| Penalties | Players | VS Club | Date | |
|---|---|---|---|---|
| 3 | Ross Byrne | Cardiff Blues | 08-09-2017 | Match details |
| 3 | Jonathan Sexton | Munster | 07-10-2017 | Match details |
| 3 | Jonathan Sexton | Connacht | 01-01-2018 | Match details |
| 2 | Ross Byrne | Gwent Dragons | 02-09-2017 | Match details |
| 2 | Ross Byrne | Ulster | 28-10-2017 | Match details |
| 2 | Ross Byrne | Munster | 26-12-2017 | Match details |
| 1 | Ross Byrne | Benetton Treviso | 02-12-2017 | Match details |
| 1 | Ciaran Frawley | Scarlets | 17-02-2018 | Match details |
| 1 | Ross Byrne | Scarlets | 09-03-2018 | Match details |
| 1 | Ross Byrne | Ospreys | 24-03-2018 | Match details |
| 1 | Joey Carbery | Ospreys | 24-03-2018 | Match details |
| 1 | Joey Carbery | Benetton Treviso | 14-04-2018 | Match details |
| 1 | Joey Carbery | Connacht | 28-04-2018 | Match details |
