| 31 Aug 17 | E. Schelotto Ezequiel Schelotto |  Sporting CPSCP | → |  Brighton & Hove AlbionBHA | Undisclosed |
| 31 Aug 17 | R. Towell Richard Towell | Brighton & Hove AlbionBHA | → |  Rotherham UnitedROT | Loan |
| 31 Aug 17 | T. Krul Tim Krul |  Newcastle UnitedNEW | → | Brighton & Hove AlbionBHA | Loan |
| 25 Aug 17 | R. Ince Rohan Ince | Brighton & Hove AlbionBHA | → |  BuryBURY | Loan |
| 20 Aug 17 | J. Izquierdo José Izquierdo |  Club BruggeBRUG | → | Brighton & Hove AlbionBHA | Undisclosed |
| 11 Aug 17 | K. Lua Lua Kazenga Lua Lua | Brighton & Hove AlbionBHA | → |  Queens Park RangersQPR | Loan |
| 11 Aug 17 | K. Lua Lua Kazenga Lua Lua | Brighton & Hove AlbionBHA | → | Queens Park RangersQPR | Loan |
| 10 Aug 17 | S. Ahannach Soufyan Ahannach |  Almere CityALM | → | Brighton & Hove AlbionBHA | Undisclosed |
| 07 Aug 17 | D. Propper Davy Propper |  PSV EindhovenPSV | → | Brighton & Hove AlbionBHA | Undisclosed |
| 07 Aug 17 | D. Propper Davy Propper | PSV EindhovenPSV | → | Brighton & Hove AlbionBHA | Undisclosed |
| 04 Aug 17 | T. Dallison Tom Dallison | Brighton & Hove AlbionBHA | → |  Accrington StanleyACCR | Loan |
| 04 Aug 17 | T. Hornby-Forbes Tyler Hornby-Forbes | Brighton & Hove AlbionBHA | → | Accrington StanleyACCR | Loan |
| 25 Jul 17 | O. Norwood Oliver Norwood | Brighton & Hove AlbionBHA | → |  FulhamFUL | Loan |
| 25 Jul 17 | I. Brown Isaiah Brown |  ChelseaCHE | → | Brighton & Hove AlbionBHA | Loan |
| 25 Jul 17 | O. Norwood Oliver Norwood | Brighton & Hove AlbionBHA | → | FulhamFUL | Loan |
| 20 Jul 17 | M. Normann Mathias Normann | FBXFK Bodo/GlimtFK Bodo/Glimt | → | Brighton & Hove AlbionBHA | Undisclosed |
| 13 Jul 17 | M. Suttner Markus Suttner |  FC Ingolstadt 04ING | → | Brighton & Hove AlbionBHA | Undisclosed |
| 13 Jul 17 | R. Hunt Rob Hunt | Brighton & Hove AlbionBHA | → |  Oldham AthleticOLD | Undisclosed |
| 12 Jul 17 | C. Walton Christian Walton | Brighton & Hove AlbionBHA | → |  Wigan AthleticWGA | Loan |
| 10 Jul 17 | J. Maguire-Drew Jordan Maguire-Drew | Brighton & Hove AlbionBHA | → |  Lincoln CityLCN | Loan |
| 10 Jul 17 | E. Manu Elvis Manu | Brighton & Hove AlbionBHA | → |  GenclerbirligiGEN | Free |
| 01 Jul 17 | D. Stockdale David Stockdale | Brighton & Hove AlbionBHA | → |  Birmingham CityBIR | Free |
| 01 Jul 17 | D. Stockdale David Stockdale | Brighton & Hove AlbionBHA | → | Birmingham CityBIR | Free |
| 01 Jul 17 | M. Ryan Mat Ryan |  ValenciaVAL | → | Brighton & Hove AlbionBHA | Undisclosed |
| 01 Jul 17 | P. Groß Pascal Groß | FC Ingolstadt 04ING | → | Brighton & Hove AlbionBHA | Undisclosed |
| 01 Jul 17 | M. Ryan Mat Ryan | ValenciaVAL | → | Brighton & Hove AlbionBHA | Undisclosed |
| 01 Jul 17 | P. Groß Pascal Groß | FC Ingolstadt 04ING | → | Brighton & Hove AlbionBHA | Undisclosed |
| 01 Apr 17 | C. Walton Christian Walton | Brighton & Hove AlbionBHA | → |  Southend UnitedSOUT | Loan |
| 31 Jan 17 | J. Starkey Jesse Starkey | Brighton & Hove AlbionBHA | → |  Swindon TownSWI | Undisclosed |
| 31 Jan 17 | G. Murray Glenn Murray |  AFC BournemouthBOU | → | Brighton & Hove AlbionBHA | Undisclosed |
| 31 Jan 17 | G. Murray Glenn Murray | AFC BournemouthBOU | → | Brighton & Hove AlbionBHA | Undisclosed |
| 31 Jan 17 | R. Ince Rohan Ince | Brighton & Hove AlbionBHA | → | Swindon TownSWI | Loan |
| 30 Jan 17 | C. Akpom Chuba Akpom |  ArsenalARS | → | Brighton & Hove AlbionBHA | Loan |
| 30 Jan 17 | C. Akpom Chuba Akpom | ArsenalARS | → | Brighton & Hove AlbionBHA | Loan |
| 26 Jan 17 | R. Hunt Rob Hunt | Brighton & Hove AlbionBHA | → | Oldham AthleticOLD | Loan |
| 23 Jan 17 | F. Tomori Fikayo Tomori | ChelseaCHE | → | Brighton & Hove AlbionBHA | Loan |
| 23 Jan 17 | F. Tomori Fikayo Tomori | ChelseaCHE | → | Brighton & Hove AlbionBHA | Loan |
| 14 Jan 17 | Joe Ward | Brighton & Hove AlbionBHA | → | Lincoln CityLCN | Loan |
| 10 Jan 17 | K. Lua Lua Kazenga Lua Lua | Brighton & Hove AlbionBHA | → | Queens Park RangersQPR | Loan |
| 05 Jan 17 | J. Forster-Caskey Jake Forster-Caskey | Brighton & Hove AlbionBHA | → |  Charlton AthleticCHA | Undisclosed |
| 01 Jan 17 | E. Manu Elvis Manu | Brighton & Hove AlbionBHA | → |  Go Ahead EaglesGAE | Loan |
| 01 Jan 17 | E. Manu Elvis Manu | Brighton & Hove AlbionBHA | → | Go Ahead EaglesGAE | Loan |