所得稅變革及盈餘管理對企業租稅規劃之影響：公司治理角色

The Effects of Income Tax System Reform and Earnings Management on Tax Planning: The Role of Corporate Governance

汪瑞芝(Jui-Chih Wang) ； 許明智(Ming-Zhi Hsu)

《中華會計學刊》 12卷2期 (2016/12) Pp. 267-314

https://doi.org/10.6538/TAR.2016.1202.03

摘要

本文探討我國所得稅制改革、盈餘管理及公司治理對有效稅率之影響；研究結果顯示，2010 年營所稅率由25% 下降至17%，因直接受惠於營利事業，大幅減輕企業租稅負擔，降低其有效稅率。再者，本文以裁決性應計數代理盈餘管理行為，研究結果顯示裁決性應計數愈大時，以降低租稅負擔為目的之盈餘管理行為愈大，將使得公司有效稅率下降。最後，本文探討良好的公司治理機制是否能有效減少管理階層不當盈餘管理行為，進而增加企業有效稅率；實證結果發現，機構投資人持股率愈高時，因實際參與企業營運的人愈多且專業程度愈高，愈能抑制管理階層之盈餘管理行為，降低不當租稅規劃，進而提高企業有效稅率。

關鍵字

所得稅制改革 ； 盈餘管理 ； 公司治理 ； 有效稅率

並列摘要

This study investigates the relationship among income tax system reform, earnings management, and corporate governance on the effective tax rate. Taiwan's government has amended its income tax law and reduced the income tax rate to 17% in 2010, in which the income tax is deflating the effective tax rate. This study further used discretionary accruals to proxy for earnings management behavior, showing that management of a business with more discretionary accruals targets reducing the tax burden through earnings management behavior, with greater earnings management implying a decline in the effective tax rate. Finally, we looked at whether good corporate governance mechanisms can effectively reduce the improper tax planning of earnings manipulation and increase the effective tax rate. We found that the characteristics that help better inhibit management's earnings management behavior, reduce inappropriate tax planning, and increase the effective tax rate include a higher institutional investors holding ratio with more discretionary accruals, as well as more people who understand the actual operations and have more professional knowledge.

並列關鍵字

income tax system reform ； earnings management ； corporate governance ； effective tax rates

參考文獻

毛治文、官月緞、曾于軒(2011)。探討我國不合常規移轉訂價查核準則之有效性。北商學報。20，17-38。

王元章、張椿柏(2012)。核心代理問題對盈餘管理之影響。會計審計論叢。2(2)，69-113。

李明威(2009)。移轉訂價查核準則實施對公司有效稅率之影響(碩士論文)。東吳大學會計學系。

汪瑞芝(2006)。兩稅合一制對公司資本投資影響之實證研究。中華管理評論國際學報。9(2)，1-18。

林世銘、楊朝旭(1994)。上市公司營利事業所得稅負擔之研究。財稅研究。26(6)，34-52。