Currently, my elder brother is placed at Cognizant as a senior business analyst at 14 Lakh CTC in IIM Kashipur. How much would he be earning in the next 5 years?

The IT industry today is flourishing and is facing a huge shortage. So he will definitely land a great job especially if he is a BBA/BCOM graduate.

Cognizant does not have very fast growth. So depending on his performance, and economic and academic background, he might witness growth between 2% to 10%. If he is an engineer from the IT stream, his growth will be faster. 

In my personal opinion, his IT background does not make him suitable for IIM Kashipur or even Lucknow. An IT software engineer with 2 years of experience earns around 18 to 20 lakh.