[9][10] Her husband is Vijay Kumar Singh who is also a politician with allegiance to the Bharatiya Janata Party (BJP).
Earlier in February 2005, Renu defeated RJD strongman and then minister of the state Ravindra Charan Yadav on a JDU ticket from Udkishunganj assembly constituency in Madhepura.
This time also supported by her fortune, Renu defeated Ranjeet Ranjan, wife of veteran Pappu Yadav.
In the 2014 Lok Sabha elections, Vijay Kumar Singh contested on BJP's ticket from Madhepura constituency.
In 2019, she resigned from the Bharatiya Janata Party, as she was denied Lok Sabha ticket from Khagaria.