Bonner SC (DFB Pokal): every transfer in and out, fees paid and earned, and the market value of the squad.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-09-01 | Player | Bonner SC | SSV Merten | Free |
| 2026-07-08 | Tobias Knost | SC Verl | Bonner SC | Free |
| 2026-07-01 | Player | Fortuna Düsseldorf II | Bonner SC | Free |
| 2026-07-01 | Player | Sportfreunde Lotte | Bonner SC | Free |
| 2026-07-01 | Luca de Meester | Sandhausen | Bonner SC | Free |
| 2026-07-01 | Player | Fortuna Köln | Bonner SC | Free |
| 2026-07-01 | Frederic Baum | Homburg | Bonner SC | Free |
| 2026-07-01 | Player | Bonner SC | Bonn-Endenich | Free |
| 2026-07-01 | Player | Bonner SC | Kickers Emden | Free |
| 2026-07-01 | Lucas Cueto | Bonner SC | Sportfreunde Siegen | Free |
| 2026-07-01 | Elias Kratzer | Bonner SC | Chemie Leipzig | Free |
| 2026-07-01 | Player | Bonner SC | Fortuna Düsseldorf II | Free |
| 2026-01-13 | Player | FC Bocholt | Bonner SC | Free |
| 2025-08-30 | Elias Bördner | Alemannia Aachen | Bonner SC | Free |
| 2025-08-15 | Lucas Cueto | Viktoria Köln | Bonner SC | Free |
| 2025-07-01 | Player | FSV Frankfurt | Bonner SC | Free |
| 2025-07-01 | Player | Bonner SC | FC Wegberg-Beeck | Free |
| 2025-07-01 | Player | Bonner SC | SSV Merten | Free |
| 2024-09-02 | Player | Alemannia Aachen | Bonner SC | Free |
| 2024-08-20 | Player | Düren Merzenich | Bonner SC | Free |