Compound Interest Calculator - 5% Return
Calculate investment growth at a conservative 5% annual return with monthly contributions.
USD
USD
%
years
Future Value
$90,755.20
Total Contributions$59,000.00
Total Interest Earned$31,755.20
Total Contributions
Interest Earned
Future Value vs Monthly Contribution
How Compound Interest Works
Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods.
Formula
FV = P(1+r)^n + PMT * [(1+r)^n - 1] / r
Where:
Example Calculation
You invest $10,000 and add $200 per month at 7% annual return for 20 years.
- 01Monthly rate: 7% / 12 = 0.5833% (0.005833)
- 02Total months: 20 * 12 = 240
- 03Growth of initial investment: $10,000 * (1.005833)^240 = $40,387.39
- 04Growth of contributions: $200 * [(1.005833)^240 - 1] / 0.005833 = $104,185.06
- 05Future Value = $40,387.39 + $104,185.06 = $144,572.45
- 06Total contributions: $10,000 + ($200 * 240) = $58,000
- 07Total interest earned: $144,572.45 - $58,000 = $86,572.45