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題名:最低稅負制之隱稅及盈餘管理效果之研究
作者:吳瑞源
作者(外文):Jui-Yuan Wu
校院名稱:國立成功大學
系所名稱:會計學系碩博士班
指導教授:林松宏
賴秀卿
學位類別:博士
出版日期:2009
主題關鍵詞:盈餘管理隱稅最低稅負制Alternative Minimum TaxEarnings ManagementImplicit Tax
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政府為達成特定經濟政策,採行各項租稅優惠措施。長期實施租稅獎勵的結果,稅基嚴重遭受侵蝕,租稅的公平性亦遭到質疑。為改善國家財政困境及租稅不公平現象,政府對於特定免稅所得進行稅制改革,訂定「所得基本稅額條例」以實施最低稅負制,自2006年起對符合規定之特定免稅所得課徵10%之最低稅負。此一重大稅制改革,除增加政府稅收外,同時符合租稅公平正義的期待。但對企業而言,此一新稅制可能產生額外租稅負擔及不利的財務影響。因此,本研究以迴歸模式探討特定免稅所得是否存在隱稅,及實施最低稅負制對公司隱稅的影響,同時探討最低稅負制是否導致企業藉由盈餘管理之方式以降低未來可能增加之租稅負擔。
本研究之主要結論如下:
一、最低稅負制之隱稅效果:(一)最低稅負制實施前(2005年),公 司之特定免稅所得與股票稅前報酬率呈現負向關係,此符合隱稅理論,即租稅優惠愈大,隱稅成本愈高,稅前報酬率愈低。(二)最低稅負制實施後(2006年),公司特定免稅所得與股票稅前報酬率呈現負向關係之幅度,將較最低稅負制實施前(2005年)之負向關係幅度為低,即特定免稅所得的隱稅仍然存在,然因其租稅優惠減少,使得隱稅成本降低。
二、最低稅負制之盈餘管理效果:(一)最低稅負制實施前(2005年),當期有效稅率介於0%~10%且稅前財務所得為正數之公司(潛在受最低稅負制影響之公司),會從事提前認列所得之盈餘管理。(二)最低稅負制實施前(2005年),證券交易所得淨額為正數之公司(潛在受最低稅負制影響之公司),會從事提前認列所得之盈餘管理。
整體而言,實證結果顯示特定免稅所得存在隱稅,且最低稅負制確實有其隱稅效果;而公司為因應最低稅負制,會從事提前認列所得之盈餘管理行為,以達成降低稅負之盈餘管理目的。
In Taiwan, firms in the high-tech sector have long enjoyed tax exemptions through which the government effectively encourages high-tech firms to increase their investment. To prevent companies within the high-income bracket from paying little or no income tax, the government enacted the Alternative Minimum Tax Act (AMT, hereafter) in 2005 to uphold tax equity, to ensure tax revenue for the country, and to encourage enterprises and individuals to fulfill their minimum income tax obligation as a contribution to public finance. The AMT is aimed at plugging loopholes in the nation's taxation system which allows individuals and enterprises with a high income to claim excessive tax breaks, eroding social justice and leading to unfair taxation consequence. According to the Act, a 10 percent minimum tax will be levied on the businesses with annual earnings of more than NT$2 million starting 2006. For those companies already fulfill the minimum tax obligation according to the regular income tax, they don't have to pay extra tax under the AMT. On the other hand, if their regular tax falls below this minimum taxation, they have to make up the difference by paying the extra.
After the AMT is effective, the specific tax-exempt income will possibly become taxable. This study investigates the impact of the AMT on implicit tax and earnings management. The empirical results are summarized as follows:
1. Before the AMT is effective, the specific tax-exempt income is negatively related to the risk-unadjusted pretax returns on common stocks. Additionally, the magnitude of implicit tax of the specific tax-exempt income is reduced after the AMT is enforced.
2. Firms with current effective tax rate below 10% and positive pretax accounting income, or with net capital gains, are apparently motivated to minimize their tax obligation by recognizing more taxable income earlier in 2005 than it would otherwise have been.
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