The diploma thesis focuses on the concept of CCCTB, its historical development and the application of the allocation formula for the division of the common consolidated corporate tax base. At the beginning is the attention paid to coordination and harmonization within the European Union. Subsequently, the work is concerned with the proposal itself. It describes proposal from 2011 and its methods for determining the tax base, its consolidation and its distribution among the members of the group. The 2011 proposal is compared with two new proposals from 2016 - the CCTB and the CCCTB. More detailed descriptions of significant differences are described. The last chapter of the thesis then calculates the distribution of the consolidated base in the conditions of the selected company.

Evolutionary stability is a necessary condition for imitative dynamics of policy learning and innovation to come to a rest. We apply this concept to profit tax competition in a regime where a common and consolidated profit tax base for multi-jurisdictional firms is divided among governments by means of formulary apportionment. In evolutionary play, governments exhibit aggregate-taking behavior: when comparing their performance with others, they ignore their impact on the consolidated tax base. Consequently, evolutionarily stable tax rates are less efficient than tax rates in best-response tax competition. / Series: WU International Taxation Research Paper Series

The aim of my thesis is through comparative analysis find the differences between the newly proposed CCCTB directive and corporate income tax systems of France, Germany and Great Britain. The work is mainly focused on the comparison method of depreciation, access to inventory, the amount of corporate tax and transfer of tax losses. Although each system has its tax certain specifics, one would assume that the authors of the proposed directive let themselves be inspired by the strong states of the European Union. However, the final chapter of my thesis shows, that the majority of monitored items was not affected by these states.

Efter ett 10 årigt arbete mot att harmonisera direkt beskattning inom EU har Kommissionen lagt fram ett förslag till direktiv avseende en gemensam konsoliderad bolagsskattebas (CCCTB). Syftet med förslaget är att företag som bedriver gränsöverskridande verksamhet endast ska behöva följa en regeluppsättning samt arbeta gentemot en skattemyndighet. Tanken är att resultaten från alla koncernens bolag inom EU slås samman och sedan portioneras ut till koncernföretagen genom en fördelningsnyckel. Kommissionen har angivit att konsolideringen ska medföra att medlemsstaterna kan konkurrera på lika villkor och att fördelningen av skattebasen ska ske rättvist mellan medlemsstaterna. Det finns medlemsstater som är osäkra på förslagets konsekvenser och medlemsstaternas konkurrensmöjligheter efter förslagets antagande. Därav, är syftet med uppsatsen att utreda om fördelningsnyckeln i förslaget medför att skattebasen fördelas rättvist mellan medlemsstaterna genom att medlemsstaterna har möjlighet att konkurrera på lika villkor på den inre marknaden. Fördelningsnyckeln består av tre komponenter; arbetskraft, tillgångar och försäljning. Den gemensamma skattebasen portioneras ut till företagen i relation till företagets andel av koncernens totala andel av komponenterna. Därefter har medlemsstaterna rätt att beskatta andelen tillhörande företagen etablerade i medlemsstaten med den nationella skattesatsen. Uppsatsen innehåller en analys avseende de beståndsdelarna i fördelningsnyckelns komponenter som kan tänkas påverka medlemsstaternas möjlighet att konkurrera på lika villkor. Uppsatsen diskuterar hur beståndsdelarna påvekar konkurrensen samt i vissa fall ges förslag på förändringar som kan leda till att komponenten medför att medlemsstaterna kan konkurrera på lika villkor och därmed erhålla en rättvis fördelning av skattebasen. / After 10 years of work towards harmonization of direct taxation within EU the Commission has proposed a directive on a common consolidated corporate tax base (CCCTB). The aim of the proposal is that companies who engage in cross-border activities only need to comply with one set of rules and work towards one tax authority. The idea is that the result from all companies inside EU within the group should be pooled and then portioned out to the individual companies through an allocation formula. The Commission has stated that the consolidation shall result in that member states can compete on equal terms and that the tax base is apportioned fairly between the member states. However, there are member states that are doubtful of the consequences of the proposal and the member states competitive opportunities after the adoption. Therefore, the aim of this paper is to examine if the allocation formula in the proposal result in that the tax base are apportioned fairly between the member states through the member states possibility to compete on equal terms within the internal market. The formula for apportionment consist of three components; labor, assets and sales. The common tax base will be portioned out to the companies in relation to the share of the company compared to the total share of the group of each component. Then, the member states have the right to tax the share that belongs to the companies that are established within the member state with the national tax rate. The thesis contains an analysis of the elements in the components of the allocation formula that could affect the opportunity of the member states to compete on equal terms. The thesis discusses how the elements affect the competition and in certain cases suggestions of changes in the elements are given that could lead to that the component result in that the member states can compete on equal terms and thereby hold a fair share of the tax base.

The thesis deals with finding definition characters of agents as permanent establishments (dependent agents) available from publicly accessible sources, including its negative definition in comparison with the concept of an independent agent. The second part of the thesis analyses all possible and suggested ways of tax base creation, i.e. application of substitute methods of profit assessment and tax base enumeration from accounting profit or difference between revenues and expenses. Further this part of the thesis focuses on the issue of appropriateness of the Proposal for a Council Directive COM(2011) 0121 of 16 March 2011 on a Common Consolidated Corporate Tax Base (CCCTB) for dependent agent's purpose. Used methods include analogy, analysis, synthesis, deduction and comparison.

Formulary apportionment is an intensively debated mechanism for allocating tax base within multinational groups. Systems under which the formula is identical in all jurisdictions and systems under which jurisdictions can determine the weights on the formula factors individually can be observed. The latter systems produce uncertainty about the overall tax-liable share of the future group tax base. Counter-intuitively, I identify scenarios under which increased uncertainty leads to higher expected future group income. My results provide helpful insights for firms and policy makers debating the specific design of a formulary apportionment system. (author's abstract) / Series: WU International Taxation Research Paper Series

In March 2011, the European Commission submitted a proposal for a Council Directive on an optional common consolidated corporate tax base (CCCTB). If this proposed CCCTB system comes into force, taxes calculated under the currently existing system of separate accounting might be replaced by a system of group consolidation and formulary apportionment. Then, multinational groups (MNGs) would face the decision as to whether to opt for the CCCTB system. Prior research focuses mainly on the differences in economic behaviour under both systems in general. By con-trast, we study the conditions under which one or the other tax system is preferable from the per-spective of an MNG, with a particular focus on loss-offsets. We identify four effects that determine the decision of an MNG: the tax-utilization of losses, the allocation of the tax base, the dividend and intragroup interest taxation. We find mixed results, e.g., that the CCCTB system proves ad-vantageous for increasing loss/profit streams (e.g. from start-ups or R&D projects) of the individual group entities, whereas the system of separate accounting is beneficial for decreasing profit/loss streams (e.g. caused by a decrease in return from a mature product). The results of our analysis are helpful for MNGs facing the decision as to whether to opt for the CCCTB system and can also support legislators and politicians in the EU but also in other regions in their tax reform discussions. (authors' abstract) / Series: WU International Taxation Research Paper Series

Im Zuge der Diskussion einer Harmonisierung der Ertragsbesteuerung innerhalb der Europäischen Union wird bereits seit geraumer Zeit die Einführung einer gemeinsamen konsolidierten Körperschaftsteuerbemessungsgrundlage (GKKB/CCCTB) von den Mitgliedsstaaten der Europäischen Union in Erwägung gezogen. Bereits im Jahr 2001 wurde die Möglichkeit einer grenzüberschreitenden Besteue-rung europaweit tätiger Konzerne von der Europäischen Kommission erwähnt. In den darauf folgenden Jahren wurde die Ausgestaltung einer G(K)KB sowohl auf politischer Ebene als auch in der Literatur fortwährend weiterentwickelt. Eine Reform der Unternehmensbesteuerung ruft regelmäßig Änderungen des Steueraufkommens in den betroffenen Nationalstaaten hervor und führt häufig zu einer Veränderung der Kosten zur Befolgung steuerlicher Gewinndeklarationspflichten. Ferner können Steuerreformen zu Verhaltensreaktionen der Steuerpflichtigen an die geänderten steuerlichen Rahmenbedingungen führen. Beispielsweise kann das Investitionsverhalten oder die Finanzierungsstrategie beeinflusst werden. Vor diesem Hintergrund wird im Rahmen des ersten Beitrags untersucht, welche Verhaltensreaktionen auf Seiten der Steuerpflichtigen in Bezug auf die Wahl des Besteuerungsregimes, das Investitionsverhalten und Steuerplanungsaktivitäten bei Einführung einer optionalen GKKB zu erwarten wären. Ziel des zweiten Beitrags ist eine Ermittlung möglicher Aufkommenskonsequenzen, die sich bei der Einführung einer gemeinsamen Körperschaftsteuerbemessungsgrundlage (GKB/CCTB) oder gemeinsamen Unternehmenssteuerbemessungsgrundlage (GUB) für den deutschen Staatshaushalt ergeben würden. Neben der Ermittlung des Gesamteffekts wird zusätzlich die Bedeutung der Änderung einzelner steuerlicher Gewinnermittlungsvorschriften (zum Beispiel Abschreibungsvorschriften) auf die Gesamtänderung des Steueraufkommens untersucht. Darüber hinaus wird analy-siert, in welchem Umfang die Gewinnermittlungsvorschriften der GKKB im Vergleich zum gegenwärtigen deutschen Steuerrecht Veränderungen der steuerlichen Befolgungskosten hervorrufen. Gegenstand des dritten Beitrags ist eine Auseinandersetzung mit der weniger in der Literatur, sondern vielmehr der allgemeinen Diskussion anzutreffenden Kritik an der Nutzung ökonomischer Experimente zur Untersuchung von Fragestellungen mit Bezug zur Unternehmensbesteuerung. Die Kritik beruht darauf, dass die Ergebnisse ökonomischer Experimente aufgrund fehlender externer Validität nicht auf reales Verhalten übertragen werden könnten. Der Mangel an externer Validität wird damit begründet, dass ökonomische Experimente häufig mit Studierenden durchgeführt werden und diese nicht mit den relevanten steuerlichen Vorschriften vertraut sind. Vor diesem Hintergrund ist das Ziel des dritten Beitrags darin zu sehen, einen me-thodischen Beitrag zu leisten, geeignete Probandengruppen sowie effiziente experi-mentelle Design zur Untersuchung von Fragestellungen mit einem ertragsteuerlichen Fokus zu identifizieren.

EU har under lång tid sökt lösa de problem som finns på den inre marknaden avseende direkt beskattning. En rad riktade åtgärder har förverkligats genom praxis. Jämte riktade åtgärder har även kommissionen arbetat med en långsiktig lösning där bolag ska ges möjlighet att använda sig av en gemensam bolagsskattebas för hela unionen. Den 16 mars 2011 presenterade kommissionen slutligen ett förslag till direktiv om en gemensam konsoliderad bolagsskattebas.

The draft for a Common Consolidated Corporate Tax Base Directive in the European Union includes the suggestion for an apportionment formula which allocates taxable group profits to group member corporations. These allocated profits shall then be taxed in the respective Member States. The draft directive delegates the right to define one factor of the apportionment formula, the term "Employee" to the Member States, who are therefore free to choose a narrow or a broad definition, the latter including also atypical employment schemes. Using a game-theoretic approach the paper shows that the individually rational strategy of any Member State to define "Employee" broadly so as to maximize the volume of the apportionment factor and thus maximize the allocated share of taxable income is only the best solution when tax rate differences and differences in the volume of atypical employment schemes are disregarded. If such differentials and the corporate groups' reactions to different Member States' definitions are included in modelling the game's pay-offs a narrow definition of "Employee" yields the highest individual pay-offs to the Member States involved. This change of dominant strategies is triggered by the corporate group's shifting of the employment factor from high-tax to low-tax Member States. Our paper differs from previous research on the economic effects of the CCCTB apportionment formula as it is the first paper identifying and analysing the employment factor and its distorting effects. The paper discusses possible tax minimizing strategies for corporate groups by shifting workforce and develops a model to quantify these potential relocations. Furthermore the paper presents advice to policy makers in their "Employee" definition decision and shows how Member States could use this definition to both minimize outward factor shifting and maximize inward factor shifting.(authors' abstract) / Series: WU International Taxation Research Paper Series