Families in Australian capital cities will pay higher income taxes and lose payments costing up to $2500 per household if Tony Abbott becomes prime minister, Julia Gillard will claim on Monday in a frontal assault on the opposition based on the cost of living.

Armed with new government modelling on the effects of Mr Abbott's plans to scrap the carbon and mining taxes and the various tax breaks and family benefits attached to their introduction, Ms Gillard will make a major pitch to the hip pocket.

Her message to former Labor voters is that if they elect Tony Abbott as prime minister, they will be thousands of dollars a year worse off.

The modelling uses Australian Bureau of Statistics data applied to a range of typical households.