Hello mahesh,

I'm not sure if the COMEDK governing authority offers any fee concession based upon comedk ranks, but some institutes might give some concession/schlorship after you get admission or perform good in your course , for that you need to contact institute directly in which you want to take admission through comedk and ask college authorities if they provide any  concessions.

So its institute dependent you need to contact authorities for it , as for COMEDK authority i dont think they provide concessions

Hope this helps