The following Speeding fines and Demerit points were valid in 2009, and published on the Western Australia Office of Road Safety website.
|Fine||Demerit Points||Km/h over the speed limit|
|$75||0||Not more than 9 km/h|
|$150||2||More than 9 km/h but not more than 19 km/h|
|$300||3||More than 19 km/h but not more than 29 km/h|
|$700||5||More than 29 km/h but not more than 40 km/h|
|$1,000||7||More than 40 km/h|
Police can impound the vehicles of drivers who exceed the speed limit by more than 45 km/h.
Double demerit points apply on all long weekends and holiday periods.