Insurance is a term that is more or less familiar to everyone. Every man and his property is exposed to dangers and therefore strives for security and some kind of protection. Preventive measures can partially mitigate the harmful effects of certain hazards, but there is no possibility to provide economic protection from all hazards that threaten property and people. The meaning and purpose of insurance is to cover uncertain financial losses with funds collected in advance. Liability insurance has a number of positive effects, primarily the protection of the economic interests of the insured person and his property, which facilitates the smooth development of the professional activity of the insured. The topic of this final paper is based on liability insurance exclusively for contractors and their employees. Insurance of persons and property on construction sites is extremely important for contractors and their workers because they are compensated for the financial loss due to the damage that occurred. Liability insurance guarantees greater security for the company and the environment in which it operates.