CD Calculator

Enter your deposit, CD term and rate to see what interest you would earn on a certificate of deposit.

CD details




Total interest earned


Total balance


Interest earned

Using this CD calculator

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Written by Spencer Tierney
Senior Writer
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Edited by Sara Clarke
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NerdWallet's CD calculator shows what you can earn with a certificate of deposit, a type of savings account that you leave untouched for months or years. Like regular savings accounts, CDs are safe because they are federally insured. Here’s what to know about CDs and using the CD calculator.

What should I know when choosing CDs?

  • Prioritize finding a high interest rate. Not every bank has competitive rates on its CDs. See our list of the best CD rates.

  • Avoid early withdrawal fees. Although short-term CDs require less time to wait to access your money and therefore less need to incur the penalty to get money early, long-term certificates have more time to earn interest. (Breaking a CD early for a better rate can sometimes make sense, though.)

  • Longer terms don’t always mean higher rates. The 2024 rate environment has seen higher rates on the best one-year CDs compared to three- or five-year CDs.

» Not sure what certain concepts mean? Skip down to our glossary of CD terms

How to use this CD calculator

The calculator has sample numbers to provide a starting point, but feel free to use your own numbers.

  1. Enter the deposit amount, or the fixed amount of money you’re comfortable leaving in a CD untouched for the whole term.

  2. Enter the CD term length, and select years or months. Use whole numbers only. For example, choose 18 months instead of 1.5 years.

  3. Enter the APY. Plug in current CD rates at various online banks as well as your bank’s CD rates to compare different options.

🤓Nerdy Tip

Many CD terms tend to be measured in years, but sometimes CDs are described in months. Here’s a quick reference for some terms: 12 months = 1 year; 18 months = 1.5 years; 30 months = 2.5 years; 48 months = 4 years; 60 months = 5 years; 84 months = 7 years; 120 months = 10 years.

How to read your CD calculator results

Total interest earned: The sum the bank pays you based on a CD’s rate, term and initial deposit.

Total balance: The sum you receive when you withdraw after a CD’s maturity date. The total amount includes the initial deposit and all compound interest.

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3 calculator assumptions

This CD calculator uses the following assumptions:

  • You have CDs at a bank and share certificates at a credit union. What isn’t covered are brokered CDs, meaning CDs offered by a brokerage firm, which don’t compound interest.

  • You choose to have interest grow in your CD. Many banks offer two options to receive CD interest: Keep it in the CD for the term, which is most common, or receive interest as regular payments to a separate account. The second option can provide a stable source of fixed income at a regular frequency, such as monthly or quarterly. But taking regular interest payments out of a CD means that interest doesn’t compound since your ongoing CD balance doesn't increase.

  • You don’t withdraw from a CD early. Keeping your money in a CD until the maturity date ensures you earn the full amount of interest. An early withdrawal usually means paying a penalty and forfeiting the remaining interest you would’ve received.

Compare top CD rates

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Member FDIC

Marcus by Goldman Sachs High-Yield CD

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6 months

Bask Bank CD

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9 months

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Marcus by Goldman Sachs High-Yield CD

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1 year

» Learn more: Highest CD rates

Glossary of CD terms

Deposit amount: The upfront sum you’re putting into a single CD. You can usually only add money to a CD once.

CD term length: The total time frame that a CD is open for. Some of the most common terms are three months, six months, one year, 18 months, three years and five years. Learn about choosing between short-term and long-term CDs.

APY: Annual percentage yield is a percentage that reflects the amount of money a bank pays you, or the interest, in a bank account in one year. It includes compound interest, which is the interest earned on both an account balance and previous interest. Put more simply, APY is the annual rate of return that factors in compounding. CD rates are usually quoted as an APY, and banks and credit unions usually compound interest daily or monthly. Learn about how APY works.

🤓Nerdy Tip

CD rates have started to dip and may continue to fall, especially if the Fed decides to drop its rate. However, you can still lock in a high rate while they’re still around.

CD interest: Money your bank pays you on the balance of a CD, usually expressed as an annual percentage yield. Learn more about how interest works.

Compounding frequency: The number of times your bank pays interest, such as daily, monthly or annually. Learn more about compound interest.

Frequently asked questions

No, CD rates have started to drop in 2024, after two years of rate increases. See our CD rate forecast for what’s in store for CDs or see historical CD rates for a look back.

CDs are safe investments that can help with some short-term savings goals, and you can find rates higher than regular savings accounts have. But CD rates have started to fall in 2024. And keep in mind that a CD’s fixed rate may not always be enough to protect your cash against inflation. You may need to consider multiple ways to save. See more details in our article on the pros and cons of CDs.

This depends on the CD rate. A five-year CD at a competitive online bank could have a rate of 4.00% APY, which would earn around $108 in interest in five years. A five-year CD with a 1% rate would earn about $26. If your savings are closer to $500 than $10,000, you might also consider a high-yield savings account or rewards checking options, which can have competitive interest rates with maximum balance limits.

This depends on the CD rate. A one-year CD with a rate of 5% APY earns $500, while the same CD with a 1% APY earns $100 and one with 0.10% APY earns $10. Compare the best one-year CD rates.

Generally a CD has an early withdrawal penalty, which can range from a few months' to a year's worth of earned interest, depending on the bank and the CD term length. Longer term lengths usually have bigger penalties. These penalties occur only if you take out money before a CD term expires. Try our calculator to see what an early withdrawal penalty costs. If you want the flexibility of withdrawing early without a penalty, consider a no-penalty CD.

Yes, CDs are federally insured up to the maximum, $250,000 per account holder. Learn more about how CDs are FDIC insured.

Share certificates, or certificates, are the credit union equivalent of CDs. A credit union is a not-for-profit banking institution where customers are technically part owners. Owning part of a company means owning shares, hence the use of the word “share” at a credit union. Regular savings accounts are often called share accounts.

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What term length should you get?

Historically, the longer the term, the higher the rate tends to be. But the current rate environment shows higher rates on shorter terms. Just remember that even if a short-term CD has a higher rate, it has less time to earn interest than a long-term CD does.

Standard terms range from three months to five years. Most have early withdrawal penalties, so be sure you won’t need the money before the term expires.

» Not sure how to open a CD? Here's a step-by-step guide to opening a CD account

How much interest will you earn on a CD?

The amount of interest earned on a CD varies based on your deposit, CD rate and term length. For example, a $10,000 deposit in a five-year CD with 3.50% APY would earn around $1,877 in interest. The same CD with a 1.50% APY would earn around $773 in interest, and the same CD with a 0.01% APY would earn only $5 in interest.

» Want to see other calculators? Check out our list of NerdWallet’s financial calculators

How to calculate CD interest

If you’d prefer to try your hand at calculating interest without a calculator, use the compound interest formula:

A = P(1 + r/n)^nt, where:

  • A = ending amount (this means original balance plus all interest earned after n years).

  • P = original balance (or your initial deposit, since there are typically no other contributions to CDs).

  • r = interest rate (as a decimal)*.

  • n = number of times interest is compounded per year (typically 365 for daily, 12 for monthly, 4 for quarterly).

  • t = time (in years).

Once you get a result for A, subtract P from A (A - P) to get the interest amount.

*Note: Interest rate and APY are slightly different. To be more exact, use the interest rate in the formula. See our APY vs. interest rate explainer, which includes a calculator to convert APY to interest rate.