Jp Bonus Net

Last 30 days

Uptime

100%

Response time

409 ms typical, 540 ms slowest 5%

Last check

1 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://mart402.com/v1/jp-bonus-net" \
  -H "content-type: application/json" \
  -d '{"bonus_yen":800000,"prefecture":"tokyo","previous_month_after_si_yen":300000}'

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmart402.com%2Fv1%2Fjp-bonus-net
const res = await pay("https://mart402.com/v1/jp-bonus-net", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"bonus_yen":800000,"prefecture":"tokyo","previous_month_after_si_yen":300000}),
});
console.log(await res.json());

Example input

{
  "bonus_yen": 800000,
  "prefecture": "tokyo",
  "previous_month_after_si_yen": 300000
}

Example output

{
  "as_of": "2026-08-21",
  "assumptions": [],
  "billable": true,
  "breakdown": [
    {
      "_carried_forward": [],
      "child_care_support_yen": 920,
      "employment_insurance_yen": 4000,
      "health_base_yen": 800000,
      "health_yen": 39400,
      "long_term_care_yen": 0,
      "pension_base_yen": 800000,
      "pension_yen": 73200,
      "standard_bonus_yen": 800000,
      "total_yen": 117520
    }
  ],
  "carried_forward": [],
  "disclaimer": "仮定条件に基づく概算試算。税務相談・手続代行・法律相談ではない。申告・届出への使用不可。確定額は官公署または税理士・社会保険労務士等に確認のこと。",
  "not_covered": [
    "labor insurance の業種別特例(建設・農林以外)",
    "乙欄・丙欄",
    "健康保険組合(協会けんぽ以外)",
    "厚生年金基金・企業年金",
    "国民健康保険・国民年金",
    "年の中途の年末調整",
    "従たる給与",
    "日額表",
    "産休育休免除・随時改定(月変)・定時決定の細目"
  ],
  "note": "SAMPLE RESPONSE generated by the exact deterministic engine that serves production (jp-statutory has no LLM: same input always produces this byte-identical result, carrying the same rules_version and cited primary sources). Served free at /samples/{product} so you can verify the response shape, the rules_version field and the source citations before paying. No payment was taken. The sample_input shown is the catalog example input that produced this output.",
  "ok": true,
  "result": {
    "_carried_forward": [],
    "bonus_yen": 800000,
    "child_care_support_yen": 920,
    "employment_insurance_yen": 4000,
    "health_base_yen": 800000,
    "health_yen": 39400,
    "income_tax_unavailable": null,
    "income_tax_yen": 41808,
    "long_term_care_yen": 0,
    "net_yen": 640672,
    "pension_base_yen": 800000,
    "pension_yen": 73200,
    "social_insurance_yen": 117520,
    "standard_bonus_yen": 800000,
    "taxable_base_yen": 682480,
    "total_yen": 117520,
    "withholding_rate_percent": 6.126
  },
  "rules_version": "2026.08.18",
  "sample": true,
  "sample_input": {
    "bonus_yen": 800000,
    "prefecture": "tokyo",
    "previous_month_after_si_yen": 300000
  },
  "sources": [
    "https://jsite.mhlw.go.jp/yamanashi-roudoukyoku/koyouhoken_R8.html",
    "https://www.kyoukaikenpo.or.jp/about/business/insurance_rate/rate_prefectures/r08/index.html",
    "https://www.kyoukaikenpo.or.jp/assets/R8_13tokyo.pdf",
    "https://www.nenkin.go.jp/service/kounen/hokenryo/ryogaku/ryogakuhyo/20200825.files/R08ryougaku.pdf",
    "https://www.nta.go.jp/publication/pamph/gensen/zeigakuhyo2026/data/15-16.pdf"
  ],
  "summary": "賞与800,000円 -> 手取り640,672円(社会保険117,520円・源泉所得税41,808円/率6.126%)",
  "tool": "jp-bonus-net",
  "unverified_rules": []
}

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