To build a corpus of ₹3 crore over 20 years, a person will need to invest ₹30,026 monthly in a SIP with a 12% rate of return, NDTV Profit reported. Moreover, a person would need to invest ₹15,810 and ₹8,499 monthly in a SIP for 25 years and 30 years, respectively, to build the same corpus at the same rate.