Why compounding matters: one $1,000 investment in 2000
Compound growth means your money earns returns, and then those returns earn returns. Time turns a small sum into a much larger one—no extra effort. Here’s a concrete example.
"My wealth has come from a combination of living in America, some lucky genes, and compound interest."
The $1,000 in 2000 example
If someone had invested $1,000 once in 2000 and left it alone for 25 years, with no further contributions:
~6.8× your money
~10.8× your money
Stock market long-term returns have historically been in roughly the 8–10% range (before inflation). The takeaway: a single $1,000 investment, left to compound for 25 years, could grow to several thousand dollars. Now imagine adding more over time—that’s how wealth builds.
Why it’s hard to “feel” compounding
Early on, growth feels slow. After a few years, the curve starts to steepen. The same 8% on $10,000 is $800; on $100,000 it’s $8,000. The dollar amount grows because the base grows. That’s compounding—each year you’re earning on a larger pile. Start early, stay invested, and let time do the work. This is the “Investing & growth” piece of your Margin Score.
See when you’ll hit $10K, $100K, $1M and the retirement calculator to put compounding to work for your own numbers.
Related research
The ideas in this guide are backed by academic and policy research. We organize fundamental studies by Margin Score pillar on our Research page.
View research for this pillar →Key studies: Determining Withdrawal Rates Using Historical Data.