The 8th Wonder of the World
"Compound interest is the eighth wonder of the world. He who understands it, earns it; he who doesn't, pays it." — often attributed to Einstein
Simple vs Compound Interest
- Simple interest: Interest earned only on principal. ₹10,000 at 8% for 10 years = ₹8,000 interest.
- Compound interest: Interest on principal + previous interest. ₹10,000 at 8% for 10 years = ₹11,589 interest.
Same rate, same period — compound earns 44% more.
Why Starting 5 Years Earlier Doubles Wealth
Investing ₹5,000/month at 12% return:
- Start at 25, retire at 60 (35 years) → ₹3.24 Crore
- Start at 30, retire at 60 (30 years) → ₹1.76 Crore
5 fewer years = ₹1.48 Crore less. Time is the multiplier.
The Rule of 72
Divide 72 by your annual return rate to find how many years to double your money.
- At 6% → money doubles in 12 years
- At 8% → doubles in 9 years
- At 12% → doubles in 6 years
Calculate Now
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