Japan Retirement Tax Calculator (2026)

How to Use This Calculator

1. Enter your years of service — how long you actually worked at the company, in whole years. Since even a single extra day counts as a full additional year under Japan’s rules, round up if you’re unsure (e.g., 9 years and 3 months of service → enter 10).
2. Enter your retirement payout — the total lump-sum amount you received (or will receive) from your employer, in Japanese yen.
3. Click Calculate to see the full breakdown appear below: retirement income deduction → taxable amount → income tax → special reconstruction tax → resident tax → take-home amount.
4. Try different numbers to compare scenarios — for example, retiring early versus staying until a later date.

How the Tax Is Actually Calculated

Japan’s retirement income tax is structured so that the longer you’ve worked and the smaller your payout, the lighter your tax burden.
The calculation happens in five steps.

Step 1. Calculate the Retirement Income Deduction

The deduction you’re entitled to depends entirely on your years of service.

• 20 years or less: JPY 400,000 × years of service (with a minimum of JPY 800,000)
• Over 20 years: JPY 8,000,000 + JPY 700,000 × (years of service − 20)

For example, 10 years of service gives a deduction of JPY 4,000,000 (JPY 400,000 × 10), while 25 years gives JPY 8,000,000 + JPY 700,000 × 5 = JPY 11,500,000.
The longer you’ve worked, the larger your deduction — meaning longer-tenured employees get proportionally more tax relief.

Step 2. Calculate the Taxable Amount

Only half (1/2) of the payout remaining after the deduction is actually subject to tax. This “half-taxation” rule is the key mechanism that makes Japan’s retirement income tax noticeably lighter than ordinary income tax.

Taxable amount = (Payout − Retirement income deduction) × 1/2

However, the 1/2 rule does not apply in full if your service period is 5 years or less. This is worth checking carefully, since many foreign residents work in Japan for only three to five years before leaving.

• Short-term retirement payment (5 years or less, not an officer) — the portion above JPY 3 million after the deduction is not halved. Only the first JPY 3 million gets the 1/2 treatment.
• Specified officer retirement payment (company officer with 5 years or less) — the 1/2 rule does not apply at all.

For example, with 3 years of service and a JPY 10 million payout, applying the 1/2 rule across the board gives roughly JPY 900,000 in tax, while the correct rules give roughly JPY 1,790,000 — nearly double. (Source: National Tax Agency No.1420)

Step 3. Income Tax (Progressive Rates)

The taxable amount from Step 2 is run through the progressive income tax bracket table below. As with most progressive systems, higher brackets apply a higher rate only to the portion of income within that bracket.

Formula: Income tax = Taxable amount × rate − deduction

Step 4. Special Reconstruction Income Tax (2.1%)

Introduced in 2013 to help fund recovery from the Great East Japan Earthquake, this surtax adds an extra 2.1% of your income tax amount and remains in effect through 2037.

Step 5. Resident Tax (Approximately 10%)

Resident tax on the taxable amount is split into a municipal tax (6%) and a prefectural tax (4%), for a combined total of roughly 10%.
This calculator uses a simplified flat 10% rate and does not account for municipality-specific adjustment deductions.

Final Step: Take-Home Amount

Take-home amount = Payout − (Income tax + Special reconstruction tax + Resident tax)

For more background and worked examples, see our full guide: How Japan Taxes Your Retirement Payout (Taishokukin) →

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