Dear aspirant

It's quite hard to tell about the cut off marks exactly as it's varies every year depending on difficulty level of question paper, number of candidates appeared, seats availability etc.

There are total seven IISER college in India having around 1700-1800 seats.

IISER,Pune is one of the most demanded college among all of them.

In 2021, cut off ranks for Gen category in IISER college was AIR 3327 for BS (ECONOMIC SCIENCE) IISER BHOPAL.

So if your all india rank is below this in this year exam then you will have chances of getting any IISER college.

Hope this information helps

All the best