This study is one of the first attempts to discover how long households in Poland remain in poverty (out of poverty) and whether the time spent in poverty (out of poverty) depends on the socio-economic group of household. The analysis is conducted using panel data collected in the project ”Social Diagnosis” in 2000-2013. We analyze the survivor functions of staying in poverty (out of poverty) using the Kaplan-Meier method. The probability of survival for a long time in poverty is less than in the case of survival out of poverty. It should be noted that a small percentage of households remained in poverty for almost the entire period of the study. We compare the survival functions of staying in poverty (out of poverty) according to the socio-economic groups of households. For this purpose we use the log-rank test. In both cases the survivor functions are significantly different. Households of the self-employed survive longer out of poverty and simultaneously survive shorter in poverty than the other groups of households.