| 31 Aug 18 | Richie Towell |  Brighton & Hove AlbionBHA | → |  Rotherham UnitedROT | Loan |
| 31 Aug 18 | Richie Towell | Brighton & Hove AlbionBHA | → | Rotherham UnitedROT | Loan |
| 23 Aug 18 | T. Hemed Tomer Hemed | Brighton & Hove AlbionBHA | → |  Queens Park RangersQPR | Loan |
| 23 Aug 18 | T. Hemed Tomer Hemed | Brighton & Hove AlbionBHA | → | Queens Park RangersQPR | Loan |
| 15 Aug 18 | P. Tau Percy Tau | Brighton & Hove AlbionBHA | → | USXUnion SGUnion SG | Loan |
| 13 Aug 18 | O. Norwood Oliver Norwood | Brighton & Hove AlbionBHA | → |  Sheffield UnitedSHU | Loan |
| 13 Aug 18 | O. Norwood Oliver Norwood | Brighton & Hove AlbionBHA | → | Sheffield UnitedSHU | Loan |
| 09 Aug 18 | D. Burn Dan Burn | Brighton & Hove AlbionBHA | → |  Wigan AthleticWGA | Loan |
| 09 Aug 18 | Peter Gwargis | JSIJonkopings Sodra IFJonkopings Sodra IF | → | Brighton & Hove AlbionBHA | Undisclosed |
| 09 Aug 18 | D. Burn Dan Burn | Wigan AthleticWGA | → | Brighton & Hove AlbionBHA | Undisclosed |
| 09 Aug 18 | D. Burn Dan Burn | Brighton & Hove AlbionBHA | → | Wigan AthleticWGA | Loan |
| 09 Aug 18 | D. Burn Dan Burn | Wigan AthleticWGA | → | Brighton & Hove AlbionBHA | Undisclosed |
| 09 Aug 18 | M. Montoya Martín Montoya |  ValenciaVAL | → | Brighton & Hove AlbionBHA | Undisclosed |
| 09 Aug 18 | M. Montoya Martín Montoya | ValenciaVAL | → | Brighton & Hove AlbionBHA | Undisclosed |
| 07 Aug 18 | B. Arce Billy Arce |  Independiente del ValleIDV | → | Brighton & Hove AlbionBHA | Undisclosed |
| 07 Aug 18 | A. Dreyer Anders Dreyer | EXXEsbjergEsbjerg | → | Brighton & Hove AlbionBHA | Undisclosed |
| 07 Aug 18 | B. Arce Billy Arce | Brighton & Hove AlbionBHA | → |  Extremadura UDEUD | Loan |
| 02 Aug 18 | J. Skalak Jiri Skalak | Brighton & Hove AlbionBHA | → |  MillwallMIL | Undisclosed |
| 02 Aug 18 | J. Skalak Jiri Skalak | Brighton & Hove AlbionBHA | → | MillwallMIL | Undisclosed |
| 30 Jul 18 | S. Baldock Sam Baldock | Brighton & Hove AlbionBHA | → |  ReadingREA | Undisclosed |
| 30 Jul 18 | S. Baldock Sam Baldock | Brighton & Hove AlbionBHA | → | ReadingREA | Undisclosed |
| 25 Jul 18 | A. Jahanbakhsh Alireza Jahanbakhsh |  AZ AlkmaarAZ | → | Brighton & Hove AlbionBHA | Undisclosed |
| 25 Jul 18 | A. Jahanbakhsh Alireza Jahanbakhsh | AZ AlkmaarAZ | → | Brighton & Hove AlbionBHA | Undisclosed |
| 24 Jul 18 | T. Krul Tim Krul | Brighton & Hove AlbionBHA | → |  Norwich CityNOR | Free |
| 24 Jul 18 | T. Krul Tim Krul | Brighton & Hove AlbionBHA | → | Norwich CityNOR | Free |
| 20 Jul 18 | P. Tau Percy Tau |  Mamelodi SundownsMSFC | → | Brighton & Hove AlbionBHA | Undisclosed |
| 17 Jul 18 | Y. Bissouma Yves Bissouma |  LilleLILL | → | Brighton & Hove AlbionBHA | Undisclosed |
| 17 Jul 18 | Y. Bissouma Yves Bissouma | LilleLILL | → | Brighton & Hove AlbionBHA | Undisclosed |
| 16 Jul 18 | D. Button David Button |  FulhamFUL | → | Brighton & Hove AlbionBHA | Undisclosed |
| 12 Jul 18 | Robert Sanchez | Brighton & Hove AlbionBHA | → |  Forest Green RoversFGR | Loan |
| 05 Jul 18 | Bernardo |  RB LeipzigRBL | → | Brighton & Hove AlbionBHA | Undisclosed |
| 05 Jul 18 | Bernardo | RB LeipzigRBL | → | Brighton & Hove AlbionBHA | Undisclosed |
| 02 Jul 18 | S. Alzate Steven Alzate | Brighton & Hove AlbionBHA | → |  Swindon TownSWI | Loan |
| 01 Jul 18 | L. Balogun Leon Balogun |  MainzMAIN | → | Brighton & Hove AlbionBHA | Free |
| 01 Jul 18 | J. Murphy Jamie Murphy | Brighton & Hove AlbionBHA | → |  RangersRAN | Undisclosed |
| 01 Jul 18 | C. Walton Christian Walton | Brighton & Hove AlbionBHA | → | Wigan AthleticWGA | Loan |
| 01 Jul 18 | L. Balogun Leon Balogun | MainzMAIN | → | Brighton & Hove AlbionBHA | Free |
| 01 Jul 18 | B. Halloran Ben Halloran | Brighton & Hove AlbionBHA | → |  Notts CountyNOTT | Loan |
| 01 Jul 18 | Robert Sanchez | Brighton & Hove AlbionBHA | → | Forest Green RoversFGR | Loan |
| 01 Jul 18 | J. Murphy Jamie Murphy | Brighton & Hove AlbionBHA | → | RangersRAN | Undisclosed |
| 01 Jul 18 | C. Walton Christian Walton | Brighton & Hove AlbionBHA | → | Wigan AthleticWGA | Loan |
| 21 Jun 18 | J. Steele Jason Steele |  SunderlandSUN | → | Brighton & Hove AlbionBHA | Undisclosed |
| 13 Jun 18 | C. Goldson Connor Goldson | Brighton & Hove AlbionBHA | → | RangersRAN | Undisclosed |
| 13 Jun 18 | C. Goldson Connor Goldson | Brighton & Hove AlbionBHA | → | RangersRAN | Undisclosed |
| 08 Jun 18 | F. Andone Florin Andone |  Deportivo La CoruñaDEP | → | Brighton & Hove AlbionBHA | Undisclosed |
| 08 Jun 18 | F. Andone Florin Andone | Deportivo La CoruñaDEP | → | Brighton & Hove AlbionBHA | Undisclosed |
| 08 Jun 18 | J. Murphy Jamie Murphy | Brighton & Hove AlbionBHA | → | RangersRAN | Undisclosed |
| 08 Jun 18 | J. Murphy Jamie Murphy | Brighton & Hove AlbionBHA | → | RangersRAN | Undisclosed |
| 25 May 18 | B. Vose Bailey Vose | Brighton & Hove AlbionBHA | → |  Colchester UnitedCOL | Undisclosed |
| 31 Jan 18 | Ben Hall | Brighton & Hove AlbionBHA | → | Notts CountyNOTT | Loan |
| 29 Jan 18 | L. Ulloa Leonardo Ulloa |  Leicester CityLEI | → | Brighton & Hove AlbionBHA | Loan |
| 25 Jan 18 | K. Lua Lua Kazenga Lua Lua | Brighton & Hove AlbionBHA | → | SunderlandSUN | Free |
| 25 Jan 18 | K. Lua Lua Kazenga Lua Lua | Brighton & Hove AlbionBHA | → | SunderlandSUN | Free |
| 19 Jan 18 | J. Locadia Jürgen Locadia |  PSV EindhovenPSV | → | Brighton & Hove AlbionBHA | Undisclosed |
| 19 Jan 18 | J. Locadia Jürgen Locadia | PSV EindhovenPSV | → | Brighton & Hove AlbionBHA | Undisclosed |
| 07 Jan 18 | J. Murphy Jamie Murphy | Brighton & Hove AlbionBHA | → | RangersRAN | Loan |
| 07 Jan 18 | J. Murphy Jamie Murphy | Brighton & Hove AlbionBHA | → | RangersRAN | Loan |
| 03 Jan 18 | J. Maguire-Drew Jordan Maguire-Drew | Brighton & Hove AlbionBHA | → |  Coventry CityCOV | Loan |
| 01 Jan 18 | T. Krul Tim Krul |  Newcastle UnitedNEW | → | Brighton & Hove AlbionBHA | Free |
| 01 Jan 18 | V. Gyökeres Viktor Gyökeres | IBXIF BrommapojkarnaIF Brommapojkarna | → | Brighton & Hove AlbionBHA | Undisclosed |