The present study investigates the impact of the Coronavirus crisis on the cost management of construction projects. The present study is applied in terms of aim, descriptive and survey in terms of method, and cross-sectional in terms of time. The statistical population of this study included companies that have a portfolio of construction projects with a budget of over 2000 billion Rials. Based on the number of construction projects in the province, and based on the stratified sampling type, 30 projects were selected from interurban, center, and suburban of Isfahan province. A questionnaire was used as a data collection tool in this study. Calculations and analysis were done in Spss Software, and the level of significance for all tests was considered at p > 0.95. To identify the causes of the damages caused by the outbreak of the disease to control this crisis, to determine the damages and prevent the increase of costs, prioritizing the damages and classifying the problems were studied. The results related to the cost indicated that in terms of importance, a delay in payments was ranked first; an increase in the price of raw materials was ranked second, and the personnel commuting cost was ranked third. Since the level of significance in the variables of delay in payments (with a correlation coefficient of 0.551), bank formalities and closures (with a correlation coefficient of 0.506), public holidays with a correlation coefficient of (0.446), and observing the protocols (with a correlation coefficient of 0.484) is less than 0.05, these variables increase the cost of projects.