The Power of Compound Interest.
Watch your money grow. Calculate the compound interest effect for your savings plan or investment.
Compound Interest: The Eighth Wonder of the World
Compound interest is the most powerful mechanism for building wealth. When you reinvest your returns, you earn interest on your interest - and the effect accelerates over time.
Time Is Your Best Ally
The earlier you start saving, the more compound interest works in your favor. Even small monthly amounts can grow into substantial sums over 20-30 years.
Return vs. Risk
Higher returns typically come with higher risk. Historical stock market returns average 7-8% per year before inflation, while savings accounts currently yield only about 1-2%.
Example: 200 Euro Monthly Savings Plan
If you invest 200 euros monthly at an average return of 7% per year, after 30 years you will have accumulated approximately 227,000 euros - from only 72,000 euros of your own contributions.
More Helpful Calculators & Guides
Sources & References (2025)
All calculations are based on the official legal provisions for 2025. Despite careful research, no guarantee is given for correctness. This calculator does not replace professional tax advice.