CD Calculator: Estimate Your Savings Now

A Certificate of Deposit (CD) calculator can be used to calculate how much interest you can earn from a Certificate of Deposit. A Certificate of Deposit is a savings account that can be offered by banks and credit unions within the USA. You deposit a set amount of money in the account and earn interest over a set period of time at a pre-agreed interest rate.

CDs usually have a fixed interest rate over a set period of time. This could be 3 months, 6 months, 1 year, 2 years, or 5 years. You may earn a higher interest rate than you would with a regular savings account by depositing your money for the full term. However, you may lose out to an early withdrawal fee if you withdraw your money before the term has finished.

Our CD calculator can be used to work out how much you could earn from your CD. Simply enter your starting deposit, annual percentage yield (APY) or interest rate, deposit term and compounding type.

This calculator can be used if you are saving for a house, creating an emergency fund, saving for retirement or seeking a reliable short term investment.

How to Use the CD Calculator

Using our CD calculator is very simple. To calculate your Certificate of

Deposit returns, complete the following:

Enter Your Starting Deposit

Enter the amount of money you wish to deposit into your CD. For example,

$5,000 or $10,000.

Enter Interest Rate or APY

Enter the interest rate or annual percentage yield your bank or credit union is offering.

Enter Deposit Term

Enter how long you wish to deposit your money for. This could be 6 months, 1 year, 2 years or 5 years.

Enter Compounding

Select how often you want to compound your interest. This could be daily, monthly, quarterly, semiannually or annually.

Calculate

Press calculate to calculate how much interest you could earn and how much your CD will be worth.

It will show how much interest you could earn and how much you could get when your CD matures.

If asked for an annual percentage yield enter the APY provided by your financial institution. If asked for an interest rate enter the rate provided.

CD Calculator Formula

Your Certificate of Deposit will earn interest based on your starting deposit, annual interest rate, compounding frequency and investment period.
If your interest is compounded regularly then you can use the following formula:

A=P(1 + r/n) nt
Where,

A = Amount your CD will be worth when it matures.
P = Starting deposit.
r = Nominal annual interest rate (as a decimal).
n = Number of times interest is compounded per year.
t = How long you are investing your money for (in years).
To calculate how much interest you will earn:

I=A-P

Where,

I = Total interest earned.
A = Total amount in your account.
P = Starting deposit.

For example if your interest rate is 4% divide by 100 to turn it into a decimal. 4/100 = 0.04.

If your CD gives you an annual percentage yield (APY) then you need to remember that this already includes compounding. Therefore your estimated balance can be calculated using the following:

A=P(1 + APY)t

Do not use the compounding formula with an APY as you will be double counting the compounding.

Example Calculation

Let’s take a look at how you can use a CD calculator with an example.
You deposit $10,000 into a Certificate of Deposit account with an annual interest rate of 4.00% compounded monthly for 2 years.

Deposit Details

Starting Deposit $10,000
Annual Interest Rate 4.00%
Compounding Monthly

CD Term 2 Years

Number of Compounding Periods 24
Using the compound interest formula:
A=10000(1 + 0.04/12) 12 x 2
A=10000(1.0033333) 24
A ≈ $10,829.94
Interest Earned:
I=10,829.94 - 10,000
I = $829.94

Example Results

Starting Deposit $10,000
Total Interest Earned $829.94
CD Worth $10,829.94

This means after 2 years your $10,000 deposit could grow to approximately $10,829.94 assuming the interest rate and compounding is as outlined.

Understanding Your Results

Once you have entered your details into the calculator there are a few key pieces of information you should know.

Starting Deposit

This is the amount you originally invested when you opened your CD.

Interest Earned

This shows you how much extra money you have made in interest. The higher your interest rate and the longer you invest for, the more interest you will earn.

CD Worth

This shows you how much your CD will be worth once you have invested for the full term. This is how much you will receive once your CD has matured.

Annual Percentage Yield (APY)

APY shows you how much you will earn in a year taking into account compounding. This can help you compare different CDs.

Investment Period

This shows how long your money will be invested for. This will determine when you can withdraw your money.

Understanding these results will help you compare different CDs.

Factors That Impact Your CD Returns

There are a number of factors that can impact how much interest you earn from your Certificate of Deposit.

Starting Deposit

The higher your deposit, the more interest you will generally earn. For example, $20,000 deposit earns approximately twice the interest of a $10,000.

Annual Percentage Yield

APY is one of the most important factors that will impact how much you earn from your CD. The higher your APY, the more you will earn.

CD Term

Longer term CDs may have different interest rates to shorter term CDs. However this does not mean you will earn more.

Compounding

Compounding will impact how often your interest is added to your principal. More frequent compounding can increase your returns.

Interest Rates

Interest rates can be impacted by the Federal Reserve and general economic conditions. Depending on market conditions you may receive different rates.

Early Withdrawal Fees

If you withdraw your money before it has matured you may lose out. Some financial institutions will take a cut of your interest.

Advantages of Using a CD Calculator

A CD calculator can provide many benefits.

Calculate Interest Earned

You can calculate how much interest you could earn before opening a CD.

Compare Different Offers

Compare different interest rates, deposits and terms to find the right CD for you.

Short Term Goals

A CD can be a good way to save for planned expenses such as buying a vehicle, paying for a deposit on a house, going on holiday or paying for education.

Compare Compounding Frequencies

Compare how much interest you could earn with different compounding frequencies.

Create a Savings Plan

Calculate how much you could earn from multiple CDs with different terms and interest rates.

Make Informed Decisions

Calculate how much you could earn before committing your money.
For example if you are planning to buy a house in 2 years you can calculate how much interest you could earn from a 2 year CD.

Accuracy, Assumptions & Limitations

A CD calculator will give an estimated figure based on the information you enter. Your returns may vary depending on your bank’s terms and conditions.

Some key assumptions and limitations to note:

Fixed Interest Rate

Assumes the interest rate given will stay the same.

Compounding Frequency

Based on the compounding frequency you have selected and how your bank pays interest.

APY

APY already includes compounding so entering this as a nominal interest rate can cause inaccurate results.

Early Withdrawal Fees

Early withdrawal fees are not generally calculated.

Taxes

Interest earned from your Certificate of Deposit is generally taxed as ordinary income at a federal level in the USA. You may also pay taxes at a state and local level.

Inflation

Inflation is not taken into consideration.

Bank Specific

Minimum deposits, promotional rates, interest payment and maturity dates can vary between financial institutions.

For the most accurate figure check the CD documents to see the APY, maturity date, compounding and withdrawal terms.

FAQs

What is a CD Calculator?

A CD Calculator is an online tool that can be used to calculate how much interest you could earn from a Certificate of Deposit. Simply enter your starting deposit, interest rate/APY, CD term and compounding frequency to calculate your estimated returns and how much your account will be worth.

How much interest will I earn from a $10,000 CD?

This depends on the APY and how long you invest for. For example, $10,000 CD earning 4% APY for one year would generate approximately $400 assuming the APY is the same for the whole year and the interest is left in.

Is my interest compounded daily or monthly?

Interest can be compounded daily, monthly, quarterly, semiannually or other depending on your financial institution. Check the terms of your account.

Are Certificate of Deposit earnings taxable in the USA?

Yes. Interest earned from most traditional CDs are taxable as ordinary income. Your financial institution will usually include this on a form 1099-INT. You may also pay taxes at a state and local level.

Can I withdraw from my CD before it matures?

Yes. Many traditional CDs allow you to withdraw early however your bank or credit union may charge an early withdrawal fee. This can reduce how much interest you earn. Depending on your account terms your principal may also be affected. No penalty CDs may provide more flexibility.