Let's see the case of two examples to understand the need for early investment in life. Starting Year : 2016 Starting Year : 2028 Starting Age : 24 Starting Age : 36 Investment Amount : Rs 20000 per year Investment Amount : Rs 40000 per year Investment for : 24 years till age of 48 (2040) Investment for : 24 years till age of 60 (2052) Retirement at 60 years of age (2052) Retirement at 60 years of age (2052) Investment return : 12% Investment return : 12% Both Arun and Ankit invest for same 24 years. Ankit invests twice the amount as compared to Arun. Who is likely to have more money for retirement? Arun Rs 1000 invested every year for 24 years @ 12% will become INR 118155(from compounding chart) Rs 20000 invested will become : Rs 2363100 This amount of Rs 2363100 is invested for 12 more years @ 12% Rule of 72: If interest rate is 12%, Investment will double in 6 years. Hence in 12 years investment will become 4 times Value of Arun’s investment at Age 60= 4 X 2363100= Rs 9452400 Ankit 1000 invested every year for 24 years @ 12% will become Rs 118155 (from compounding chart) 40000 invested will become : Rs 4726200 Inspite of Investing double the amount, Ankit will have only half the amount of what Arun will accumulate