PPR exemption calculator

ATO's website has an excellent calculator for dertermining whether a property qualifies for the Primary Place of Residence (PPR) exemption and the % subject to capital gain tax:

Shortcut


long way:
http://www.ato.gov.au/ - For individuals --> More: capital gains tax -->Basic :Real Estate (including your home) : Property Exemption Tool

or:

http://www.ato.gov.au/ - For individuals --> More: capital gains tax -->Basic :Real Estate (including your home) : Selling your home -->Treating a dwelling as your main residence after you move out--> scroll to the bottom and click on Capital gains tax property exemption calculator

Other Readings:

Is the dwelling your main residence?