databutler.dev · /facts — every fact · Verified Facts protocol · /.well-known/facts.json · /changes

Employees' pension insurance (kosei nenkin, 厚生年金) contribution rate, employer + employee combined (fixed since September 2017)

18.3 % of standard remuneration (employer + employee)

from 2017-09-01 · verified 2026-10-24 against the official source · next expected change 2027-04-01

平成29年9月を最後に引上げが終了し、厚生年金保険料率は18.3％で固定
key
jp/pension/kosei-nenkin-rate
value
18.3 % of standard remuneration (employer + employee)
period
—
effective
2017-09-01 to date
source
https://www.nenkin.go.jp/service/kounen/hokenryo/ryogaku/ryogakuhyo/index.html
verified
2026-10-24 — fresh (13 days ago; next check by 2026-11-28)
next expected change
2027-04-01 (annual: a fixed day each year)
source checked
2026-11-02 (the newest day the automated check fetched the source page)
scope
厚生年金 contribution rate (employer + employee, 被保険者負担 9.15%); 国民年金 第1号被保険者 monthly premium (付加保険料 400円 not included); 老齢基礎年金 full amount for one person with 40 years of contributions, paid from the April 2026 instalment (6月15日支払分).
hash
sha256:a25a713cf1d5d1b69856451912fbab373ef60443401b0551e68e202a40a166e0
signature
EdDSA, key db-2026-10 — keys

As JSON

curl -s https://databutler.dev/f/jp/pension/kosei-nenkin-rate?max_age=30d — schema; verify with npx verified-facts verify https://databutler.dev/f/jp/pension/kosei-nenkin-rate

{
  "protocol": "verified-facts/0.3",
  "key": "jp/pension/kosei-nenkin-rate",
  "label": "Employees' pension insurance (kosei nenkin, 厚生年金) contribution rate, employer + employee combined (fixed since September 2017)",
  "value": 18.3,
  "unit": "% of standard remuneration (employer + employee)",
  "period": null,
  "effectiveFrom": "2017-09-01",
  "effectiveTo": null,
  "source": "https://www.nenkin.go.jp/service/kounen/hokenryo/ryogaku/ryogakuhyo/index.html",
  "quote": "平成29年9月を最後に引上げが終了し、厚生年金保険料率は18.3％で固定",
  "verifiedDate": "2026-10-24",
  "nextScheduledRefresh": "2026-11-28",
  "changeCadence": "annual",
  "nextExpectedChange": "2027-04-01",
  "sourceCheckedAt": "2026-11-02",
  "status": "fresh",
  "ageDays": 13,
  "maxAgeDays": null,
  "scope": "厚生年金 contribution rate (employer + employee, 被保険者負担 9.15%); 国民年金 第1号被保険者 monthly premium (付加保険料 400円 not included); 老齢基礎年金 full amount for one person with 40 years of contributions, paid from the April 2026 instalment (6月15日支払分).",
  "hash": "sha256:a25a713cf1d5d1b69856451912fbab373ef60443401b0551e68e202a40a166e0",
  "signature": {
    "alg": "EdDSA",
    "kid": "db-2026-10",
    "jws": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRiLTIwMjYtMTAifQ..Zuh_FnWXWFk0josxKTmmJAxwi96XLhOEpYN_CPdd_TgwhXBS-PsVVObbXuNt2NiYHEoLpzrOAv7JB2vWp04yAA",
    "keys": "https://databutler.dev/.well-known/jwks.json"
  },
  "publisher": {
    "name": "Data Butler",
    "url": "https://databutler.dev/"
  },
  "cite": {
    "url": "https://databutler.dev/facts/jp/pension/kosei-nenkin-rate",
    "text": "databutler.dev, verified 2026-10-24 against https://www.nenkin.go.jp/service/kounen/hokenryo/ryogaku/ryogakuhyo/index.html"
  }
}