Enforcement Rules of the Income Tax Act Article 83

Where any of the taxable incomes itemized in Article 88 of the Act is exemptible from income tax under any Subparagraph of Paragraph One, Article 4 of the Act, no income tax withholding shall be made in respect of such income. However, if any of such incomes is subject to fixed-amount tax exemption, the portion of the amount in such income exceeding the taxation threshold shall still be subject to tax withholding.The interest income derived by a banking institution from money-lending business and the commission income derived by a profit-seeking enterprise from issuing uniform invoices, leasing business and/or the royalty income under the law shall all be exempted from income tax withholding.
中文原文 所得稅法施行細則第83條
依本法第八十八條應扣繳所得稅款之各類所得,如有依本法第四條第一項各款規定免納所得稅者,應免予扣繳。
但採定額免稅者,其超過起扣點部分仍應扣繳。
銀行業貸放款之利息所得及營利事業依法開立統一發票之佣金、租賃及權利金收入,均免予扣繳。

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