The Commonwealth Electoral Act 1918 (Electoral Act) requires that a redistribution process should be undertaken when:
- the number of members of the House of Representatives to which a state or territory is entitled has changed
- the number of electors in more than one-third of the electoral divisions in a state (or one of the electoral divisions in the Australian Capital Territory or the Northern Territory) deviates from the average divisional enrolment by over ten per cent for a period of more than two months
- a period of seven years has elapsed since the last redistribution process was determined.
Indicative timing
Unless a redistribution is required to start earlier or is deferred, the next redistribution will be due to commence within 30 days after seven years have elapsed since the most recent redistribution was determined.
| State/territory | Most recent determination of a redistribution was on … | A redistribution would be required to commence within 30 days of … |
|---|---|---|
| Tasmania | 14 November 2017 | 8 October 2033. A redistribution commenced on 12 August 2025, with a determination date of 8 October 2026. |
| Queensland | 27 March 2018 | The redistribution has been deferred and will be directed to commence following the Electoral Commissioner’s determination of the number of members of the House of Representatives for each state and territory. This determination is scheduled to be made on or after Thursday 23 July 2026. |
| Australian Capital Territory | 13 July 2018 | 8 October 2033. A redistribution commenced on 12 August 2025, with a determination date of 8 October 2026. |
| South Australia | 20 July 2018 | 8 October 2033. A redistribution commenced on 12 August 2025, with a determination date of 8 October 2026. |
| Western Australia | 24 September 2024 | 24 September 2031 |
| New South Wales | 10 October 2024 | 10 October 2031 |
| Victoria | 17 October 2024 | 17 October 2031 |
| Northern Territory | 4 March 2025 | 4 March 2032 |
Updated: 12 August 2025