After Isshinkai accomplished the annexation between Korea and Japan, Kankoku Tokan-fu (South Korea Protection Agency) entirely forbade making any political association in Korea in order to suppress the political confusion in Korea, so they were compelled to dismiss as the other political associations did in exchange of 150 thousand yen given as dissolution allowance, but Song Byung-joon and others who had been leading Isshinkai assumed office as adviser of Chusuin (a government office in Korea) of Chosen Sotoku-fu (Governor-General of Korea) and kept affecting on the Korean politics after the annexation.
韓日併合の目的を達成した一進会は、その後、韓国統監府が朝鮮内の政治的混乱を収拾するために朝鮮の政治結社を全面的に禁止したため、解散費用15万円を与えられ、他の政治結社と同様に解散したが、一進会を率いた宋秉畯らは朝鮮総督府中枢院顧問となり合併後の朝鮮の政治にも大きく影響を与え続けた。