i think tax is calculated at 50cents to a dollar you make being a non resident...perth is the most expensive city to live in at the moment..a 1000sq ft unit would cost about 400k aud due to overwhelming occupation of asian immigrants of late..

upon starting work you should get your tax file number and mostly you will be paid on a weekly basis and your tax deducted.. you would probably have a superannuation fund being paid by your employer depending on which sector that you work in..which can be collected upon your returning to malaysia however it also depends on the class of visa that you're travelling in..you will get medicare and get free consultation from doctors but prescriptions are payable at normal rates.. which sounds like a good thing but a 300+ fee is payable or deducted from your refunds upon doing your tax returns... which means if you went to the doctor once in a financial year it would cost you 300+ but if you went to the doctor for 300 times in a year, it will still cost you 300+ (you make up your mind whether it sounds good or not)

a second cook in a malaysian restaurant would probably make about 800 aud per week tax free (depending on negotiations with employer eg sometimes employer pay their taxes to avoid paying other funds) and would live quite comfortably... to have a char kueh tiew for lunch would cost you almost rm20 over there but to have a 3kg King Crab would only cost you 180 aud (in Malaysia the crab is going for the rate of rm30 per 100 grams) which translates to cheap food expensive and expensive food cheap..

while being there i would suggest you try all the western cuisines available and not think of malaysian food too much cos the western food there is mmmmmmmmm.......... also visit all the places that you wanna visit otherwise you will regret it just like i did...i stayed in melbourne for five years and only visited perth for a week and found it to be boring...but that is just me.. the opera house in sydney is a must and so are the beaches during summer.. and the raves if you are into electronic music and also all the live acts and concerts which we rarely get to see them perform in malaysia..and the alpines..ohh i think perth is not cold enough.. but in melbourne there is...check it out..

whether you will have money to bring home really depends on your level of comfort and spending...so there you go.. good luck mate..