Hello aspirant!
Hope you are doing well!

I regret to inform you that, You question is not clear. I assume you are asking about the fees structure of IIT and NIT

For NITs

• The fee structure is decided considering the categories for which fees are to be determined. Fees for candidates of reserved category is less in comparison to unreserved category candidates.

• Certain component of fees like hostel fee, mess charge varies for every NIT and is decided by the respective institute.
  
  To know fees of different NITs refer to https://engineering.careers360.com/articles/nits-btech-fee-structure
  
  To know the fee structure of IITs refer to https://engineering.careers360.com/articles/iit-fee-structure

Dear Candidate,

Let me guess that, you are asking for the payment methods to pay the fees for IIT's and NIT's . So, let me clear you, that there are many ways to pay the fee. You can pay by Demand draft or you can pay by credit or debit card. Moreover, you can check the brochure of your respective college. You can check all the methods of fee payment there. You can also ask from your college officials regarding the payment of fees. But if you mean something other in the question, then please post a new question with brief info.

Hope this helps.