Hello Aspirant,

Well,It is entirely depends on your time shedule.
See,You can join coaching any year of your graduation ...you can start self preparation along with it ... but it all depends on your time schedule.
And as we know graduation is compulsory for UPSC exam.So please do not ignore that study.
You have to make a timetable, then utilize your time accordingly.And see If you are preparing for IAS then most importantly you will be very beneficial, if you do time management from now on.
Think on that
Good luck...!!!

Hello

You can start with any year of you graduation but most people take ias coaching in the last year of their graduation. Because academic is also important and most of the people focus first on academic rather then the entrance exam. Ias exam is not predictable so there is not an ideal time to start ,you can even start in your 2 nd year or even start after graduation.

If you are slow learner and take time to understand thing then you can start in 2nd year or if you are quick learner then you can start in 3 or last year of your graduation.

Good Luck