The master’s thesis focuses on determining of methodology for calculating of tax base in the service permanent establishment of Slovak tax resident in the Czech republic. Based on analysis of Czech accounting, tax regulations and OECD model agreement, data are used to determine the methodological manul and its subsequent application.

Aim of my master’s thesis on the topic „International Tax Planning and its Impact on Company's Economy“ is to evaluate current business model of the firm Jelko which is using it for products selling to the Slovakia. Based on the currect model analysis I will introduce other models, which could cause higher efficiency of advantageousness. I will analyse advantages and disadvantages of each model and following this analysis I will choose the best model which I will recommend to the firm in order to consider it and eventually to implement it.

The diploma thesis focuses on taxation of employment income of a resident of the Czech Republic who receives income from sources within the United States of America. It analyzes the relevant convention for the avoidance of double taxation and domestic as well as foreign tax legislation. Basing on the analysis, methodology for determination of tax liability of a defined taxpayer is suggested at simultaneous utilization of available means of tax optimization.

This thesis focuses on international taxation of individuals in the Czech Republic and Ireland. The thesis includes an explanation of taxation procedure of personal income from wages earned in Ireland while being tax resident of the Czech Republic. Relevant legislation and basic concepts of taxation are introduced as well.

This diploma thesis deals with the international hiring out of labour force between the Czech Republic and other member states of the European Union. It focuses on hiring out of employees between parent companies and subsidiaries. This diploma thesis describes the situation of the international hiring out of employees, suggests method of taxation of these employees and defines subjects responsible for fulfilment of obligations in the area of income tax and social security.

This diploma thesis deals with the obligations for implementing the construction project in the Slovakia and its taxation. At first is defined basic terminology, concept of single market of the European Union and the harmonization process of direct and indirect taxation. In the analytical part of the thesis are relevant sources of international, union and national law analyzed. The practical part is focused on specification construction contract, accomplishment all obligations and an exemplary taxpayer's tax liability is calculated.

This master´s thesis concerns optimalization of company taxation. The aim is, through analysis of the company KHF GROUP, s.r.o., suggest steps to optimalization of taxation.

Die vorliegende Arbeit besteht aus vier Aufsätzen zum Thema Besteuerung, welche sich in drei Themenblöcke unterteilen lassen: Die ersten beiden Aufsätze dieser Arbeit (Maiterth/Chirvi 2015 sowie Chirvi 2019) widmen sich dem deutschen Ehegattensplitting, der dritte Beitrag (Chirvi/Maiterth 2019) behandelt die Besteuerung gesetzlicher Renten in Deutschland und der vierte Aufsatz (Chirvi/Schneider 2019) untersucht Präferenzen bzgl. der Besteuerung von Vermögen in den USA. Eine Aufteilung anhand der behandelten Steuerarten macht die Arbeit noch übersichtlicher: So behandeln die ersten drei Aufsätze jeweils Aspekte der Einkommensteuer, während sich der vierte Beitrag verschiedenen Arten der Vermögensbesteuerung widmet. Es lässt sich ergänzen, dass die Aufsätze zur Einkommensteuer sehr eng mit dem deutschen Steuerrecht verbunden sind. Sie beschäftigen sich mit existierenden Regelungen (§ 26 sowie 32a EStG zum Ehegattensplitting bzw. § 10 sowie 22 EStG zur Rentenbesteuerung) und deren Auswirkungen. Dies gilt insbesondere für die Beiträge Maiterth/Chirvi (2015), in dem ein Forschungs- und Rechtsprechungsüberblick zum Thema Ehegattensplitting geliefert wird, sowie Chirvi/Maiterth (2019), in dem eine potentielle Doppel- oder Minderbesteuerung gesetzlicher Renten durch das AltEinkG untersucht wird. Der Aufsatz Chirvi (2019) untersucht Arbeitsangebotswirkungen des Ehegattensplittings und ist daher etwas weniger eng mit dem deutschen Recht verknüpft, da sich zumindest ähnliche Regelungen auch in anderen Ländern finden. Der Beitrag zur Vermögensbesteuerung, Chirvi/Schneider (2019), untersucht dagegen Präferenzen in Bezug auf – bis auf die Nachlasssteuer („estate tax“) – nicht existierende Vermögensteuern in den USA. Zwei der Aufsätze wurden in der Zeitschrift Steuer und Wirtschaft publiziert, die anderen beiden wurden in der arqus Working-Paper-Reihe veröffentlicht. / This dissertation consists of four papers on taxation that can be divided into three different subject areas: The first and the second paper (Maiterth/Chirvi 2015 as well as Chirvi 2019) deal with the ‘income splitting’, i.e. the taxation of married couples in Germany. The third paper (Chirvi/Maiterth 2019) analyzes effects of a reform regarding the transition to downstream taxation of public pensions. Finally, the last paper (Chirvi/Schneider 2019) examines preferences for the taxation of wealth in the United States. While the first three papers analyze (the effects of) specific regulations within the German income tax code (income splitting in Art. 26 and 32a of the German income tax code; the taxation of public pensions in Art. 10 and 22 of German income tax code), the fourth essay is about partially hypothetical types of capital taxation. Maiterth/Chirvi (2015) review the literature on the topic in the areas of public economics, business taxation and tax law and compile arguments for and against the income splitting. As many researchers point out that the income splitting may lead to disincentives for married women to work, Chirvi (2019) empirically analyzes its labor supply effects based on a new approach. Chirvi/Maiterth (2019) evaluate whether the AltEinkG, a reform that lead to a successive transition to downstream taxation, results in under- or double taxation of public pensions in Germany. They develop a measure and subsequently estimate potential under- or double taxation based on official income tax data. Chirvi/Schneider (2019) are interested in preferences regarding capital taxation and conduct a survey-experiment on mTurk to reveal whether preferences depend on the type of tax and/or attributes of assets and personal characteristics. Two of these papers have already been published in the scientific journal Steuer und Wirtschaft, the others can be found in the arqus working-paper series.

過去許多企業，將企業原本擁有的智慧財產（例如：專利、商標、營業祕密…）與企業的其他資產、負債，分離出來，成立智慧財產控股公司，並透過智慧財產供股公司的經營管理，獲取大量的租稅利益。此一租稅規劃工具雖然已引起稽徵機關的注意，但運用得當，仍可為企業創造可觀的利潤。 智慧財產控股公司的設立架構，母公司通常會在低稅率的國家或州，設立一完全控股的子公司，由智慧財產控股公司自行創設、或自母公司繼受智慧財產。智慧財產控股公司授權的對象，可能是母公司、亦可能為不相干的第三人。 智慧財產控股公司的租稅效益，來自智慧財產控股公司通常選在低公司稅率（甚至零稅率）的地區設立，對於權利金收入予以免稅的地區。母公司付給子公司的權利金費用，母公司可作為費用扣除，藉以降低母公司的所得稅。智慧財產控股公司可透過發放股利，或對母公司融資等方式，解決母公司的資金需求。 透過智慧財產控股公司進行租稅規劃，最重要面臨『移轉定價』與『避免濫用租稅協定』，因此智慧財產控股公司進行的關係人交易，不能是純為獲取租稅利益的假交易，必須有商業實質。 / Over the last decade or so, many businesses generating significant revenue from intellectual property such as patents, copyrights, trade names and marks, software and know-how (the IP Assets) have organized intellectual property holding companies (IPHCs) to reduce federal and state taxes while separating valuable IP Assets from other corporate liabilities. Recently, states have started to aggressively challenge this tactic. However, substantial state and federal tax savings can still be realized if IPHCs are organized and operated correctly. The structure of an IPHC is fairly simple. The parent corporation typically creates a corporate subsidiary in a state or in a foreign country where little or no taxes are imposed . IP Assets are created by or transferred to the subsidiary. The subsidiary enters into license agreements under which the parent corporation and non-related corporations agree to pay the IPHC royalties in exchange for an exclusive or non-exclusive right to use the IP Assets. Since most IPHCs are organized in jurisdictions with no income tax, the royalties received by the IPHC are generally tax-free. In addition, the parent corporation that paid the royalty typically can deduct the payment as a deductible expense, thereby reducing the parent's income or franchise tax liability. In some circumstances, IPHCs can make tax-free dividend distributions or loans to the parent corporation. The key issue IPHC should consider is “Transfer Price Issue” and “Anti Treaty Shopping Issue”. Transactions between related parties can’t be shame transaction, business substance is required.

Les six pays qui forment le Conseil de Coopération du Golfe (CCG) disposent encore collectivement de vastes réserves de pétrole et de gaz. Mais pour combien de temps ? Arabie Saoudite, Bahreïn, Émirats Arabes Unis, Koweït, Oman et Qatar n’ont pendant longtemps imposé que les sociétés pétrolières étrangères. Conscients de la limite de la manne pétrolière, ils cherchent depuis plusieurs années à diversifier leur assise économique en attirant toujours plus d'investissements directs étrangers, autres que pétroliers. Un droit fiscal commun, applicable aux activités commerciales et industrielles des entreprises étrangères, a ainsi vu le jour en Arabie Saoudite, au Koweït, en Oman et au Qatar. Ce régime fiscal se distingue à la fois par de faibles taux d’imposition et par le renforcement permanent des moyens de recouvrement et de contrôle des opérations internationales des entreprises étrangères. Les entreprises françaises qui opèrent dans cette région bénéficient toujours, en application des conventions contre la double imposition, d’une suppression des retenues à la source sur leurs revenus issus des pays du CCG. C’est un avantage fiscal considérable par rapport à leurs homologues domiciliées dans d'autres pays occidentaux. Mais aujourd’hui, les sociétés françaises doivent faire face à une politique fiscale plus « agressive ». Elles sont confrontées à des systèmes fiscaux attractifs mais évolutifs, très diversifiés et de plus en plus coercitifs. / The six Arab states of the Gulf Cooperation Council (GCC) still hold collectively vast reserves of oil and gas. But for how much longer? Saudi Arabia, Bahrain, United Arab Emirates, Kuwait, Oman and Qatar have for a long time taxed only foreign oil companies. Aware of the limits of the oil godsend, these countries are currently seeking to diversify their economic basis by drawing in ever more foreign direct investment outside of the fossil fuel sector. New taxation laws applicable to foreign commercial and industrial activities have therefore been enacted in Saudi Arabia, Kuwait, Oman and Qatar. These laws share two main characteristics: low tax rates and strengthened measures to collect taxes and control the international operations of foreign companies. Under double taxation treaties, French companies operating in that region still enjoy exemption from withholding tax on their GCC revenue. That is a considerable advantage compared to their counterparts based in other Western countries. Yet French companies must now encounter an "aggressive" fiscal policy. They are confronted with attractive fiscal systems but constantly changing, diverse and coercive.