Income Tax Act Article 24-1

Revenues received by a profit-seeking enterprise from interest on government bonds, corporate bonds, and financial bonds shall be calculated in accordance with the bonds’ holding periods, face values and interest rates.The tax on interest revenues, as mentioned in the preceding paragraph and calculated in accordance with the prescribed withholding rates, shall be deducted from the amount of income tax payable on the annual income tax return of a profit-seeking enterprise.The gains or losses derived from securities transactions whereby a profit-seeking enterprise purchases bonds as described in the first paragraph between two interest payment days and then sells them before the next interest payment day shall be the net amount of the sale price minus the purchase price and interest revenues.Beginning January 1, 2010, the interest derived from a repo (RP/RS) trade whereby a profit-seeking enterprise purchases securities or short-term commercial papers as described in the first paragraph and Paragraphs 2 and 3 in the preceding Article shall be the net amount of the sale price at their maturity in excess of the original purchase price. The interest shall be withheld in accordance with Article 88 and added to the amount of income of the profit-seeking enterprise, and the amount of such withholding tax shall be deducted from the amount of income tax payable for the annual income tax return of the profit-seeking enterprise.
中文原文 所得稅法第24-1條
營利事業持有公債、公司債及金融債券,應按債券持有期間,依債券之面值及利率計算利息收入。
前項利息收入依規定之扣繳率計算之稅額,得自營利事業所得稅結算申報應納稅額中減除。
營利事業於二付息日間購入第一項債券並於付息日前出售者,應以售價減除購進價格及依同項規定計算之利息收入後之餘額為證券交易所得或損失。
自中華民國九十九年一月一日起,營利事業以第一項、前條第二項、第三項規定之有價證券或短期票券從事附條件交易,到期賣回金額超過原買入金額部分之利息所得,應依第八十八條規定扣繳稅款,並計入營利事業所得額課稅;該扣繳稅款得自營利事業所得稅結算申報應納稅額中減除。

English translation for reference only; the Chinese text prevails. Not legal advice.