The growing increase in tourist trends, especially in the last few decades, has led to several changes that have occurred under its direct influence. The biggest changes of the kind that have occurred due to tourism have been experienced by tourism-receptive countries. Tourism is a phenomenon of the modern age and can have various direct and indirect effects on a country and its national economy. Due to the massiveness and complexity of tourism, its actual economic contribution cannot be precisely determined or calculated. For these reasons, the need to design a generally accepted and unique method of measuring the overall effects of tourism has emerged to accurately determine its actual impact and role in a country. Thus, a statistical calculation called the Tourist Satellite Balance (TSA) was created, the results of which clearly show the importance of tourism for the overall national economy. Many countries have been using the Tourist Satellite Balance for years, but it was not until 2008 that the first experimental version of the satellite balance for 2005 was developed in Croatia by the Institute for Tourism. Such a calculation, like the TSA, is of great importance because it allows a more detailed view of important components that are very often hidden and not included in the consideration of the impact of tourism activities. The first TSA as a means of measurement was developed by two international organizations: the UNWTO and the OECD, in cooperation with a large number of other significant institutions. The TSA was created in addition to the already established System of National Accounts (SNA) to facilitate and better include tourism statistics in national accounts statistics and to allow for international comparability of these data. In 2019, the tourism satellite account became part of the official statistics of the Republic of Croatia, so the calculation results obtained in this way can be compared with the results of other countries. In Croatia, previous satellite accounts have highlighted and pointed to the very high importance of tourism in the economy, but also in the share of GDP. One of the most positive aspects of the TSA is that it provides a more complete view of the effects than other and previous methods and is globally accepted, and it includes not only arrivals and overnight stays as direct effects but also many other values such as employee share in tourism, tourism expenditures, gross investment, tourists’ consumption, tourist production, etc. The preparation of Tourist Satellite Accounts is recommended for each country, and in Croatia, as a developed tourist country, it has been decided that it will be published every two years and will become part of official statistics, which would significantly improve the quality of overall GDP. This final paper aims to analyse in more detail the specifics of integrated satellite accounts and to assess the real contributions that arise as a result of tourist trends in the Republic of Croatia. Data and calculations as an information basis needed to accurately determine the magnitude of the tourism impact will be used from available statistical sources. Based on the obtained data from the existing TSA models, conclusions will be drawn in order to assess the role of tourism in the entire Croatian economy.