See exactly how your money grows over time. Interactive charts, year-by-year breakdowns, and scenario comparisons.
Compound interest is the most powerful force in personal finance — small, consistent contributions grow exponentially over time. This visualizer lets you experiment with different scenarios, see year-by-year breakdowns, and truly understand why starting early matters more than investing more.
Same initial deposit and contributions at different return rates.
Albert Einstein reportedly called compound interest the "eighth wonder of the world." Whether he actually said it or not, the math behind compounding is genuinely powerful.
How it works: Compound interest means you earn interest on your interest. If you invest $10,000 at 8% annually, you earn $800 in year one. In year two, you earn 8% on $10,800 — that's $864. Each year, the interest amount grows because your base keeps getting bigger.
The formula: A = P(1 + r/n)^(nt) where P = principal, r = annual rate, n = compounds per year, t = years.
The key insight: Time matters more than amount. Starting 10 years earlier with less money often beats starting later with more. Use the calculator above to see for yourself.