The high-profile battle between Modi and Aam Aadmi Party leader Arvind Kejriwal has made the race in Varanasi one of the most important.
Going by all the exit poll results, BJP and its allies are expected to win the national elections.
Election Commission officials have banned victory processions in Varanasi and throughout the electorally-critical state of Uttar Pradesh after results are announced.
The EC decision comes after media reported that Modi is planning a massive street parade for supporters on Saturday if he wins the seat of Varanasi. BJP sources confirmed that Modi will perform a special prayer on the banks of the Ganga.