Taxing Working Families provides insights into how income taxes and social security contributions affect the distribution of income between different types of families in OECD countries. Certain generally available cash benefits for families – regarded as negative taxes – are also taken into account.

The study concentrates on the effects of these taxes on the distribution of income between different types of working households, looking at three dimensions of inequality: vertical inequality between households at different income levels, horizontal inequality between households with different numbers of children and the tax treatment of one-earner versus two-earner households.