The contest, which is the world's biggest exercise in democracy, began on April 7 and will wrap up on May 12. The results are expected four days later. The survey by the NDTV network forecast that the opposition alliance led by the Bharatiya Janata Party (BJP) would win 275 seats in the 543-seat Lok Sabha, 16 more than predicted in the last survey a month ago.
The BJP, led by the hardliner Narendra Modi, would win 226 seats but it would avoid the need to find new coalition partners after results are announced on May 16. Its existing allies would push it over the 50 percent threshold, according to the survey released late Monday.
The centre-left Congress party, which leads the current coalition government, would see its tally of seats drop to an all-time low of 92, the same poll projected.
All previous polls have forecast that the BJP-led alliance known as the NDA