Except as otherwise provided for expressly in this Act, income tax on a resident's global income and retirement income shall be calculated as follows: <Amended by Act No. 11146, Jan. 1, 2012; Act No. 12169, Jan. 1, 2014; Dec. 31, 2019; Dec. 31, 2022>
1. The calculated tax on global income and the calculated tax on retirement income under Article 55 shall be calculated, respectively, by applying the tax rate under Article 55 (1) (hereinafter referred to as "basic tax rate") to each tax base calculated pursuant to Article 14;
2. The final tax on global income and the final tax on retirement income shall be calculated, respectively, by applying tax credits under Articles 56, 56-2, 57, 57-2, 58, 59 and 59-2 through 59-4 to the amount of each tax calculated under subparagraph 1. In such cases, when a dividend tax credit under Article 56 exists, the amount determined by applying tax credits under Articles 56-2, 57, 57-2, 58, 59 and 59-2 through 59-4 to the amount determined by applying the dividend tax credit to the calculated tax amount or the amount under subparagraph 2 of Article 62, whichever is greater, shall be determined as the tax amount, and the final tax shall be determined by deducting the tax amount reduced or exempted under Article 59-5, if there is such amount to be reduced or exempted;
3. The gross final tax amount on global income and the gross final tax on retirement income shall be calculated, respectively, by adding the penalty tax pursuant to Articles 81, 81-2 through 81-13 of this Act and Articles 47-2 through 47-4 of the Framework Act on National Taxes to the final tax amounts calculated pursuant to subparagraph 2.[This Article Wholly Amended by Act No. 9897, Dec. 31, 2009][Enforcement Date: Jan. 1, 2025] subparagraph 2 of Article 15