Law is always closely linked to reality and, for this reason, its areas intertwine constantly. This is how, considering the taxes that arise from the work relations, it is understood that Labor Law and Tax Law have different meeting points. Currently, a phenomenon referred to as “taxation of Labor Law” is happening and, as a complex process, it requires a detailed analysis.Is it really an interdisciplinary topic or is this a case of invasion from one branch of Law to another? Do they just have points in common or do they differ also? The author examines these and other questions and to do so, herefers, among other topics, to the role that the Sunat has in these circumstances. / El Derecho está íntimamente vinculado a la realidad y, por tal motivo, sus ramas se entrelazan constantemente. Así, considerando los tributos que surgen de relaciones laborales, se entiende que el Derecho Laboral y el Derecho Tributario tienen diversos puntos de convergencia. Actualmente, se está dando el fenómeno denominado “tributación del Derecho Laboral” y, como un proceso complejo, requiere de un análisis detallado. ¿Es un tema interdisciplinario o estamos ante un supuesto de invasión de una rama del Derecho a otra? ¿Sólo tienen puntos en común o también divergentes? El autor plantea resolver éstas y otras interrogantes haciendo referencia, entre otros, al rol de la Sunat en estas circunstancias.

This final thesis deals with comparison of labor taxation in selected countries of the European Union: countries of Visegrad 4 and Germany. One of the essential goals was to find labor taxation for determined income levels and comparison of total labor taxation between selected countries. Next goal was to implement elements of most optimized labor taxation to Czech tax system. The first two chapters represent description of labor taxation: of personal income tax and social contributions in selected countries. Third chapter analyzes labor taxation for determined levels of income for every each country. Fourth chapter deals with the comparison of the labor taxation between selected countries and reflects differences of tax systems. Last fifth chapter analyses implementation of labor taxation elements of other examined country to the Czech tax system.

The thesis entitled Comparison of revenue and expenditure of the state budget for the self-employed and employees for the entire active and retirement period of life of individuals under conditions of 2015 deals with how, whether and under what conditions the self-employed are less taxed than their colleagues working in full-time employment with a comparable income. The model example points out the income threshold at which individual is better off being self-employed, and when it is more advantageous from the viewpoint of the state to be an independent contractor, not an employee. The models include the self-employed, who are misclassified as well as factors such as different amount of sick leave, lower pensions, lower unemployment benefits caused by lower deductions for social insurance, and other factors that are not immediately obvious but markedly influence the total amount of income and expenses to the state of the individual when working as self-employed or an employee.