The aim of this study is to investigate the effect of political connections of companies and the presidential election cycle on the phenomenon of cost stickiness in the Tehran Stock Exchange. Cost stickiness refers to the difference in the speed of response of costs to proportional increases and decreases in the level of company activity. Financial data of 174 companies listed on the stock exchange were collected and analyzed during the years 1396 to 1403 (an 8-year period) to test the hypotheses. To fit the model and test the relationships, the Panel Data regression model was used using EViews software version 13. The results of the analyses clearly showed that political connections of managers and companies significantly increase cost stickiness. This finding indicates the tendency of political companies to maintain their excess capacities. However, statistical evidence showed that the presidential election cycle does not have a significant relationship with cost stickiness behavior. As a result, political considerations (especially enduring political ties) are an important factor in explaining the cost behavior of Iranian companies that should be taken into account by analysts and regulators.