This master's thesis examines the effects of corruption on the economy. To measure the effects of corruption, we observed indicators that are also used by the International Monetary Fund, but in the case of such a complex phenomenon as corruption, the measurement is limited to the perception of corruption and not to the observation and analysis of individual cases. is limited to certain areas. Corruption should be observed in two categories, the professional literature suggests two different approaches to classifying corruption, which differ according to purpose, but in any case it is a personal interest or obtaining certain benefits for an individual in most cases a property benefit or service. The effects of corruption on the economy have proven to be negative, as in the case of corrupt practices there is a lack of confidence in the fair treatment of business and business agreements. In the international environment, corruption or restriction of economic freedoms affects the confidence of foreign investors in the state apparatus. Within the local and wider environment of the Republic of Slovenia, the fight against corruption is successful, within the EU indicators have shown that trust in state authority or in certain phenomena in the general social order is higher than the world average, the fight against corruption at EU level is to some extent legal frameworks have been formalized or established to limit corruption. Corruption has a negative effect on business and the business climate, no matter where it occurs, and it must be combated from the point of view of state apparatus and laws, as well as through anonymous reporting of corruption not only in the public sector but also in the private sector.