# 健康保険法施行令 / Order for Enforcement of the Health Insurance Act — 第四十五条の三 (Article 45-3) This is the Markdown twin of https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3. Every law, and how to address a provision: https://japanlaw.org/llms.txt. The same laws as MCP tools (no sign-in): https://japanlaw.org/mcp. - Law: 健康保険法施行令 (Order for Enforcement of the Health Insurance Act), 大正十五年勅令第二百四十三号 - English title "Order for Enforcement of the Health Insurance Act": claude-opus-5-5 - Kind: ImperialOrder — the distinction between 法律 (Act), 政令 (Cabinet Order), 省令 (Ministerial Order) and 条例 (local ordinance) decides who may issue it and what it may say. - Provision: 第四十五条の三 (Article 45-3)（三月以外の月から用いる都道府県単位保険料率の算定方法） — address `art-45-3` - Text in force since: 2026-10-01 - URL (the page that opens at this provision): https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3 - e-Gov law ID: 215IO0000000243 — never renamed. A permanent link, `/l/{lawId}/{address}` on this site, redirects to the page. - Every provision below carries its address and its URL on the line under it. - Japanese text: e-Gov 法令検索, Digital Agency (デジタル庁). English: as marked on each line below. Only the Japanese as published by the government has legal effect; the text below is a copy of it. Every English rendering below is a translation and says which kind: the Ministry of Justice's translation, or this site's machine translation, whose model and date the Sources list names. They are never merged and never substituted for one another. --- ### 第四十五条の三（三月以外の月から用いる都道府県単位保険料率の算定方法） — Method of Calculating the Premium Rate for Each Prefecture to Be Used from a Month Other than March caption: machine translation, not official art-45-3 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3 **第一項** 協会は、前条の規定にかかわらず、その変更しようとする都道府県単位保険料率を三月以外の月から用いようとするときは、厚生労働省令で定めるところにより、第一号に掲げる額から第二号に掲げる額を控除した額を予定保険料納付率で除して得た額を第三号に掲げる額で除することにより、当該都道府県単位保険料率を算定するものとする。 art-45-3/par-1 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1 Notwithstanding the provisions of the preceding Article, when JHIA intends to use a premium rate for each prefecture that it is about to change from a month other than March, JHIA is to calculate that premium rate for each prefecture, as specified by Order of the Ministry of Health, Labour and Welfare, by dividing the amount obtained by dividing the amount obtained by deducting the amount listed in item (ii) from the amount listed in item (i) by the projected premium payment rate by the amount listed in item (iii). machine translation, not official **一** 当該変更後の都道府県単位保険料率を用いる最初の月（次号及び第三号において「適用月」という。）の属する事業年度における前条第一号に掲げる額 art-45-3/par-1/item-1 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1/item-1 the amount listed in item (i) of the preceding Article in the business year to which the first month in which the premium rate for each prefecture after the change is to be used (referred to as the "month of application" in the following item and item (iii)) belongs; machine translation, not official **二** 次のイからハまでに掲げる適用月の区分に応じ、それぞれイからハまでに定める額 art-45-3/par-1/item-2 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1/item-2 the amount specified respectively in (a) through (c) in accordance with the classification of months of application listed in (a) through (c): machine translation, not official **イ** ロ又はハに掲げる月以外の月　適用月の属する事業年度の前事業年度の三月から当該適用月の前月までの各月の当該支部被保険者（任意継続被保険者を除く。）の総報酬額の総額及び当該適用月の属する事業年度の四月から当該適用月の前月までの各月の当該支部被保険者（任意継続被保険者に限る。）の総報酬額の総額の合算額の見込額に当該変更前の都道府県単位保険料率を乗じて得た額に当該適用月の属する事業年度における予定保険料納付率を乗じて得た額 art-45-3/par-1/item-2/sub-1 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1/item-2/sub-1 a month other than a month listed in (b) or (c): the amount obtained by multiplying the estimated amount of the total sum of the total amount of the total remuneration of the branch-insured person concerned (excluding insured persons with optional and continued coverage) for each month from March of the business year previous to the business year to which the month of application belongs through the month preceding the month of application, and the total amount of the total remuneration of the branch-insured person concerned (limited to insured persons with optional and continued coverage) for each month from April of the business year to which the month of application belongs through the month preceding the month of application, by the premium rate for each prefecture before the change, and then multiplying the amount so obtained by the projected premium payment rate in the business year to which the month of application belongs; machine translation, not official **ロ** 四月　当該四月の前月の当該支部被保険者（任意継続被保険者を除く。）の総報酬額の総額の見込額に当該変更前の都道府県単位保険料率を乗じて得た額に当該四月の属する事業年度における予定保険料納付率を乗じて得た額 art-45-3/par-1/item-2/sub-2 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1/item-2/sub-2 April: the amount obtained by multiplying the estimated amount of the total amount of the total remuneration of the branch-insured person concerned (excluding insured persons with optional and continued coverage) for the month preceding that April by the premium rate for each prefecture before the change, and then multiplying the amount so obtained by the projected premium payment rate in the business year to which that April belongs; machine translation, not official **ハ** 五月　当該五月の前々月及び前月の当該支部被保険者（任意継続被保険者を除く。）の総報酬額の総額並びに当該五月の前月の当該支部被保険者（任意継続被保険者に限る。）の総報酬額の総額の合算額の見込額に当該変更前の都道府県単位保険料率を乗じて得た額に当該五月の属する事業年度における予定保険料納付率を乗じて得た額 art-45-3/par-1/item-2/sub-3 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1/item-2/sub-3 May: the amount obtained by multiplying the estimated amount of the total sum of the total amount of the total remuneration of the branch-insured person concerned (excluding insured persons with optional and continued coverage) for the month two months before that May and the month preceding that May, and the total amount of the total remuneration of the branch-insured person concerned (limited to insured persons with optional and continued coverage) for the month preceding that May, by the premium rate for each prefecture before the change, and then multiplying the amount so obtained by the projected premium payment rate in the business year to which that May belongs; machine translation, not official **三** 適用月から当該適用月の属する事業年度の二月までの各月（適用月が二月の場合にあっては、当該二月）の当該支部被保険者（任意継続被保険者を除く。）の総報酬額の総額及び当該適用月から当該適用月の属する事業年度の三月までの各月の当該支部被保険者（任意継続被保険者に限る。）の総報酬額の総額の合算額の見込額 art-45-3/par-1/item-3 · https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1/item-3 the estimated amount of the total sum of the total amount of the total remuneration of the branch-insured person concerned (excluding insured persons with optional and continued coverage) for each month from the month of application through February of the business year to which the month of application belongs (where the month of application is February, that February), and the total amount of the total remuneration of the branch-insured person concerned (limited to insured persons with optional and continued coverage) for each month from the month of application through March of the business year to which the month of application belongs. machine translation, not official --- ## Cites - art-45-3/par-1: 前条 → 健康保険法施行令 第四十五条の二 (Article 45-2), art-45-2 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2 - art-45-3/par-1: 第一号 → 健康保険法施行令 第四十五条の三第一項第一号 (Article 45-3, paragraph (1), item (i)), art-45-3/par-1/item-1 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1/item-1 - art-45-3/par-1: 第二号 → 健康保険法施行令 第四十五条の三第一項第二号 (Article 45-3, paragraph (1), item (ii)), art-45-3/par-1/item-2 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1/item-2 - art-45-3/par-1: 第三号 → 健康保険法施行令 第四十五条の三第一項第三号 (Article 45-3, paragraph (1), item (iii)), art-45-3/par-1/item-3 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1/item-3 - art-45-3/par-1/item-1: 次号 → 健康保険法施行令 第四十五条の三第一項第二号 (Article 45-3, paragraph (1), item (ii)), art-45-3/par-1/item-2 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1/item-2 - art-45-3/par-1/item-1: 第三号 → 健康保険法施行令 第四十五条の三第一項第三号 (Article 45-3, paragraph (1), item (iii)), art-45-3/par-1/item-3 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1/item-3 - art-45-3/par-1/item-1: 前条第一号 → 健康保険法施行令 第四十五条の二第一項第一号 (Article 45-2, paragraph (1), item (i)), art-45-2/par-1/item-1 — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1/item-1 ## Cited by 13 provisions cite this one. No official source publishes this direction. - 健康保険法施行令 第四十五条の二第一項（都道府県単位保険料率の算定方法） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1 - 健康保険法施行令 第四十五条の二第一項第一号ロ（都道府県単位保険料率の算定方法） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-2/par-1/item-1/sub-2 - 健康保険法施行令 第四十五条の三第一項（三月以外の月から用いる都道府県単位保険料率の算定方法） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1 - 健康保険法施行令 第四十五条の三第一項第一号（三月以外の月から用いる都道府県単位保険料率の算定方法） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-3/par-1/item-1 - 健康保険法施行令 第四十五条の四第四項第一号（支部被保険者を単位とする健康保険の財政の調整） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/art-45-4/par-4/item-1 - 健康保険法施行令 附則第二条第一項第七号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-7 - 健康保険法施行令 附則第二条第一項第八号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-8 - 健康保険法施行令 附則第二条第一項第十号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-10 - 健康保険法施行令 附則第二条第一項第十一号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-11 - 健康保険法施行令 附則第二条第一項第十二号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-12 - 健康保険法施行令 附則第二条第一項第十三号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-13 - 健康保険法施行令 附則第二条第一項第十四号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-14 - 健康保険法施行令 附則第二条第一項第十五号（定義） — https://japanlaw.org/ja/health-insurance-act-enforcement-order/suppl-4212-63/art-2/par-1/item-15 --- ## Sources - claude-opus-5-5 — English title of a law in this collection, written for this site, written 2026-11-06 - e-Gov 法令検索, Digital Agency (デジタル庁) — 健康保険法施行令 — the text in force from 2026-10-01 (https://laws.e-gov.go.jp/law/215IO0000000243/20261001_508CO0000000276), retrieved 2026-11-06 - claude-sonnet-5-5 — Machine translation, batch health-insurance-act-enforcement-order-20261106T164949-016, translated 2026-11-07 - This site's parser, version 229 — 健康保険法施行令 — structure, counts, cross-references and defined terms, computed 2026-11-06