Simple Investment Return Calculator
Project how a starting amount plus regular contributions grows over time at an expected rate of return. All figures are nominal dollars — see the note below the results.
Inputs
Starting principal: $10,000
Contribution per month: $500
≈ Weekly: $115 · Biweekly: $231 · Annual: $6,000
Expected annual return: 7.0%
A forward-looking assumption, not a guarantee — try a range of values.
Investment period: 20 years
Contribution frequency
Adjust the inputs above, then click Calculate to see your projected growth.
All figures are nominal dollars — not adjusted for inflation. This tool models a fixed expected rate of return; real markets vary year to year. Not financial or tax advice. Contributions are added at the end of each period, and the expected return you enter is always an effective annual rate — switching contribution frequency changes how often contributions land, never how fast your existing balance grows.