Economics
Compound Interest Principles
Quick fact
Compound interest allows your money to earn more money, creating a snowball effect as your investment grows.
Why this is interesting
Did you know that a small amount of money can grow into a large sum over time just by sitting in your bank account? It's not magic—it’s compound interest.
Read the full explanation
Understanding Compound Interest Principles
Imagine you save $100 and earn 5% interest each year. After the first year, you have $105. In the second year, that $105 earns another 5%, so now you have $110.25. This is compound interest: earning interest on your original money and the interest you’ve already earned.
A deeper explanation
Compound interest works because the interest earned in each period is added to the principal, increasing the base amount for future interest calculations. Over time, this leads to exponential growth rather than linear growth. The more frequently the interest is compounded (e.g., monthly vs. annually), the faster your money grows. This principle underlies many investment strategies and is a key driver of long-term financial success.