The Turnbull government has been sitting on advice that an emissions intensity scheme - the carbon policy it put on the table only to rule out just 36 hours later - would save households and businesses up to $15 billion in electricity bills over a decade.

While Malcolm Turnbull has rejected this sort of scheme by claiming it would push up prices, analysis in an Australian Electricity Market Commission report handed to the government months ago finds it would actually cost consumers far less than other approaches, including doing nothing.

It finds that would still be the case even if the government boosted its climate target to a 50 per cent cut in emissions by 2030.

Depending on the level of electricity use and the target adopted, modelling by Danny Price of Frontier Economics found costs would be between $3.4 billion and $15 billion lower over the decade to 2030. Costs would be $11.2 billion lower over this time assuming average electricity use and the existing climate target.