The Mahagathbandhan (Grand Alliance) fielded 253 candidates for the Bihar Assembly Elections 2025, with Tejashwi Yadav announced as the Chief Ministerial face. The Election Commission had announced the two-phase election schedule on October 6, with Phase 1 (121 seats) on November 6 and Phase 2 (122 seats) on November 11.

The Mahagathbandhan comprises RJD, Congress, CPI(ML), CPI, and CPI(M). The nomination filing deadline was October 17, with scrutiny on October 18 and withdrawal deadline on October 20. This is the first Bihar Assembly election since the 2020 polls and comes amid the NDA government led by Chief Minister Nitish Kumar.