Hi Asoke Kumar Giri,

There is no official release of cutoffs by the IISERs that tell about the minimum marks in the IISER IAT test to get any seat in any IISER.

But there are certain trends that can be considered to predict the minimum marks.

So going through the trend of last year, you will need around 75–80 marks to get an offer letter at least from an IISER(I.e the newest IISERs Berhampur and Tirupati). 85–95 was the range for getting your (at least) 3rd or 4th preference. >95 was for your 1st or 2nd preference.( THIS IS IRRESPECTIVE OF CATEGORY RESERVATION)

It is suggested that you wait till the last rounds of allotment to track if you are offered a seat. Post allotment rounds also occur!

Hope this helps:)