Why do we have federal elections every three years?

Graphic of a blue rectangle being dropped into a larger blue box. This is repeated multiple times.

Ballot box graphic

Parliamentary Education Office (peo.gov.au)

Ballot box graphic

Graphic of a blue rectangle being dropped into a larger blue box. This is repeated multiple times.

Parliamentary Education Office (peo.gov.au)

Description

This graphic is a representation of a ballot papers being placed into a ballot boxes.

Great question! The answer is because it is a rule in the Australian Constitution.

Section 28 of the Australian Constitution says that each House of Representatives formed after a federal election will continue for 3 years from the date of the first meeting, but not any longer.  An election can be earlier than 3 years if requested by the Prime Minister and approved by the Governor-General.