Compound interest effect rewards early savers

The power of compound interest allows individuals who start saving earlier to accumulate significantly more wealth than those who contribute larger sums later in life. For example, starting at age 25 and saving for only ten years can result in a larger portfolio by age 65 than someone who starts at 35 and saves consistently for 30 years.

This effect occurs because reinvested earnings—such as interest, dividends, or capital gains—generate their own returns in subsequent years. This creates exponential rather than linear growth. Using a hypothetical 7 percent annual return, a monthly contribution of 200 euros grows to approximately 34,600 euros after 10 years, but reaches roughly 244,000 euros after 30 years. While 7 percent represents a historical average for broad stock markets, actual results are subject to costs, taxes, and inflation.