This was a snap election, called roughly one year before the scheduled end of the legislature as a result of the uneasy and controversial drafting of the 2006 Statute of Autonomy of Catalonia, which further expanded the authority of the Catalan Government.

The statutory amendment had been ratified in a referendum on 18 June 2006 after being approved in the Cortes Generales, with roughly 74% of voters in favour of the new Statute and 21% against.

In May 2006, ERC had left the coalition after internal tensions due to its disagreement on the final draft of the Statute of Autonomy approved by the Spanish parliament, thus leaving Maragall without a majority and precipitating the early election call.

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

The 135 members of the Parliament of Catalonia 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.

[4] The president had the prerogative to dissolve the Parliament of Catalonia 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 a previous one under this procedure.

The table below lists opinion polling on the victory preferences for each party in the event of a regional election taking place.

The table below lists opinion polling on the perceived likelihood of victory for each party in the event of a regional election taking place.