Since its founding, IRO leaders and members often gather to lead inter-religious prayers at national and private occasions. 

Led by Mr Harbans Singh, the IRO Prayer group has performed inter-religious prayers in public for the groundbreaking of significant works such as the MRT, Singapore armed forces, and other national occasions. The group also joins the annual Kranji War Memorial since 1966. 

Inter-religious prayers are offered for humanity and peace in the face of natural disasters, conflicts and tragic accidents. The IRO serves Singapore in times of need and complements the compassion and sentiments of our people.