The diploma thesis is focused on issues of the tax havens and their use in international tax optimization. The paper processed knowledge of tax planning and the need to optimize the tax burden of the tax payer, with the help of offshore landscapes. In the first one, there is the theoretical basis and the issue of tax havens and tax planning, which in practical part is followed by ananalysis of selected countries and the design of optimal structure of taxation.

El presente trabajo analizará los regímenes tributarios relacionados con las microempresas en el Perú. Además, de los resultados obtenidos, esta investigación dependerá de la inspección de los antecedentes nacionales, para comprender la magnitud de la problemática; y también de la revisión de antecedentes internacionales, para tener en cuenta la forma en que otros países latinoamericanos han enfrentado este tema y los pasos que han dado. La importancia de la investigación de este tema radica en los efectos inmediatos sobre la administración tributaria y los contribuyentes. Esta influencia en la administración tributaria se debe principalmente al alto nivel de informalidad en el país, causado por la evasión y elusión de impuestos. Esto suele significar que solo una parte de esos contribuyentes tiene una carga tributaria y, la otra parte de esos contribuyentes goza de los beneficios sin ninguna obligación ante las autoridades tributarias. En ese sentido, nos centraremos específicamente en la evaluación del Nuevo Régimen Único Simplificado (NRUS) y del Régimen Mype, así como en el impacto que tienen en la recaudación de impuestos, sobre todo en las microempresas, que representan el mayor porcentaje de la participación de la industria peruana. Para esta finalidad, se analizará el marco conceptual y también el marco regulatorio que ha regulado a las microempresas a lo largo de las décadas. Finalmente, plantearán las conclusiones al presente trabajo y la opinión crítica con respecto al problema examinado. / This paper will analyze the tax regimes related to microenterprises in Peru. In addition to the results obtained, this research will depend on the inspection of national antecedents, to understand the magnitude of the problem; and also on the review of international antecedents, to take into account the way in which other Latin American countries have faced this issue and the steps they have taken. The importance of researching this topic lies in the immediate effects on the tax administration and taxpayers. This influence on tax administration is mainly due to the high level of informality in the country, caused by tax evasion and avoidance. This usually means that only a part of those taxpayers have a tax burden and the other part of those taxpayers enjoy the benefits without any obligation before the tax authorities. In this sense, we will focus specifically on the evaluation of the New Simplified Single Regime (NRUS) and the Mype Regime, as well as the impact they have on tax collection, especially on micro-enterprises, which represent the largest percentage of the Peruvian industrial participation. For this purpose, the conceptual framework will be analyzed, as well as the regulatory framework that has regulated micro-enterprises throughout the decades. Finally, the conclusions to the present work and the critical opinion with respect to the problem examined will be presented. / Trabajo de investigación

We analyze the impact of tax policy on the market entry of firms in the presence of corruption and tax evasion. In a world with corruption, firms must bribe corrupt officials to enter the market. For a given level of bribes, higher tax rates and stricter enforcement of taxation decrease tax evasion but typically reduce market entry. However, when the level of bribes reacts to tax policy, higher taxes and stricter enforcement of taxation can have a double benefit. Up to a certain threshold, for which we develop a simple rule, stricter enforcement increases market entry and reduces tax evasion.

/ Résumé / Zusammenfassung Transfer pricing is currently a very relevant topic. Tax administrations are focusing on unveiling and penalizing tax evasion and in author's opinion also on prevention and reduction of tax optimization using intragroup transactions with price designed to minimize taxation. The volume of tax base and tax adjustments by tax administrations multiplied in recent years without significant changes in relevant legislation and that raises a question whether this change is not contrary to the principle of legality use of powers conferred by public law. This thesis analyzes reasons for these changes, which are connected to significant increase in number of group cross border transactions. In European context the increase is partially result of intensive economic integration of member states. Second important aspect leading to the relevance of this topic is the intensity public perception of this issue which to large extent eliminates the difference between tax avoidance and illegal tax evasion. The thesis generally focuses on transfer pricing in European context created by the activities of OECD reflected by EU legislation. The analysis shows that the OECD document on the issue are very beneficial instruments and their use is in many cases unified by the EU, which analyzes the...

La fraude et l’évasion fiscales focalisent l’attention des Gouvernements depuis la crise financière de 2008 bien que le problème soit ancien. Face à l’ampleur d’une crise aux conséquences dramatiques, les gouvernements ont pris conscience de l’urgence d’une action efficace. La lutte contre ces pratiques prend une ampleur nouvelle depuis qu’elle est considérée comme un enjeu majeur. Jusqu’à présent les fraudeurs bénéficiaient d’une certaine clémence mais les scandales récents qui ont éclaté mettant en cause des paradis fiscaux, jumelés à la crise qui fait rage, leur ont fait prendre un tout autre visage. Beaucoup d’Etats qui rechignaient jusqu’alors à coopérer en matière fiscale se sont vus contraints de le faire face à la pression internationale grandissante.L’étude fait apparaître que les paradis fiscaux ne sont pas les seuls responsables de la crise. Le problème de la fraude et de l’évasion doit être pensé dans un cadre global. La théorisation des notions de fraude et d’évasion, nous permettra de comprendre les raisons des pratiques qui s’y rattachent et les conséquences qu’elles peuvent avoir. L’exemple des Emirats Arabes Unis éclairera les raisons qui font de certains territoires de véritables pôles d’attractivité pour les entreprises et les particuliers. Force sera de constater qu’elles ne sont pas seulement fiscales.Face à l’internationalisation, les Etats ne peuvent plus de nos jours réagir de manière nationale et isolée. La réponse se doit d’être internationale et concertée. Ainsi, après avoir étudié les moyens de lutte contre ces pratiques dommageables qu’utilise l’administration fiscale, nous verrons comment cette dernière tente de poursuivre cet objectif sans pour autant porter préjudice aux droits et aux garanties du contribuable. Mots clefs français : impôt, fraude, évasion fiscale, contrôle fiscal, protection du contribuable, paradis fiscaux, offshore, délocalisation, zone franche, Emirats Arabes Unis, lutte contre la fraude et l’évasion fiscale / Although the matter is old-dated, the Governments have focused their attentions on tax evasion and tax avoidance since the 2008 financial crisis,. Facing a major crisis with dramatic aftermaths, the governments have become aware of the urgent need of an efficient action. Considered as a major stake, the fight against these practices is now taking a new scale. Until now the tax evaders benefited from a certain leniency but the recent scandals which broke are questioning the tax havens, that are associated to the raging crisis and gave them quite a different face. Many States, which until then balk at cooperating about tax matters, were obliged to do so in front of the growing international pressure. Our study demonstrates that the tax havens are not the only responsible to the crisis. The tax evasion and tax avoidance problem must be thought in a global frame. The theorization of the notions of tax evasion and tax avoidance, will allow us to understand the reasons and the consequences of these practices. The example of the United Arab Emirates will put into light the reasons that make certain territories real attractive poles for companies and individuals. It will be noticed that these reasons aren’t fiscal only. Due to globalization, the States can’t nowadays react anymore in a national and isolated way. The answer owes to be global and broadly discussed.Thus, after having studied the tools used by the tax authority to fight against these harmful practices, we will see how the tax authority is trying to pursue its goal without being prejudicial to the rights and the guarantees of the taxpayer. Keywords : tax, tax evasion, tax avoidance, tax investigation, taxpayer protection, tax heavens, offshore, relocation, free zone, the United Arab Emirates, fight against tax evasion and tax avoidance.

The purpose of this study was to develop a conceptual framework to aid in the reduction of the taxation gap in South Africa (SA) through the use of third-party data and information technology. In order to develop a framework to prevent non-compliance, an understanding was required of the areas that would enable such a framework to be successful. Since governance, risk and compliance (GRC) is an emerging area in the corporate and information technology domain, organisations, including revenue bodies, are confronted with an increased risk and a growing number of regulatory, legal and other compliance requirements. The frame of reference for integrated governance, risk and compliance was used as base to determine the areas that had to be included in the new feasibility framework for the South African Revenue Service (SARS) in order for the framework to enhance compliance. Thus, the frame of reference for integrated governance, risk and compliance provided a contextual understanding of the areas that had to be reviewed in order to ensure that the framework that was developed adhered to all aspects that would make it a suitable and acceptable framework within SARS. Since the new conceptual framework will be used to address compliance and risk management, existing frameworks had to be considered – one in particular, namely the Compliance Risk Management Process as described by the Organisation for Economic Co-operation and Development (OECD). The OECD guidance note outlines compliance risk management as a structured iterative process for the “systematic identification, assessment, ranking, and treatment of tax compliance risks” that will enhance decision-making. This structural process is depicted in the Compliance Risk Management Process which can be used by revenue bodies, including SARS. Thus, once the different areas had been identified, discussed and understood, the existing Compliance Risk Management Process as described by the OECD was discussed to identify how the new conceptual framework that would be developed as part of this study could enhance this existing framework. Finally the framework was developed by making use of an extended literature review on the main characteristics of ‘big data’, which was then tested with the use of two selected case studies and concluded with a comparative analysis of the case studies. Overall, the framework will aid to determine whether it is feasible to continue with a project to use third-party data and information technology to automate the detection and prevention of taxation gaps before spending too many resources without any significant effect on diminishing the taxation gap. It is therefore recommended that SARS implement this new feasibility framework as a pre-check in order to determine whether:  there is third-party data available for a specific type of transaction that will result in the reduction of the taxation gap;  the third-party data is reliable and usable. If not, which changes are required from the third party in order to ensure that it can be linked to specific taxpayers (for example, such as capturing additional data or changing the format of existing data that had been captured in order to ease the extraction process);  any tax acts or legal aspects should be enhanced to ensure all relevant taxpayer information is available from a specific third party; and  both organisations (SARS and the third party) have the relevant information technology to ensure SARS can extract, store and manipulate the data in a timely fashion in order to obtain the maximum effect. In conclusion, a new feasibility framework was developed as part of this study in order to aid SARS with the reduction of the taxation gap by using third-party data and information technology. The purpose of the new feasibility framework is to identify whether there is third-party data available and whether any changes are required to the data in order to provide SARS with a mechanism to link it to specific taxpayers. This will provide SARS with guidance as to the steps that are required in order to automate the process of collecting third-party data through by using information technology. The feasibility framework would also indicate whether it is feasible to continue with such an automation project before exhausting too many resources without any significant effect on reducing the taxation gap. / Taxation / M. Phil. (Accounting Science)

This study investigated and examined the effectiveness and implementation of the existing internal controls designed specifically for exempted micro-enterprises (EMEs) contracting with the South African Social Security Agency (SASSA), in order to minimise the risk of possible tax evasion within the supply-chain management (SCM) processes. The research was completed by conducting a document review and face-to-face interviews with SASSA‟s SCM practitioners, risk manager, fraud and corruption manager, internal-control manager and internal auditor in order to identify risks of possible tax evasion within the SCM processes. It was concluded that there is a risk of possible tax evasion within the SCM processes due to the ineffectiveness and inconsistent implementation of internal controls designed for EMEs contracting with SASSA. This risk could be minimised by incorporating possible anti-tax-evasion procedures in the risk-assessment process, and ultimately in SASSA‟s broader fraud and corruption strategies. Such procedures should then help minimise funds being lost to the fiscus due to tax evasion in the SCM processes. / Taxation / M. Phil. (Accounting Sciences)

Taxation statutes often provide opportunities for tax avoidance by taxpayers who exploit the provisions of the taxing statute to reduce the tax that they are legally required to pay. It is, however, important to distinguish between the concepts of tax avoidance and tax evasion. The central issue, especially where the contract has no business purpose, is whether it is possible for the substance and legal form of the transaction to differ to such an extent that a court of law will favour the substance rather than the legal format. The debate is whether the courts should be encouraged to continue with their "judge-made" law or whether the tax jurisdictions should be supporting a legislative route as opposed to a judicial one, in their efforts not only to combat tax avoidance but also to preserve taxpayer certainty. The question is whether the Doctrine of "Substance over Form" as applied by the judiciary is effective in combating tax avoidance, or whether a legislated general anti-avoidance provision is required. An intensive literature survey examines the changes which have occurred in the application of judicial tests from the 1930's to date and investigates the different approaches tax jurisdictions follow in order to combat tax avoidance. The effect of the introduction of anti-avoidance provisions in combating tax avoidance is evaluated by making a comparison between the United Kingdom and South Africa. [n the United Kingdom, the courts are relied on to create anti-tax avoidance rules, one of which is the Doctrine of "Substance over Form". The doctrine is very broad and identifies various applications of the doctrine, which have been developed by the courts. In South Africa, the Doctrine of "Substance over Form" has been applied in certain tax cases; however the South African Income Tax Act does include anti-tax avoidance sections aimed at specific tax avoidance schemes, as well as a general anti-tax avoidance measure enacted as section 103. The judicial tests have progressed and changed over time and the introduction of anti-avoidance legislation in the Income Tax Act has had an effect on tax planning opportunities. A distinction needs to be made between fraudulent and bona fide transactions while recognising the taxpayer's right to arrange his or her affairs in a manner which is beneficial to him or her from a tax perspective. Judicial activism and judicial legislation in the United Kingdom has created much uncertainty amongst taxpayers and as a result strongly supports the retention of a general anti-avoidance section within an Income Tax Act. A general anti-avoidance provision, following a legislative route, appears to be more consistent and effective in combating tax avoidance.

The main aim of the dissertation thesis is a case of the right deduct to input VAT which let companies to be involved into carousel frauds. The thesis analyses the related cases and examines in which conditions it may be legitimate to entitle the right to deduct recognize and when it is not. It also discusses the possible ways how to deal safely with partners. Moreover, it also examines which steps need to be taken into the consideration to reduce tax evasion on VAT which have been done recently in the Czech Republic.

The additional tax ("penalties") imposable in terms of section 76(1) of the Income Tax Act (No 58 of 1962) when a taxpayer is in default, can be very harsh (up to 200% of the tax properly chargeable). The Commissioner may, in terms of section 76(2)(a), remit any penalty imposed, as he sees fit. However, when there was intent on the part of the taxpayer to evade the payment of tax, the Commissioner may not remit any portion of the 200% penalty imposable, unless he is of the opinion that "extenuating circumstances" exist. This dissertation examines the meaning of "extenuating circumstances", as interpreted by the judiciary, and lists the factors and defences that a taxpayer may plead to justify a remission of penalties, both in the case of an intention by the taxpayer to evade tax and in cases where the taxpayer is merely in default of section 76(1). / Accounting / MCOM (Accounting)