The 2018 CAMS Australian Formula 4 Championship (initially known for sponsorship purposes as the CAMS Jayco Australian Formula 4 Championship and later as the CAMS Payce Australian Formula 4 Championship) was the fourth Australian Formula 4 Championship, a motor racing competition for open-wheel racing cars complying with Formula 4 regulations, which were created by the Fédération Internationale de l'Automobile (FIA) for entry-level open-wheel championships. Teams and drivers competed in twenty-one races at six venues, starting on 7 April and ending on 4 November.