Pratap Singh retained his title and certain privileges, but in 1951 he was deposed by the government of India for allegedly irresponsible behavior.

Pratap Singh was so distraught after he signed the Instrument of Accession for Baroda that he wept in the arms of V. P.

Sayajirao was disappointed in his son's mediocre academic performance, which he attributed to his children having so much wealth and too few goals.

In 1929, he married Shantadevi (1914–2002), the daughter of Sardar Mansinhrao Subbarao Ghorpade of Hasur, in Kolhapur state.

The couple had three sons and five daughters:[4] In the early 1940s, Pratapsinhrao fell in love with a married woman, Sita Devi, a daughter of Maharajah Rao Venkata Kumara Mahipati Surya Rau Maharaja of Pitapuram, who was already married to the Raja of Vuyyur and a mother of three children.