Japan Retirement Payout (退職金) Tax Calculator

Two ways, both very favorable. First, a retirement income deduction (退職所得控除) that grows with your years of service is subtracted from the payout before any tax applies, roughly ¥400,000 per year of service for the first 20 years (minimum ¥800,000), then ¥700,000 per year after that. Second, whatever remains after that deduction is HALVED before normal tax rates apply, the halving rule (2分の1課税). Together, these mean a large lump sum can be taxed far more lightly than the same amount paid as ordinary salary.

For 20 years of service or fewer: ¥400,000 x years of service, with a guaranteed minimum of ¥800,000 even for very short service. For more than 20 years: ¥8,000,000 plus ¥700,000 for every year beyond 20. So 15 years of service gives a ¥6,000,000 deduction, while 30 years gives ¥8,000,000 + (¥700,000 x 10) = ¥15,000,000. A partial year of service is rounded up to a full year.

It applies in full to the common case this calculator models: an employee (not a company officer/executive) with more than 5 years of service. Two exceptions exist for shorter tenures: a company officer or executive with 5 years of service or less loses the halving benefit entirely (特定役員退職手当等), and a regular employee with 5 years of service or less only keeps the halving benefit on the first ¥3,000,000 of post-deduction income, with anything above that taxed in full (短期退職手当等, effective since January 2022, introduced to curb a loophole around very short employment periods designed around large lump-sum payouts).

No, this is an important difference. Ordinary salary resident tax lags a full year, this year's bill is based on last year's income (see our Japan Resident Tax Calculator). Retirement income resident tax works differently: it's a flat 10% withheld directly at the time of payout, on the same halved taxable retirement income figure used for national income tax, with no per-capita levy. There's no year-long delay to plan around here.

It's intentionally structured that way, retirement income tax treatment in Japan is designed to reward long-tenure employment, historically the norm at large Japanese employers. Someone with 30 years of service gets a ¥15,000,000 tax-free deduction before halving even applies, versus ¥6,000,000 for 15 years, more than double for double the tenure, since the per-year rate itself increases after year 20. This is one of the reasons Japanese severance/retirement packages remain a meaningful part of long-term compensation planning.

If you submit a "Notification of Retirement Income Adjustment" (退職所得の受給に関する申告書) to your employer before the payout, they withhold the correctly calculated final tax automatically, no further filing needed for most people. If you don't submit it, your employer must withhold a flat 20.42% instead (a higher, non-final withholding rate), and you'd need to file a tax return afterward to claim back the difference. Always submit the form if your employer provides it.