The main purpose of the Manual on Corruption Surveys is to provide countries with methodological and operational guidelines for developing and implementing sample surveys, both among the population and among businesses, in order to measure the prevalence of bribery at national level and to collect other relevant information on corruption. A particular goal of this Manual is to support countries’ measurement of their progress towards achieving Sustainable Development Goal 16 target 5: “Substantially reduce corruption and bribery in all their forms“. In highlighting the value of producing experience-based statistical information on corruption, the advantages and disadvantages of different approaches to measuring bribery and other forms of corruption are also illustrated.