD term and deposit amount, provide identification and funding information, and sign the account agreement. Most banks let you open a CD online in 10 to 15 minutes. Some require you to visit a branch or call, but online is fastest.
The hardest part is not the mechanics—it's deciding which CD fits your timeline and comparing rates across institutions. Banks compete heavily on CD rates, and the difference between a 4.5% rate and a 5.2% rate on a $10,000 CD over one year is real money.
Key Takeaways
- You can open a CD online, by phone, or in person at a bank or credit union, and most online banks complete the process in under 15 minutes.
- CD rates vary significantly between institutions, so comparing rates across at least three banks before depositing is worth the 10 minutes it takes.
- You must choose a term length (three months to five years typically) and a deposit amount before opening the account, and you cannot change either without penalty.
- Your CD is insured up to $250,000 per depositor per bank by the FDIC (or NCUA at credit unions), so your money is protected even if the institution fails.
- Early withdrawal penalties vary by bank and term length, so read the account agreement before depositing to understand what you owe if you need the money before maturity.
Where to open a CD: online banks versus brick-and-mortar
Online banks typically offer higher CD rates than traditional banks because they have lower overhead costs. Banks like Marcus, Ally, and American Express Personal Savings are common sources for competitive rates. You open the account entirely online, fund it by transferring money from another bank account, and receive statements electronically.
Traditional banks—the ones with physical branches—usually offer lower rates but may offer perks like in-person service or the ability to open a CD at a teller window. Credit unions often fall between the two in terms of rates, and membership requirements vary. Some credit unions are open to anyone in a geographic area; others require you to work for a specific employer or belong to a specific organization.
If you already have a checking account at a bank, opening a CD there is convenient but may not give you the best rate. Spending 15 minutes comparing rates at three online banks often yields 0.25% to 0.75% more interest, which compounds over the term.
Comparing CD rates and terms before you commit
CD rates change daily, sometimes multiple times per day. Before you open an account, check the current rates at several banks. Websites like Bankrate, DepositAccounts, and the banks' own sites show current rates for different term lengths.
When comparing, look at the Annual Percentage Yield (APY), not just the interest rate. APY accounts for how often interest compounds and gives you the true return. A CD advertising 5.0% APY will earn you more than one advertising 5.0% interest compounded annually.
Also check the minimum deposit required. Some banks require $500; others require $25,000 or more. If a bank's rate is attractive but the minimum is higher than you can deposit, move to the next option. The rate difference has to be large enough to justify the inconvenience of opening an account at a less convenient institution.
What you need to open a CD account
You will need a valid government-issued photo ID (driver's license, passport, or state ID), your Social Security number, and your current address. The bank uses this information to verify your identity and comply with federal anti-money-laundering rules.
You will also need a way to fund the CD. Most online banks accept transfers from another bank account (the fastest method, usually completing within one business day). Some accept wire transfers, checks, or ACH transfers. If you are opening a CD at a physical branch, you can often hand over cash or a check directly.
Have your funding bank's routing number and your account number ready if you are transferring money electronically. You can find these on a check or by logging into your bank's website.
Understanding early withdrawal penalties and what happens at maturity
CDs lock your money away for the term you choose. If you withdraw before maturity, the bank charges a penalty, usually expressed as a number of months of interest. A CD with a three-month penalty means you lose three months' worth of the interest you would have earned. On a $10,000 CD earning 5% APY, that penalty is roughly $125.
Read the account agreement before you deposit to see the exact penalty. Some banks offer "no-penalty CDs" with lower rates but no early withdrawal fee—a trade-off worth considering if you are unsure whether you will need the money.
When your CD reaches maturity, the bank automatically renews it at the current rate unless you tell them otherwise. If rates have dropped, you may not want to renew at the new rate. Most banks give you a grace period (usually 7 to 10 days) to withdraw the money or move it elsewhere without penalty. Check your account agreement for the exact window.
Funding your CD and confirming the account is open
Once you have chosen a bank and term, you will enter the deposit amount and authorize the transfer. If you are transferring from another bank, the money typically arrives within one to two business days. The bank will send you a confirmation email with the CD details: the principal amount, the APY, the maturity date, and the penalty for early withdrawal.
Save this confirmation. You will need it to reference the maturity date and to know what to expect when the CD matures. Some banks also send a physical statement by mail, but email confirmations are standard.
Once the money arrives and the CD is open, you cannot deposit more money into that CD. If you want to add to your savings in a CD, you will need to open a separate CD account. This is why some people open multiple CDs on a staggered schedule—called a "CD ladder"—to have money maturing at different times.
FDIC insurance and protecting your deposit
Your CD is protected by the Federal Deposit Insurance Corporation (FDIC) if you opened it at a bank, or by the National Credit Union Administration (NCUA) if you opened it at a credit union. This insurance covers up to $250,000 per depositor per institution. If the bank fails, you get your money back.
If you have more than $250,000 to deposit, you can spread it across multiple banks to keep each deposit under the insurance limit. For example, $300,000 split between two banks ($150,000 each) is fully insured at both institutions.
This protection is automatic—you do not need to register or do anything extra. It applies the moment the CD is opened.
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 a set number of months of interest. For example, a three-month penalty on a $10,000 CD earning 5% APY costs about $125. Some banks offer no-penalty CDs with lower rates, which let you withdraw without a fee.
What is the difference between a CD and a savings account?
A CD locks your money for a fixed term and pays a higher interest rate in exchange. A savings account lets you withdraw anytime but pays lower interest. CDs are better if you do not need the money for several months or longer; savings accounts are better if you want flexibility.
How long does it take to open a CD?
Online CDs usually take 10 to 15 minutes to open. The money transfer from your other bank account takes one to two business days. At a physical branch, opening takes 15 to 30 minutes, and you can fund it immediately with cash or a check.
What happens when my CD matures?
The bank automatically renews your CD at the current rate unless you tell them otherwise. Most banks give you a 7 to 10-day grace period to withdraw the money or move it without penalty. Check your account agreement for the exact window at your bank.
Is my CD safe if the bank fails?
Yes. The FDIC insures CDs at banks up to $250,000 per depositor per institution. Credit union CDs are insured by the NCUA up to the same limit. If the institution fails, you get your principal and accrued interest back.