In this study, vulnerability to poverty was investigated at micro level applying risk exposure criterion, augmented absolute poverty line, and FGT indices were applied to a sample of 120 households in three villages of Fasa Township, in Fars, Iran. Data in 2007 were collected randomly by interviewing and completing corresponding questionnaires. Based on the results, while nearly 47% of households are considered with minimum risk exposures, 40% have always the highest risk exposure levels and are vulnerable to poverty risk all the times. Poverty is a threat for the rest of families who are non-poor but vulnerable to poverty. Moreover, the results indicated that in order to have a perfect removal of poverty, households must be compensated much more than amounts needed to achieve absolute poverty line level. Furthermore, the impacts of each unit of supports to poor increase significantly with taking risk exposure criteria into account. Finally, risk exposure influences inner layers of poverty and may lead to more and quick decreases of poverty depth.