Birla School Pilani is traditionally a boarding school and can boast of the best boarding facilities in the region. The boarding system of the school has been segregated into two parts viz. Junior Hostel wing and Senior Hostel wing. Junior Hostel wing accommodates small children from classes IV to VIII and is called Birla Hostel. It can accommodate up to 200 students. The Hostel functions under the able guidance of a Chief Warden, House Maters and Assistant House Masters. It is equipped with all the modern facilities like a spacious Dining Hall, Activity Centre, Skating rink, Football and Cricket Fields and Basketball Court.

The Second part of the boarding is called Rajasthan Hostel. It houses the senior students ranging between classes IX to XII. It has a huge campus and can accommodate up to 600 children. The hostel has been horizontally divided into four blocks and provides comfy rooms to the pupils on twin sharing basis. The ambience of the hostels is in perfect harmony with the needs of the students. All modern activities like swimming, horse riding, Indoor as well out door games, library, e-learning resource centre, etc. are available here. It provides ample opportunities for the overall growth and development of the students. This hostel is also functioning under the efficient guidance of a Proctor, House Masters and Assistant House Masters.