Studies conducted by three premier institutes — NIPFP, NCAER and NIFM — have concluded that unaccounted wealth held by Indians outside the country till 2010 could be as high as $490 billion, besides black money parked within the country as ‘investments’ in sectors like real estate, mining, tobacco/gutka, bullion, films and education.

from Times of India https://timesofindia.indiatimes.com/business/india-business/490bn-in-black-money-stashed-abroad-by-indians-report/articleshow/69935182.cms