The Magic of Compound Interest
One of the most powerful forces in personal finance isn't a hot stock tip or a perfectly timed investment — it's time itself. When your money earns interest, and that interest earns interest of its own, the effect compounds over the years in ways that can feel almost magical.
The key insight: the longer your money grows, the faster it grows. Start early, stay consistent, and let time do the heavy lifting.
Compound Interest Calculator
Adjust the sliders to see how your money grows over time.
$10,000
7.0%
20 years
$0
Projected Balance
$38,697
after 20 years
Total deposited
$10,000
Interest earned
$28,697
Interest share
74.2%
3.87× your money
Growth Over Time
Interest
Contributions
Principal
Rule of 72:
Divide 72 by your interest rate to find roughly how many years it takes to double your money. At 7%, your money doubles every 10.3 years
— and each doubling is more powerful than the last.
All materials are for educational purposes only and are not to be considered investment, financial, or tax advice. Please consult with a financial advisor or CPA before making financial decisions.