Japan Salary Calculator

Most Japanese employment contracts split annual compensation into 12 monthly base salary payments plus a summer bonus (typically paid around June/July) and a winter bonus (typically paid around December). For tech roles, those two bonuses together are often worth 2-6 months of base salary. So a ¥8,000,000 annual offer might be structured as roughly ¥571,000/month x 14 payments (12 monthly + 2 bonus months), not ¥666,667/month evenly. Use the "Monthly base + bonus" mode in the calculator above to model this explicitly.

Resident tax (住民税) is calculated on your PREVIOUS calendar year's income, not your current salary. If you start working in Japan partway through a year, or you're in your first full calendar year of employment, you'll owe little or no resident tax until the following June, when the tax office catches up based on what you actually earned. This surprises a lot of newcomers, since the ~10% resident tax line only fully appears on payslips starting in year two. This calculator shows the steady-state resident tax you'll pay once that catch-up happens, not your artificially low first-year figure.

It's a standard deduction applied to gross salary before tax, unique to salaried employees, that scales down as a percentage the more you earn. For gross income up to ¥3,600,000 the deduction is ¥80,000 plus 30% of gross (minimum ¥650,000); it steps down through 20%, then 10%, and is capped at a flat ¥1,950,000 for gross above ¥8,500,000. It's separate from, and larger than, the basic deduction.

A 2.1% surtax added on top of your calculated national income tax (not on your income directly), introduced after the 2011 Tohoku earthquake and tsunami to fund reconstruction. It's legislated to run through 2037 and is still in effect for the 2026 tax year, though 2026 tax reform proposals could eventually restructure it into a lower reconstruction rate plus a separate defence-related tax from 2027 onward.

Four employee-side premiums: health insurance (健康保険, ~4.9%), employees' pension insurance (厚生年金保険, 9.15%), employment insurance (雇用保険, 0.5%), and — only if you're aged 40-64 — nursing care insurance (介護保険, ~0.8%). Health and pension premiums are capped once your monthly salary passes a ceiling, so very high earners pay a lower effective social insurance rate.

It uses Tokyo Kyokai Kenpo (協会けんぽ) rates as a representative default, since Tokyo is the most common reference point and rates only vary slightly (typically well under half a percentage point) by prefecture and health insurance union. If your employer uses a different kenpo (health insurance union), your health insurance line may differ marginally.