Hi Trasi, just been looking on the Aus Tax Office website about tax and it would appear that this years tax bill (had I been here for the whole year) would be a touch over $6,000 more just because I dont have residence status. This is a quote from the Australian tax office website, for instance $37,000 - $80,000 bracket you would pay $10,730 then 30c on every $1 over $37,000. The 30c rate is the same for residents but they pay less on the lump sum, ie only $4,650.
Info found here:
http://www.ato.gov.au/individuals/content.aspx?doc=/content/29089.htm