{"uid":"cap_i9jTU7S3QkfKaEb5ilPf9","slug":"mart402-japan-bonus-net-pay-calculator-f5c8ff6d","name":"Mart402 Japan Bonus Net Pay Calculator","description":"Japan bonus net pay: social insurance premiums and withholding tax from the official bonus rate table (needs previous-month salary). Deterministic, cited sources. $0.01/call.","url":"https://mart402.com/v1/jp-bonus-net?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"bonus_yen":{"type":"number"},"prefecture":{"type":"string"},"previous_month_after_si_yen":{"type":"number"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_kz-R1adbilr1A9fAa7938","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calculates net take-home pay for a Japanese bonus after deducting social insurance premiums and withholding tax using official bonus rate tables, given the previous month's post-SI salary.","exampleAgentPrompt":"I'm getting a ¥500,000 bonus this month in Tokyo — my previous month's salary after social insurance was ¥280,000. Can you work out how much I'll actually take home after social insurance premiums and withholding tax?","exampleUseCases":[{"title":"Employee bonus take-home estimate","prompt":"My company is paying me a ¥800,000 bonus and I'm based in Osaka. My take-home salary last month after social insurance was ¥320,000. What will my net bonus actually be after all the deductions?"},{"title":"Payroll agent bonus slip generation","prompt":"I need to generate a net pay figure for our employee's ¥350,000 bonus — she's in Kanagawa prefecture and her previous month's post-social-insurance salary was ¥245,000. What does she take home?"},{"title":"Bonus negotiation net impact check","prompt":"My employer offered me a ¥1,200,000 bonus and I live in Aichi. Last month I took home ¥410,000 after social insurance. How much of that bonus will actually land in my bank account?"}],"resultDescription":"Returns a deterministic breakdown of the bonus net pay: gross bonus, social insurance premium deductions (health insurance, pension, employment insurance), withholding tax computed from the official Japanese bonus rate table, and final net take-home amount — all in yen, with cited regulatory sources.","failureModes":["Missing required field bonus_yen or previous_month_after_si_yen returns validation error","Invalid or unrecognized prefecture string may cause lookup failure or fallback to default rate","Non-positive or zero bonus amount may return an error or zero-deduction result","Very large bonus amounts near edge cases of the rate table may produce unexpected bracket results","Network timeout or service unavailability returns HTTP 5xx"],"whenToPreferThis":"Use this endpoint when you need a deterministic, officially-sourced Japanese bonus net pay calculation for any prefecture. Prefer it over general payroll APIs when you specifically need Japanese bonus tax rules (not monthly salary), and over LLM-based estimates when you need exact, citable figures derived from official statutory tables.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:48:45.670Z","isFirstParty":false,"canonicalSlug":"mart402-japan-bonus-net-pay-calculator-f5c8ff6d"}