Japan Bonus Tax and Net Bonus Calculator
Use the rate your payroll team or the NTA 2026 table gives for your prior-month salary and dependent count. The calculator applies that rate after bonus social insurance to estimate withholding and cash received.
Planning estimate only. The applicable rate must be confirmed from the NTA table, exceptional bonus formulas can apply, and final annual income tax is reconciled separately from this payroll withholding estimate.
Enter your scenario
Use the details that match your situation. Your estimate stays in this browser.
How this estimate works
- Subtract the social-insurance amount withheld from the gross bonus.
- Apply the user-confirmed NTA percentage to that remaining bonus and round down below one yen.
- Subtract both social insurance and estimated income-tax withholding to show the estimated net bonus.
Official sources
- National Tax Agency: 2026 withholding tax tables, including bonus percentages
- National Tax Agency: English withholding tax guide and forms
Rules and published amounts can change. Open the source pages and confirm the date and conditions before making a tax, payroll, benefits, pension, or investment decision.
Frequently asked questions
Why does this calculator ask for a withholding rate?
Japan's bonus rate depends on prior-month salary after social insurance and dependent count, so the safest simple calculator uses the rate confirmed from the official table.
Is bonus withholding the final tax?
No. It is payroll withholding. Year-end adjustment or a final return can reconcile annual income tax.