With the development of international cooperation and integration grows the importance of the insurer within the financial market. Therefore, it is necessary to determine the importance of certain type of insurance, in this case liability insurance. Liability insurance consists mostly of liability insurance for motor vehicles which is mandatory, so there is understandable signifincance of liability insurance and closely related process of price liberalization in the insurance market. Comparing liability insurance in Republic of Croatia and Poland there has been noted the similarity of movement in gross written premiums and paid claims. Furthermore, the gross written premium in Poland is aproximately equal to the gross written premium per capita in Croatia.