Calculate how your investments grow over time with compound interest. See yearly projections, total returns, and compare different contribution strategies.
Compound interest is interest earned on both your principal and your previously earned interest. Albert Einstein reportedly called it "the eighth wonder of the world." The key formula is A = P(1 + r/n)^(nt) + PMT × [(1+r/n)^(nt) - 1] / (r/n).
The most important factor is time. Starting 10 years earlier can double your final portfolio. The earlier you start, the more compound interest works in your favor.