"What You Won't Do for Love" is a song by Bobby Caldwell. It was released in September 1978. It was the lead single from Caldwell’s first album, which was named after him. It was written by Caldwell and Alfons Kettner. It was made by Ann Holloway. The song has been covered and sampled many times. One of the times was by Tupac Shakur in the 1998 song "Do for Love".