Dear Aspirant,

It is quite difficult to predict the exact situation as it depends on the number of students willing to get admission into the college, the seat matrix etc.

IISERs have a total of about 1700 seats and then about 1300 are reserved for IAT (SCB Channel).

You have a really good chance of getting into an IISER. You have a lower chance of getting IISER Pune, Kolkata, Mohali a decent chance of getting TVM and a really good chance of getting Berhampur, Tirupati and Bhopal.

This depends on what the order of your preferences are as well.

We don't have any official cut-off details and hence this predictions are based  on just experience.

Hope this helps.