Conversely, GBK Kokkola and Ilves/2, were relegated to the Naisten Kakkonen at the conclusion of the 2019 season.

The teams play in a double round-robin series for a total of 22 rounds.

The top ranked team at the end of the season gains promotion to the Kansallinen Liiga, unseating the tenth (last) ranked team of the Kansallinen Liiga which is relegated to Naisten Ykkönen.

The second ranked team in the Naisten Ykkönen and the ninth ranked team of the Kansallinen Liiga face off in a best of three series, the winner of which gains promotion to/remains in the Kansallinen Liiga and the loser remains in/is relegated to the Naisten Ykkönen.

However, the concerns were not realized and on 15 May 2020, the Football Association of Finland announced that the 2020 Naisten Ykkönen season would be played with a modified format, a single round-robin series (11 matches) and three regional blocks of four teams, played as a double round-robin series (6 matches), for a total of 17 rounds.