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Japan Overtime Pay Calculator
Japanese labour law sets minimum premium rates for overtime, late-night and holiday work. Enter your salary and hours to estimate the overtime pay you are legally owed — and check it against your payslip.
Inputs
Base + role allowances. Family / commuting / housing allowances can be excluded.
Annual scheduled hours ÷ 12. Typically around 160.
Beyond 8 h/day or 40 h/week. Over 60 h is paid at +50%.
Adds a 25% premium on top.
Work on the legal weekly day off. +35%.
Overtime pay breakdown
Total / month
58,613JPY
Base hourly wage
1,563JPY
| Item | Hours | Rate | Amount |
|---|---|---|---|
| Overtime (first 60 h/month) | 30 h | ×1.25 | 58,613 |
| Overtime (over 60 h/month) | 0 h | ×1.5 | 0 |
| Late-night premium (extra) | 0 h | +25% | 0 |
| Statutory holiday work | 0 h | ×1.35 | 0 |
- Annualised (×12)
- 703,356 JPY
Estimate only. The base wage may exclude family/commuting/housing allowances and bonuses, and a fixed-overtime (minashi zangyo) clause can change the result. Hours beyond the fixed allotment must still be paid separately.
Premium rates (legal minimums)
- Overtime (beyond 8 h/day or 40 h/week): +25% (×1.25)
- Overtime above 60 h/month: +50% (applies to SMEs too since April 2023)
- Late-night work (22:00–05:00): +25% on top of the base/overtime rate
- Statutory holiday work (your legal weekly day off): +35%
- Late-night × overtime = +50%; late-night × holiday = +60%
How the base hourly wage is derived
For monthly-salary workers, the base hourly wage = monthly base pay ÷ average scheduled work hours per month. Average scheduled hours = (365 − annual days off) × daily scheduled hours ÷ 12. Family, commuting, housing, and similar allowances can be excluded from the base used for overtime.
FAQ
- Q. My contract says “fixed overtime included.” Can I still claim more?
- Yes. A fixed-overtime (minashi zangyo) allowance only covers a set number of hours. Any hours beyond that must be paid separately. The clause is also only valid if the fixed portion is clearly separated from base pay and the number of covered hours is stated.
- Q. Is overtime taxed differently?
- No. Overtime pay is ordinary wage income — subject to the same social insurance and withholding income tax as base salary. Note that overtime in April–June raises your “standard monthly remuneration,” which sets your social-insurance premiums for the following year.
- Q. What if my employer won’t pay?
- Keep records (time cards, PC logs, entry/exit logs). Unpaid wage claims have a statute of limitations of 3 years for now. You can consult the Labour Standards Inspection Office (Rodo Kijun Kantokusho), a lawyer, or a labour union.
This tool is an estimate. Late-night and holiday premiums are applied as separate surcharges on the hours you enter; actual pay depends on your contract, fixed-overtime clauses, and which allowances are excluded from the base wage. See the Japanese version for additional detail.