Baba Bagga Singh Ji was born on May 15, 1864 in village Chuslevar, Tehsil, Kasur, District Lahore (now in Pakistan). His father was Sardar Sawan Singh ji. Before his birth, his mother Sardarni Shobhi Ji used to have darshan (vision) of Guru Nanak Dev Ji. From his childhood, he was inspired spiritually and spent long hours in meditation. As he grew older, Baba Bagga Singh Ji gained a comprehensive knowledge of Panj Granthi, Bhakton ki Vani, Guru Granth Sahib, and Yog Vashisht (spiritual studies) from the Sage Gian Singh.
At the age of 18 he joined army. He was posted to Multan (now in Pakistan) where he came in contact with Baba Jaimal Singh ji.
On August 1, 1883 he was initiated along with two of his colleagues by Baba Jaimal Singh Ji. In April, 1894, Baba Jaimal Singh Ji during his visit to Chuslevar, entrusted the holy task of blessing the devotees with Naam to Baba Bagga Singh Ji, while at the same time directed him to find another place to live.
In 1900, Baba Bagga Singh ji bought a piece of land and established the Dera now known as Radha Soami Dera Baba Bagga Singh, Tarn Taran which was inaugurated by Baba Jaimal Singh ji by delivering the first satsang at the Dera. Thereafter, satsang and initiation of devotees has continued at the Dera till date.
Following the order of Baba Jaimal Singh Ji, and with his blessings, Baba Bagga Singh Ji continued to work for the spiritual benefit and enlightenment of devotees and disciples for over 50 years. It was on Thursday afternoon, 12:38 PM, July 6th, 1944 (23 Haar, 2001 as per the Vikrami era), on a full moon day, at the Dera Tarn Taran, that Baba Bagga Singh Ji left for his Eternal Abode.