hello sir,

Basically sir the fee of any IIT  and NIT have based on the income .

So,I am giving you the fee structure of IIT Madras,

According to me , all rest  IIT will take approx same fee.

 GE/OBC Category                                                                               Grand total fee 

1.whose parental income is above Rs.5 Lakhs per annum                        Approx 1 lacs

2.whose parental income is between Rs. 1L and Rs.5L per annum             Approx 50k

3.whose parental income is below Rs.1 Lakh per annum                          Approx 10k

4.SC/ST Category -with Scholarship                                                        Approx 5-10k

for more information you can go through this link

https://www.iitm.ac.in/fees

copy this link and paste another tab then you will get the idea of fee structure of IIT Madras.

hope it will help you.