To become a crorepati by retirement, a 25-year-old person should invest ₹2,000 monthly in SIP with a 12% return rate. By age 60, the person would then have a corpus of ₹1,29,90,538. At the same return rate, a person aged 30 should invest ₹3,000 monthly to make a retirement corpus of ₹1,05,89,741, respectively. Meanwhile, a 35-year-old would invest ₹6,000 monthly.