Parliamentary elections were held in Bulgaria on 4 April 2021 at the end of the term of National Assembly members elected in 2017. Parties in the governing coalition led by Boyko Borisov lost seats and no party leader was able to form a coalition government within the time limit. This triggered the July 2021 Bulgarian parliamentary election. Background Electoral system The 240 members of the National Assembly are elected by open list proportional representation from 31 multi-member constituencies ranging in size from 4 to 16 seats. The electoral threshold is 4% for parties, with seats allocated using the largest remainder method. Parties and coalitions The incumbent government was a coalition between the conservative GERB party of Prime Minister Boyko Borisov and the nationalist United Patriots alliance (formed from IMRO, Attack and the NFSB), with the support of the populist Volya Movement. Together they held 132 out of 240 seats in the National Assembly. During The Greens' 2020 national meeting, the party representatives voted in favor of a coalition at "the next parliamentary election with the other two members of Democratic Bulgaria". The party representatives voted against a "coalition with any of the political parties in the current National Assembly" - namely, GERB, BSP, DPS, Volya and OP. The deputy chairman of ITN, Toshko Yordanov, said in an interview for the Bulgarian National Radio, that the party "will not enter a coalition with GERB, DPS or BSP". The cochairman of Democratic Bulgaria, Hristo Ivanov, stated in an interview for bTV, that "there will be no coalition with GERB, whether with or without Borisov". The chairman of Bulgaria for Citizens Movement, Dimitar Delchev, announced that his party was joining Stand Up.BG during a public presentation of the citizens' platform at Slaveykov Square, in August 2020. The same was done by the chairman of Volt Bulgaria - Nastimir Ananiev, as well as the chairman of the party Movement 21 - Tatyana Doncheva. The citizens' organization The System Kills Us announced their support for Nikola Vaptsarov as their representative within Stand Up.BG. List When only some of the leaders of a coalition are its official representatives, their names are in bold. All lines with a light gray background indicate support for a party or coalition that has been agreed upon outside of the official CEC electoral registration. Opinion polls The opinion poll results below were recalculated from the original data and exclude pollees that