| Penalties | Club | VS Club | Date | |
|---|---|---|---|---|
| 7 | Sunwolves | Queensland Reds | 12-05-2018 | Match details |
| 7 | Sharks | Blues | 31-03-2018 | Match details |
| 6 | Queensland Reds | Brumbies | 02-03-2018 | Match details |
| 5 | Highlanders | Bulls | 28-04-2018 | Match details |
| 4 | New South Wales | Brumbies | 31-03-2018 | Match details |
| 4 | Melbourne Rebels | New South Wales | 29-06-2018 | Match details |
| 4 | Crusaders | Highlanders | 06-07-2018 | Match details |
| 4 | Hurricanes | Sharks | 06-04-2018 | Match details |
| 4 | Blues | New South Wales | 05-05-2018 | Match details |
| 4 | Brumbies | New South Wales | 31-03-2018 | Match details |
| 4 | Chiefs | Jaguares | 04-05-2018 | Match details |
| 3 | Western Stormers | Blues | 17-03-2018 | Match details |
| 3 | Lions | Jaguares | 21-07-2018 | Match details |
| 3 | Bulls | Lions | 03-03-2018 | Match details |
| 3 | Jaguares | Lions | 21-07-2018 | Match details |
