Projected annual savings in electricity costs of $550 per household from scrapping the carbon tax may be dwarfed by the withdrawal of up to $3500 per household in other government payments linked to it and the mining tax, according to new research.

The Australian Institute modelling, based on a low-income family with two working adults and three school-age children, has concluded the withdrawal of several payments and offsets associated with the clean energy package and others notionally funded by the Minerals Resource Rent Tax will take away more money than will be saved after the carbon tax is repealed.

The government has convened a two-week session of the Senate from Monday with the prime purpose of repealing Labor's two most unpopular and politically costly taxes, the carbon and mining taxes.

Both repeals were clear Coalition promises before the election but have been blocked in the Labor-Greens dominated Senate.

But with the new Senate, the government believes it has the numbers to dump both taxes and a raft of measures associated with them.