It declined after the founding of the The Korean Professional Football League (K-League) in 1983, because professional clubs and famous players didn’t take part in it. There were several efforts to make professional clubs join the tournament, and it became so successful that many top-rank clubs joined in and the KFA renamed it FA Cup for the 1988 and 1989 seasons. However, it soon returned to an amateur tournament, because of discord between the KFA and professional football clubs. KFA's FA Cup separated from the National Football Championship in 1996. The two competitions merged again in 2000.
The Korean FA Cup took place after the end of the regular K-League season, and was usually completed over a short period. Games were played in a single-elimination format, with extra time and penalties if required. K-League sides were seeded in the 1st round of the tournament proper, but all matches were played at neutral venues, such as Gimcheon and Namhae.
To elevate the status of the tournament, matches were spread throughout the year. The 2006 edition, for example, started in early March, with rounds also held in April, July, August and November. The final was played in December.
As in previous years, the competition was contested in a straight knockout format.