K League 1
- 20O
- 20W
- 20S
90% or more have a feeSome have a feeNo fee recordedS summer, W winter, O other dates
2020-21 ยท Winter window
By club
- Suwon FC4 in2 out
- Ulsan HD1 in4 out
- Seongnam FC3 in1 out
- Gwangju FC1 in2 out
- Busan IPark1 in1 out
- FC Seoul1 in1 out
- Gangwon FC2 in0 out
- Incheon United2 in0 out
- Pohang Steelers1 in1 out
- Jeonbuk Hyundai Motors0 in1 out
Sources: Wikipedia (CC BY-SA 4.0), API-Football ยท Data sources