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December 2023

What is Compound Interest and How Does It Work?

Learn how compound interest can help your savings grow exponentially over time and why it's called the eighth wonder of the world.

📖 5 min read•🎯 Financial Education
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Financial Insights

Understanding Compound Interest

Compound interest is the interest you earn on both your original money and on the interest you keep accumulating. It's often called the "eighth wonder of the world" because of its powerful effect on growing wealth over time.

Simple Interest vs Compound Interest

Simple interest is calculated only on the principal amount. Compound interest is calculated on the principal amount plus accumulated interest.

Example: If you invest $1,000 at 7% annual interest for 30 years:
• With simple interest: $3,100
• With compound interest: $7,612
That's more than double the growth!

Why Compound Interest is Powerful

  • Exponential growth: Your money grows faster each year
  • Time is your friend: The longer you invest, the more dramatic the growth
  • Small contributions matter: Regular investments significantly boost results

Real-World Applications

Compound interest works in:

  • Savings accounts
  • Retirement funds (401k, IRA)
  • Investment portfolios
  • Even in reverse with compound debt
Pro Tip: Start investing early! Someone who starts at age 25 will have significantly more at retirement than someone who starts at age 35, even with the same contributions.

Use our compound interest calculator to see how your money can grow over time.

Ready to Crunch Your Numbers?

Use our financial calculators to apply these concepts to your personal situation.

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What is Compound Interest and How Does It Work? - Financlytics Blog | Financlytics