Japan Residence Tax Calculator: Juminzei on Prior-Year Income
Work out the Japanese residence tax (juminzei) — the local tax of roughly 10% of prior-year taxable income paid to your prefecture and city/ward — and the income plus the tax for the year.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Residence tax (juminzei) | Income plus tax figure |
|---|---|---|
| 10% of ¥4,000,000 (¥400,000) | $400,000.00 | $4,400,000.00 |
| 10% of ¥2,500,000 | $250,000.00 | $2,750,000.00 |
| 10% of ¥6,000,000 | $600,000.00 | $6,600,000.00 |
| 10% of ¥10,000,000 | $1,000,000.00 | $11,000,000.00 |
How This Calculator Works
Enter your prior-year taxable income and the rate (10%). The calculator shows the residence tax due. Japanese residence tax is assessed each year on the previous year's income and paid from around June, either deducted monthly from salary (for employees) or in quarterly instalments (for the self-employed). A small per-capita fixed levy is added on top — not included here.
The Formula
Percentage Add-On
Rate is the tax or tip percentage applied to the amount
Worked Example
At 10% on ¥4,000,000 of prior-year taxable income, residence tax is ¥400,000 — roughly ¥33,000 a month. The juminzei (住民税) is Japan's main local tax on individuals, charged by your prefecture and city/ward. It has two parts: an income-based portion (shotokuwari) at a combined flat rate of about 10% (typically 6% city + 4% prefecture), and a small fixed per-capita levy (kintōwari) of around ¥5,000 a year. Crucially, it's calculated on last year's income — so a sharp drop in current income doesn't reduce this year's bill.
Key Insight
Residence tax is a defining quirk of the Japanese tax system, and its timing and structure matter for budgeting. Two-part structure: the income-based juminzei (shotokuwari) at roughly 10% (split into a city/ward portion around 6% and a prefectural portion around 4%, with small local variations) plus a small fixed annual per-capita levy (kintōwari) of about ¥5,000 — this calculator handles the 10% portion only. Crucially, it's based on prior-year income: you're assessed each year on the income you earned in the previous calendar year, with the tax bill arriving in June and paid either monthly through payroll deductions (special collection, the standard for company employees) from June to the following May, or in quarterly instalments (ordinary collection, for the self-employed and others). That timing has two important practical consequences: first, your first-year residence tax in Japan is generally zero — there was no prior-year Japan-source income to tax — so newcomers often get a 'free' first year; second, if your income drops sharply (after leaving a job, going freelance, or losing work), your residence tax bill is still based on last year's higher income, which can be a nasty cash-flow surprise, so set money aside for it. Deductions are similar to national income tax but not identical (the basic deduction is smaller), which is why the residence-tax taxable base is slightly different and the rate is a flat 10% rather than the national progressive scale. Two reduction mechanisms this calculator doesn't model are widely used: furusato nōzei (the hometown-tax donation programme), which converts a chunk of your residence-tax bill into donations to chosen localities in exchange for thank-you gifts, and various credits (housing loan, etc.). This calculator gives the 10% income-based juminzei on the prior-year income you enter; for an exact figure, use your residence-tax taxable base (which differs slightly from the national base), add the small per-capita levy, and apply furusato nōzei or other credits where applicable.
The deduction stack before 10% is applied
Residence tax is 10% of the taxable income figure, but 'taxable income' is reached only after a multi-step deduction stack that differs slightly from national income tax. Starting from gross income, the deductions are: employment income deduction (kyūyo shotoku kōjo, automatically applied for salaried workers — ranges from ¥550,000 minimum to ¥1.95M+ cap depending on salary), social insurance premiums paid (national pension, employees' health insurance, employment insurance — all fully deductible), the basic deduction for residence tax (¥430,000, lower than the ¥480,000 for national income tax), spouse/dependent deductions (¥330,000 per dependent for residence tax, again slightly lower than national), and any iDeCo or small-business mutual aid contributions.
Concrete example for a salaried worker on ¥5,000,000 gross salary: employment income deduction ≈ ¥1,440,000, social insurance premiums ≈ ¥725,000, basic deduction ¥430,000. Taxable income for residence tax = 5,000,000 − 1,440,000 − 725,000 − 430,000 = ¥2,405,000. Residence tax = 2,405,000 × 10% = ¥240,500 income portion + ¥5,000 per-capita levy = ¥245,500 for the year, about ¥20,460/month deducted from salary.
If gross income (in cash, not after employment income deduction) is ¥980,000 or less for the year, no residence tax is owed — the threshold below which the income portion is fully exempt.
The prior-year base trap: what to do when income drops
Residence tax is assessed in June each year on the previous calendar year's income, then deducted in 12 instalments from June through May of the following year. This timing creates well-known traps for income transitions.
First year in Japan: typically zero residence tax, since there's no prior Japan-source income to assess. This makes Year 2 of life in Japan the residence-tax shock year for new arrivals — budget for it.
Sharp income drop (job loss, sabbatical, going freelance with lower invoices): your residence tax bill for the year stays based on the prior year's higher income, while your current income is lower. Set aside the equivalent of last year's residence tax during higher-earning years to absorb this. For severe cases, municipal tax offices can grant deferrals or instalment reductions on hardship grounds.
Leaving Japan mid-year: residence tax for the year you depart is still owed on the prior-year income unless you arrange a tax agent (nōzei kanrinin) to settle it post-departure. Skipping this exposes you to administrative collection actions and may affect future re-entry.
Furusato nōzei: legally reducing your juminzei
The 'hometown tax' programme lets you donate to any municipality of your choice and receive most of the donation back as a residence-tax credit, minus a ¥2,000 out-of-pocket. In return, donating municipalities send 'thank-you gifts' (返礼品) — typically local produce, sake, beef, fruit, electronics — worth roughly 30% of the donation by official rules.
Donation cap is income-dependent: very roughly, for a salaried worker the cap is around 20% of the year's residence-tax assessment, with a precise formula based on income, dependents, and other deductions. For a ¥5M-salary single person, the typical safe cap is around ¥60,000–70,000/year of donations. Online calculators on platforms like Furusato Choice or Satofuru estimate your personal cap.
Two procedural paths: the One-Stop Exception System (lets up to 5 municipalities settle the credit administratively — only available to salaried workers who file no final tax return) and the tax return method (deduct via the annual tax return). The first is simpler; the second is required if you have more than 5 donations or already file a return for other reasons. Net cost is always ¥2,000 total regardless of donation amount within the cap — making furusato nōzei essentially free local produce in exchange for shifting where your tax goes.
Juminzei (income portion) at typical taxable incomes
10% of taxable income (after deductions). The fixed per-capita levy (kintōwari) of around ¥5,000/year is on top of this. Taxable income shown is AFTER the deduction stack — gross salary is materially higher.
| Taxable income (after deductions) | Juminzei income portion (10%) | Approx. monthly deduction |
|---|---|---|
| ¥1,000,000 | ¥100,000 | ¥8,333 |
| ¥2,500,000 | ¥250,000 | ¥20,833 |
| ¥4,000,000 | ¥400,000 | ¥33,333 |
| ¥6,000,000 | ¥600,000 | ¥50,000 |
| ¥8,000,000 | ¥800,000 | ¥66,667 |
Add roughly ¥5,000 per-capita levy on top. For salaried workers, deducted monthly from June through May (12 instalments). Self-employed pay in 4 quarterly instalments via tax-office notices.
Frequently Asked Questions
How is Japanese residence tax calculated?
Multiply your prior-year taxable income by about 10% (6% to the city/ward + 4% to the prefecture), then add a small fixed per-capita levy of around ¥5,000. On ¥4,000,000, the income portion is ¥400,000 — about ¥33,000 a month. This calculator shows the 10% income portion only.
What is juminzei?
Japan's main local tax on individuals, paid to your prefecture and city/ward. It has an income-based portion (roughly 10%) and a small fixed per-capita levy. Unlike national income tax, it's assessed on the previous calendar year's income and paid the following year from around June.
Why is my first year in Japan free of residence tax?
Because residence tax is based on the previous year's Japan-source income. If you didn't live or earn in Japan last year, there's nothing to be taxed on, so your first calendar year typically owes no residence tax. The bill arrives from June of the second year, based on your first year's income.
What if my income drops sharply?
Your residence tax bill won't drop with it — it's still based on the prior year's higher income, so a job loss or move to lower-paid work can leave you facing a large tax bill out of reduced current income. Setting money aside for residence tax during higher-earning years protects against this cash-flow risk.
Can I reduce my residence tax?
Yes — the most popular way is furusato nōzei (hometown tax), where donations to chosen municipalities are credited against your residence tax (minus a small ¥2,000 out-of-pocket) in exchange for thank-you gifts. Various credits (housing loan, medical expenses through national tax, etc.) also indirectly reduce the base.
References & Authoritative Sources
- Ministry of Internal Affairs and Communications (MIC) — Local taxes — overview of inhabitant tax (juminzei) · consulted May 31, 2026 · Government department overseeing local taxation framework
- National Tax Agency of Japan — Resident tax computation and deductions · consulted May 31, 2026 · Coordinates with prefectural/municipal authorities on assessment rules
- Local Tax Act (Chihō Zeihō) — Statutory basis for inhabitant tax rates and brackets · consulted May 31, 2026 · e-Gov — full statutory text including 4% prefectural + 6% municipal rates
Related Calculators
Methodology & Review
The residence tax is the standard rate applied to prior-year taxable income; the total here is the income plus the tax figure so the tax (chargeAmount) and net are easy to read off. It models the flat 10% income-based portion and does not add the small per-capita levy (kintōwari), the income-deduction differences from national income tax, or the furusato nōzei donation credit.
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