The 2025 K League 1, also known as the Hana 1Q K League 1 for sponsorship reasons, will be the 43rd season of the top division of professional football in South Korea, and the twelfth season of the K League 1. Ulsan HD defended their title for the third consecutive year.[1]
The following rules are newly introduced for 2025 season
Introduction of Concussion Substitution Rule
Introduction of Foreign-Born Homegrown Rule for foreign youth players who have spent a significant period developing in South Korea
Introduction of Domestic foreigners who has been registered with a domestic amateur team for 3consecutive years or a total of 5years before their first professional contract
Introduction of a one-off Special Player Registration Period 1-10 June 2025
Increase of number of players a club can loan in or out from 5 to 6 and the number of players that can be loaned between two clubs will be increased from 1 to 2
The number of allowed foreign players was kept strictly to six per team but could field at most five foreign players at any given time.[9]
As a military-owned team, Gimcheon Sangmu are not allowed to sign any foreign players.
North Korean player is deemed as a native player by South Korean nationality law. Starting in 2025, K League will have a homegrown system and players of foreign nationality who have grown up in Korea will be considered domestic players when registering as rookies.
Players in bold were registered during the mid-season transfer window.
First match(es) will be played: 15 February 2025. Source: SoccerwayK League Rules for classification: 1) Points; 2) Goals scored; 3) Goal difference; 4) Wins; 5) Head-to-head points Notes:
^Teams played each other three times (33 matches), before the league was split into two groups, the top six and the bottom six.
^Military-owned team Gimcheon Sangmu cannot qualify for AFC competitions.
The tenth-placed team and the eleventh-placed team will play against the play-off winners and the runners-up of the K League 2, respectively, in the relegation play-offs.