What a CD rate is and why it matters

A CD rate is the percentage of interest a bank or credit union will pay you on the money you deposit in a certificate of deposit. When you put $1,000 into a CD with a 4.5% rate for one year, the bank promises to pay you $45 in interest at the end of that year — assuming you leave the money untouched for the full term.

The rate matters because it determines how much your money grows while it sits in the CD. A higher rate means more interest paid to you. The rate is also fixed, meaning it does not change during the term of the CD, even if the bank's rates drop or rise. You know exactly what you will earn before you hand over your money.

CD rates are higher than savings account rates at the same bank because you are agreeing to lock your money away for a set period — typically three months to five years. The bank can count on having your money available to lend out, so they reward you for that commitment.

Key Takeaways

  • A CD rate is the interest percentage the bank pays you, and it stays the same for the entire term of the CD.
  • Rates vary by bank, by CD term length, and by how much money you deposit, so comparing rates across institutions is worth your time.
  • A longer CD term usually comes with a higher rate, but your money is locked away longer and you pay a penalty if you withdraw early.
  • The current interest rate environment — set largely by Federal Reserve decisions — affects what rates banks offer, so rates change over time.
  • The rate you see advertised is the annual percentage yield, or APY, which already includes how often the bank compounds your interest.

How banks set CD rates

Banks do not set CD rates in isolation. The Federal Reserve, which is the central banking system of the United States, influences the interest rates that banks charge each other for short-term loans. When the Federal Reserve raises its rates, banks typically raise the rates they offer on CDs. When the Federal Reserve lowers its rates, CD rates usually fall.

Within that broader environment, individual banks compete for your deposit. A bank that wants to attract more CD deposits might offer a higher rate than its competitors. A bank with plenty of deposits might lower its rate because it does not need to attract as much new money. This is why the same CD term at Bank A might pay 4.2% while Bank B pays 4.8%.

The amount of money you deposit can also affect the rate. Some banks offer higher rates for larger deposits — for example, 4.5% on a $10,000 CD but only 4.2% on a $1,000 CD. Other banks offer the same rate regardless of deposit size. You have to check each bank's terms.

Why CD rates change based on term length

A three-month CD almost always pays less interest than a five-year CD at the same bank. This is because the bank is taking on more risk by locking in a rate for five years. If interest rates rise sharply over those five years, the bank is stuck paying you the lower rate it promised.

When you choose a longer term, you are also giving up the ability to move your money if you find a better rate elsewhere. Banks compensate you for that sacrifice by paying more. The difference between short-term and long-term rates is called the yield curve, and it shifts depending on what banks and investors expect to happen with interest rates in the future.

There are rare periods when short-term rates are higher than long-term rates — this is called an inverted yield curve — but most of the time, longer terms pay more.

The difference between rate and APY

When a bank advertises a CD rate, it usually shows you the annual percentage yield, or APY. This is slightly different from the straightforward interest rate because it accounts for compounding — the process of earning interest on your interest.

Here is a straightforward example: if a CD has a 4% annual interest rate and compounds monthly, the bank calculates one-twelfth of 4% each month and adds it to your balance. The next month, you earn interest on the original amount plus the interest from the previous month. Over a full year, this compounds to an APY of about 4.08% — slightly higher than the stated 4% rate.

Most banks show you the APY because it is the more accurate number for comparing CDs. When you see a rate advertised, assume it is the APY unless the bank specifically labels it otherwise.

How to find and compare CD rates

CD rates vary significantly between banks, so spending 15 minutes comparing rates can save you real money. Start by checking the rates at banks where you already have an account, then look at online banks and credit unions, which often pay higher rates because they have lower overhead costs.

When you compare, make sure you are looking at the same term length at each institution. A five-year CD at Bank A is not comparable to a three-year CD at Bank B. Write down the rate, the term, the minimum deposit required, and any special conditions — for example, whether the bank allows you to add money to the CD after you open it.

Websites that track CD rates across multiple banks can speed up this process, though you will still want to verify the current rate directly with the bank before you deposit money. Rates change frequently, and a website might not update when ready.

What happens to your rate if you withdraw early

The fixed rate you agreed to is only may provide if you leave your money in the CD until the maturity date — the day the term ends. If you withdraw money before that date, the bank charges you an early withdrawal penalty. This penalty is usually a certain number of months of interest.

For example, a CD might have a penalty of three months of interest. If you withdraw after six months from a CD paying 4% APY on $10,000, you would lose about $100 in interest (three months' worth). You would get your $10,000 back, but the bank keeps the $100 penalty.

Some banks offer no-penalty CDs that let you withdraw without a penalty, but these pay lower rates to compensate for the flexibility. The trade-off is always there: more flexibility means lower interest.

How CD rates compare to other savings options

CD rates are higher than regular savings accounts at the same bank because your money is locked away. A savings account might pay 0.01% while a one-year CD at that same bank pays 4.5%. Over a year, that difference adds up significantly on larger deposits.

Money market accounts sometimes offer rates close to CDs, but they usually allow you to withdraw money without penalty, so the rates are typically lower. High-yield savings accounts at online banks can pay rates competitive with short-term CDs, but again, you can withdraw whenever you want.

The choice between a CD and another savings option depends on whether you need access to the money. If you know you will not need the money for a year or more, a CD locks in a higher rate. If you might need it sooner, a savings account gives you flexibility at the cost of lower interest.

Frequently Asked Questions

Do CD rates change after I open the CD?

No. Once you open a CD, your rate is locked in for the entire term. If the bank's rates rise or fall, your rate stays the same. This is one of the main advantages of a CD — you know exactly what you will earn.

What is the best CD rate right now?

CD rates change daily and vary by bank, term length, and deposit amount. The "best" rate depends on which term you need and which banks you have access to. Check current rates at several banks and credit unions to see what is available in your area and online.

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

Some banks allow you to add money to a CD after opening it, and some do not. This varies by institution and sometimes by CD type. Ask the bank before you open the CD if you think you might want to add money later.

Why do online banks offer higher CD rates than traditional banks?

Online banks have lower costs because they do not operate physical branches. They pass some of those savings to customers in the form of higher interest rates on CDs and savings accounts. You get the same FDIC protection whether you bank online or in person.

What happens to my CD when it matures?

When your CD reaches its maturity date, the bank pays you the original deposit plus all the interest earned. You then have a short window — usually 7 to 10 days — to decide what to do with the money. You can open a new CD, move it to a savings account, or withdraw it. If you do nothing, many banks automatically renew the CD at the current rate.