Question to the HM Treasury:

To ask the Chancellor of the Exchequer, what assessment he has made of the potential financial impact of the interaction between the tax and welfare systems on couples with dependent children who marry or begin cohabiting.

The Office for National Statistics publishes statistics on the effects of taxes and benefits on household income, including for households with children, in Table 12b of this publication: Effects of taxes and benefits on household income - Office for National Statistics