| september 7 2019 |  D. von Ahlen |  Watford City | None | Player is fired |
| august 22 2019 | S. Plumley | Watford City | None | RSD1 005 618 |
| august 21 2019 |  B. Dierman | Steve's Voetbal Club | Watford City | RSD3 225 038 |
| june 7 2019 | F. Haller | Watford City | None | RSD1 181 694 |
| june 7 2019 | O. von Schroeder | Watford City | None | RSD1 815 888 |
| february 23 2019 |  C. Hollowood | Watford City | None | RSD1 478 428 |
| december 4 2018 |  F. Utizkikh | Brighton United #2 | Watford City | RSD2 290 500 |
| october 18 2018 |  M. Oliveira |  大秦帝国 | Watford City (On loan) | (RSD172 303) |
| october 14 2018 | S. Carder | Watford City | None | RSD198 929 |
| july 31 2018 | G. Easton | Watford City | None | RSD300 989 |
| july 4 2018 | G. Moyers | Watford City | None | RSD531 504 |
| july 2 2018 | O. Cannaday | Watford City | None | RSD421 669 |
| august 28 2017 | T. Ryall | Watford City |  Falkirk #2 | RSD202 995 |
| august 25 2017 |  F. Vertelis | Watford City |  FC Pontypool | RSD456 000 |
| august 24 2017 | F. Haller | Watford City | Chipping Sodbury (On loan) | (RSD135 038) |
| august 24 2017 | F. Coltman | Watford City |  FC Gnjilane #3 (On loan) | (RSD270 596) |
| august 23 2017 |  J. Švābe |  FC Dalal-Abad | Watford City | RSD23 409 000 |
| august 3 2017 |  K. Kital | Watford City |  Atletico San Fernando de Henares #3 | RSD2 950 313 |
| august 2 2017 | O. von Schroeder |  FC Tammelan Ryske | Watford City | RSD20 517 071 |
| may 16 2017 | F. Haller | Watford City | Newton Mearns #3 (On loan) | (RSD67 218) |
| may 16 2017 | G. Cram | Watford City | Guildford United #2 | RSD2 295 027 |
| may 13 2017 |  E. Cardovan | Burton upon Trent City | Watford City | RSD7 980 000 |
| may 13 2017 | C. Cannel | Watford City | Ipswich Town #3 (On loan) | (RSD34 595) |
| may 13 2017 | D. Hollier | Watford City | Falkirk | RSD3 057 459 |
| may 11 2017 |  A. Kuralov |  MPL Queens Park Rangers | Watford City | RSD13 418 001 |
