Introduction. Risk assessment is an integral initial stage of the risk management procedure aimed at reducing damage to the health and life of employees. Currently, the legislation does not establish uniform concepts and criteria for assessing occupational risk. Scientific literature presents a variety of approaches and methods for assessing occupational risk from harmful and dangerous factors of industrial activity. Problem Statement. It is necessary to develop a model for assessing occupational risk in the units of the Federal Fire Service of EMERCOM of Russia, which allows us to take into account the likelihood of harm to the health of an employee as a result of exposure to harmful and (or) dangerous industrial factors and the severity of health disorders as a result of such exposure. Theoretical Part. For the assessment of occupational risk in the units of the Federal Fire-Fighting Service of EMERCOM of Russia, we take the definition of risk established by the National Standard of the Russian Federation GOST R 12.0.010-2009 "Occupational safety standards system. Occupational safety and health management systems. Hazard and risks identification and estimation of risks". The assessment of the probability of causing harm to the health of an employee was carried out using the following indicators: the frequency of injuries, the frequency of death, the frequency of disability. The severity of health disorder was assessed through the indicator of labor loss by personnel from health damage. Conclusion. The paper considers various methods for assessing occupational risk from harmful and hazardous factors of industrial activity. A mathematical model is proposed for assessing the risk of health damage in the units of the Federal Fire Service of EMERCOM of Russia on the principle of labor loss by personnel from various types of health damage. Its values were calculated for employees of the Federal Fire Service of EMERCOM of Russia for 2015-2019.