What happens when you open a CD

When you open a CD at a bank, you give the bank a sum of money for a fixed period of time — typically three months to five years. In exchange, the bank pays you a set interest rate, which is usually higher than what you'd earn in a regular savings account. The bank uses your money during that time and returns both your original deposit and the interest when the term ends.

The interest rate is locked in on the day you open the CD. If rates rise after you've opened it, your rate stays the same. If rates fall, you're protected by your higher rate. This predictability is the main reason people choose CDs — you know exactly how much money you'll have at maturity.

Key Takeaways

  • You deposit a fixed amount of money for a set period, and the bank pays you a may provide interest rate that does not change.
  • Your money is locked in until the maturity date; withdrawing early usually costs you a penalty that reduces or eliminates your interest earnings.
  • The interest rate depends on the CD term length, current market rates, and the bank's own pricing — rates vary significantly between institutions.
  • CDs are insured by the FDIC up to $250,000 per depositor per bank, so your principal is protected even if the bank fails.
  • When your CD matures, you can withdraw the money, open a new CD, or let it roll over into another term at the bank's current rate.

How the interest rate is set and what it depends on

Banks set CD rates based on what the Federal Reserve is doing with short-term interest rates, what other banks are offering, and how much money the bank needs to attract. A CD with a three-month term will almost always pay less than a one-year CD at the same bank, because you're locking your money up for longer and the bank can use it longer. Online banks typically offer higher rates than brick-and-mortar banks because they have lower overhead costs.

The rate you see advertised is the annual percentage yield, or APY. This is the actual return you'll earn in a year, including the effect of compounding — the way interest gets added to your balance and then earns interest itself. A CD advertising 4.50% APY will pay you exactly that amount if you hold it for a full year, regardless of how often the bank compounds the interest.

Rates change constantly. If you're comparing CDs, check the rate on the day you plan to open one, because what you saw yesterday may no longer be available. Banks are not required to hold a rate for you while you think about it.

What happens if you need your money before the CD matures

Most CDs charge an early withdrawal penalty if you take your money out before the maturity date. The penalty is usually expressed as a number of months of interest — for example, "three months of interest" or "six months of interest." If you have a $10,000 CD earning 4.50% APY and the penalty is three months of interest, withdrawing early would cost you roughly $112.50.

The penalty comes out of your interest earnings first. If you haven't earned enough interest yet to cover the penalty, the bank takes the difference from your principal. This means you could get back less money than you deposited. Some banks offer "no-penalty CDs" that let you withdraw without a penalty, but these pay lower interest rates to offset the bank's risk.

Before you open a CD, read the disclosure document the bank provides — it will state the exact penalty amount or formula. Do not rely on what a teller tells you verbally; the written terms are what the bank will enforce.

FDIC insurance and what it protects

The Federal Deposit Insurance Corporation (FDIC) insures CDs at member banks up to $250,000 per depositor per bank. This means if the bank fails, you get your money back up to that limit, even if the bank's assets are gone. The insurance covers both your principal and any interest you've earned up to the maturity date.

The $250,000 limit applies per bank, not per CD. If you have two CDs at the same bank totaling $300,000, only $250,000 is insured. If you want to insure more than $250,000, you can open CDs at different banks — each bank's coverage is separate. Some people also use different ownership categories (like individual accounts versus joint accounts) to increase their coverage, but this gets complicated; the FDIC website has a calculator if you need to verify your coverage.

Credit unions offer similar insurance through the National Credit Union Administration (NCUA), also up to $250,000 per member per institution. The protection works the same way.

What happens when your CD reaches maturity

On the maturity date, your CD stops earning interest. You then have a window of time — usually five to ten business days, depending on the bank — to decide what to do with the money. The bank will notify you before maturity, typically by mail or email, and tell you your options.

You can withdraw the full amount (principal plus interest) in cash or transfer it to another account. You can open a new CD at the same bank, either for the same term or a different one. Or you can do nothing, and the bank will automatically roll the CD over into a new term at its current rate. Many people miss this window and accidentally roll over into a new CD at a lower rate than they could get elsewhere, so set a calendar reminder for a week before your maturity date.

If you want to move your CD to a different bank before maturity, you'll pay the early withdrawal penalty. If you want to move it after maturity, there's no penalty — you straightforward withdraw and deposit elsewhere.

How CD laddering spreads out your maturity dates

CD laddering is a strategy where you open multiple CDs with different maturity dates so that money becomes available at regular intervals. For example, you might open five $2,000 CDs with one-year, two-year, three-year, four-year, and five-year terms. After one year, the first CD matures and you can reinvest it. After two years, the second one matures, and so on.

This approach gives you access to some of your money regularly without paying early withdrawal penalties, while still locking most of it away at higher rates. It also lets you take advantage of rising interest rates — when a CD matures and rates have gone up, you can open a new one at the higher rate instead of being stuck with an old rate for five more years.

Laddering requires more attention than opening a single CD, because you have to track multiple maturity dates and decide what to do with each one as it comes due. But it's a straightforward way to balance safety, predictability, and flexibility.

Comparing CDs across banks and terms

CD rates vary widely between banks. A five-year CD at one bank might pay 4.25% while another pays 3.50% — that's a significant difference over five years. Online banks almost always pay more than traditional banks because they have lower costs. Credit unions sometimes pay competitive rates, especially if you're a member.

When you compare, make sure you're looking at the same term length and that you understand the penalty structure. A CD with a lower rate but a smaller penalty might be better than one with a higher rate and a steep penalty, depending on your situation. Also check whether the bank requires a minimum deposit — some banks have minimums of $500 or $1,000, while others have none.

Use a CD rate comparison tool or check several banks' websites directly. Rates change daily, so a comparison from last week is not current. Once you've found a rate you want, open the CD that same day if possible, because rates can move quickly.

Frequently Asked Questions

Can I add money to a CD after I open it?

No. CDs are fixed-amount products. Once you open one, you cannot deposit additional money into that CD. If you want to invest more, you have to open a separate CD. Some banks let you open multiple CDs at the same time with different maturity dates.

What's the difference between a CD and a savings account?

A savings account has no maturity date and you can withdraw money anytime without penalty, but it pays much lower interest — often under 0.50% APY. A CD locks your money for a set period and pays significantly more interest, but you pay a penalty if you withdraw early. Choose a CD if you won't need the money for several months or longer.

Do I have to pay taxes on CD interest?

Yes. CD interest is taxable income in the year it's earned or credited to your account, depending on how the bank handles it. 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 the bank goes out of business?

The FDIC takes over and pays you your full balance up to $250,000, including any interest earned through the maturity date. This process usually takes a few weeks. Your money is protected even if the bank fails completely.

Can I move a CD to a different bank without paying a penalty?

Only after it matures. If you withdraw before the maturity date, you pay the early withdrawal penalty. Once it matures, you can withdraw the full amount and deposit it at another bank with no penalty. This is why many people wait for maturity to shop around for better rates.