What is compounding?
Albert Einstein reportedly called compound interest the "eighth wonder of the world." Whether or not he said it, the idea is powerful: compounding is when your investment returns start generating their own returns.
In year one you earn a return on your money. In year two you earn a return on your original money plus year one's return. Repeat for 20–30 years and the growth becomes exponential, not linear.
A simple example
Invest ₹1,00,000 at a 12% annual return:
| Years | Value |
|---|---|
| 5 | ₹1.76 lakh |
| 10 | ₹3.11 lakh |
| 20 | ₹9.65 lakh |
| 30 | ₹29.96 lakh |
Notice how the money barely triples in the first 10 years - but grows nearly 10× over 30 years. The last decade does the heaviest lifting. That's why starting early is everything.
Starting early vs. investing more
Consider two investors:
- Priya starts at age 25, invests ₹5,000/month for 10 years, then stops.
- Rahul starts at age 35, invests ₹5,000/month for 25 years.
Even though Rahul invests more than twice as much money over more years, Priya often ends up with a comparable or larger corpus at 60 - purely because her money had an extra decade to compound. Time beats amount.
The Rule of 72
Want a quick estimate of how long your money takes to double? Divide 72 by your expected annual return:
72 ÷ 12% = 6 years to double
72 ÷ 8% = 9 years to double
At a 12% return, ₹1 lakh becomes ₹2 lakh in 6 years, ₹4 lakh in 12 years, ₹8 lakh in 18 years - without adding a single rupee.
How to put compounding to work
- Start now - even a small amount today beats a large amount later.
- Stay invested - every withdrawal resets the compounding clock.
- Reinvest returns - choose growth options over dividend payouts.
- Be patient - the biggest gains come in the final years.
A disciplined monthly SIP is the easiest way for most Indians to harness compounding. Get started with Parasram India.
