;CD-single/Digital Download (Dutch release) (Released: October 16, 2009) (White Villa) • "I Need You Now" [UK Radio Edit] — 3:07 • "I Need You Now" [Extended Mix] — 4:34 • "I Need You Now" [UK Album Edit] — 3:00 • "I Need You Now" [Cahill Club Mix] — 6:20 • "I Need You Now" [Music Video] — 3:00 ;Digital Download (UK release) (Released: November 15, 2009) (AATW) • "I Need You Now" [UK Radio Edit) — 3:07 • "I Need You Now" [Extended Mix] — 4:35 • "I Need You Now" [Cahill Radio Edit] — 3:13 • "I Need You Now" [Cahill Club Mix] — 6.20 • "I Need You Now" [Grant Nelson Mix] — 7:30 • "I Need You Now" [Ali Payami Mix] — 5:54 • "I Need You Now" [UK Edit] — 3:00 ;CD-single (UK release) (Released: November 16, 2009) (AATW) • "I Need You Now" [UK Radio Edit] — 3:07 • "I Need You Now" [Cahill Radio Edit] — 3:13 ;12" Maxi-single (UK release) (Released: November 26, 2009) (AATW) • "I Need You Now" [Grant Nelson Mix] — 8:00 • "I Need You Now" [Grant Nelson Dub Mix] — 7:30 • "I Need You Now" [Cahill Mix] — 6:00 • "I Need You Now" [Ali Payami Mix] — 6:00 ;Digital Download (Scandinavian release) (Released: November 23, 2009) (Roxy) • "I Need You Now" [Radio Edit] — 3:45 ;Digital Download (Australian release) (Released: December 25, 2009) (Warner) • "I Need You Now" [Cahill Radio Edit] — 3:15 ;Digital Download - The Remixes (Australian release) (Released: February 12, 2010) (Warner) • "I Need You Now" [Cahill Extended Mix] — 6.20 • "I Need You Now" [Ali Payami Mix] — 5:54 • "I Need You Now" [Ali Payami 909 Mix] — • "I Need You Now" [Alex K Mix] — • "I Need You Now" [Grant Nelson Mix] — 8:00 • "I Need You Now" (
Jens Kindervater Mix) — 5:19 • "I Need You Now" [Album Version] — 3:07 • "I Need You Now" [Extended Mix] — 4:35 ;CD-single (Italian release) (Released: 2010) (Planet) • "I Need You Now" [UK Radio Edit] — 3:07 • "I Need You Now" [Extended Mix] — 4:35 • "I Need You Now" [Grant Nelson Mix] — 8:00 • "I Need You Now" [Cahill Club Mix] — 6.20 • "I Need You Now" [Ali Payami Mix] — 5:54 • "I Need You Now" [Jens Kindervater Mix] — 5:19 • "On and On" [Radio Edit] — 3:51 • "On and On" [Extended Version] — 5:47 • "On and On" [Alex Colle Radio Edit Remix] — • "On and On" [Alex Colle Remix] — ;Digital Download (Belgian release){{cite web (Released: April 19, 2010) (BIP) • "I Need You Now" [Radio Edit] — 3:47 • "I Need You Now" [Nilz Van Zandt Radio Edit] — 3:44 • "I Need You Now" [Robert Abigail Radio Edit] — 3:34 • "I Need You Now" [Deve, Amp & Matizz Radio Edit] — 3:35 • "I Need You Now" [Denys Victoriano Radio Edit] — 3:52 • "I Need You Now" [Extended Mix] — 4:35 • "I Need You Now" [Nilz Van Zandt Extended Mix] — 4:28 • "I Need You Now" [Robert Abigail Extended Mix] — 6:03 • "I Need You Now" [Deve, Amp & Matizz Extended Mix] — 5:53 • "I Need You Now" [Denys Victoriano Extended Mix] — 6:34 ;Digital Download - The Definitive Remixes Collection (Italian release) (Released: May 7, 2010) (Planet) • "I Need You Now" [Cahill Radio Edit] — 3:15 • "I Need You Now" [UK Mix] — 3:48 • "I Need You Now" [Cahill Extended Mix] — 6:22 • "I Need You Now" [Grant Nelson Mix] — 7:32 • "I Need You Now" [Grant Nelson Radio Edit] — 2:57 • "I Need You Now" [Grant Nelson Dub Mix] — 7:16 • "I Need You Now" [Alex K Mix] — 6:42 • "I Need You Now" [Ali Payami 909 Mix — 6:19 • "I Need You Now" [Ali Payami Mix] — 5:56 • "I Need You Now" [Jens Kindervater Mix] — 5:19 • "I Need You Now" [Jens Kindervater Radio Edit] — 3:40 • "I Need You Now" [Radio Edit] — 3:45 ;12" Vinyl (Italian release) (Released: May 7, 2010) (Planet)
Side 1 • "I Need You Now" [Grant Nelson Mix] — 8:00 • "I Need You Now" [Cahill Club Mix] — 6.20
Side 2 • "On & On" [Alex Colle Remix] — • "I Need You Now" [Ali Payami 909 Mix] — 6:19 ==Release history==