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The purpose of this study is to find out whether the non-government ownership affects agency cost on banking sector, real estate and property sector, and insurance sector listed in Indonesia Stock Exchange in 2016. Determination of agency cost of a company in this study is projected by total asset turnover, which supports in this research is agency theory. The object of research in this study is banking companies, real estate and property companies, and insurance companies listed in Indonesia Stock Exchange in 2016, used purposive sampling in sampling companies. Collecting data done by library study, secondary data used in the form of time series data. Data analysis techniques use simple linear regression method and classical assumption test. The result showed that agency cost can be explained by non-government ownership of 0,2%, while the rest is explained by other variables outside this research model. The conclusion drawn from the study, that non-government ownership has no effect in detecting agency cost on banking companies, real estate and property companies, and insurance companies listed in Indonesia Stock Exchange in 2016.
ÂKeyword: Non Government Ownership, Agency Cost, banking, real estate, property sector and insurance sector