High IQ scores and raw talent in a specific area are no longer good enough indicators for predicting business success. Grit is a personality trait which shows that human potential is almost limitless when enough effort is added. Organizations can use that potential by incorporating practices that encourage passion and perseverance. The aim of this study was to discover the perception of passion and perseverance levels of employees in Croatia in selected organizations and to determine if there are any differences in those levels between different test groups. The survey was conducted via an online questionnaire on 157 participants of both sexes within these organizations: Multivac d.o.o., Grupa Kolor d.o.o., Digihey d.o.o., The Croatian national bank, Oktal Pharma d.o.o. and on employees and students of Vern’ University. The research results show that the average grit score of all participants was 3.59 and grit scores were following the normal distribution. Levels of perseverance were higher than levels of passion. Married individuals have shown higher grit levels than participants within other marital statuses. What’s more, participants with college degrees have shown higher grit levels than participants with other types of education and female participants have shown higher grit levels than male participants. With regards to age, older participants have shown higher grit levels than younger participants. Likewise, individuals with longer tenure in their current profession have shown higher grit levels than those with shorter tenure. The results of this research can contribute to the understanding of the importance of passion and perseverance in organizations. Recommendations that support the growth of passion and perseverance levels include two ways. Growing grit from the inside by changing the individual’s way of thinking and growing grit from the outside by introducing educational programs in schools. The research on grit in Croatia is still in its early stages, so further research is recommended.