There are 18 clubs in Ligue 1. During the course of a season, usually from August to May, each club plays the others twice, once at their home stadium and once at that of their opponents, for a total of 34 games, though special circumstances may allow a club to host matches at other venues such as when Lille hosted Lyon at the Stade de France in 2007 and 2008. Teams receive three points for a win and one point for a draw. No points are awarded for a loss. Teams are ranked by total points, then goal difference, and then goals scored. At the end of each season, the club with the most points is crowned champion. If points are equal, the goal difference and then goals scored determine the winner. If still equal, teams are deemed to occupy the same position. If there is a tie for the championship, for relegation, or for qualification to other competitions, a play-off match at a neutral venue decides rank. For the 2015–16 season only, 2 teams were to be relegated and only 2 teams from Ligue 2 were to be promoted, but this decision was overturned and 3 teams were relegated and 3 teams promoted. Thus, it was the 2016–17 season which saw the return of a relegation play-off between the 18th-placed Ligue 1 team and the 3rd-placed team in the Ligue 2 on a two-legged confrontation, with the Ligue 2 team hosting the first game.

Previously, the league utilised a different promotion and relegation format. Prior to 1995, the league's format was direct relegation of the bottom two teams and a play-off between the third-last first-division team and the winner of the second-division play-offs, similar to the Dutch Eredivisie, and the German Bundesliga. The league has also experimented with a "bonus" rule. From 1973 to 1976, a rule rewarded teams scoring three or more goals in a game with one extra point, regardless of outcome, with the objective of encouraging offensive play. The experience was ultimately inconclusive. At the start of the 2006–07 season, the league introduced an Attacking Play Table to encourage the scoring of more goals in Ligue 1 and Ligue 2. The LFP, with the help of the former manager Michel Hidalgo introduced the idea to reward those teams who score the most goals. The table was similar to the previous idea, but was independent from the official league table and clubs were only rewarded with monetary bonuses.

In June 2021, the LFP voted overwhelmingly at its general assembly to contract Ligue 1 back to 18 clubs for the 2023–24 season by relegating four to, and promoting two from, Ligue 2 after 2022–23.

European qualification

As of the 2022–23 season, as determined by the UEFA coefficient, the top three teams in Ligue 1 qualify for the Champions League, with the top two proceeding directly to the group phase. The third-placed team enters in the third qualifying round. The fourth-placed team qualifies for the UEFA Europa League, the fifth for UEFA Europa Conference League. The last Europa League place is determined through the country's domestic cup competition, the Coupe de France. If the cup winner qualifies for Europe through their league position, the sixth-placed team in Ligue 1 will qualify for the Europa League.