This thesis deals with the relationship between accounting and corporate income tax, it explains their different purposes and the way of control from the national and international point of view. The analysis of several countries shows the possible levels of cohesion of the accounting and tax system. Then the advantages and disadvantages of their close connection are discussed. The following part of the thesis describes the problems of calculation of the tax base from the trading income taken from accounting. Great attention is given to the tax deductible expenses and their minimisation (tax optimization). The final section is occupied with the principle of tax payable and deferred tax.

There is a reasonable amount of literature and discussions among scholars on the effect of host country corporate taxation on the inflows of foreign direct investment (FDI). This study is an attempt to analyse this effect in 25 high income OECD countries over the period of 1996 until 2009. The main objective of the paper is to prove statistically whether there is significant and negative relationship between the inflows of FDI and corporate taxation in the selected sample of OECD countries during the specified time span. This relationship is investigated with OLS regression analysis with pooled panel data to find to what extent the selected explanatory variable effective tax rate (ETR) along with trade openness, long term interest rate, share of internet users and labour cost have an impact on the dependent variable - FDI relative to GDP. Finally, it is proved that the elasticity between corporate taxation and FDI is positive at a level below the average effective tax rate and negative above the average level of effective tax rate. In addition, all other important variables included in the regression model are found to be significant determinants of FDI. The study is based on relevant literature and the statistical analysis is made in regard to the models described in scientific articles in the paper.

Corporate income taxation has a profound impact on economic behavior in the United States. This dissertation focuses on two aspects: the impact of dividend taxation on investment and the impact of corporate income tax exemption on nonprofit organizations activity. The first essay compares dividend payout ratios of C and S corporations to test the validity of the traditional and the new views on dividend taxation. Average corporate income tax rate is used as an instrumental variable. The results support the traditional view. The second essay focuses on whether the exemption of nonprofit organizations from the corporate income tax affects the competition between for-profit and nonprofit hospitals. Time series and panel data analysis show that tax subsidies to nonprofit organizations have a positive impact on nonprofit hospitals market share.

O imposto de renda, em seus mais variados aspectos e particularidades, tem se mostrado um dos temas mais complexos e debatidos pela doutrina especializada e pelos tribunais ao redor do mundo. No Brasil, jurisdição em que o Sistema Tributário Nacional encontra-se ampla e rigidamente arquitetado pela Constituição Federal, o tema ganha especiais contornos, dada a necessidade de fiel compatibilidade entre a legislação infraconstitucional e os limites minuciosamente desenhados pelo constituinte. A presente pesquisa pretende entrar nessa seara para abordar o intrigante binômio aspecto material e base de cálculo do imposto de renda das pessoas jurídicas. No que tange ao aspecto material, investigaremos o grau de influência da rigidez do Sistema Constitucional Tributário sobre a composição dos elementos que caracterizam a renda constitucionalmente tributável. Nesse mister, será necessário discorrer sobre as teorias que propugnam pela ampla liberdade do legislador infraconstitucional para estabelecer o significado de renda (teoria legalista) até aquelas que apontam pouca (ou nenhuma) autorização para construção do conceito de renda no âmbito infraconstitucional, eis que isso seria matéria eminentemente constitucional. E assim se fará para que, posteriormente, viabilize-se o cotejamento entre a renda constitucionalmente tributável e o lucro contábil apurado de acordo com a legislação societária, eis que, tradicionalmente, é esse o ponto de partida para a apuração da base de cálculo do imposto de renda das pessoas jurídicas. Para tanto, será preciso analisar as funções e os usuários da contabilidade, identificando a atual perspectiva e os critérios que guiam a elaboração dos relatórios contábeis. Feito isso, tratar-se á de responder a seguinte indagação: poderia o legislador tributário brasileiro adotar o modelo de dependência total, isto é, adotar o lucro contábilsocietário como base de cálculo do imposto de renda das pessoas jurídicas sem nenhuma correção ou limitação no seu processo de determinação, como acontece em alguns países? Em última análise, analisar-se-á criticamente se o lucro contábil, juridicizado que foi pelo Direito Societário e Tributário, confirmaria ou infirmaria o aspecto material do indigitado tributo a teor do Texto Magno. / The income tax, in its various aspects and particularities, can be considered as one of the most complex and discussed issues by specialized doctrine and courts around the world. In Brazil, a jurisdiction that the National Tax System is comprehensive and almost tightly provided by the Federal Constitution, the issue gains special contours, specially about the compatibility between ordinary legislation and the limits provided by the constituent. This study intends to going through in this matter in order to discuss the intriguing binomial taxable event (material aspect of taxable event) and taxable basis of corporate income tax. Regarding to the taxable event, this study will investigate the influence of the Constitutional Tax System on the composition of the elements that characterize the constitutionally taxable income. At this point, it will be necessary discuss the theories that advocate the wide freedom of ordinary legislature to establish the significance of income (legalistic theory) and those theories that advocate little (if any) authorization to construct the concept of income by ordinary legislature under the argument that this matter would be eminently constitutional. And it will be done in order to make possible the comparison between constitutionally taxable income and accounting income determined in accordance with Brazilian corporate legislation, behold, traditionally, it is the starting point for calculating the taxable basis for corporate income tax purposes. For that, we will need to analyze the functions and users of accounting, identifying the current perspective and criteria that guide the preparation of financial reports. After this, we will be able to answer the following question: could the Brazilian legislature adopt the tax total dependency model, i.e., the corporate accounting as the taxable basis for corporate income tax without any correction or limitation on your determination process, as happens in some jurisdictions? In essence, this study intends to perform critical analysis of if the accounting profit, which was provided for Corporate and Tax Law purposes, confirm (or not) the taxable event provided by Federal Constitution.

A União, na qualidade de usuária da informação contábil, utiliza o lucro contábil como base para definir a renda a ser tributada das pessoas jurídicas: trata-se do lucro real, nos termos da legislação do Imposto de Renda da Pessoa Jurídica (IRPJ). Tendo em vista a complexidade inerente à atividade contábil, o legislador determinou que para certas situações seria necessária uma opção mais simples para se apurar a renda de algumas pessoas jurídicas e o lucro presumido foi a forma escolhida a ser aplicada. Consiste em presumir que a renda é um percentual aplicado sobre a receita operacional, acrescido de outros ganhos. Tal opção, desde a sua criação ocorrida há mais de 65 anos, gerou uma oportunidade para os contribuintes escolherem o regime de tributação mais vantajoso, ou seja, aquele em que o encargo tributário fosse menor; para isso, bastaria escolherem a opção em que a renda fosse menor e, conseqüentemente, estariam optando pelo regime mais vantajoso. A Contribuição Social sobre o Lucro Líquido (CSLL), criada em 1988, foi uma forma de ser aumentada a arrecadação tributária da União mantendo-se relativamente constante a arrecadação do montante de tributos incidentes sobre a renda, visto que o produto da arrecadação da CSLL não é compartilhado com Estados e Municípios como ocorre com o IRPJ. Juntamente com a legislação dessa contribuição, surgiu um regime em que o contribuinte que optasse pelo lucro presumido, automaticamente, estaria vinculado a uma forma semelhante de tributação da CSLL. Tal situação fez com que o contribuinte, ao optar pelo regime do lucro presumido tivesse de levar em consideração os efeitos que essa decisão provocaria no cálculo da CSLL. Até o ano de 2002, a decisão de se optar pelo lucro presumido não influenciava a quantia a ser paga relativamente aos outros tributos, porém, no final de 2002, entrou em vigor a contribuição para o Programa de Integração Nacional (PIS) na forma não-cumulativa, com base de cálculo e alíquotas definidas de acordo com a opção ou não pelo regime do lucro presumido. À semelhança dessa forma de tributação, no ano seguinte, nasceu a Contribuição para Financiamento da Seguridade Social (COFINS). Esse tratamento vinculado dado aos quatro tributos tornou mais complexa a decisão em se optar ou não pelo lucro presumido. O presente trabalho equacionou a totalidade de tributos apurados segundo os regimes de tributação do lucro real e do lucro presumido para cada setor de atividade, obtendo as relações entre receitas e despesas em que a opção pelo lucro presumido ou real é indiferente. Dessa forma, situando-se as receitas e despesas da pessoa jurídica com relação a essa fronteira, torna-se possível decidir se o administrador deve ou não optar pelo lucro presumido. Subsidiariamente, foi possível constatar que, no que se refere aos aspectos tributários, não é interessante manter nas empresas aplicações financeiras que representem estoque de capital, pois essa situação acarretará pagamento de tributos em valor maior se comparado com esse capital de posse dos sócios, pessoas físicas. / The Federal Government, as the user of accounting information, uses the accounting profit as the base to define the taxable income of corporations: it is the actual profit, as defined in the Corporate Income Tax (IRPJ) regulations. Due to the complexity inherent to the accounting activity, the lawmakers have established that, in certain situations, a simpler option would be required to assess the income of certain corporations, and the assumed profit was the method chosen, which consists of assuming that the income is a percentage applicable to the operating income, including other gains. Since its creation over 65 years ago, said option has provided taxpayers an opportunity to choose the most beneficial taxation regime, i.e., the regime providing the lowest tax rate; to do so, companies simply had to choose the option where the income was the lowest, consequently the most beneficial regime. The Social Tax on Net Profits (CSLL), created in 1988, was a method found by the Government to increase the Federal tax revenue, keeping relatively constant the amount of taxes applicable to the income, since the CSLL revenue is not shared with the States and municipalities, as is the case with the Corporate Income Tax. In conjunction with the regulation for this tax, a new taxation regime was created, where the taxpayer that opted for the assumed profit would be automatically bound to a taxation form similar to the CSLL. This situation made the taxpayer opting for the assumed profit regime to consider the effects of said options on the calculation of the CSLL. Until 2002, the decision for choosing the assumed profit regime did not impact the amount payable against other taxes; however, in late 2002, the non-cumulative contribution to the PIS (Employees\' Profit Sharing Program) was established, with calculation basis and rates defined according to whether the assumed profit regime was chosen or not. Similarly to this the Social Security Funding Tax (COFINS) was created. This combined treatment of the four taxes has added complexity to the decision for choosing the assumed profit or not. This paper has summed up the taxes assessed according to the actual profit and assumed profit taxation regimes for each industry, establishing the revenue/expense rates where the option for assumed or actual profit is immaterial. Thus, by measuring corporate revenues and expenses against this benchmark, it is possible to decide whether managers should opt for the assumed profit regime or not. Additionally, we could observe that, concerning taxation aspects, it is not advantageous for companies to keep investments that represent capital stock, since this scenario would entail higher taxes compared to capital owned by individual partners.

The diploma thesis examines tax competition between Croatia and its neighbouring countries- Hungary, Slovenia, Bosnia and Herzegovina and Serbia- based on corporate income tax. After first theoretical part focused on tax harmonization, coordination and competition, the paper continues with describing systems of the corporate income tax for each country. Subsequently the practical part follows with analysis of tax competition from corporate tax perspective using time and space comparison. Final conclusion of the thesis is that Croatia, respecting corporate income tax, is highly competitive location in comparison with analyzed neighbouring countries.

The aim of this thesis is to describe in detail the issue of accounting treatment for income tax of legal persons in accordance with current accounting and tax legislation. For a comprehensive understanding of the theory display the corporate accounting is appropriate to first deal with the two systems separately and only then proceed to define the operating results, respectively. tax base as one of the bridges connecting the two systems. Transformation operating results for the income tax base is outside the corporate accounting. Information provided by accounting systems are the most important basis for the determination of the tax at the entity. An integral part of this thesis is a detailed description of the accounting operations, which may be an entity in relation to tax corporate income to meet during the accounting, respectively. period. For clarity, the final part includes practical examples of application of the tax accounting theory.

The diploma thesis focuses on tax evasion in the context of corporate income tax. The first chapter describes the actual tax system in the Czech Republic and introduces the changes that have occurred since 2014. Following chapter describes the structure of the corporate income tax. Shows basic techniques for transforming operating result to the tax base and then adjustment of tax base through tax allowances and deductions. The reader will also read about the tax rates, tax credits and advance tax. The third chapter introduces two important terms: tax optimization and tax evasion. The aim of the fourth chapter is to demonstrate the areas in which taxpayers may tax evasion. These areas are mainly depreciations, reserves, repairs, technical evaluation and others. Text first describes legislative regulations, contains practical illustration for example from judgments of the Supreme Administrative Court. As the fight against tax evasion can not be solved only in one country, it is necessary international cooperation, which is briefly explained in the last chapter. It introduces with present and future plans to combat this illegal activity not only within the European Union but also in other international organizations.

The diploma thesis describes in the first part the process of calculation of corporate income tax basis from the accounting profit and subsequently the calculation of corporate income tax according to the actual valid legislation in Czech republic. In second part the diploma thesis discusses the tax optimalization perfomed by companies which is actually significant problem for lots of states. On the concrete examples are described possible ways of tax optimalization related to both small and middle size enterprises and holding companies operated globally.

The Diploma thesis deals with the tax optimization and tax evasion relating to corporate income tax from the perspective of business entities who keeps accounts. Specifically, it is based on the legislation in force for the Czech Republic and is focused on the transformation process of accounting profit to the tax base of corporate income tax and the related possibilities of tax optimization or tax fraud. First chapter defines corporate income tax, its position in the tax system and the principle of its calculation. Historical development of corporate income tax and main changes of related regulations in 2013-15 have also been introduced in this chapter. Second chapter deals with tax evasion. Beside its definition, causes and measurement methods it also presents statistical data relating to tax audits and tax offenses. Last chapter of the thesis introduces the most common expenses and revenues whose tax deductibility or non-deductibility influences the calculation of corporate income tax. This chapter also introduces practical examples of tax evasion which were solved by the Supreme Administrative Court.