A CD locks your money for a set time in exchange for a fixed interest rate

A certificate of deposit is a savings product where you give a bank or credit union a lump sum of money, agree not to touch it for a specific period (called the term), and receive a may provide interest rate in return. The bank pays you that rate regardless of what happens to market rates while your money sits there. When the term ends, you get your original deposit plus the interest earned.

The trade-off is simple: you surrender access to your money for a defined stretch of time, and the bank rewards that commitment with a higher interest rate than you would get in a regular savings account. If you withdraw the money before the term ends, you pay a early withdrawal penalty — usually a certain number of months' worth of interest, though the exact amount varies by bank and CD term.

CDs come in many term lengths. Common options are 3 months, 6 months, 1 year, 2 years, 3 years, and 5 years, though some banks offer terms as short as 1 month or as long as 10 years. The longer the term, the higher the interest rate typically is, because the bank has use of your money for a longer period and you are giving up more flexibility.

Key Takeaways

  • You deposit a fixed amount, choose a term length, and receive a may provide interest rate that does not change for the entire term.
  • Your money is locked in — withdrawing early triggers a penalty, usually equal to several months of interest.
  • Longer terms generally pay higher rates because you are committing your money for a greater length of time.
  • When the term ends, your CD matures and you can withdraw the money, renew it at the current rate, or move it elsewhere.
  • CDs are insured by the FDIC (at banks) or NCUA (at credit unions) up to $250,000 per depositor per institution.

How the interest rate is set and what you actually earn

The interest rate on a CD is set by the bank when you open it and locked in for the entire term. You do not have to worry about rates dropping mid-term — your rate stays the same. The bank sets rates based on what the Federal Reserve is doing, what other banks are offering, and how much money the bank needs to attract.

Interest on a CD is usually compounded daily or monthly, meaning the bank calculates interest on your principal plus any interest already earned. The more frequently interest compounds, the slightly more you earn. At the end of the term, the bank adds all the accumulated interest to your account.

For example, a $10,000 CD with a 4.5% annual rate compounded daily for one year will earn roughly $460 in interest (the exact amount depends on the compounding frequency). You would receive $10,460 when the CD matures. The actual dollar amount you earn depends on three things: the principal you deposit, the interest rate, and the term length.

What happens when your CD reaches maturity

When your term ends, your CD matures. At that point, you have several options. You can withdraw the full amount (principal plus interest) and move it to a savings account, another CD, or somewhere else entirely. You can also let the bank automatically renew the CD into a new one with the same term length — this is called auto-renewal, and most banks do this by default.

If your CD auto-renews, the new rate will be whatever the bank is currently offering for that term length, not the rate you had before. If rates have dropped, your new rate will be lower. If rates have risen, your new rate will be higher. Banks typically give you a grace period (usually 7 to 10 days) after maturity to withdraw your money without penalty if you do not want to renew at the new rate.

It is worth setting a calendar reminder for your maturity date so you are not caught off guard. If you miss the grace period and the CD auto-renews at a rate you do not like, you can still withdraw the money, but you will pay the early withdrawal penalty on the new CD.

Early withdrawal penalties and when they apply

If you need your money before the term ends, you can withdraw it, but the bank will charge you a penalty. The penalty is typically expressed as a number of months of interest — for instance, "90 days of interest" or "6 months of interest." The exact penalty depends on the bank and the CD term.

The penalty is deducted from your interest earnings first. If the penalty is larger than the interest you have earned so far, the bank will take the difference from your principal. For example, if you have a 1-year CD with a 180-day (6-month) early withdrawal penalty, and you withdraw after 3 months, you will lose 6 months of interest even though you only earned 3 months' worth. If the penalty exceeds what you have earned, you will get back less than your original deposit.

Some banks offer no-penalty CDs that let you withdraw your money early without a penalty, though these typically pay lower interest rates than standard CDs. A no-penalty CD makes sense if you are not certain you can leave the money untouched for the full term.

How CDs compare to savings accounts and money market accounts

A regular savings account has no term and no penalty — you can withdraw money whenever you want. In exchange, savings accounts pay much lower interest rates, often under 0.5% annually. A CD pays more because you are committing to leave the money alone.

A money market account sits between a savings account and a CD. It typically pays more interest than a savings account but less than a CD, and it gives you limited check-writing or debit card access while still requiring you to maintain a minimum balance. Money market accounts have no set term, so you keep more flexibility than a CD, but you sacrifice some of the higher rate.

The choice depends on when you might need the money. If you know you will not touch it for a year or more, a CD locks in a higher rate. If you might need it sooner, a savings account or money market account keeps your options open, even if the rate is lower.

FDIC and NCUA insurance protection on CDs

CDs held at banks are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000 per depositor per bank. CDs held at credit unions are insured by the National Credit Union Administration (NCUA) up to the same $250,000 limit per depositor per credit union. This means if the bank or credit union fails, you get your money back up to that limit.

The $250,000 limit applies per institution, not per CD. If you have multiple CDs at the same bank, the total coverage across all of them is $250,000. If you want to insure more than $250,000, you can open CDs at different banks — each bank's CDs are insured separately up to $250,000.

This insurance does not cover investment losses or market risk — it only protects you if the institution itself fails. Since CDs have a fixed rate set by the bank, there is no market risk to protect against anyway. Your rate and principal are may provide by the bank's promise, backed by FDIC or NCUA insurance if the bank cannot pay.

How to choose a CD term and rate

The term you choose should match how long you can afford to lock up your money. If you have an emergency fund, a CD is not the right place for it because you need access without penalty. If you have money you know you will not need for 2 years, a 2-year CD makes sense. If you are unsure, a shorter term (3 or 6 months) lets you reassess sooner.

Rates vary by bank and by term. A 1-year CD at one bank might pay 4.2% while another pays 3.8%. Shopping around matters — the difference between banks on the same term can be 0.5% or more, which adds up over time. Online banks typically offer higher rates than brick-and-mortar banks because they have lower overhead costs.

You can compare CD rates across banks using rate-tracking websites, but you will need to visit each bank's website or call to open the CD. There is no single application process — each bank handles its own CDs.

Frequently Asked Questions

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

No. A CD is a fixed deposit — you choose the amount when you open it, and that amount stays the same for the entire term. If you want to deposit more money, you would need to open a separate CD or put the additional money in a savings account.

What happens if I need my money before the CD matures?

You can withdraw it, but you will pay an early withdrawal penalty. The penalty is usually several months of interest. If the penalty exceeds the interest you have earned, the bank takes the difference from your principal, so you get back less than you deposited.

Do I pay taxes on CD interest?

Yes. CD interest is taxable income in the year it is earned. 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.

Is a CD a good place for an emergency fund?

No. Emergency funds need to be accessible without penalty. A regular savings account or money market account is better because you can withdraw money anytime. A CD is better for money you know you will not need for several months or longer.

What is the difference between a CD and a bond?

A CD is issued by a bank and insured by the FDIC up to $250,000. A bond is issued by a government or company and has no deposit insurance. Bonds can fluctuate in value if you sell before maturity, while CDs have a fixed value. CDs are simpler and lower-risk for most savers.