The rankings were based on prize money won during the season, calculated in Pound sterling.[2][3] The top five players on the rankings earned status to play on the 1991 European Tour (Volvo Tour).[3]
^ abThe number in brackets after each winner's name is the number of Challenge Tour events they had won up to and including that tournament. This information is only shown for Challenge Tour members. It is rare for someone to accumulate many wins on the Challenge Tour as success at this level usually leads to promotion to the European Tour.
^ ab"Challenge Tour 1990". Svensk Golf (in Swedish). No. 12. December 1990. p. 84. Retrieved 14 February 2021. De fem första erhåller ET-kortet utan spel på tourskolan i Frankrike. [The first five receive an ET [European Tour] card without playing in the tour school in France.]