The financial market of the European Union is structured in such a way that all financial services available in one member state are available to other member states. By opening the financial market to other EU member states, a large, strong and stable financial market has been created. One of the key approaches to achieving these goals is to create as similar legislation as possible for each particular financial market service. In the insurance market in the European Union, the Solvency II regulation has been adopted. The Solvency II regulation has several key objectives: to establish a quality insurance structure in which each member knows and performs his duties, to predict the risks, dangers and challenges of the market as accurately as possible, to establish the best possible structure in the insurance market and make the data available to the bodies of the European Union, accessible to all citizens. To this purpose Insurance Europe, the European Union's key institution for the insurance market, publishes insurance business data every year. In most countries of the European Union, the insurance market is stagnating. With the accession of the Republic of Croatia to the European Union, it was necessary to harmonize the regulations that were current at the market in the Republic of Croatia with the regulations prescribed by the European Union. In the field of insurance, this meant introducing the Solvency II regulation. Although Croatia experienced a decline in the insurance market immediately after its accession to the European Union, accession to the Union in the next few years brought great growth. The biggest changes in the insurance market in the Republic of Croatia after the accession to the Union occurred with the implementation of European Union regulations and the liberalization of the motor third party liability insurance market.