Extraordinary congresses have to be called by a two-thirds majority of the Board of Directors at least one-and-a-half month in advance of their celebration, though in cases of "exceptional urgency" this deadline can be reduced to 30 days.

In the first round, all registered party members who have their payment fees up to date are allowed to vote for any of the candidates who have been officially proclaimed by virtue of securing the required number of signatures to run.

In the event that no candidate wins the first round outright—which requires securing at least 50 percent of the national vote, being the most voted candidate in at least half of the constituencies and at least a 15-percentage point advantage over the runner-up—a second round will be held concurrently with the party congress, in which party delegates will elect the new party leader from among the two candidates who have previously received the most votes in the first round.

The highest percentage figure in each polling survey is displayed in bold, and the background shaded in the candidate's colour.

Polls show data gathered among PP voters/supporters as well as Spanish voters as a whole, but not among party members, who are the ones ultimately entitled to vote in the primary election.