The last day for filing nominations is March 12.
Two BJD Rajya Sabha MPs A U Singhdeo and Dilip Tirkey from BJD and A V Swami (BJD supported Independent) representing Odisha in the Rajya Sabha will be retiring on April 3 this year.
This may pave the way for horse-trading, not uncommon in the state during Rajya Sabha elections, when polling is held on March 23.
The by-polls for the Araria Lok Sabha seat, and the Jehanabad and Bhabua Assembly seats are scheduled to be held on March 11. Also on the list is Jharkhand (2) and Chhattisgarh, Haryana, Himachal Pradesh, Uttarakhand (1 each).
The BJP's increasing strength will give confidence to the party to easily pass key legislations like insurance bill, Triple Talaq bill, which is now delayed and blocked by the opposition parties in the lower house.
While 10 seats from Uttar Pradesh will be vacated, Maharashtra and Bihar will witness elections for six seats each.
The three Upper House seats that will fall vacant in April here include that of Abhishek Manu Singhvi and Narendra Budania of Congress and Bhupendra Yadav of BJP. The ruling party's floor managers in the Upper House claim that the NDA will get a majority in the 245-member House if members of "friendly parties" like the AIADMK, TRS, BJD and YSR are also added to the ruling alliance tally. In Rajasthan, now under BJP rule, the BJP hopes to bag all three against the one it has, and in Maharashtra the party and its ally Shiv Sena are expected to bag four of the six seats against the two they have at present.
From BJP's side terms of several Union Ministers, including Arun Jaitley, Prakash Javadekar, Ravi Shankar Prasad, Dharmendra Pradhan, J P Nadda, Thaawar Chand Gehlot and Ramdas Athawale are ending.