"There are currently about 81 million internet users in India-a number that will nearly triple by around 2015 to 237 million," the report said.
"Internet users in the BRICI countries will experience annual growth of 9 to 20 percent from 2009-2015" the management consulting firm said.
Describing India as a "low-maturity and high growth market", BCG said internet penetration rate in India is expected to reach 19 percent by 2015, up from the current seven percent.
India's internet use is concentrated mainly in the larger cities, where many users are migrants from smaller towns. This group tends to have had limited exposure to the internet and therefore typically has a narrower range of online needs than more experienced users.
Currently 60 percent of BRICI internet users are under the age of 35.