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Order for Enforcement of the Income Tax Act

所得税法施行令(しょとくぜいほうしこうれい)

Section 4 Calculation of Necessary Expenses, etc. (Articles 99 to 102)

The law as Cabinet Order Partially Amending the Order for Enforcement of the Income Tax Act (Cabinet Order No. 93 of 2026) leaves it, with the words it changes marked.

The main text is read a page at a time: a chapter to a page, and a long chapter in runs of articles. The whole main text, and the supplementary provisions and appended tables this amendment changes. Those it leaves untouched are on the page for the text in force.

How the changes are shown

Underlined: words the amendment adds. A bar: where it removes words.Underlined: words the amendment adds. Struck through: the words it removes.Underlined: words the amendment adds. Struck through: the words it removes.

Subsection 2 Valuation of Inventory第二款 棚卸資産の評価

Division 1 Methods of Valuing Inventory第一目 棚卸資産の評価の方法

Article 99第九十九条

Methods of Valuing Inventory(棚卸資産の評価の方法)
Article 99, paragraph (1)

The methods of valuation specified by Cabinet Order prescribed in Article 47, paragraph (1) (Calculation of Costs of Inventory Sold and Valuation Methods) of the Act that may be selected for calculating, pursuant to that paragraph, the assessed value of Inventory held on December 31 of that year (where the Resident referred to in that paragraph dies or becomes Absent From Japan during the year, the time of that death or the start of that Absence From Japan; the same applies hereinafter in this Subsection) are the following methods (where approval from the district director for filing a Blue Return for the income tax for that year has not been obtained, the method listed in item (i)).

法第四十七条第一項(棚卸資産の売上原価等の計算及びその評価の方法)の規定によるその年十二月三十一日(同項の居住者が年の中途において死亡し又は出国をした場合には、その死亡又は出国の時。以下この款において同じ。)において有する棚卸資産の評価額の計算上選定をすることができる同項に規定する政令で定める評価の方法は、次に掲げる方法(その年分の所得税について青色申告書を提出することにつき税務署長の承認を受けていない場合には、第一号に掲げる方法)とする。

Article 99, paragraph (1), item (i)

the cost method (meaning a method of calculating the acquisition price of Inventory held on December 31 of that year (hereinafter in this paragraph referred to as "closing inventory") by any one of the following methods and taking the acquisition price so calculated as the assessed value of that closing inventory):

原価法(その年十二月三十一日において有する棚卸資産(以下この項において「期末棚卸資産」という。)につき次に掲げる方法のうちいずれかの方法によつてその取得価額を算出し、その算出した取得価額をもつて当該期末棚卸資産の評価額とする方法をいう。)

Article 99, paragraph (1), item (i), (a)

the specific identification method (meaning a method of taking the individual acquisition price of the whole of the closing inventory as its acquisition price);

個別法(期末棚卸資産の全部について、その個々の取得価額をその取得価額とする方法をいう。)

Article 99, paragraph (1), item (i), (b)

the first-in first-out method (meaning a method of distinguishing closing inventory by differences in kind, quality, and model (hereinafter in this paragraph referred to as "types, etc."), and, for items of the same types, etc., regarding that closing inventory as consisting, in sequence, of Inventory of the same types, etc. starting from that acquired on the day nearest to December 31 of that year, and taking the acquisition price of the Inventory so regarded as its acquisition price);

先入先出法(期末棚卸資産をその種類、品質及び型(以下この項において「種類等」という。)の異なるごとに区別し、その種類等の同じものについて、当該期末棚卸資産をその年十二月三十一日から最も近い日において取得した種類等を同じくする棚卸資産から順次成るものとみなし、そのみなされた棚卸資産の取得価額をその取得価額とする方法をいう。)

Article 99, paragraph (1), item (i), (c)

the total average method (meaning a method of distinguishing Inventory by differences in types, etc., and, for items of the same types, etc., taking as the acquisition price per unit the price calculated by dividing the sum of the total amount of the acquisition price of Inventory of the same types, etc. held on January 1 of that year and the total amount of the acquisition price of Inventory of the same types, etc. acquired during that year by the total quantity of that Inventory);

総平均法(棚卸資産をその種類等の異なるごとに区別し、その種類等の同じものについて、その年一月一日において有していた種類等を同じくする棚卸資産の取得価額の総額とその年中に取得した種類等を同じくする棚卸資産の取得価額の総額との合計額をこれらの棚卸資産の総数量で除して計算した価額をその一単位当たりの取得価額とする方法をいう。)

Article 99, paragraph (1), item (i), (d)

the moving average method (meaning a method of distinguishing Inventory by differences in types, etc., and, for items of the same types, etc., regarding the initial acquisition price per unit as having been revised, where Inventory of the same types, etc. is acquired again, to the average unit price calculated on the basis of the quantities and acquisition prices of the Inventory held at the time of that acquisition and the Inventory so acquired, regarding the acquisition price per unit as having been revised by the same method each time Inventory of the same types, etc. is acquired thereafter, and taking as the acquisition price per unit the acquisition price per unit regarded as having been revised on the day nearest to December 31 of that year);

移動平均法(棚卸資産をその種類等の異なるごとに区別し、その種類等の同じものについて、当初の一単位当たりの取得価額が、再び種類等を同じくする棚卸資産を取得した場合にはその取得の時において有する当該棚卸資産とその取得した棚卸資産との数量及び取得価額を基礎として算出した平均単価によつて改定されたものとみなし、以後種類等を同じくする棚卸資産を取得する都度同様の方法により一単位当たりの取得価額が改定されたものとみなし、その年十二月三十一日から最も近い日において改定されたものとみなされた一単位当たりの取得価額をその一単位当たりの取得価額とする方法をいう。)

Article 99, paragraph (1), item (i), (e)

the last purchase cost method (meaning a method of distinguishing closing inventory by differences in types, etc., and, for items of the same types, etc., taking the acquisition price per unit of those acquired on the day nearest to December 31 of that year as the acquisition price per unit);

最終仕入原価法(期末棚卸資産をその種類等の異なるごとに区別し、その種類等の同じものについて、その年十二月三十一日から最も近い日において取得したものの一単位当たりの取得価額をその一単位当たりの取得価額とする方法をいう。)

Article 99, paragraph (1), item (i), (f)

the retail method (meaning a method of distinguishing closing inventory by differences in types, etc. or the ordinary gross profit rate (meaning the ratio that the amount obtained by deducting the price normally required to acquire the Inventory from the ordinary sales price of the Inventory bears to that ordinary sales price; the same applies hereinafter in this paragraph), and, for items of the same types, etc. or ordinary gross profit rate, taking as the acquisition price the amount calculated by multiplying the total of the ordinary sales prices of Inventory of the same types, etc. or ordinary gross profit rate as of December 31 of that year by the cost ratio (meaning the ratio that the sum of the total amount of the acquisition price of that Inventory as of January 1 of that year and the total amount of the acquisition price of that Inventory acquired during that year bears to the sum of the total of those ordinary sales prices and the total amount of consideration for that Inventory sold during that year));

売価還元法(期末棚卸資産をその種類等又は通常の差益の率(棚卸資産の通常の販売価額のうちに当該通常の販売価額から当該棚卸資産を取得するために通常要する価額を控除した金額の占める割合をいう。以下この項において同じ。)の異なるごとに区別し、その種類等又は通常の差益の率の同じものについて、その年十二月三十一日における種類等又は通常の差益の率を同じくする棚卸資産の通常の販売価額の総額に原価の率(当該通常の販売価額の総額とその年中に販売した当該棚卸資産の対価の総額との合計額のうちにその年一月一日における当該棚卸資産の取得価額の総額とその年中に取得した当該棚卸資産の取得価額の総額との合計額の占める割合をいう。)を乗じて計算した金額をその取得価額とする方法をいう。)

Article 99, paragraph (1), item (ii)

the lower of cost or market method (meaning a method of distinguishing closing inventory by differences in types, etc. (for those based on the price calculated by the cost method using the acquisition price calculated by the retail method listed in (f) of the preceding item, types, etc. or ordinary gross profit rate; the same applies hereinafter in this item), and, for items of the same types, etc., taking as the assessed value the lower of the price assessed by the cost method using the acquisition price calculated by any of the methods listed in the preceding item and the price as of December 31 of that year).

低価法(期末棚卸資産をその種類等(前号ヘに掲げる売価還元法により算出した取得価額による原価法により計算した価額を基礎とするものにあつては、種類等又は通常の差益の率。以下この号において同じ。)の異なるごとに区別し、その種類等の同じものについて、前号に掲げる方法のうちいずれかの方法により算出した取得価額による原価法により評価した価額とその年十二月三十一日における価額とのうちいずれか低い価額をもつてその評価額とする方法をいう。)

Article 99, paragraph (2)

The cost method using the acquisition price calculated by the specific identification method listed in item (i), (a) of the preceding paragraph (including the lower of cost or market method listed in item (ii) of that paragraph that is based on the price assessed by that cost method) may not be selected, notwithstanding the provisions of that paragraph, for Inventory that is normally acquired in large quantities through a single transaction and whose price is determined according to specifications.

前項第一号イに掲げる個別法により算出した取得価額による原価法(当該原価法により評価した価額を基礎とする同項第二号に掲げる低価法を含む。)は、棚卸資産のうち通常一の取引によつて大量に取得され、かつ、規格に応じて価格が定められているものについては、同項の規定にかかわらず、選定することができない。

Article 99-2第九十九条の二

Special Methods of Valuing Inventory(棚卸資産の特別な評価の方法)
Article 99-2, paragraph (1)

A Resident who has obtained the approval of the competent district director with jurisdiction over the place for tax payment to calculate the assessed value of Inventory that the Resident holds by a method of valuation other than the method of valuation prescribed in paragraph (1) of the preceding Article, in place of that method of valuation, may select the approved method of valuation for calculating the assessed value of those assets for the year that includes the day on which the approval was obtained and each subsequent year.

居住者は、その有する棚卸資産の評価額を前条第一項に規定する評価の方法に代え当該評価の方法以外の評価の方法により計算することについて納税地の所轄税務署長の承認を受けた場合には、当該資産のその承認を受けた日の属する年分以後の各年分の評価額の計算については、その承認を受けた評価の方法を選定することができる。

Article 99-2, paragraph (2)

A Resident who intends to obtain the approval referred to in the preceding paragraph must submit to the competent district director with jurisdiction over the place for tax payment a written application stating the particulars of the method of valuation that the Resident intends to adopt, the reason for intending to adopt that method, the type of business and category of assets prescribed in paragraph (1) of the following Article for which the Resident intends to calculate the assessed value by that method, and other matters specified by Ministry of Finance Order.

前項の承認を受けようとする居住者は、その採用しようとする評価の方法の内容、その方法を採用しようとする理由、その方法により評価額の計算をしようとする次条第一項に規定する事業の種類及び資産の区分その他財務省令で定める事項を記載した申請書を納税地の所轄税務署長に提出しなければならない。

Article 99-2, paragraph (3)

When the written application referred to in the preceding paragraph is submitted, the district director is, without delay, to examine it and either approve the method of valuation and the type of business and category of assets prescribed in paragraph (1) of the following Article pertaining to the application or, where the district director finds that calculation of the amount of business income of that Resident for each year would be difficult to carry out properly by the method of valuation pertaining to the application, reject the application.

税務署長は、前項の申請書の提出があつた場合には、遅滞なく、これを審査し、その申請に係る評価の方法並びに次条第一項に規定する事業の種類及び資産の区分を承認し、又はその申請に係る評価の方法によつてはその居住者の各年分の事業所得の金額の計算が適正に行われ難いと認めるときは、その申請を却下する。

Article 99-2, paragraph (4)

After granting the approval referred to in paragraph (1), where the district director finds that special circumstances have arisen that make it inappropriate to calculate the assessed value of the Inventory pertaining to the approval by the method of valuation pertaining to the approval, the district director may rescind the approval.

税務署長は、第一項の承認をした後、その承認に係る評価の方法によりその承認に係る棚卸資産の評価額の計算をすることを不適当とする特別の事情が生じたと認める場合には、その承認を取り消すことができる。

Article 99-2, paragraph (5)

When taking the disposition referred to in the preceding two paragraphs, the district director is to notify the Resident subject to the disposition to that effect in writing.

税務署長は、前二項の処分をするときは、その処分に係る居住者に対し、書面によりその旨を通知する。

Article 99-2, paragraph (6)

Where the disposition referred to in paragraph (4) has been made, the effect of that disposition arises with respect to the calculation of the assessed value of the Inventory pertaining to that disposition when calculating the amount of business income for the year that includes the day on which the disposition was made and each subsequent year.

第四項の処分があつた場合には、その処分のあつた日の属する年分以後の各年分の事業所得の金額を計算する場合のその処分に係る棚卸資産の評価額の計算についてその処分の効果が生ずるものとする。

Article 99-2, paragraph (7)

A Resident who has received the disposition referred to in paragraph (4) must, by the Filing Deadline for the income tax for the year that includes the day on which the Resident received the disposition, notify the competent district director with jurisdiction over the place for tax payment in writing, for the Inventory pertaining to that disposition, for each type of business and category of assets prescribed in paragraph (1) of the following Article, of the method of valuation to be used among the methods of valuation prescribed in paragraph (1) of the preceding Article.

居住者は、第四項の処分を受けた場合には、その処分を受けた日の属する年分の所得税に係る確定申告期限までに、その処分に係る棚卸資産につき、次条第一項に規定する事業の種類及び資産の区分ごとに、前条第一項に規定する評価の方法のうちそのよるべき方法を書面により納税地の所轄税務署長に届け出なければならない。

Article 100第百条

Selection of Methods of Valuing Inventory(棚卸資産の評価の方法の選定)
Article 100, paragraph (1)

The method of valuing Inventory prescribed in Article 99, paragraph (1) (Methods of Valuing Inventory) must be selected for each type of business carried on by a Resident and for each category of Inventory, namely goods or products (excluding by-products and work scrap), semi-finished products, work in process (including partially completed construction work), principal raw materials and auxiliary raw materials, and other Inventory.

第九十九条第一項(棚卸資産の評価の方法)に規定する棚卸資産の評価の方法は、居住者の営む事業の種類ごとに、かつ、商品又は製品(副産物及び作業くずを除く。)、半製品、仕掛品(半成工事を含む。)、主要原材料及び補助原材料その他の棚卸資産の区分ごとに選定しなければならない。

Article 100, paragraph (2)

A Resident must, by the Filing Deadline for the income tax for the year that includes the day listed in each of the following items according to the category of persons listed in that item, notify the competent district director with jurisdiction over the place for tax payment in writing, for Inventory, for each type of business and category of assets prescribed in the preceding paragraph, of the method of valuation to be used among the methods of valuation prescribed in Article 99, paragraph (1).

居住者は、次の各号に掲げる者の区分に応じ当該各号に掲げる日の属する年分の所得税に係る確定申告期限までに、棚卸資産につき、前項に規定する事業の種類及び資産の区分ごとに、第九十九条第一項に規定する評価の方法のうちそのよるべき方法を書面により納税地の所轄税務署長に届け出なければならない。

Article 100, paragraph (2), item (i)

a Resident who has newly commenced a business that gives rise to business income: the day on which that business was commenced;

新たに事業所得を生ずべき事業を開始した居住者 当該事業を開始した日

Article 100, paragraph (2), item (ii)

a Resident who, after commencing the business referred to in the preceding item, has newly commenced another type of business or changed the type of business: the day on which the Resident commenced that other type of business or changed the type of business.

前号の事業を開始した後新たに他の種類の事業を開始し又は事業の種類を変更した居住者 当該他の種類の事業を開始し又は事業の種類を変更した日

Article 101第百一条

Procedures for Changing Methods of Valuing Inventory(棚卸資産の評価の方法の変更手続)
Article 101, paragraph (1)

A Resident who intends to change the method of valuation selected for Inventory (including the method of valuation prescribed in paragraph (1) of the following Article that a person who has not notified a method of valuation is required to use) must obtain the approval of the competent district director with jurisdiction over the place for tax payment.

居住者は、棚卸資産につき選定した評価の方法(その評価の方法を届け出なかつた者がよるべきこととされている次条第一項に規定する評価の方法を含む。)を変更しようとするときは、納税地の所轄税務署長の承認を受けなければならない。

Article 101, paragraph (2)

A Resident who intends to obtain the approval referred to in the preceding paragraph must submit to the competent district director with jurisdiction over the place for tax payment, by March 15 of the year in which the Resident intends to adopt the new method of valuation, a written application stating that fact, the reason for the intended change, and other matters specified by Ministry of Finance Order.

前項の承認を受けようとする居住者は、その新たな評価の方法を採用しようとする年の三月十五日までに、その旨、変更しようとする理由その他財務省令で定める事項を記載した申請書を納税地の所轄税務署長に提出しなければならない。

Article 101, paragraph (3)

Where the written application referred to in the preceding paragraph is submitted, the district director may reject the application if a considerable period has not elapsed since the Resident who submitted the written application adopted the method of valuation currently in use, or if the district director finds that calculation of the amount of business income of that Resident for each year would be difficult to carry out properly by the method of valuation to which the Resident intends to change.

税務署長は、前項の申請書の提出があつた場合において、その申請書を提出した居住者が現によつている評価の方法を採用してから相当期間を経過していないとき、又は変更しようとする評価の方法によつてはその者の各年分の事業所得の金額の計算が適正に行われ難いと認めるときは、その申請を却下することができる。

Article 101, paragraph (4)

Where the written application referred to in paragraph (2) is submitted, and the district director makes a disposition of approval or rejection of the application, the district director is to notify the Resident who made the application to that effect in writing.

税務署長は、第二項の申請書の提出があつた場合において、その申請につき承認又は却下の処分をするときは、その申請をした居住者に対し、書面によりその旨を通知する。

Article 101, paragraph (5)

Where the written application referred to in paragraph (2) has been submitted, if no disposition of approval or rejection has been made on the application by December 31 of that year, the approval is deemed to have been granted on that day.

第二項の申請書の提出があつた場合において、その年十二月三十一日までにその申請につき承認又は却下の処分がなかつたときは、同日においてその承認があつたものとみなす。

Article 102第百二条

Statutory Methods of Valuing Inventory(棚卸資産の法定評価方法)
Article 102, paragraph (1)

The method specified by Cabinet Order in the case where a method of valuation prescribed in Article 47, paragraph (1) (Calculation of Costs of Inventory Sold and Valuation Methods) of the Act has not been selected or Inventory has not been valued by the method selected is the cost method using the acquisition price calculated by the last purchase cost method listed in Article 99, paragraph (1), item (i), (e) (Methods of Valuing Inventory).

法第四十七条第一項(棚卸資産の売上原価等の計算及びその評価の方法)に規定する評価の方法を選定しなかつた場合又は選定した方法により評価しなかつた場合における政令で定める方法は、第九十九条第一項第一号ホ(棚卸資産の評価の方法)に掲げる最終仕入原価法により算出した取得価額による原価法とする。

Article 102, paragraph (2)

Where a Resident has not valued Inventory by the method of valuation selected for it (including the method of valuation prescribed in the preceding paragraph that a Resident who has not notified a method of valuation is required to use), if the district director finds that the method of valuation the Resident used falls under one of the methods of valuation prescribed in Article 99, paragraph (1) and that the amount of business income of the Resident for each year can be properly calculated even by the method of valuation used, the district director may make a Reassessment or determination on the basis of the amount of business income for each year calculated by the method of valuation used.

税務署長は、居住者が棚卸資産につき選定した評価の方法(評価の方法を届け出なかつた居住者がよるべきこととされている前項に規定する評価の方法を含む。)により評価しなかつた場合において、その居住者が行つた評価の方法が第九十九条第一項に規定する評価の方法のうちいずれかの方法に該当し、かつ、その行つた評価の方法によつてもその居住者の各年分の事業所得の金額の計算を適正に行うことができると認めるときは、その行つた評価の方法により計算した各年分の事業所得の金額を基礎として更正又は決定をすることができる。

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