Social and welfare issues

OECD Income Distribution Database (IDD): Gini, poverty, income, Methods and Concepts


To benchmark and monitor income inequality and poverty across countries, the OECD relies on a dedicated statistical database: the OECD Income Distribution Database which offers data on levels and trends in Gini coefficients before and after taxes and transfers, average and median household disposable incomes, relative poverty rates and poverty gaps, before and after taxes and transfers, etc. Due to the increasing importance of income inequality and poverty issues in policy discussion, the database is now annually updated. If you would like to be informed by email when the database is updated, please contact

IDD Database

10 September 2019: Starting from December 2017, the OECD IDD database is no longer updated annually but more frequently, 2-3 times a year. New data are available for Costa Rica (income year 2018), Canada, Chile, the United Kingdom and the United States (income year 2017), Denmark, Ireland and the Russian Federation (income year 2016) and Hungary (new data source, income years 2006-16). See data:

13 December 2018: Inequalities in emerging economies: Informing the policy dialogue on inclusive growth, OECD Statistics Working Papers, No. 2018/13 
November 2016: Release of OECD Inequality Update 2016 "Income inequality remains high in the face of weak recovery"

See also:


METHODs and concepts 


Quality reviews

This quality review (December 2012) is in three main parts:
-Part I reports the results of a first self-assessment of different quality dimensions of the OECD Database on Household Income Distribution and Poverty (.pdf)
-Part II assesses the cross-country comparability of the OECD Earnings Distribution Database (.pdf)
-Part III provides detailed country data reviews on income distribution data, for the 34 OECD member countries. These country reviews compare the OECD benchmark series for income distribution and poverty reporting with alternative estimates which are available on a national or international basis -  each country separately (.pdf) including revised versions:

See also external Review of the OECD Income Distribution Database - The Journal of Economic Inequality - December 2015, Volume 13, Issue 4,  pp 579–602


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