A CD is a savings account where you agree to leave your money untouched for a set period in exchange for a higher interest rate

CD stands for certificate of deposit. You give a bank or credit union a lump sum of money, they hold it for a fixed time period (called the term), and in return they pay you interest at a rate higher than you'd get in a regular savings account. The catch: if you withdraw the money before the term ends, you pay a penalty.

The bank uses your money during that time — lending it out, investing it — so they're willing to pay you more interest than they would if you could pull it out whenever you wanted. You're essentially trading access to your cash for a better rate.

Key Takeaways

  • A CD locks your money away for a specific time period, typically ranging from three months to five years, in exchange for a may provide interest rate.
  • The interest rate on a CD is fixed when you open it and does not change, even if the bank's rates go up or down.
  • Withdrawing money before the term ends costs you a penalty, usually a few months' worth of interest, so CDs work best for money you won't need soon.
  • When your CD term ends, you can withdraw the money and interest, open a new CD, or let it automatically renew at whatever the current rate is.

How the term and interest rate work together

When you open a CD, you choose how long to lock your money away. Common terms are 3 months, 6 months, 1 year, 2 years, 3 years, and 5 years. The longer the term, the higher the interest rate the bank will offer you — because they get to use your money for longer.

The interest rate you receive is fixed, meaning it stays the same for the entire term. If you open a one-year CD at 4.5% interest, you'll earn 4.5% no matter what happens to the bank's rates over that year. This is different from a savings account, where the rate can change monthly.

Interest on a CD is usually compounded daily or monthly, meaning you earn interest on your interest. The bank will tell you the APY (annual percentage yield) when you open the account — that's the total interest you'll earn in a year, accounting for compounding.

What happens when you need the money early

If you withdraw money from a CD before the term ends, you'll pay an early withdrawal penalty. The size of the penalty varies by bank and by term length. A typical penalty might be three months of interest, six months of interest, or a flat dollar amount — the bank discloses this before you open the CD.

The penalty comes out of your interest earnings first. If your penalty is larger than the interest you've earned so far, it eats into your original deposit. This is why CDs are best for money you genuinely won't need until the term is up.

Some banks offer no-penalty CDs, which let you withdraw early without a penalty (though usually at a lower interest rate). These exist, but they're less common and the rate is typically lower than a standard CD.

What happens when your CD matures

When your term ends, your CD matures. At that point, you have choices. You can withdraw the full amount (your original deposit plus all the interest you've earned). You can open a new CD with the same bank or a different one. Or you can do nothing.

If you do nothing, most banks will automatically renew your CD into a new term at whatever the current interest rate is. This happens during a grace period, usually 7 to 10 days after maturity. If rates have dropped, your new rate will be lower. If rates have risen, you might want to shop around before the renewal happens.

Check your CD paperwork or call the bank a week or two before maturity to find out the renewal rate. If it's not competitive, you can withdraw the money penalty-free during the grace period and move it elsewhere.

CDs versus savings accounts and money market accounts

A regular savings account has no term — you can withdraw whenever you want. But the interest rate is lower and can change at any time. A CD locks in a higher rate but locks up your money.

A money market account sits in the middle. It usually pays more interest than a savings account but less than a CD, and you can withdraw money (though there are limits on how often). Money market accounts are useful if you want some growth but also need occasional access.

Choose a CD if you have money you won't need for several months or years and want the highest rate. Choose a savings account if you need to access your money regularly. Choose a money market account if you want something between the two.

How to open a CD

You can open a CD at any bank or credit union that offers them. You'll need to decide on the term length and deposit an opening amount — this varies by institution but is often $500 to $2,500. Some banks have lower minimums; some have higher ones.

You can open a CD in person at a branch, online through the bank's website, or by phone. Online banks often have higher interest rates than brick-and-mortar banks because they have lower overhead costs. The process takes a few minutes and you'll receive confirmation of the term, rate, and maturity date.

The money you deposit is FDIC insured (at banks) or NCUA insured (at credit unions) up to $250,000 per account holder per institution. This means if the bank fails, the government guarantees your deposit.

When a CD makes sense for your situation

A CD is a good choice if you have a specific amount of money you won't need for a known period of time. For example: you're saving for a down payment on a house in two years, or you received a bonus and want to earn more interest than a savings account would give you.

CDs are also useful if you're worried about spending money. Because there's a penalty for early withdrawal, a CD creates a psychological barrier that can help you leave the money alone.

A CD is not a good choice if you might need the money within the next few months, or if you're saving for something with an uncertain timeline. The penalty will eat into your gains, and you might end up with less than you started with.

Frequently Asked Questions

Can I open more than one CD at the same bank?

Yes. You can open multiple CDs with different term lengths, different amounts, or both. Each CD is insured separately up to $250,000, so if you have $300,000, you could open two CDs at the same bank and both would be fully protected.

What if interest rates go up after I open my CD?

Your rate stays the same — that's the point of a fixed rate. If rates rise significantly, you'll be earning less than new CDs at the same bank. You can't change your rate mid-term without paying the early withdrawal penalty. When your CD matures, you can open a new one at the higher rate.

Is the interest I earn on a CD taxable?

Yes. The interest you earn is taxable income in the year you earn it, even if you don't withdraw the money. The bank will send you a 1099-INT form at tax time showing how much interest you earned. This is true whether the CD is in a regular account or a retirement account like an IRA.

What's the difference between a CD and a bond?

Both lock up your money for a set time and pay interest, but they work differently. A CD is issued by a bank and is insured. A bond is issued by a company or government and is not insured — if the issuer fails, you could lose money. Bonds can also be sold before maturity, while CDs typically cannot.

Can I use a CD for retirement savings?

Yes. You can open a CD inside an IRA (individual retirement account) or other retirement account. The CD itself works the same way, but the tax treatment and withdrawal rules of the retirement account apply. Withdrawing from a retirement CD before age 59½ usually triggers both the CD penalty and a retirement account penalty.