本研究旨在探討我國最新建立之反資本弱化稅制對跨國集團整體稅負之影響，並欲指出跨國公司在未來租稅規劃上應注意之事項。透過對國內外資本弱化相關案例，以及其他實務上可能產生稀釋資本議題之操作模式做個案研究，希望能夠發現在此稅制之下可能存在之問題與風險。 本文共分為五章，概述如下： 第一章：說明本研究之研究動機、欲探討之問題、擬採用之研究方法以及本研究架構。 第二章：分別針對資本弱化之理論架構、相關稅收議題，以及各國反資本弱化稅制之國內外文獻進行回顧及探討。 第三章：介紹並整理我國反資本弱化稅制中之各類法條、辦法及函令。 第四章：案例研究，以虛擬案例及實務上產生爭議之個案為研究對象，俾對我國未來稅捐稽徵機關在稽徵實務上及納稅義務人在租稅規劃上提出建議。 第五章：就前述討論內容做出結論，並嘗試對我國反資本弱化稅制提出具體之建議，以期做為未來研究者之參考。 / This essay focused on the newly enacted anti-thin capitalization regulation in Taiwan and its possible impact on multinational corporations in tax aspect. By studying on cases related to thin capitalization and other possible issues, this essay would like to discover the potential drawbacks and risks in the anti-thin capitalization regulation. This essay comprises five chapters. Summarizes as follows: Chapter 1: To explain motives, structure and methodologies of this research. Chapter 2: First, to introduce the definition of thin-capitalization made by OECD, and to explain the Modigliani-Miller Theory, which was the rationale of Thin Capitalization. Secondly, to collect and analyze the possible tax issues of thin capitalization, and to introduce the legislative conditions of anti-thin capitalization in regulations in main countries. Chapter 3: To briefly introduce the newly enacted anti-thin capitalization regulation. Also, this essay would like to debate on main issues and potential drawbacks in this regulation. Chapter 4: To study on an assumed example and other cases that show the common model of thin-capitalization and possible impacts result from anti-thin capitalization regulation on multinational corporations. In this part, the essay would like to give some suggestions to tax authority and tax payers. Chapter 5: To summarize the main contents from the forenamed chapters, in addition, to cite the potential risks and shortcomings of the anti-thin capitalization regulation.

It has long been known that companies can finance themselves with the help of equity or debt. Since Modigliani and Miller’s theories of capital structure and its impact on performance, several studies have continued to investigate the phenomenon of capital structure. Using previous research on capital structure as well as the irrelevance theory, trade-off theory and pecking order theory, researchers are constantly examining how capital structure affects companies, what affects the capital structure, and which financing is best suited for their specific company.This study intends to investigate how the capital structure is affected by companies’ profitability, growth, and economical cycle fluctuations in Sweden. The study examines Swedish companies listed on the Nasdaq Main Market Stockholm in the branch of industry, raw materials and real estate. The study sample consists of 109 companies that are examined over a ten-year period between 2010-2019. The study conducts regression analyzes of key ratios’ debt / equity ratios as a dependent variable, as well as ROE, ROA, profit margin, turnover growth, employment growth and GDP gaps as independent variables.The study concludes that cyclical fluctuations affect companies’ capital structure in the branch of industry. However, it could not be ensured that cyclical fluctuations affect companies in the raw materials industry or the real estate industry. The study measured that ROA correlates negatively with the capital structure of the branch of industry, as well as the real estate industry. Significance for the variable profitability measured with ROA could not be demonstrated. The variable ROE was only significant for the real estate, industry and positively correlated with the debt-equity ratio. Profit margin was significant and positively correlated for the branch of industry, and it was also identified that the profit margin was significant for the real estate industry, but the results were negligible. The same negligence was discovered for the significant variable for sales growth for the raw materials industry, while no significance was achieved for the branch of industry and the real estate industry. Finally, the variable employment growth was only significant for the real estate industry, where a positive correlation was shown with the debt-equity ratio. / Det är länge känt att företag kan finansiera sig med hjälp av eget kapital eller belåning.  Sedan Modigliani och Miller teorier om kapitalstruktur och dess påverkan på resultatet har flertal studier fortsatt undersökt fenomenet kapitalstruktur. Med hjälp av tidigare forskning om irrelevansteorin, trade-off teorin och pecking order teorin undersöker forskarna ständigt om hur kapitalstruktur påverkar företagen, vad som påverkar kapitalstrukturen, samt vilken finansieringsmetod som är bäst lämpad för sitt specifika företag.Denna studie avser att undersöka hur kapitalstrukturen påverkas av företagens lönsamhet, tillväxt, samt konjunktursvängningarna i Sverige. Studien undersöker svenska företag noterade på Nasdaq Main Market Stockholm i branscherna industri, råvaror och fastighet. Studiens urval består av 109 företag som undersöks under en tioårsperiod mellan 2010-2019. Studien genomför regressionsanalyser på nyckeltalen skuldsättningsgrad som beroende variabel, samt ROE, ROA, vinstmarginal, omsättningstillväxt, anställningstillväxt och BNP-gap som oberoende variabler.Studien kommer fram till att konjunktursvängningar påverkar företagens kapitalstruktur i industribranschen. Det kunde inte säkerställas att konjunktursvängningar påverkar företag i råvarubranschen eller fastighetsbranschen. Studien uppmätte att ROA korrelerar negativt med industri- och fastighetsbranschens kapitalstruktur. Det kunde inte uppvisas signifikans för lönsamhetsvariablerna för ROA. ROE var enbart signifikant för fastighetsbranschen och korrelerade positivt med skuldsättningsgraden. Vinstmarginal var signifikant och positiv korrelerade för industribranschen, det identifierades även att vinstmarginalen var signifikant för fastighetsbranschen, men resultat var försumbart. Samma försumbarhet upptäcktes för den signifikanta tillväxtvariabeln för omsättningstillväxt för råvarubranschen, medan det inte uppnåddes signifikans för industribranschen och fastighetsbranschen. Slutligen var tillväxtvariabeln för anställningstillväxt enbart signifikant för fastighetsbranschen där det uppvisades en positiv korrelation med skuldsättningsgraden.