The amount of employees' old-age pension is the amount arrived at when the number of months in the insured period is multiplied by an amount equal to 5.481/1000 of the average standardized amount of remuneration for the whole period during which the person was an insured (meaning the number arrived at when the standardized monthly amounts of remuneration and the standardized amounts of bonuses in each month that constitute a basis for calculation of the insured period are multiplied by the rates provided in the relevant items of the appended table for the category of beneficiary set forth in that item (hereinafter referred to as the "revaluation rate"), and the total is divided by the number of months in the insured period; the same applies hereinafter except for cases in Article 17-6, paragraph (1) and Article 29, paragraph (3) of the Supplementary Provisions).
老齢厚生年金の額は、被保険者であつた全期間の平均標準報酬額（被保険者期間の計算の基礎となる各月の標準報酬月額と標準賞与額に、別表各号に掲げる受給権者の区分に応じてそれぞれ当該各号に定める率（以下「再評価率」という。）を乗じて得た額の総額を、当該被保険者期間の月数で除して得た額をいう。附則第十七条の六第一項及び第二十九条第三項を除き、以下同じ。）の千分の五・四八一に相当する額に被保険者期間の月数を乗じて得た額とする。
If a beneficiary is an insured on September 1 of each year (hereinafter in this paragraph referred to as the "base date") (excluding a case where the beneficiary acquires status as an insured on the base date), the period during which the beneficiary was an insured before the month that includes the base date is to be the basis for the calculation of the amount of the employees' old-age pension, and the amount of pension is revised from the month following the month that includes the base date; provided, however, that if the base date falls in the period from the day on which the beneficiary forfeited status as an insured until the day on which the beneficiary again acquires status as an insured, and the period from the day on which the beneficiary forfeited status as an insured until the day on which the beneficiary again acquires status as an insured is one month or less, the period during which the beneficiary was an insured before the month that includes the base date is to be the basis for the calculation of the amount of the employees' old-age pension, and the amount of pension is revised from the month following the month that includes the base date.
受給権者が毎年九月一日（以下この項において「基準日」という。）において被保険者である場合（基準日に被保険者の資格を取得した場合を除く。）の老齢厚生年金の額は、基準日の属する月前の被保険者であつた期間をその計算の基礎とするものとし、基準日の属する月の翌月から、年金の額を改定する。ただし、基準日が被保険者の資格を喪失した日から再び被保険者の資格を取得した日までの間に到来し、かつ、当該被保険者の資格を喪失した日から再び被保険者の資格を取得した日までの期間が一月以内である場合は、基準日の属する月前の被保険者であつた期間を老齢厚生年金の額の計算の基礎とするものとし、基準日の属する月の翌月から、年金の額を改定する。
If a beneficiary who is an insured forfeits status as an insured and one month passes after the day on which the beneficiary forfeits status as an insured without the beneficiary's becoming an insured, the period during which the beneficiary was insured before the month in which the beneficiary forfeited status as an insured is to be the basis for the calculation of employees' old-age pension, and the amount of pension is revised as of the month that includes the day that is calculated as falling one month after the day on which the beneficiary forfeited that status (or the day falling under one of the items from item (ii) through item (iv) of Article 14, if applicable).
被保険者である受給権者がその被保険者の資格を喪失し、かつ、被保険者となることなくして被保険者の資格を喪失した日から起算して一月を経過したときは、その被保険者の資格を喪失した月前における被保険者であつた期間を老齢厚生年金の額の計算の基礎とするものとし、資格を喪失した日（第十四条第二号から第四号までのいずれかに該当するに至つた日にあつては、その日）から起算して一月を経過した日の属する月から、年金の額を改定する。