The 2025 K League 1, also known as the Hana Bank K League 1 for sponsorship reasons, is the ongoing 43rd season of the top division of professional football in South Korea, and the twelfth season of the K League 1. Ulsan HD are the three-time defending champions.[1]
The following rules were newly introduced for the 2025 season.[citation needed]
Concussion substitution rule
Homegrown foreign player rule for players of foreign nationality who have spent a significant period of their youth career in South Korea
Domestic foreign player rule for players of foreign nationality who have been registered with a domestic amateur team for at least three consecutive years or a total of five years before their first professional contract
Introduction of a one-off Special Player Registration Period 1–10 June 2025
Increase in the number of players a club can loan in or out (from five to six), and in the number of players that can be loaned between two clubs (from one to two)
FC Anyang were promoted from the K League 2 for the first time in the club's history.[2]Incheon United were relegated to the K League 2, absenting from the top flight of South Korean football for the first time in the club's history.[3]
Each team may have up to six foreign players registered, but may only field up to five at any given time.[10] As a military-owned team, Gimcheon Sangmu are not allowed to sign any foreign players.
A North Korean player is considered to be a domestic player under South Korean nationality law. As of 2025, K League has a homegrown system under which players of foreign nationality who have grown up in Korea are considered to be domestic players when registering as new players.
Players in bold were registered during the mid-season transfer window.
Updated to match(es) played on 1 June 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.
Updated to match(es) played on 1 June 2025. Source: K League Notes:
Matchday 4 (8–9 March): The match between Gwangju FC and Pohang Steelers was postponed to 22 March due to Gwangju FC's schedule for the 2024–25 AFC Champions League Elite.
Matchday 10 (26–27 April): The match between Gwangju FC and Daegu FC was held in advance on 9 April due to Gwangju FC's schedule for the 2024–25 AFC Champions League Elite.
Matchday 18 (13–14 June): The match between Ulsan HD and Daejeon Hana Citizen was held in advance on 1 April due to Ulsan HD's schedule for the 2025 FIFA Club World Cup.
Matchday 19 (17–18 June): The match between FC Anyang and Ulsan HD was held in advance on 23 April due to Ulsan HD's schedule for the 2025 FIFA Club World Cup.
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.