Compound Interest – The Magic of Time

Estimated time: 4 minutes

What is compound interest?

Compound interest means earning returns on both your original money and the returns you've already earned. Over time, this creates exponential growth—your money grows faster and faster.

A simple ₹ example

Let's say you invest ₹10,000 at 12% per year:

After 10 years: approximately ₹31,000
After 20 years: approximately ₹96,000
After 30 years: approximately ₹300,000

Notice how the growth accelerates—the last 10 years add more value than the first 20 years combined!

Rule of 72

A quick mental math trick: Years to double ≈ 72 ÷ annual return

Examples:

At 8% return: 72 ÷ 8 = 9 years to double your money
At 12% return: 72 ÷ 6 = 6 years to double your money

How to make compounding work for you

Start early – The earlier you start, the more time compounding has to work.
Stay invested for long periods – Don't withdraw during market dips.
Invest regularly – SIPs help you benefit from compounding consistently.
Reinvest dividends – Instead of withdrawing dividends, reinvest them to compound faster.

Upward curve showing compound growth over 30 years

Blanket's compound growth visual mirrors the ₹10,000 example so learners immediately connect the numbers in the story with the on-platform calculator output.