What happens if Australia has a double dissolution election?
A double dissolution is a constitutional mechanism that dissolves both houses of Parliament simultaneously, allowing an election for all Senate seats at once — a tool used when the Senate repeatedly blocks government legislation.
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- Scenario explainer
- Last Updated
- April 15, 2026
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- 2 linked
Scenario pages are procedural explainers linked back to relevant institutions, offices, and countries.
They are meant to explain formal political processes, not speculate on current events.
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Step-by-Step Process
This explainer walks through the 4 steps involved in this process, from start to finish.
Step 1
The Senate blocks legislation twice
A double dissolution can only be triggered if the Senate has failed to pass a bill that the House of Representatives has passed, and the Senate again fails to pass it (or passes it with unacceptable amendments) after three months. The bill becomes the "trigger" for the election.
Step 2
The Governor-General dissolves both houses
The prime minister advises the Governor-General to dissolve both chambers simultaneously. This is constitutionally possible only within specified periods and requires the trigger bills. The Governor-General must be satisfied the constitutional requirements are met before granting dissolution.