What a CD pays you depends on the rate the bank offers and how long you lock your money away

A CD (certificate of deposit) pays you interest on the money you deposit. The amount you earn is determined by three things: the interest rate the bank advertises, how much you deposit, and how long you agree to leave the money untouched. A bank might offer 4.5% annual interest on a one-year CD, or 5.2% on a five-year CD. The longer the term, the higher the rate is usually—but not always.

The actual dollar amount you earn is calculated by multiplying your deposit by the rate and dividing by the number of years. If you put $10,000 in a CD paying 5% for one year, you earn $500. If you put the same $10,000 in a CD paying 4% for one year, you earn $400. The difference matters, especially when you're comparing banks.

Banks set their own rates, so the same CD term pays different amounts at different institutions. One bank might offer 4.75% on a one-year CD while another offers 5.25%. Shopping around before you deposit is the only way to find the best payout for your money.

Key Takeaways

  • CD interest rates vary by bank and by term length, so a one-year CD at one bank may pay significantly more or less than the same term at another bank.
  • The interest you earn is calculated by multiplying your deposit amount by the annual rate, so a larger deposit or higher rate means more money in your account at maturity.
  • Longer CD terms typically offer higher rates than shorter ones, but this relationship is not may provide and changes based on economic conditions.
  • You can compare current rates across banks before you deposit, and the rate you lock in at the time of deposit is the rate you keep for the entire term.

How the interest calculation actually works

Banks use a formula called simple interest for most CDs. You multiply your principal (the amount you deposit) by the annual interest rate, then multiply by the number of years. The result is the total interest you earn.

Here is a concrete example. You deposit $5,000 in a CD paying 4.5% annual interest for two years. The calculation is: $5,000 × 0.045 × 2 = $450. At the end of two years, you receive your original $5,000 plus $450 in interest, for a total of $5,450.

Some banks use compound interest instead, which means they add interest to your account at regular intervals (monthly, quarterly, or daily) and then pay interest on that interest. Compounding produces slightly more money than simple interest, but most banks disclose which method they use in the CD terms. The difference is usually small on CDs under five years.

Why different banks pay different rates

Banks set CD rates based on what the Federal Reserve does with short-term interest rates. When the Fed raises its rates, banks generally raise CD rates. When the Fed lowers rates, CD rates fall. But banks do not all move at the same time or by the same amount.

Large national banks often pay lower rates than smaller banks or online banks because they have more customers and do not need to compete as hard for deposits. Online banks typically pay higher rates because they have lower overhead costs and can pass those savings to customers. A national bank might offer 4.0% on a one-year CD while an online bank offers 5.0% for the same term.

The amount of money you deposit can also affect the rate. Some banks offer higher rates on larger deposits—say, $25,000 or more. A few banks offer lower rates on very small deposits under $1,000. Always check whether the rate you see applies to your deposit size.

How CD terms affect what you earn

The length of time you commit to leaving your money in the CD is called the term. Common terms are three months, six months, one year, two years, three years, and five years. Longer terms usually pay higher rates because the bank gets to use your money for a longer period.

A typical rate structure might look like this: a three-month CD pays 3.5%, a one-year CD pays 4.5%, and a five-year CD pays 5.2%. The longer you lock your money away, the more interest you earn per year. However, this is not a rule—sometimes rates are inverted, meaning short-term CDs pay more than long-term ones. This happens when the economy is uncertain or when the Fed is expected to lower rates soon.

Choosing a longer term means you earn more total interest, but you also cannot touch the money without paying a penalty. If you need the money before the CD matures, the bank will charge you an early withdrawal penalty, which is usually several months' worth of interest. This penalty can wipe out some or all of your earnings.

What happens when your CD reaches maturity

When your CD term ends, the bank pays you your principal plus all the interest you earned. This is called the maturity date. On that date, you have a choice: withdraw the money, or let the bank automatically renew the CD for another term at the current rate.

Most banks automatically renew CDs unless you tell them not to. This means if your one-year CD matures and you do nothing, the bank will put your money into a new one-year CD at whatever rate they are offering that day. That rate may be higher or lower than what you earned before. If rates have fallen, you could end up earning less money on the renewal.

To avoid an unwanted renewal, contact your bank a few days before the maturity date and ask them to let the CD expire without renewing. The money will then sit in your regular savings or checking account, earning little or no interest, until you decide what to do with it.

Comparing CD rates across banks

Because rates vary so much between banks, spending 15 minutes comparing offers can mean hundreds of dollars in extra earnings. Start by listing the banks you already use, then add two or three online banks known for competitive rates. Write down the rate each bank offers for the term you want, along with any minimum deposit requirement.

Pay attention to whether the rate applies to your deposit size. A bank advertising 5.5% might only pay that rate on deposits of $50,000 or more. If you are depositing $10,000, you might get 4.8% instead. The fine print matters.

Also check whether the bank is FDIC-insured. This means if the bank fails, the federal government protects your deposit up to $250,000. All legitimate banks are FDIC-insured, but it is worth confirming before you deposit money with an unfamiliar institution.

The trade-off between safety and earning potential

CDs are one of the safest places to put money because your deposit is may provide and insured by the FDIC. You know exactly how much you will earn before you deposit. This certainty comes at a cost: CD rates are lower than what you might earn by investing in stocks or bonds.

If you have money you will not need for several years, a longer-term CD locks in a may provide return. If you might need the money sooner, a shorter-term CD gives you more flexibility, though it pays less interest. Some people split the difference by opening multiple CDs with different maturity dates—a strategy called CD laddering—so that some money becomes available each year while the rest continues earning interest.

Frequently Asked Questions

Do I pay taxes on CD interest?

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 until the CD matures. Your bank will send you a 1099-INT form at tax time showing how much interest you earned. You report this on your tax return.

Can I withdraw money from a CD before it matures?

You can, but the bank will charge you an early withdrawal penalty. The penalty is usually three to six months of interest, though it varies by bank and CD term. If you withdraw early, you lose some or all of the interest you earned. Some banks allow penalty-free withdrawals after a certain period, so check the terms before you deposit.

What is the difference between a CD and a savings account?

A savings account lets you deposit and withdraw money whenever you want, but it pays very low interest—often less than 0.5% per year. A CD locks your money away for a set term but pays much higher interest in return. You choose based on whether you need access to the money or can commit to leaving it alone.

Do online banks really pay more than big banks?

Usually, yes. Online banks have lower costs because they do not operate physical branches, so they can offer higher rates. A national bank might pay 4.0% on a one-year CD while an online bank pays 5.0% for the same term. The trade-off is that online banks may have less customer service by phone.

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

The FDIC protects your deposit up to $250,000, so you will not lose your money. The FDIC will transfer your CD to another bank or pay you directly. Your interest earnings up to the maturity date are also protected. This is why checking FDIC insurance status matters before you deposit.