The move is set to cost the government billions of dollars but Treasurer Chris Bowen said cuts would be made elsewhere to compensate with the Labor Party sticking to its plan to return the budget to surplus in 2015-2016.
Bowen confirmed media reports that the fixed Australian dollar 24.15 (USD 21.90) per tonne carbon tax would be dumped in favour of a floating price of between Australian dollar 6 and Australian dollar 10 per tonne from July 1, 2014, to ease cost of living pressures for families and help support the non-mining sectors of the economy.
"There is a substantial impact on the budget of doing this, of course there is, and it is several billion dollars, but we will be financing that in a fiscally responsible way," Bowen told the Ten Network, adding that full details would be announced over coming days.
"It means ensuring that our strategy of returning to surplus over the economic cycle is adhered to, so it is a challenge."
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He added: "I think families will see a big benefit in what we are bringing forward".
The government has always said it would move to an emissions trading scheme after three years with a floating price set by the market, but new Prime Minister Kevin Rudd has now moved that forward a year.
The issue of a carbon tax has been hotly debated in Australia.
Former Labor prime minister Julia Gillard's popularity sunk after she announced plans for the carbon tax in early 2011 -- after pledging before her 2010 election that it would not be introduced by a government she led.