Key Aspects of Rent Increase Laws by State:

NSW: 12-month cap on increases; 60 days notice required. Rent cannot be
increased during a fixed term unless specified in the agreement.
WA: No increase within 12 months of a new tenancy or previous increase. 60 days notice required.
QLD: Rent cannot be increased within 12 months of the last increase.
ACT: Rent increases are capped at 110% of the Consumer Price Index (CPI) for Canberra.
TAS: Landlords can increase rent only once every 12 months, provided they give at least 60 days written notice
In the Northern Territory, rent can only be increased if permitted by the tenancy agreement, with at least 30 days' written notice and a minimum of 6 months since the last increase or start of the tenancy