A certificate of deposit is a savings account that locks your money away for a set time in exchange for a higher interest rate

A certificate of deposit, or CD, is an account you open at a bank or credit union where you agree to leave a sum of money untouched for a fixed period — typically three months to five years. In return, the bank pays you a higher interest rate than you would earn in a regular savings account. When the term ends, you get your original money back plus the interest earned.

The trade-off is straightforward: you give up access to your cash for a defined stretch of time, and the bank rewards you for that commitment. If you withdraw the money before the term is up, you pay a penalty — usually a portion of the interest you would have earned, though the exact amount varies by institution.

CDs work best for money you know you will not need in the near term. They are not investment accounts; they are savings tools backed by federal insurance up to $250,000 per depositor per bank.

Key Takeaways

  • You deposit a lump sum and agree not to touch it for a set period, ranging from a few months to several 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 market rates rise or fall during your term.
  • Withdrawing money before the maturity date triggers an early withdrawal penalty, typically equal to a few months of interest.
  • CDs are insured by the Federal Deposit Insurance Corporation (FDIC) at banks or the National Credit Union Administration (NCUA) at credit unions, up to $250,000 per account.
  • You can open a CD with as little as $500 at many institutions, though some require $1,000 or more as a minimum deposit.

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 and which term length you want. The bank then tells you the interest rate for that specific term. Longer terms almost always come with higher rates. A three-month CD might pay 4.5 percent, while a five-year CD at the same bank might pay 5.2 percent. The bank uses your money during that time, so it pays more for the privilege of holding it longer.

The interest rate is fixed. It does not move if the Federal Reserve raises or lowers rates during your term. If you lock in 5 percent for two years and rates climb to 6 percent six months later, you still earn 5 percent. That certainty is part of the appeal — you know exactly what you will have at the end.

Interest compounds on most CDs, meaning you earn interest on your interest. A $10,000 CD at 5 percent annual interest compounded daily will grow faster than one compounded monthly, though the difference is small. Always ask how often interest compounds when you compare CDs.

What happens when your CD reaches maturity

When your term ends, the CD reaches maturity. At that point, the bank deposits your original amount plus all earned interest into your account — usually a linked checking or savings account you specify when you open the CD. You can then withdraw the money or use it however you wish.

Most banks offer a grace period after maturity, typically seven to ten days, during which you can withdraw your money without penalty. If you do nothing during that window, many banks automatically renew the CD for another term at the current rate. That new rate may be higher or lower than what you earned before. If you do not want to renew, you must contact the bank and request the funds be transferred out.

Some people use the maturity date as a forcing function: they open a CD knowing they will have a lump sum available at a specific time, which helps them plan for a large expense or another financial goal.

Early withdrawal penalties and when they explore

If you need your money before the maturity date, you can withdraw it, but the bank will charge a penalty. The penalty is 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 percent annually, that penalty would be roughly $125.

Some banks charge a flat dollar amount instead, and a few charge a percentage of your principal. Always read the disclosure document when you open a CD — it will state the exact penalty. The penalty comes out of your interest first; if you withdraw very early and the penalty exceeds what you have earned, it comes out of your principal.

A few banks offer no-penalty CDs, which let you withdraw your full balance without any fee before maturity. These almost always pay a lower interest rate than standard CDs, so you are trading rate for flexibility. They make sense if you think you might need the money but want to lock in a rate higher than a savings account offers.

Where to open a CD and what to compare

You can open a CD at any bank or credit union. Online banks typically offer higher rates than brick-and-mortar branches because they have lower overhead costs. A national bank might pay 4.0 percent on a one-year CD, while an online bank pays 5.0 percent for the same term. Over a year, that difference adds up.

Before you open a CD, compare the rate, the term options available, the minimum deposit required, and the early withdrawal penalty. A rate that looks good today might not be the best available next week — CD rates move with the broader economy. Some sites track CD rates across institutions and let you sort by term and rate.

Confirm that the bank or credit union is insured. Look for the FDIC logo on a bank's website or call the FDIC's toll-free number to verify. Credit unions display the NCUA logo. This insurance protects your deposit up to $250,000 if the institution fails.

CDs versus savings accounts and money market accounts

A regular savings account offers flexibility — you can withdraw money whenever you want — but pays a much lower interest rate, often under 1 percent. A CD locks you in but pays significantly more, sometimes two to three times as much. The choice depends on whether you need access to the money.

A money market account sits between the two. It typically pays more than a savings account but less than a CD, and it usually lets you make a limited number of withdrawals per month without penalty. If you want some flexibility and a better rate than savings, a money market account may suit you better than a CD.

For money you are certain you will not touch for several years, a CD almost always wins on rate. For money you might need within the next few months, a savings account or money market account is safer because you avoid the early withdrawal penalty.

How CDs fit into a savings strategy

Many people use CDs as part of a larger plan. You might keep three to six months of expenses in a regular savings account for emergencies, put money you will need in one to two years in a short-term CD, and put longer-term savings in a longer-term CD. This approach, called laddering, gives you access to some of your money each year while locking in higher rates on the rest.

CDs work well for specific goals with known timelines: saving for a down payment in two years, setting aside money for a car purchase in eighteen months, or building a fund for a child's education. Because the rate is fixed and may provide, you know exactly how much you will have when you need it.

CDs are not meant to beat inflation or grow wealth over decades. They are a safe, predictable place to park money you do not need right now but will need at a known point in the future.

Frequently Asked Questions

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

No. A CD is a fixed deposit. You choose an amount when you open it, and that amount stays the same for the entire term. If you want to save more, you open a separate CD or use a savings account. Some banks let you open multiple CDs at once with different maturity dates.

What happens if the bank fails while my money is in a CD?

Your deposit is protected up to $250,000 by the FDIC (at banks) or NCUA (at credit unions). If the institution fails, the insurance agency pays you the full amount of your CD plus any earned interest, up to the limit. You do not lose money because of a bank failure.

Is the interest I earn on a CD taxable?

Yes. The interest you earn on a CD is taxable income in the year you earn it, even if you do not withdraw the money. The bank will send you a 1099-INT form at tax time showing how much interest you earned. If you are in a high tax bracket, the after-tax return on a CD may be lower than it appears.

Can I move a CD to a different bank?

You can withdraw your CD when it matures and open a new one at a different bank. You cannot transfer a CD directly to another institution before maturity without triggering the early withdrawal penalty. Some banks offer CD brokerage services that let you sell your CD on a secondary market, but this is uncommon and may result in a loss if rates have risen.

What is the best CD term length to choose?

That depends on when you will need the money. If you know you will need it in two years, choose a two-year CD. If you are unsure, a shorter term (six months to one year) lets you reassess sooner, though you will earn a lower rate. Longer terms pay more but lock you in; choose based on your timeline, not just the rate.