Imagine you give money to your friend to invest for you. After a year, they return your money plus €100 profit.
This is where people make a mistake: many think "ok, great, I made €100". Then they wait another year to make another €100.
But compound interest works differently.
Money that makes money that makes money
Year 1: You invest €1,000. You gain €100. Total: €1,100.
Year 2: Now you invest €1,100 (not €1,000). You gain €110. Total: €1,210.
Year 3: You invest €1,210. You gain €121. Total: €1,331.
See what happened? Every year you don't make €100. You make MORE each time because you're earning interest on the previous interest.
It's like a snowball. It starts small. But it rolls downhill and grows, grows, grows.
The real numbers
€1,000 at 10% annually for 30 years:
- Simple (no compounding): €4,000 total (you made €3,000)
- Compound: €17,449 total (you made €16,449)
The difference is brutal.
The only work it does is exist
You don't have to do anything. Your money makes money while you sleep, while you work, while you watch Netflix.
Literally, time works for you.
Your grandparents' advice was right
"Start young" sounds boring. But it's REAL.
If you start at 20 vs 30, over 40 years the difference is HUGE.
Why? Because those extra 10 years aren't 10 years of interest. They're 10 years of compound interest. Which is exponential.
It's reason number one why people who start early retire young. Not by doing anything special. Just by letting time do its work.