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NSW Property Transfer Duty: http://www.osr.nsw.gov.au/erevenue/calculators
VIC Property Transfer Duty: http://www.sro.vic.gov.au/sro/srowebsite.nsf/calculators.htm
QLD Property Transfer Duty: http://www.osr.qld.gov.au/calcs
ACT Property Transfer Duty: http://www.revenue.act.gov.au
SA Property Transfer Duty: http://www.revenuesa.sa.gov.au/calculate/calculate.html