In the election aftermath, Iglesias announced his farewell from Spanish politics and his resignation from all of his political and institutional posts. The vote share of both the PSOE and Cs collapsed, with the former being surpassed by Más Madrid and the latter failing to win any seats. The election resulted in a landslide victory for Ayuso's PP, which fell four seats short of an overall majority and secured more votes and seats than all three main leftist parties combined, in what was the best performance since 2011.

Subsequently, the second deputy prime minister of Spain and Unidas Podemos national leader, Pablo Iglesias, announced he would be stepping down from his national cabinet posts in order to run as his alliance's leading candidate in the regional election. Despite both the PSOE and Más Madrid preventively filing motions of no confidence in an attempt to thwart Ayuso's move, the next day the Assembly's bureau provisionally acknowledged the parliamentary dissolution, though it announced a complaint against Ayuso's election call. On 10 March 2021 after the unexpected announcement by the Spanish Socialist Workers' Party (PSOE) and Citizens (Cs) of moves to bring down People's Party-led governments in the Region of Murcia, Madrilenian president Isabel Díaz Ayuso broke her alliance with Cs and called a snap election in the Community of Madrid for 4 May, a move which she had unsuccessfully attempted twice in 2020. This marked the first time that a regional premier in Madrid made use of the presidential prerogative to call an early election. All 136 seats in the Assembly were up for election.

The 2021 Madrilenian regional election was held on Tuesday,, to elect the 12th Assembly of the Community of Madrid. Regional election in Madrid, Spain 2021 Madrilenian regional election

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