There are no fees for any level of this competition. All Indian citizens studying in classes from std VIII to XII of any board are eligible. Those who have given their class XII exams and will not be joining university until June of the year of the International Olympiad, are also eligible.
NRI students with Indian passports from countries which do not participate in the Olympiad are first encouraged to organize a team from their country with the help of their school and if such is not possible, they may apply for the InPO.
To get a hang of basics of philosophy follow the links on http://philo.abhinav.ac.in/HighSchool.htm as also the assignments posted on our blog at http://reason.abhinav.ac.in . You may also go through resources available at https://drive.google.com/drive/folders/18lgXo_vpnYKnEUQ_VSOdlRSZ_j0t2QNz?usp=sharing