Guarantees as an instrument to attract professional civil servants can be viewed as an item of public personnel management. The aim of the research conducted is to evaluate the link between state guarantees and performance assessment and the effect of social guarantees on motivation towards effectiveness. The authors evaluated research studies conducted in the sphere of perception of guarantees. In order to clarify the results gained in the studies analyzed in the paper the authors held an additional survey. The aims of the survey were to clarify the difference between guarantees and to reveal the perception of the candidates for the position in the public service. The authors inter viewed 5 public servants and made a survey on 64 public servants. The study revealed that guarantees are not linked with performance indicators that stimulate a public servant to demonstrate efficiency. The results of the study conducted could be implemented for the development of motivational instruments in the public sector.