Japanese Tax Calculators (Free, No Sign-up)
A set of free tools to quickly estimate income tax, residence tax, the Furusato Nozei cap, and the tax on retirement allowances right in your browser. The values you enter are never sent anywhere and are calculated only on your own device. Please use them as rough guides only (the exact tax depends on the deductions that apply to you). If you want a precise calculation that factors in household composition, social insurance premiums and deductions, try the detailed simulation.
1. Quick income tax (taxable income → income tax)
An accurate calculation based on the National Tax Agency's "income tax quick-reference table." The "taxable income" you enter is the amount left after subtracting the various deductions (basic deduction, social insurance premium deduction, dependent deduction, etc.) from your income. The result includes the special reconstruction income tax (2.1%).
2. Rough residence tax
Residence tax is the "income-based portion (about 10% of taxable income) + the per-capita portion (standard of about ¥5,000, including the forest environment tax)." Because the taxable income base for residence tax is slightly smaller than for income tax, this is a rough estimate using the same taxable income. The per-capita amount varies somewhat by municipality.
3. Furusato Nozei deduction cap (guide)
A guide to the maximum you can donate while keeping your own out-of-pocket cost at ¥2,000. It is calculated from your taxable income, using roughly 20% of the income-based portion of residence tax as the benchmark. Because the real cap changes with social insurance premiums, other deductions and household composition, please also check the official simulator on each Furusato Nozei site before donating.
4. Tax on a retirement allowance (retirement income)
For a retirement allowance, "(retirement allowance − retirement income deduction) × 1/2" is the taxable amount (retirement income). The retirement income deduction is ¥400,000 × years for 20 years of service or less, and ¥8,000,000 + ¥700,000 × (years − 20) for more than 20 years (minimum ¥800,000). Assuming the "report concerning receipt of retirement income" has been filed, this estimates income tax (including the reconstruction tax) + residence tax of 10%.
5. Rough take-home pay from annual salary (employees)
A rough estimate of take-home pay for an employee (salaried worker), after subtracting social insurance premiums, income tax and residence tax from gross annual salary. It assumes single, no dependents, no other deductions, and calculates social insurance premiums at about 15% of annual salary (in reality this varies by your coverage and municipality). Please use it as a rough guide only.
6. Gift tax (calendar-year taxation)
Tax applies to the total gifts you received during one year, minus the ¥1.1 million basic deduction. The special tax rate = gifts from lineal ascendants (parents, grandparents) to a child or grandchild aged 18 or over; the general tax rate = everything else. Calculated using the National Tax Agency's quick-reference table.
※ These tools are rough estimates for general information only and are not tax advice. The actual tax varies with income deductions, tax credits, your municipality and various special measures. For exact figures, please check the National Tax Agency's "tax return preparation corner," your local tax office, or a licensed tax accountant. The income tax quick-reference table is based on the system as of June 2026.
How to find your "taxable income"
Most of the tools on this page ask for taxable income, not annual salary. Entering your salary instead will inflate the tax by two or three times. It takes thirty seconds to find on documents you already have, so check it first.
| Your situation | Document to look at | Where to look |
|---|---|---|
| Employee or part-timer | Withholding slip | "Amount after employment income deduction" minus "total income deductions" (rounded down to the nearest ¥1,000) |
| Sole proprietor | Tax return, first page | It is stated directly as "taxable income amount" (box 30) |
| Pension recipient | Withholding slip for public pensions | Payments less the public pension deduction and income deductions. The detailed version is more reliable here |
| No documents yet | — | Use the detailed simulator, which works back from annual salary, family situation and social insurance |
A rough guide (employee, single, no other deductions)
On a salary of ¥3m, taxable income is somewhere in the low ¥1m range; on ¥5m, the low ¥2m range; on ¥7m, around ¥3.5m. Dependants, life insurance premiums and iDeCo push it lower still. "Roughly 40% of salary" is one rule of thumb, but the real figure varies enormously between people — always confirm it on your withholding slip.
Which tool should I use?
| What you want to know | Tool |
|---|---|
| This year's income tax | 1. Income tax quick calculation |
| The residence tax withheld from next June | 2. Residence tax rough calculation |
| How much Furusato Nozei you can do | 3. Furusato Nozei limit (also run a portal's official estimate before donating) |
| Tax on a retirement payment | 4. Tax on retirement allowances |
| Take-home pay from a salary figure | 5. Take-home estimate, or the detailed version |
| Whether a gift from a parent is taxable | 6. Gift tax calculation |
| Whether you can stay within a dependant threshold | Dependant threshold simulator |
| Whether incorporating would pay | Micro-corporation simulator |
| Which health insurance to take after leaving a job | Post-employment health insurance simulator |
Every simulator is listed on the simulator index. They can also be embedded in a blog or internal document.
Frequently asked questions
Are the numbers I enter saved anywhere?
They are neither saved nor transmitted. Every calculation happens inside your own browser; there is no code here that sends values to a server. Close the page and nothing remains.
The result does not match my actual tax
These tools calculate from the taxable income you enter and nothing else. They do not reflect tax credits such as the housing loan credit, separate taxation on dividends and shares, municipality-specific per-capita levies, or the adjustment credit. To include family situation and social insurance, use the detailed simulator; for a definitive figure, use the National Tax Agency's filing site.
Can I use the same taxable income for the residence tax tool?
Strictly speaking, no. Residence tax has smaller deductions — a basic deduction of ¥430,000 against ¥580,000 for income tax — so taxable income for residence tax is typically about ¥150,000 higher. This tool will therefore understate it slightly. Your exact amount appears on the residence tax determination notice each June.
Can I trust the Furusato Nozei limit shown here?
Treat it as a guide. The real limit is driven by your residence tax income levy and shifts with social insurance, dependants and the housing loan credit. Anything above the limit is money you simply lose, so staying within 80–90% of the figure shown is the safe approach. Our complete guide to Furusato Nozei explains the mechanics.
Related pages
- Detailed simulator (take-home from salary, family situation and social insurance)
- How residence tax works and is calculated
- Complete guide to Furusato Nozei / Tax on retirement allowances
- Tax basics (what taxable income is; how deductions work)
- Simulator index (dependant thresholds, high-cost medical care, incorporating)
