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JULIA Gillard’s proposed carbon tax would cost households $16.60 a week, Treasury modelling shows.

The figure is based on the Government’s previous emissions trading scheme plans, using a mid-range carbon price of $30 a tonne.

With the Gillard Government yet to announce an actual price to be levied on the country’s thousand heaviest producers from July 1, 2012, Treasurer Wayne Swan has been told by his own department that at $30 a tonne, households would face increased costs of $16.60 a week.

This is more than $10 above the figure recently suggested by the Government’s climate change adviser, Ross Garnaut.

The tax would add $863.20 a year to household spending, before any compensation.

Annual electricity costs would rise $218, while petrol costs for an average family would rise $187 as a direct function of the new carbon cost. Gas would also cost $114 a year more and food, according to the modelling, would be $88 a year dearer.

The release of the modelling, under freedom of information laws, will add to community fears about cost-of-living impacts.

Late last year, the Government warned opponents against scaremongering.

“No final decisions on the starting price or assistance have been taken and therefore it is far too early to speculate on any potential price impacts,” Mr Swan and Climate Change Minister Greg Combet said in a joint statement yesterday.

“The figures released today under FOI were created to promote discussion within the Government even before a decision was taken on the current Carbon Price Framework.

“Until the final design and modelling have been settled, anyone who uses these figures to scare families about prices is engaging in a dishonest, misleading scare campaign.”

According to the modelling, electricity in a typical household would rise by $4.20 a week. But there would also be additional costs for gas, up $2.20 a week, petrol, up about $3.60 a week, and food, up by $1.70 a week.

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