Hi Lakshman!

B.Tech course expense at IIT Madras is INR 1 lakh for every annum.There are a number of scholarship options available for students with the special scholarship granted by the government to students from SC/ST and OBC categories. Fee is same for any category but for SC/ST and OBC there will be certain scholarships which will be decided by government and you may also get other scholarships.

Hope this helps.

All the best!