Shadow treasurer Joe Hockey said the Coalition would support these welfare benefits.
''The Family Tax Benefit Part A and the allowances which are out in 2013, we are inclined to support because the carbon tax will have an impact on families,'' he said this morning.
If the Coalition is elected and abolishes the mining tax, it would have to find the $2.9 billion from other areas, creating a potential cost-blowout in its costings.
The Coalition will oppose another handout - the so-called Schoolkids Bonus - which is not being funded by the mining tax.
''This sugar hit cash payment that they have to get out before the first of July we are going to oppose,'' he said.
''It is bad policy, it is not linked in any way to education it is simply about a bribe to the Australian electorate and the Australian electorate won't like it.''
This measure will pay families $410 a year for each child of primary school age and $820 for each child of high school age.