| 27 Nov 08 | L. Bridcutt Liam Bridcutt |  ChelseaCHE | → |  WatfordWAT | Loan |
| 27 Nov 08 | L. Bridcutt Liam Bridcutt | ChelseaCHE | → | WatfordWAT | Loan |
| 21 Nov 08 | L. Ainsworth Lionel Ainsworth | WatfordWAT | → |  Hereford UnitedHereford | Loan |
| 30 Sept 08 | M. Tyler Mark Tyler |  Peterborough UnitedPET | → | WatfordWAT | Loan |
| 30 Sept 08 | D. Ward Darren Ward |  Wolverhampton WanderersWOL | → | WatfordWAT | Loan |
| 26 Sept 08 | S. Sodje Sam Sodje |  ReadingREA | → | WatfordWAT | Loan |
| 15 Aug 08 | G. Rasiak Grzegorz Rasiak |  SouthamptonSOU | → | WatfordWAT | Loan |
| 06 Aug 08 | D. Shittu Danny Shittu | WatfordWAT | → |  Bolton WanderersBOL | Undisclosed |
| 06 Aug 08 | D. Shittu Danny Shittu | WatfordWAT | → | Bolton WanderersBOL | Undisclosed |
| 05 Aug 08 | M. Ashikodi Moses Ashikodi | WatfordWAT | → | Hereford UnitedHereford | Loan |
| 22 Jul 08 | D. Henderson Darius Henderson | WatfordWAT | → |  Sheffield UnitedSHU | 2000000 |
| 17 Jul 08 | J. Harley Jon Harley |  BurnleyBUR | → | WatfordWAT | Free |
| 11 Jul 08 | S. Kabba Steven Kabba | WatfordWAT | → |  BlackpoolBLP | Loan |
| 08 Jul 08 | T. Diagouraga Toumani Diagouraga | WatfordWAT | → | Hereford UnitedHereford | Free |
| 30 May 08 | J. Stewart Jordan Stewart | WatfordWAT | → |  Derby CountyDER | Free |
| 30 May 08 | N. Ellington Nathan Ellington | WatfordWAT | → | Derby CountyDER | Loan |
| 14 Mar 08 | J. Parkes Jordan Parkes | WatfordWAT | → |  BarnetBAR | Loan |
| 07 Mar 08 | T. Priskin Tamas Priskin | WatfordWAT | → |  Preston North EndPNE | Loan |
| 08 Feb 08 | W. Hoskins Will Hoskins | WatfordWAT | → |  Nottingham ForestFOR | Loan |
| 31 Jan 08 | J. Eustace John Eustace |  Stoke CitySTK | → | WatfordWAT | 250000 |
| 31 Jan 08 | J. Eustace John Eustace | Stoke CitySTK | → | WatfordWAT | 250000 |
| 31 Jan 08 | L. Bromby Leigh Bromby | Sheffield UnitedSHU | → | WatfordWAT | 600000 |
| 28 Jan 08 | S. Loach Scott Loach | WatfordWAT | → |  Bradford CityBRD | Loan |
| 25 Jan 08 | C. John Collins John |  FulhamFUL | → | WatfordWAT | Loan |
| 25 Jan 08 | M. King Marlon King | WatfordWAT | → |  Wigan AthleticWGA | Undisclosed |
| 25 Jan 08 | M. King Marlon King | WatfordWAT | → | Wigan AthleticWGA | Undisclosed |
| 25 Jan 08 | C. John Collins John | FulhamFUL | → | WatfordWAT | Loan |
| 24 Jan 08 | M. Sadler Mathew Sadler |  Birmingham CityBIR | → | WatfordWAT | 750000 |
| 18 Jan 08 | A. McNamee Anthony McNamee | WatfordWAT | → |  Swindon TownSWI | Undisclosed |
| 18 Jan 08 | C. Davenport Calum Davenport |  West Ham UnitedWHU | → | WatfordWAT | Loan |
| 18 Jan 08 | M. Ashikodi Moses Ashikodi | WatfordWAT | → | Swindon TownSWI | Loan |
| 18 Jan 08 | C. Davenport Calum Davenport | West Ham UnitedWHU | → | WatfordWAT | Loan |
| 17 Jan 08 | J. Parkes Jordan Parkes | WatfordWAT | → |  BrentfordBRE | Loan |
| 05 Jan 08 | L. Ainsworth Lionel Ainsworth | Hereford UnitedHereford | → | WatfordWAT | Undisclosed |
| 01 Jan 08 | G. Mahon Gavin Mahon | WatfordWAT | → |  Queens Park RangersQPR | Loan |
| 01 Jan 08 | S. Loach Scott Loach | WatfordWAT | → |  MorecambeMOR | Loan |