| Penalties | Players | VS Club | Date | |
|---|---|---|---|---|
| 3 | Leigh Halfpenny | Glasgow Warriors | 07-04-2018 | Match details |
| 2 | Rhys Patchell | Zebre | 09-09-2017 | Match details |
| 2 | Leigh Halfpenny | Ulster | 15-09-2017 | Match details |
| 2 | Leigh Halfpenny | Cardiff Blues | 28-10-2017 | Match details |
| 2 | Daniel Jones | Benetton Treviso | 03-11-2017 | Match details |
| 2 | Daniel Jones | Southern Kings | 26-11-2017 | Match details |
| 2 | Daniel Jones | Cheetahs | 02-12-2017 | Match details |
| 2 | Daniel Jones | Leinster | 17-02-2018 | Match details |
| 2 | Daniel Jones | Ulster | 24-02-2018 | Match details |
| 1 | Leigh Halfpenny | Southern Kings | 02-09-2017 | Match details |
| 1 | Leigh Halfpenny | Connacht | 29-09-2017 | Match details |
| 1 | Tom Prydie | Cheetahs | 02-12-2017 | Match details |
| 1 | Daniel Jones | Leinster | 09-03-2018 | Match details |
