For those looking to get ₹1 lakh per month after retirement, inflation should be taken into consideration. Using online calculator, with a conservative post-retirement return of 6% per annum and accounting for 5% inflation, estimated corpus comes to around ₹2.5 crore, said NDTV Profit. This would generate ₹1 lakh per month, adjusted annually for inflation, over 25 years, it added.