本研究探討我國反資本稀釋稅制在國際會計準則導入後之影響，並以各國目前對於金融工具應分類為負債或權益的規定，以及相對應之股利收入與利息收入課稅方式，了解各國對防止自有資本稀釋的規範，並提出因應國際會計準則導入，我國之反自有資本稀釋條款的可能調整方向。 研究結果分為兩部分：在各國相關稅制上，主要以固定比率法作為反避稅的方法，而美國與德國則以盈餘減除法計算超額利息，英國藉由常規交易原則判斷經濟實質；導入國際會計準則影響上，主要係因具有融資性質的融資租賃分類標準從我國會計準則的規則基礎轉換為國際會計準則的原則基礎，而產生租賃交易的分類變動。另外金融工具在國際會計準則下以該工具的經濟實質予以分類，也與我國過去規定不甚相同，例如特別股、可贖回公司債或附賣回權之金融工具等。此外，對於關係人的認定方式，我國目前現行反自有資本稀釋法規亦與國際會計準則之範圍不同。這些項目在導入IFRS皆有稅法適用上是否配合改變之問題須待釐清。 / This study focused on thin capitalization rules and the impacts of adopting IFRS. It also emphasized the classification of debt and equity instruments of foreign countries, as well as the taxation issues of dividend and interest revenue, to introduce thin capitalization rules of other countries, and the available adjustment of Taiwanese thin capitalization regulation as to respond the adoption of IFRS. The conclusions of this study are divided into two parts. The first part is for other countries’ related regulations. Most countries employ fixed debt/equity ratio approach as the way of anti-avoidance. United States and Germany employ earnings stripping rules approach, while United Kingdom use arm’s length approach. The second part is for the impacts from adoption of IFRS. The impacts are mainly from finance lease and financial instruments’ classification due to the transfer from rule-based to principle-based under IFRS. In addition, financial instruments may have to reclassify with the economics substance, such as preferred stock, callable bonds, and puttable bonds, which are different from Taiwanese original rules. The definition and scope of related party in IFRS are also different and should be clarified.

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.