This is slightly lower than the Treasury modelling that found rises of 0.7 per cent in the first year, followed by 0.2 per cent later.

The lower result is due to updated household expenditure data from the Australian Bureau of Statistics that was not completed in time for the Treasury modelling.

Choice, the Australian Council of Social Service and the Climate Institute commissioned the modelling as the basis for a website that will allow people to use their personal details to find out what kind of price rises they can expect and how much assistance they will receive.

''Communities are looking for real information about their day-to-day costs and savings,'' the chief executive officer of the Australian Council of Social Service, Cassandra Goldie, said. ''For example, the carbon pollution price initially translates into 2¢ extra for bread and a litre of milk, 11¢ for a leg of lamb and 14¢ for a weekly spend on fruit and vegetables, but once you factor in ongoing government assistance, those weekly costs are largely covered and most people end up with money in their pocket.''

The modelling also compared the impact of the carbon price with the introduction of the GST, the mining boom and disasters such as cyclone Yasi. It found the carbon price would have one-quarter of the 2.5 per cent impact on prices than the introduction of the GST. It would also be smaller than the 1.6 per cent effect of the trade and exchange rates that came with the mining boom in 2007.