6-year rule

The six-year rule lets you treat a former main residence as your PPOR for up to six years after you move out, even while you're renting it out, so you keep the CGT main residence exemption when you sell. The clock resets every time you move back in and reoccupy the property as your home. You can't have another property as your PPOR during the same period, so you essentially choose which one to apply the exemption to. It's heavily used by Australians moving overseas for work and by rentvestors who lived in their first purchase before turning it into an investment. The election is made on the tax return for the year you sell, not when you move out.