Unemployment and related welfare benefits help prevent those without work from falling into poverty but can at the same time reduce the incentive to work; this is one of the main dilemmas of social policy. Launched in 1998, the latest edition of this series (formerly entitled Benefit Systems and Work Incentives) provides detailed descriptions of all cash benefits available to those in and out of work as well as the taxes they are liable to pay across OECD countries. A special chapter also compares childcare costs across countries and the financial work incentives faced by parents of young children. Using the OECD tax-benefit models, total household incomes and their components are calculated for a range of family types and employment situations. The results are used to examine financial incentives to work, either part-time or full-time, as well as the extent to which social benefits prevent income poverty for those without a job. This volume presents results for 2005 and earlier years.