The Fair Work Commission has increased the minimum wage by 5.2 per cent.
From July 1, the lowest paid workers will earn $21.38 an hour, equating to a $40 weekly pay rise or $812.60 a week.
Fair Work Commission President Ian Ross said the rising cost of living and inflation were the main reasons behind the increase.
"We accept that the approach we have adopted will result, albeit minor, compression in relativities," he said.
"But that consideration is to be balanced against the need to provide greater relief to low-paid workers in the context of rising cost of living pressures."
Due to "exceptional circumstances" the aviation, tourism and hospitality sectors will not have to incorporate the new wage rises until October 1, however all other sectors will need to include the increase from July 1.
Women injured in serious North Dandalup crash
Daughter of man allegedly stabbed to death in East Rockingham pays tribute to father
Peel Thunder claim fourth WAFL premiership
Man dies after suspected stabbing in East Rockingham
City of Rockingham cracks down on illegal dumpers
Missing Mandurah girl found safe and well
Police hunt for man who threatened staff with knife during Falcon armed robbery
Authorities descend on Memorial Drive homeless camp, move on notices issued
Locals asked to have their say on new concept designs for Lakelands Youth Park