Establishing a property as a main residence (MR) by occupying it immediately after purchase will make it exempt from capital gains tax when the property is later sold as a main residence
Can I use a capital loss from residential property to off set the capital gain on shares?
Your main residence (your home) is usually exempt from capital gains tax. As a general rule, a dwelling ceases being your main residence once you stop living in it. The dwelling can continue being treated as your main residence for CGT purposes as follows:
Australian tax residents are generally entitled to a full capital gains tax (CGT) exemption for their main residence, subject to some conditions.
As soon as you move into your investment property the exposure to capital gains tax (CGT) is frozen.