"What You Won't Do for Love" is a song by American singer-songwriter Bobby Caldwell. It was released in September 1978 as the lead single from his eponymous debut album. It was written by Caldwell and Alfons Kettner, and produced by Ann Holloway. The song has been covered and sampled numerous times, including by Tupac Shakur in the posthumous 1998 hit "Do for Love".