Opening a CD takes about 15 minutes online or in person, and you need three things: money to deposit, a valid ID, and a Social Security number or tax ID.

A CD (certificate of deposit) is a savings account where you agree to leave money untouched for a set period—usually three months to five years—in exchange for a fixed interest rate. The bank pays you that rate no matter what happens to market conditions. You pick the term length when you open it, and the interest rate is locked in from day one.

The actual opening process is straightforward. You choose a bank or credit union, decide how much to deposit and for how long, provide your identification, and fund the account. The money then sits earning interest until the maturity date arrives. On that date, you get your original deposit plus the interest earned, and you can either withdraw it or roll it into a new CD.

Key Takeaways

  • You can open a CD online, by phone, or in person at most banks and credit unions, and the process typically takes 15 to 30 minutes.
  • Interest rates on CDs vary by bank, term length, and deposit amount, so comparing rates across institutions before opening can add hundreds of dollars to your earnings.
  • Your money is locked in until the maturity date; withdrawing early usually costs you a penalty that eats into your interest or principal.
  • FDIC insurance covers CD deposits up to $250,000 per bank, so your money is protected even if the bank fails.

Gather your ID and decide on a deposit amount

Before you contact a bank, have your Social Security number or tax ID ready, a valid government-issued ID (driver's license or passport), and proof of your current address if opening in person. Some banks ask for this during the application; others verify it electronically.

Decide how much you want to deposit. CDs have minimum deposit requirements that vary by bank—some start at $500, others at $1,000 or $2,500. A few banks have no minimum. The amount you choose affects the interest rate you receive; larger deposits often earn slightly higher rates at the same bank.

Compare CD rates and terms across banks

Interest rates on CDs change constantly and differ significantly between banks. A CD paying 4.50% at one bank might pay 3.75% at another for the same term. Over a year, that difference adds up. Spend 10 minutes checking rates at three to five banks before you commit.

Look at banks you already use, online-only banks (which often pay higher rates because they have lower overhead), and your local credit union. Websites like Bankrate, DepositAccounts, and the banks' own sites show current rates. Write down the rate, the term length, and the minimum deposit for each option you're considering.

Also check whether the bank charges a penalty for early withdrawal. Most do, and the penalty varies—some charge a flat fee, others charge a certain number of months' interest. Knowing this upfront matters if your situation might change during the CD term.

Choose your CD term length

CD terms range from three months to five years or longer. Shorter terms (three to six months) usually pay lower interest rates but give you access to your money sooner. Longer terms (two to five years) typically pay higher rates but lock your money away longer.

Pick a term based on when you might need the money. If you're saving for something specific happening in 18 months, a one-year or 18-month CD makes sense. If you're parking money you won't touch for five years, a five-year CD lets you capture the highest available rate. If you're unsure, a one-year CD is a common middle ground—it pays better than short terms but doesn't commit you for too long.

Open the account online, by phone, or in person

Online: Go to the bank's website, find the CD product, and click to open. You'll enter your personal information, Social Security number, deposit amount, and term length. Most banks let you fund the account by linking a checking account or transferring money electronically. The account opens immediately, and your money moves within one to three business days.

By phone: Call the bank's customer service number and ask to open a CD. A representative walks you through the same questions, takes your information, and arranges the funding. This takes 15 to 20 minutes. Ask them to email or mail you a confirmation with the rate, term, and maturity date.

In person: Visit a branch with your ID, Social Security number, and the amount you want to deposit (as a check or transfer). A banker fills out the paperwork, answers questions about early withdrawal penalties, and processes the account on the spot. You leave with a receipt showing your rate and maturity date.

Fund your CD and confirm the details

Once you've chosen your bank and term, you need to move money into the account. If you opened online, link your checking account or arrange a wire transfer. If you opened in person, you can hand over a check or authorize a transfer from another account. If you opened by phone, the bank tells you how to send the money—usually a bank transfer or check.

After the money arrives, the bank sends you a confirmation. Read it carefully. It should show your deposit amount, the interest rate, the term length, the maturity date, and the early withdrawal penalty. Save this document. You'll need it if you ever need to contact the bank about the CD or if you want to know exactly when it matures.

Understand what happens when your CD matures

On the maturity date, your CD stops earning interest. The bank then gives you three options: withdraw the money, let it automatically roll into a new CD at the current rate, or move it to a savings account. Most banks automatically roll CDs into new ones at the current rate unless you tell them otherwise.

If you want to withdraw the money or move it somewhere else, contact the bank before the maturity date and tell them your choice. If you miss the window (usually a week or two after maturity), the bank rolls it forward automatically. You can still withdraw it after that, but you'll have started a new CD term.

Frequently Asked Questions

Can I withdraw money from a CD before it matures?

Yes, but you'll pay an early withdrawal penalty. The penalty varies by bank and term length—it might be a flat fee or a certain number of months' interest. For example, a $10,000 CD earning 4% annually might cost you $100 to $200 to withdraw early. Check the penalty before opening so you know the cost if your situation changes.

What if I want to open multiple CDs?

You can open as many CDs as you want at the same bank or different banks. Each CD is insured separately up to $250,000 by the FDIC (or NCUA if it's a credit union), so spreading money across multiple CDs protects larger amounts. Some people open CDs with different maturity dates so money becomes available at different times.

Do I need to do anything while my CD is earning interest?

No. Once your CD is open and funded, it earns interest automatically. You don't need to check on it or take any action until the maturity date arrives. The bank handles everything.

Is my money safe in a CD?

Yes. CDs at FDIC-insured banks are protected up to $250,000 per depositor per bank. Credit union CDs are protected the same way by the NCUA. This means if the bank fails, the government guarantees your money back.

What's the difference between opening a CD at a bank versus a credit union?

Credit unions are member-owned nonprofits, while banks are for-profit. Credit unions sometimes pay slightly higher CD rates and may have lower minimum deposits. Both offer the same FDIC/NCUA insurance protection. If you're a member of a credit union, compare their CD rates to banks before deciding.