Jp Retirement Tax

{
  "as_of": null,
  "assumptions": [],
  "billable": true,
  "breakdown": [],
  "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": [
    "106万円の壁の2026年以降の要件見直し",
    "乙欄・丙欄",
    "住宅ローン控除以外の税額控除",
    "分離課税(株式・不動産譲渡)",
    "合計所得2350万円超の基礎控除逓減",
    "固定残業代の有効性判断",
    "変形労働時間制",
    "年の中途の年末調整",
    "従たる給与",
    "扶養手当等の企業independent基準",
    "日額表",
    "管理監督者の判定",
    "自治体独自の超過課税(横浜市・名古屋市等)",
    "裁量労働制",
    "非居住者・年の中途入退社の年調"
  ],
  "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": {
    "deduction_yen": 15000000,
    "half_taxation": true,
    "income_tax_yen": 155702,
    "net_yen": 19594298,
    "resident_tax_yen": 250000,
    "taxable_yen": 2500000
  },
  "rules_version": "2026.08.18",
  "sample": true,
  "sample_input": {
    "payout_yen": 20000000,
    "years_of_service": 30
  },
  "sources": [
    "https://www.nta.go.jp/publication/pamph/gensen/zeigakuhyo2026/data/17-18.pdf",
    "https://www.nta.go.jp/taxes/shiraberu/taxanswer/shotoku/2260.htm",
    "https://www.tax.metro.tokyo.lg.jp/kazei/kojin_ju.html"
  ],
  "summary": "退職金20,000,000円(勤続30年) -> 手取り19,594,298円(退職所得控除15,000,000円・所得税155,702円・住民税250,000円)",
  "tool": "jp-retirement-tax",
  "unverified_rules": []
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://mart402.com/v1/jp-retirement-tax' \
  -H 'content-type: application/json' \
  --data-raw '{"payout_yen":20000000,"years_of_service":30}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://mart402.com/v1/jp-retirement-tax' \
  -H 'content-type: application/json' \
  --data-raw '{"payout_yen":20000000,"years_of_service":30}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmart402.com%2Fv1%2Fjp-retirement-tax&method=POST
const res = await pay("https://mart402.com/v1/jp-retirement-tax", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "payout_yen": 20000000,
    "years_of_service": 30
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://mart402.com/v1/jp-retirement-tax",
        json={
            "payout_yen": 20000000,
            "years_of_service": 30,
        },
    )
    print(res.status_code, res.text)