President Susana Díaz chose to terminate the coalition government between her Spanish Socialist Workers' Party (PSOE–A) and United Left (IULV–CA), dissolving the Parliament and calling a snap election for 22 March 2015.

Suffering from voters' anger at Mariano Rajoy's national government management of the economic crisis and the corruption scandals affecting the party nationwide, the PP scored its worst result since 1990.

[5] Podemos and C's remained reluctant to lend support to Susana Díaz's investiture,[6][7] whereas IU was not willing to align with the Socialists again after their previous alliance broke up.

[10] Voting for the Parliament was on the basis of universal suffrage, which comprised all nationals over 18 years of age, registered in Andalusia and in full enjoyment of their political rights.

[11] The 109 members of the Parliament of Andalusia were elected using the D'Hondt method and a closed list proportional representation, with an electoral threshold of three percent of valid votes—which included blank ballots—being applied in each constituency.

[10][12][14] The president had the prerogative to dissolve the Parliament of Andalusia and call a snap election, provided that no motion of no confidence was in process and that dissolution did not occur before one year had elapsed since the previous one.

In July 2013, José Antonio Griñán announced his intention to resign from office in order to "preserve the Regional Government from the erosion of the ERE scandal", a large slush fund corruption scheme involving former leading figures of the regional PSOE's branch, including former development minister Magdalena Álvarez, with former Andalusian president Manuel Chaves and himself being accused of knowing and concealing such a plot.

[16][17] Despite the apparent parliamentary comfort of the ruling coalition, friction between both PSOE and IU remained an issue throughout the entire legislature, especially after Susana Díaz took over the government in September 2013.

[18] In January 2015, tension between both coalition partners reached its peak after IU proposed holding a referendum among its members in June 2015 on whether to remain or withdraw from the government.

[19] In response, Susana Díaz declared that "we need a government which enjoys a stability that currently does not exist", opening the door for a snap election to be held within a short time.

[23] An extraordinary parliamentary plenary session was held on Monday, 26 January, where Díaz announced the dissolution of parliament and the subsequent calling of a snap election for 22 March.

[26] Spanish media speculated that the snap election came as a result of different factors; namely, Susana Díaz's private aspirations to the Spanish Socialist Workers' Party's leadership—despite her publicly refusing it—,[27][28] as well as both Podemos's surge in opinion polls and to prevent the party's exhaustion after all 2015 electoral calls—local and regional in May, Catalan in September and general in autumn—, in a time when opinion polls were still favorable to the PSOE in Andalusia.

[29] On 17 February 2015, one month short of the election, the Spanish Supreme Court charged former Andalusian presidents Manuel Chaves and José Antonio Griñán in the ERE scandal for their possible responsibility in the misuse of the misappropriated public funds.

Further, negotiations between Díaz's PSOE and the opposition parties broke off when, on 13 May—the eve of the third investiture vote—it was unveiled that the Andalusian government had awarded the exploitation of the Aznalcóllar mine to a governmental-favored firm through illegal means and "without observing the slightest rigor" in February–March 2015, previously and during the regional election campaign.

[64] New investiture votes were initially postponed until after the 24 May Spanish regional and local elections as a result of the electoral campaign centering the political focus.