When All the Pieces Fit is the tenth studio release by Peter Frampton and the follow-up to his Premonition album from 1986.

Peter Frampton - vocals, guitar, bass guitar, bass synthesizer, synthesizer, sequencer, drum programming
Nathan East - bass (tracks 2,3,5)
John Regan - bass guitar (track 8)
Chris Lord-Alge - synthesizer (tracks 2 and 8)
John Robinson - drums (tracks 1,6,8,9), Steve Ferrone - drums (tracks 3–5,7,10)
Lenny Castro - percussion (tracks 2–5,8)
Rick Wills, Jean McClain, Mark Williamson, Alfie Silas, Danny Wilde, B.A. Robertson - backing vocals
Sam Riney - tenor saxophone (track 10)