In the first stage the sixteen teams are drawn, with seeding, into four groups of four teams each, with each team playing once against the twelve clubs from the other three groups. After each team has played twelve matches, the top two teams of each group qualify for the quarter-final stage.
After the completion of the first stage, the two clubs with the lowest number of points, regardless of the group, will be relegated to the Campeonato Paulista Série A2.
Quarter-finals, semi-finals and finals are played in a two-legged home and away fixture, with the best placed first stage team playing the second leg at home.[1]
In case of a draw in any knockout stage, the match will be decided by a penalty shoot-out.
Tiebreakers
The teams are ranked according to points (3 points for a win, 1 point for a draw, 0 points for a loss). If two or more teams are equal on points on completion of the group matches, the following criteria are applied to determine the rankings:
Updated to match(es) played on April 8, 2018. Source: Soccerway.com Rules for classification: 1st stage 2nd points; 3rd wins; 4th goal difference; 5th goals scored; 6th head-to-head results; 7th least red cards received; 8th least yellow cards received; 9th draw. (B) Qualification for the Campeonato Brasileiro Série D; (C) Champions; (R) Relegated