前条第一項の当該年度の初日の属する年の前年中における個人の事業の所得又は同条第二項の当該年の一月一日から事業の廃止の日までの個人の事業の所得は、それぞれ当該個人の当該年度の初日の属する年の前年中における事業又は当該年の一月一日から事業の廃止の日までの事業に係る総収入金額から必要な経費を控除した金額によるものとし、この法律又は政令で特別の定めをする場合を除くほか、当該年度の初日の属する年の前年中又は当該年の一月一日から事業の廃止の日までの所得税の課税標準である所得につき適用される所得税法第二十六条及び第二十七条(同法第百六十五条第一項の規定によりこれらの規定に準ずる場合を含む。)に規定する不動産所得及び事業所得の計算の例により算定する。ただし、租税特別措置法第二十八条の四の規定の例によらないものとし、第七十二条の二第十項第一号から第五号までに掲げる事業を行う個人が社会保険診療(第七十二条の二十三第三項に規定する社会保険診療をいう。以下この項において同じ。)につき支払を受けた金額は、総収入金額に算入せず、また、当該社会保険診療に係る経費は、必要な経費に算入しない。
The income from an individual's business in the year preceding the year in which the first day of the relevant fiscal year falls under paragraph (1) of the preceding Article, or the income from an individual's business from January 1 of the relevant year to the day of abolition of the business under paragraph (2) of that Article, is to be the amount obtained by deducting necessary expenses from the gross revenue relating to the business of that individual in the year preceding the year in which the first day of the relevant fiscal year falls, or relating to the business from January 1 of the relevant year to the day of abolition of the business, respectively, and, except as otherwise specially provided for by this Act or Cabinet Order, is to be calculated in accordance with the rules for calculating real property income and business income prescribed in Articles 26 and 27 of the Income Tax Act (including the cases that conform to those provisions pursuant to Article 165, paragraph (1) of that Act), which apply to the income that is the tax base of income tax in the year preceding the year in which the first day of the relevant fiscal year falls, or from January 1 of the relevant year to the day of abolition of the business; provided, however, that the rules of the provisions of Article 28-4 of the Act on Special Measures Concerning Taxation are not to be followed, and the amount received by an individual conducting a business set forth in Article 72-2, paragraph (10), items (i) through (v) for social insurance medical care (meaning social insurance medical care prescribed in Article 72-23, paragraph (3); the same applies hereinafter in this paragraph) is not included in gross revenue, and the expenses relating to that social insurance medical care are not included in necessary expenses.