My name is Zach, and I write at Four Pillar Freedom, where I tend to tackle financial topics through data visualization. While J.D. is on vacation, I offered to explore one of his favorite topics: the effects of saving rate versus investment returns. Albert Einstein supposedly once said that compound interest is the eighth wonder of the world. But does data actually support this claim? In this post, I explore the nature of compound interest, how long it takes to become an important factor in wealth accumulation, and whether or not it actually matters much for people who hope to achieve financial independence in a relatively short time. What matters more: your saving rate or your investment returns? Accumulating Wealth in the Early Years Suppose your goal is to achieve a net worth of $1 million.