The Inquérito às Despesas das Famílias 2010/2011 (IDEF 2010/2011) was carried out by Statistics Portugal between March 2010 and March 2011. This publication (paper and CD-ROM) presents the statistical results on structure of expenditures and income distribution of the private households residing in Portugal, and also about its well-being indicators. It corresponds to the most recent edition of the series of surveys on household budgets initiated in the 60’s. Statistical information is organized in five perspectives: distribution of the number of private households according to several socioeconomic characteristics; average annual expenditure by private household; average income by private household; adult equivalent income, poverty and inequality; and a few well-being indicators. The publication also includes a chapter about sampling methodology and estimation.