| 22 Nov 12 | P. Bamford Patrick Bamford |  ChelseaCHE | → |  Milton Keynes DonsMKD | Loan |
| 22 Nov 12 | T. Kane Todd Kane | ChelseaCHE | → |  Preston North EndPNE | Loan |
| 22 Nov 12 | C. Clifford Conor Clifford | ChelseaCHE | → |  Crawley TownCRA | Loan |
| 01 Oct 12 | James Ashton | ChelseaCHE | → |  Yeovil TownYEO | Loan |
| 03 Sept 12 | R. Meireles Raul Meireles | ChelseaCHE | → |  FenerbahceFEN | Undisclosed |
| 31 Aug 12 | Amin Affane | ChelseaCHE | → |  Roda JC KerkradeRJC | Loan |
| 31 Aug 12 | Y. Benayoun Yossi Benayoun | ChelseaCHE | → |  West Ham UnitedWHU | Loan |
| 31 Aug 12 | M. Essien Michael Essien | ChelseaCHE | → |  Real MadridMAD | Loan |
| 31 Aug 12 | Amin Affane | ChelseaCHE | → | Roda JC KerkradeRJC | Loan |
| 31 Aug 12 | G. Kakuta Gaël Kakuta | ChelseaCHE | → |  VitesseVIT | Loan |
| 31 Aug 12 | M. Essien Michael Essien | ChelseaCHE | → | Real MadridMAD | Loan |
| 31 Aug 12 | N. Chalobah Nathaniel Chalobah | ChelseaCHE | → |  WatfordWAT | Loan |
| 31 Aug 12 | G. Kakuta Gaël Kakuta | ChelseaCHE | → | VitesseVIT | Loan |
| 31 Aug 12 | T. Hazard Thorgan Hazard | ChelseaCHE | → |  Zulte-WaregemZUL | Loan |
| 31 Aug 12 | N. Chalobah Nathaniel Chalobah | ChelseaCHE | → | WatfordWAT | Loan |
| 24 Aug 12 | V. Moses Victor Moses |  Wigan AthleticWGA | → | ChelseaCHE | Undisclosed |
| 24 Aug 12 | C. Azpilicueta César Azpilicueta |  MarseilleMAR | → | ChelseaCHE | Undisclosed |
| 24 Aug 12 | C. Azpilicueta César Azpilicueta | MarseilleMAR | → | ChelseaCHE | Undisclosed |
| 23 Aug 12 | Archange Nkumu | ChelseaCHE | → | Yeovil TownYEO | Loan |
| 20 Aug 12 | J. McEachran Josh McEachran | ChelseaCHE | → |  MiddlesbroughMID | Loan |
| 20 Aug 12 | J. McEachran Josh McEachran | ChelseaCHE | → | MiddlesbroughMID | Loan |
| 18 Aug 12 | C. Clifford Conor Clifford | ChelseaCHE | → |  PortsmouthPOR | Loan |
| 16 Aug 12 | S. Hutchinson Sam Hutchinson | ChelseaCHE | → |  Nottingham ForestFOR | Loan |
| 16 Aug 12 | S. Hutchinson Sam Hutchinson | ChelseaCHE | → | Nottingham ForestFOR | Loan |
| 14 Aug 12 | S. Walker Sam Walker | ChelseaCHE | → |  Bristol RoversBRI | Loan |
| 10 Aug 12 | B. Gordon Ben Gordon | ChelseaCHE | → |  Birmingham CityBIR | Loan |
| 10 Aug 12 | B. Gordon Ben Gordon | ChelseaCHE | → | Birmingham CityBIR | Loan |
| 10 Aug 12 | R. Lukaku Romelu Lukaku | ChelseaCHE | → |  West Bromwich AlbionWBA | Loan |
| 02 Aug 12 | K. De Bruyne Kevin De Bruyne | ChelseaCHE | → |  Werder BremenWER | Loan |
| 02 Aug 12 | K. De Bruyne Kevin De Bruyne | ChelseaCHE | → | Werder BremenWER | Loan |
| 25 Jul 12 | Oscar |  InternacionalINT | → | ChelseaCHE | Undisclosed |
| 25 Jul 12 | Oscar | InternacionalINT | → | ChelseaCHE | Undisclosed |
| 24 Jul 12 | T. Hazard Thorgan Hazard |  LensRCL | → | ChelseaCHE | Undisclosed |
| 13 Jul 12 | Rohan Ince | ChelseaCHE | → | Yeovil TownYEO | Loan |
| 11 Jul 12 | P. van Aanholt Patrick van Aanholt | ChelseaCHE | → | VitesseVIT | Loan |
| 11 Jul 12 | P. van Aanholt Patrick van Aanholt | ChelseaCHE | → | VitesseVIT | Loan |
| 11 Jul 12 | T. Kalas Tomás Kalas | ChelseaCHE | → | VitesseVIT | Loan |
| 11 Jul 12 | T. Kalas Tomás Kalas | ChelseaCHE | → | VitesseVIT | Loan |
| 07 Jul 12 | S. Kalou Salomon Kalou | ChelseaCHE | → |  LilleLILL | Free |
| 07 Jul 12 | S. Kalou Salomon Kalou | ChelseaCHE | → | LilleLILL | Free |
| 01 Jul 12 | M. Marin Marko Marin | Werder BremenWER | → | ChelseaCHE | Undisclosed |
| 01 Jul 12 | D. Drogba Didier Drogba | ChelseaCHE | → | SSXShanghai ShenhuaShanghai Shenhua | Free |
| 01 Jul 12 | M. Marin Marko Marin | Werder BremenWER | → | ChelseaCHE | Undisclosed |
| 01 Jul 12 | E. Hazard Eden Hazard | LilleLILL | → | ChelseaCHE | Undisclosed |
| 01 Jul 12 | E. Hazard Eden Hazard | LilleLILL | → | ChelseaCHE | Undisclosed |
| 19 Jun 12 | J. Mellis Jacob Mellis | ChelseaCHE | → |  BarnsleyBAR | Free |
| 19 Jun 12 | J. Mellis Jacob Mellis | ChelseaCHE | → | BarnsleyBAR | Free |
| 31 Jan 12 | P. Bamford Patrick Bamford | Nottingham ForestFOR | → | ChelseaCHE | Undisclosed |
| 31 Jan 12 | K. De Bruyne Kevin De Bruyne | ChelseaCHE | → |  Racing GenkGENK | Loan |
| 31 Jan 12 | Philipp Prosenik | ChelseaCHE | → |  AC MilanMIL | Undisclosed |
| 31 Jan 12 | K. De Bruyne Kevin De Bruyne | Racing GenkGENK | → | ChelseaCHE | Undisclosed |
| 31 Jan 12 | P. Bamford Patrick Bamford | Nottingham ForestFOR | → | ChelseaCHE | Undisclosed |
| 31 Jan 12 | Philipp Prosenik | ChelseaCHE | → | AC MilanMIL | Undisclosed |
| 27 Jan 12 | Alex | ChelseaCHE | → |  Paris Saint-Germain PSG | Undisclosed |
| 27 Jan 12 | Alex | ChelseaCHE | → | Paris Saint-Germain PSG | Undisclosed |
| 19 Jan 12 | S. Walker Sam Walker | ChelseaCHE | → | Yeovil TownYEO | Loan |
| 17 Jan 12 | P. van Aanholt Patrick van Aanholt | ChelseaCHE | → | VitesseVIT | Loan |
| 17 Jan 12 | J. McEachran Josh McEachran | ChelseaCHE | → |  Swansea CitySWA | Loan |
| 17 Jan 12 | P. van Aanholt Patrick van Aanholt | ChelseaCHE | → | VitesseVIT | Loan |
| 16 Jan 12 | G. Cahill Gary Cahill |  Bolton WanderersBOL | → | ChelseaCHE | Undisclosed |
| 13 Jan 12 | B. Gordon Ben Gordon | ChelseaCHE | → |  KilmarnockKIL | Loan |
| 13 Jan 12 | B. Gordon Ben Gordon | ChelseaCHE | → | KilmarnockKIL | Loan |
| 11 Jan 12 | G. Kakuta Gaël Kakuta | ChelseaCHE | → |  Dijon FCODIJO | Loan |
| 11 Jan 12 | G. Kakuta Gaël Kakuta | ChelseaCHE | → | Dijon FCODIJO | Loan |
| 02 Jan 12 | R. Taylor Rhys Taylor | ChelseaCHE | → |  Rotherham UnitedROT | Loan |
| 01 Jan 12 | N. Anelka Nicolas Anelka | ChelseaCHE | → | SSXShanghai ShenhuaShanghai Shenhua | Undisclosed |