He had little prospect of ascending the throne, yet after the death of his elder brother, Maharaja Prithvi Singh in 1839, he became the regent over the whole state and served as such until the birth of his brother's son, Yuvraj Balwant Singh, who was proclaimed ruler at his birth.

Takht Singh then became the new ruler's regent and served as such until the untimely death of his nephew on 23 September 1841, when he became the Maharaja of Ahmednagar (Himmatnagar).

However, two years into his reign in 1843, Maharaja Man Singh, the then ruler of the head seat of Rathores i.e Marwar (Jodhpur )died.

Later in his life, he served the English East India Company at the time of the Indian Rebellion of 1857[2] and in the year 1862 he received a sanad of adoption.

His first-born daughter, Baiji Lal Chand Kanwarji, would be married in 1843 to Maharaja Sawai Ram Singh II, the Maharaja of Jaipur(1835-1880) making her the Patrani (chief consort) of the Kachwaha ruler.