Bonus Take-Home Pay in Japan: What's Deducted From a Bonus and How to Calculate It
Once your bonus amount is announced, what you really want to know is how much will land in your account. Social insurance premiums and income tax are deducted from bonuses in Japan, but resident tax is not. This guide shows in yen what is taken from a bonus and how much, gives take-home estimates by bonus size, and explains how the capped premiums work.
What's deducted from a bonus
A bonus statement has one fewer deduction line than your monthly payslip, because there's no resident tax line.
| Item | Charged on | Employee rate | Notes |
|---|---|---|---|
| Health insurance | Standard bonus amount | 4.955% (Tokyo) | Up to a cumulative ¥5.73 million per fiscal year |
| Long-term care insurance | Standard bonus amount | 0.795% | Ages 40–64 only |
| Employees' pension | Standard bonus amount | 9.15% | Up to ¥1.5 million per payment |
| Employment insurance | The bonus amount itself | 0.55% | No cap |
| Income tax | Amount after social insurance | Rate set by the previous month's pay | Settled in the year-end adjustment |
| Resident tax | — | — | Not deducted from bonuses |
The standard bonus amount is the bonus rounded down to the nearest ¥1,000. For a bonus of ¥503,500, social insurance is charged on ¥503,000. Only employment insurance is charged on the full amount without rounding.
Take-home estimates by bonus size
Figures for someone with an annual income of ¥5 million, under 40, working in Tokyo, with no dependents. Income tax uses the annual marginal rate (10% under these conditions).
| Gross bonus | Social insurance | Income tax | Take-home | Take-home rate |
|---|---|---|---|---|
| ¥200,000 | ¥29,310 | ¥17,427 | ¥153,263 | 76.6% |
| ¥300,000 | ¥43,965 | ¥26,141 | ¥229,894 | 76.6% |
| ¥500,000 | ¥73,275 | ¥43,568 | ¥383,157 | 76.6% |
| ¥800,000 | ¥117,240 | ¥69,709 | ¥613,051 | 76.6% |
| ¥1,000,000 | ¥146,550 | ¥87,137 | ¥766,313 | 76.6% |
Take-home pay from a bonus is roughly 75–80% of the gross, not very different from monthly pay. But because the income tax rate depends on your annual income, someone earning ¥8 million a year (20% rate) takes home only ¥339,588 (67.9%) from a ¥500,000 bonus. At ages 40–64, long-term care insurance of ¥3,975 is added, bringing take-home from a ¥500,000 bonus to ¥379,588.
Why resident tax isn't deducted
Resident tax in Japan is an annual amount fixed in advance based on the previous year's income, collected from monthly pay in 12 installments from June to the following May (special collection). There's no mechanism for adding extra in a bonus month, so bonus statements have no resident tax line.
Income tax, on the other hand, is charged when the income arises, so it's applied to each bonus. This difference is one reason the take-home rate on a bonus looks slightly higher than on monthly pay.
Note that the annual resident tax reflects your whole annual income, bonuses included. It just isn't deducted from the bonus itself — you're not exempt from it. The overall picture is covered in Income Tax vs Resident Tax.
Premiums have caps
Like monthly pay, social insurance on bonuses has upper limits.
- Employees' pension: capped at a standard bonus amount of ¥1.5 million per bonus. Even on a ¥2 million bonus, the pension premium stops at ¥137,250, the amount for ¥1.5 million.
- Health and long-term care insurance: capped at a cumulative ¥5.73 million per fiscal year (April 1 to March 31). No premium is charged on bonuses beyond that.
- Employment insurance: no cap; 0.55% is charged on the whole bonus.
Because of these caps, the bigger the bonus, the higher the take-home rate. For someone earning ¥8 million a year (20% rate), the take-home rate is 67.9% on a ¥500,000 bonus but 69.7% on ¥2 million — the gross is four times larger, but premiums are only 3.4 times larger.
The same annual income can give different take-home pay depending on the bonus share
Even at the same annual income, changing the split between monthly pay and bonuses changes social insurance. Here's ¥5 million a year, varying only the annual bonus total.
| Annual bonus total | Monthly pay (gross) | Social insurance (year) | Annual take-home |
|---|---|---|---|
| None | ¥416,667 | ¥721,460 | ¥3,914,540 |
| ¥500,000 | ¥375,000 | ¥741,212 | ¥3,898,788 |
| ¥1,000,000 | ¥333,333 | ¥744,034 | ¥3,896,566 |
| ¥1,500,000 | ¥291,667 | ¥746,854 | ¥3,894,146 |
| ¥2,000,000 | ¥250,000 | ¥749,676 | ¥3,891,924 |
The difference is only about ¥20,000 a year, but a higher bonus share leaves slightly less take-home pay. Even if lower monthly pay drops your standard monthly remuneration grade, the premiums on bonuses more than make up for it. When a job listing says “¥5 million a year (including bonuses)”, assuming a difference of about this size is enough.
Calculating bonus take-home pay with the tool
- 1
Enter your annual income on the “Annual income to take-home” tab
The income tax rate on a bonus depends on annual income, so enter that first.
- 2
Switch to the “Bonus take-home” tab
Enter this bonus amount to see the standard bonus amount and a breakdown of premiums and income tax.
- 3
Check the breakdown lines
Health insurance, long-term care insurance, employees' pension, employment insurance and income tax are listed, with resident tax shown as not deducted from bonuses. If a cap is reached, that's shown too.
For your overall annual take-home pay, see How to Calculate Take-Home Pay; for how the grades behind the premiums are decided, see How Social Insurance Premiums Are Calculated.
FAQ
- How much is the take-home pay from a ¥500,000 bonus?
- For an annual income of ¥5 million, under 40, in Tokyo with no dependents, it's ¥383,157 (76.6%). The breakdown is health insurance ¥24,775, employees' pension ¥45,750, employment insurance ¥2,750 and income tax ¥43,568. At ages 40–64, long-term care insurance of ¥3,975 is added for ¥379,588, and someone earning ¥8 million with a 20% income tax rate takes home ¥339,588.
- Why isn't resident tax deducted from a bonus?
- Because resident tax is an annual amount based on the previous year's income, collected from monthly pay in 12 installments from June to the following May, with no mechanism for adding extra in a bonus month. Income tax is charged when income arises, so it applies to bonuses. The annual resident tax still reflects your whole annual income including bonuses, so you're not exempt.
- What percentage of a bonus do you actually take home?
- Roughly 75–80%. Because the income tax rate depends on your annual income, it's about 76.6% at ¥5 million a year and about 67.9% at ¥8 million. The social insurance burden is nearly constant at about 14.7% (about 15.5% at ages 40–64) regardless of income, so the difference in take-home rate is almost entirely income tax.
- Is there a cap on social insurance for bonuses?
- Yes. Employees' pension is capped at a standard bonus amount of ¥1.5 million per bonus, so the employee share stops at ¥137,250. Health and long-term care insurance are capped at a cumulative ¥5.73 million per fiscal year (April to March). Employment insurance has no cap, with 0.55% charged on the whole bonus. As a result, the bigger the bonus, the higher the take-home rate.
- Why does the income tax on my statement differ from the tool's calculation?
- Withholding on bonuses uses a dedicated table that sets the rate from “the previous month's pay after social insurance” and your number of dependents, while the tool uses a rate derived from annual income. Monthly withholding is also an estimate, and both are settled in the year-end adjustment, so the annual totals match.
Tools in this article
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