The party joined the Tamil Maanila Congress alliance for the 1999 Indian general election.

The alliance comprised parties such as Janata Dal, Viduthalai Chiruthaigal Katchi, Indian Union Muslim League and Kamaraj Aadhithanar Kazhagam.

For the 2004 Indian general election, the party joined the People's Alliance comprising Viduthalai Chiruthaigal Katchi, Makkal Tamil Desam Katchi, Janata Dal (United), Indian National League and Puratchi Council.

The 2014 Lok Sabha elections, the party aligned with the Dravida Munnetra Kazhagam as part of the Democratic Progressive Alliance.

The party allied with the Dravida Munnetra Kazhagam for the 2016 state assembly elections as part of the Democratic Progressive Alliance.

For the 2024 Lok Sabha election, Puthiya Tamilagam joined the AIADMK-led Alliance in Tamil Nadu.