How difficult is it to get a branch change at BITS Pilani after first year?

It is indeed very challenging to get a branch change at BITS Pilani after the first year. I will never recommend anyone to come here with a branch change in mind as it solely depends on your luck and immense hard work. 

The CGPA cutoff here is very high, and only geniuses are capable of changing their branches. 

Even if there are a few subjects you are weak at your chances become minimal. You will have to work as hard as 7-8 hours daily and even that won’t guarantee a branch change. You will have to sacrifice everything including sports, your passion, and sleep. 

So I will advise you to think better and go to another college if you are not getting your preferred branch here.