Deposit Account Calculator

A deposit account calculator helps you determine the interest earned on a deposit over time. Whether you're comparing savings accounts, certificates of deposit (CDs), or money market accounts, this tool provides quick and accurate results based on your inputs.

How to Use This Calculator

Using the deposit account calculator is simple. Follow these steps:

Enter the principal amount (the initial deposit).
Select the interest rate (annual percentage yield or APY).
Choose the term length (in years or months).
Select the compounding frequency (annually, monthly, etc.).
Click "Calculate" to see the results.

The calculator will display the total interest earned and the future value of your deposit. You can also view a growth chart to visualize the compounding effect over time.

Formula Used

The calculator uses the compound interest formula:

A = P × (1 + r/n)^(nt) Where: A = Future value of the deposit P = Principal amount (initial deposit) r = Annual interest rate (in decimal) n = Number of times interest is compounded per year t = Time the money is invested for (in years)

For example, if you deposit $1,000 at an annual interest rate of 5% compounded monthly for 2 years, the future value would be calculated as follows:

A = 1000 × (1 + 0.05/12)^(12×2) A ≈ $1,104.08

Worked Examples

Example 1: Savings Account

Suppose you deposit $5,000 in a savings account with a 3% annual interest rate, compounded monthly, for 5 years. Using the formula:

A = 5000 × (1 + 0.03/12)^(12×5) A ≈ $5,788.13 Total interest earned = $5,788.13 - $5,000 = $788.13

Example 2: Certificate of Deposit (CD)

A CD with a $10,000 principal, 4.5% annual interest rate, compounded quarterly, for 3 years would be calculated as:

A = 10000 × (1 + 0.045/4)^(4×3) A ≈ $11,368.89 Total interest earned = $11,368.89 - $10,000 = $1,368.89

Deposit Comparison Table

Compare different deposit options using the table below:

Deposit Type	Interest Rate	Compounding	Minimum Deposit	Withdrawal Penalty
Savings Account	0.5% - 1.5%	Monthly	$100	None
Money Market Account	1.0% - 2.5%	Daily	$1,000	None
Certificate of Deposit (CD)	2.0% - 5.0%	Quarterly	$1,000	Early withdrawal penalty

Frequently Asked Questions

What is the difference between APY and APR?

APR (Annual Percentage Rate) is the simple interest rate, while APY (Annual Percentage Yield) includes the effect of compounding interest. APY is always higher than APR for the same interest rate.

How often should I compound interest?

The more frequently interest is compounded, the higher the future value of your deposit. Common compounding frequencies are monthly, quarterly, and annually.

Can I withdraw money from a CD early?

Yes, but you may incur an early withdrawal penalty. Check the terms of your CD to understand the fees and conditions.