||This thesis examines the relation between working in a non-profit sector and subjective perception of happiness. The first part is dedicated to introduction and historical context of happiness. The second part examines various literature dedicated to this phenomenon. In the last part statistical regressions are estimated to prove or reject the correlation using data from US National Longitudinal Survey of Youths 1997. Most of the models render the relation as insignificant, from one model we get that people from low-income families tend to be happy all of the time less often when working in a non-profit organization.