Prime Minister Malcolm Turnbull, who heads the center-right Liberal Party, has said he will likely tell Governor-General Peter Cosgrove to lock down a July 2 election date this weekend and trigger the unusually long campaign.
He and Bill Shorten, leader of the center-left Labor Party, recently outlined their conflicting economic policies on how Australia should rein in mounting debt without slowing an already sluggish economy.
Neither Turnbull nor Shorten has ever led his party into an election campaign before.
Turnbull replaced his unpopular predecessor, Tony Abbott, in a leadership ballot of lawmakers in the Liberal Party in September, only two years after the coalition government was elected.
Also Read
The government has released its budget plans for the next fiscal year, which begins on the eve of the election, calling for stimulus measures including income tax cuts for middle- and high-income earners and a gradual reduction of the company tax rate over a decade from 30 to 25 percent.
Shorten's Labor Party opposes most of the tax cuts and would spend the money saved on hospitals and schools.
Shorten said the government's budget was crafted for "Malcolm's millionaires" and offered nothing for the poor. He accuses Turnbull, a 61-year-old self-made multimillionaire, of being out of touch with ordinary folks.