A CD is a savings account where you agree to lock up your money for a set time in exchange for a higher interest rate

A certificate of deposit (CD) is a contract between you and a bank or credit union. You give them a lump sum of money—say $1,000 or $5,000—and they agree to pay you back that amount plus interest after a fixed period, usually three months to five years. The catch: you cannot touch the money during that period without paying a penalty.

Banks offer higher interest rates on CDs than on regular savings accounts because they know they can count on having your money for the full term. Right now, CD rates vary widely depending on the bank, the term length, and how much you deposit. A three-month CD at one bank might pay 4.5%, while a five-year CD at another might pay 5.2%. You have to shop around—rates change constantly and differ from institution to institution.

The money in a CD is insured by the FDIC (Federal Deposit Insurance Corporation) up to $250,000 per account holder per bank, the same as a regular savings account. That means if the bank fails, you get your money back.

Key Takeaways

  • You deposit a fixed amount of money and agree not to withdraw it until the CD matures, usually between three months and five years.
  • Banks pay higher interest rates on CDs than savings accounts because your money is locked in for a may provide period.
  • If you withdraw money before the maturity date, you will pay an early withdrawal penalty that can eat into your interest earnings or principal.
  • CD rates vary by bank and term length, so comparing offers from multiple banks can significantly increase what you earn.
  • Your CD is FDIC-insured up to $250,000, so your principal is protected even if the bank fails.

How the interest rate and term length work together

When you open a CD, you choose two things: how long to lock up your money (the term) and which bank to use. The bank then locks in an interest rate for that entire period. If you buy a one-year CD at 4.8%, you will earn 4.8% on your money for exactly one year, no matter what happens to interest rates in the market.

Longer terms usually come with higher rates. A three-month CD might pay 4.0%, a one-year CD might pay 4.8%, and a five-year CD might pay 5.2%. The bank is willing to pay more because they want to keep your money longer. However, this also means you are taking on more risk: if interest rates rise sharply, you will be stuck earning the lower rate you locked in.

When the CD matures (reaches its end date), the bank deposits your principal plus all the interest into your account. At that point, you can withdraw the money, move it to another CD, or let it roll over into a new CD at whatever the current rate is.

What happens if you need the money before maturity

This is where CDs become a real commitment. If you withdraw money before the maturity date, you will pay an early withdrawal penalty. The size of the penalty varies by bank and CD term. Some banks charge three months of interest; others charge six months or a percentage of your principal. A few banks charge nothing, but those are rare and usually offer lower rates to compensate.

The penalty comes out of your earnings first. If you earned $100 in interest and the penalty is $75, you lose the interest and keep your principal. If the penalty is larger than your interest, it comes out of your principal—meaning you get back less money than you put in. This is why CDs are best for money you know you will not need.

Before you open a CD, read the disclosure document or ask the bank directly: what is the early withdrawal penalty, and is it a flat amount or a percentage? Some banks let you withdraw a small amount without penalty; others do not. Knowing this upfront prevents a painful surprise.

CD laddering: a way to balance higher rates with access to your money

One strategy people use to get higher CD rates without locking all their money away for years is called CD laddering. Instead of putting $5,000 into one five-year CD, you split it into five $1,000 CDs with different maturity dates: one that matures in one year, one in two years, one in three years, and so on.

Every year, one CD matures and you can withdraw the money, reinvest it, or use it. Meanwhile, the longer-term CDs are earning the higher rates that come with longer terms. If interest rates rise, you get to reinvest the maturing CD at the new higher rate. If rates fall, you still have the longer CDs locked in at the better rate.

Laddering works best when you have a larger sum to split and when you do not need all the money at once. It requires more attention than a single CD, but it gives you more flexibility without sacrificing much of the rate advantage.

Where to find CD rates and what to compare

CD rates are not standardized—every bank sets its own. A large national bank might offer 4.2% on a one-year CD, while an online bank might offer 5.0% for the same term. That difference adds up fast. On a $10,000 CD, the difference between 4.2% and 5.0% is $80 in extra earnings over one year.

To find the best rates, check websites that aggregate CD offers from multiple banks, or visit bank websites directly. When you compare, make sure you are looking at the same term length and the same deposit amount, because rates vary on both. Also check the early withdrawal penalty—a slightly lower rate with no penalty might be better than a higher rate with a steep one.

Online banks and credit unions often offer higher rates than brick-and-mortar banks because they have lower overhead costs. However, make sure any bank you use is FDIC-insured (or NCUA-insured if it is a credit union). That insurance is what protects your money if the institution fails.

CDs versus savings accounts and money market accounts

A regular savings account is more flexible than a CD but pays less interest. You can withdraw money whenever you want without penalty, but the rate is usually 0.5% to 2.0%—much lower than a CD. A money market account sits in the middle: it pays more than a savings account (usually 3.0% to 5.0%) but often requires a larger minimum deposit and may limit how many times you can withdraw per month.

Choose a CD if you have money you will not need for several months or years and want the highest rate. Choose a savings account if you need quick access and do not mind earning less. A money market account works if you want a higher rate than savings but more flexibility than a CD, and if you have the minimum deposit the bank requires.

Many people use a combination: a small emergency fund in a savings account, some money in a money market account for medium-term goals, and CDs for money earmarked for something specific a year or more away.

Frequently Asked Questions

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

No. A CD is a fixed contract for a fixed amount. Once you open it, you cannot deposit additional funds into that same CD. If you want to invest more money, you would need to open a separate CD. Some banks allow you to open multiple CDs at once, each with its own term and amount.

What is the difference between a CD and a bond?

Both lock up your money for a set period and pay interest, but they work differently. A CD is issued by a bank and insured by the FDIC. A bond is issued by a government or company and is not insured. Bonds can fluctuate in value before maturity; CDs do not. Bonds are generally riskier but can offer higher returns.

Do I have to pay taxes on CD interest?

Yes. The interest you earn on a CD is taxable income. The bank will send you a 1099-INT form at the end of the year showing how much interest you earned. You report this on your tax return. This is one reason CDs in retirement accounts like IRAs can be useful—the interest grows tax-deferred.

What happens if I do not withdraw my money when the CD matures?

Most banks automatically roll your CD into a new one at the current rate for the same term length. However, you usually have a grace period (often 7 to 10 days) to withdraw the money or move it elsewhere without penalty. Check your bank's policy so you are not surprised by an automatic rollover at a lower rate.

Is a CD a good place for an emergency fund?

Not for the full emergency fund. Emergency money needs to be accessible immediately without penalty. A regular savings account is better for that. However, if you have money beyond your emergency fund that you will not need for several months, a CD is a solid place to earn more interest on it.