Savings Account Earning Calculator

Use this savings account earning calculator to project how much your savings will grow over time with compound interest. Simply enter your initial deposit, monthly contribution, interest rate, and time period to see your future balance.

How the Savings Account Earning Calculator Works

Savings accounts typically offer compound interest, which means your earnings earn interest over time. This calculator uses the future value of an investment formula to project your savings growth.

Key Features

Calculate future value of savings with compound interest
Account for regular monthly contributions
Visualize your savings growth with a chart
Understand the impact of different interest rates

How to Use the Calculator

Enter your initial deposit amount
Specify your monthly contribution
Input your annual interest rate
Select the time period in years
Click "Calculate" to see your projected balance

Note: This calculator assumes monthly compounding. For more precise results, consult your bank's specific terms and conditions.

Formula Used

The calculator uses the future value of an annuity formula:

FV = P × (1 + r/n)^(nt) + PMT × (((1 + r/n)^(nt) - 1) / (r/n)) Where: FV = Future Value P = Principal (initial deposit) PMT = Monthly contribution r = Annual interest rate (as a decimal) n = Number of compounding periods per year (12 for monthly) t = Time in years

This formula accounts for both your initial deposit and regular monthly contributions, with interest compounded monthly.

Worked Example

Let's calculate the future value of a savings account with these parameters:

Initial deposit: $1,000
Monthly contribution: $200
Annual interest rate: 3%
Time period: 5 years

FV = 1000 × (1 + 0.03/12)^(12×5) + 200 × (((1 + 0.03/12)^(12×5) - 1) / (0.03/12)) FV = 1000 × (1.0025)^60 + 200 × (((1.0025)^60 - 1) / 0.0025) FV ≈ 1000 × 1.1625 + 200 × (1.1625 - 1) / 0.0025 FV ≈ 1162.5 + 200 × 0.1625 / 0.0025 FV ≈ 1162.5 + 200 × 65 FV ≈ 1162.5 + 13000 FV ≈ $14,162.50

After 5 years, your savings account would grow to approximately $14,162.50 with these parameters.

Frequently Asked Questions

How does compound interest work in savings accounts?

Compound interest means your earnings earn interest over time. Each month, interest is calculated on both your initial deposit and the accumulated interest from previous months, leading to exponential growth over time.

What's the difference between APR and APY?

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

How often is interest calculated in savings accounts?

Most savings accounts calculate interest monthly, which is why this calculator uses monthly compounding. Some accounts may offer daily or continuous compounding, which would affect results.

Can I withdraw money from a savings account?

Yes, but frequent withdrawals may reduce your earnings. Savings accounts are typically designed for short-term savings with limited withdrawals. Check your bank's terms for specific rules.