The 2008–09 season of the Belgian First Division (also known as Jupiler Pro League after a sponsor) was the 106th season of top-tier football in Belgium. The regular season began on 16 August 2008 and ended on 16 May 2009. Standard Liège were the defending champions.
On 19 April 2009, Mons were relegated after Dender beat Roeselare 3–1 and made it mathematically impossible for Mons to climb into 16th position or higher. Tubize were relegated on 3 May 2009 after a 1–1 draw at home to Anderlecht.
The 2008–09 champions were decided in a playoff because Standard and Anderlecht finished the regular season equal on points and number of wins. Standard won the playoff by 2–1 on aggregate and thereby retained the title.
Location of teams in Belgian First Division 2008–09
Participating teams
The league consisted of 18 teams, the best 16 teams from last season and two promoted teams from the Second Division.
The number of participants was reduced to 16 teams the season after, hence relegation was increased from two to three or four teams.
Team changes from the previous season
Sint-Truidense and Brussels were relegated to the Second Division at the end of the previous season after finishing in the last two places. They were replaced by Second Division champions Kortrijk and promotion playoff winners Tubize.
Source: soccerway.com Rules for classification: 1) points; 2) number of matches won; if teams are still tied a playoff is organised. (C) Champions; (O) Play-off winners; (R) Relegated Notes:
^ abThe championship was decided in a playoff (see below).
Since Anderlecht and Standard were tied on both points and wins, a two-legged playoff was played in order to determine the league champions. Standard won the playoff 2–1 on aggregate and were crowned champions.
Note: The classification was made after the weekend of each matchday, so postponed matches were only processed at the time they were played to represent the real evolution in standings. These postponed matches are:
Matchday 1: Mechelen vs. Club Brugge (played between 4th and 5th matchday)
Matchday 2: Club Brugge vs. Zulte-Waregem (played between 8th and 9th matchday)
Matchday 13: Kortrijk vs. Zulte-Waregem (played between 16th and 17th matchday)
Matchday 19: Gent vs. Anderlecht (played between 22nd and 23rd matchday)