The aim of diploma thesis is evaluating the financial efficiency of investments in small and medium sized enterprises in chosen economic sector of Slovakia. The first part of diploma thesis deals with financial sources of small and medium enterprises and analyse the situation in Slovakia. The end of the first part is dedicated to the topic of health care and welfare provided for retired people in Slovakia. The methodology of diploma thesis determines static, dynamic and supplementary methods of evaluating investment projects. The practical part is focused on evaluation of investment efficiency in Horehronie region. We prepared an investment plan for building a facility for seniors in Helpa. We mostly used dynamic methods to evaluate our investment. Based on the results, we defined recommendations that will secure the future success of our investment project.