The article discusses the issue of household financial security after retirement. Study presents results of the analysis of use financial market instrument, which is a bank deposit, to improve the material situation of household, which is already in the phase of inactive earnings. Statistical data published by the Central Statistical Office and the National Bank of Poland were used to carry out the relevant calculations. A 15-year study period, covering the years 2000-2014, was taken for analysis. The research method was analysis of collected data, by using mathematical methods and analysis of the literature.