Is Your Overtime Pay Correct in Japan? A Practical Calculation and Record-Checking Guide

In Japan, staying after your scheduled finishing time does not always mean that every extra minute receives the same overtime premium. The key question is whether your hours exceed statutory working hours—generally eight hours per day or 40 hours per week—or fall into another premium category, such as late-night or statutory-holiday work.

This guide is for foreign employees, including full-time, part-time, fixed-term, and dispatched workers, who want to check a payslip or prepare for a discussion about unpaid overtime. The information reflects national rules available as of August 1, 2026, but individual calculations can change under flexible schedules, special exemptions, and company pay rules.

Quick guide:

• Statutory overtime normally carries a premium of at least 25%.
• Overtime beyond 60 hours in one month carries a premium of at least 50%.
• Work from 10 p.m. to 5 a.m. adds a late-night premium of at least 25%.
• Keep your own daily record and compare it with attendance data and each payslip.

First separate scheduled overtime from statutory overtime

Your employment schedule and Japan’s statutory limit are not necessarily the same line. This distinction explains many apparent differences between an employee’s calculation and a payslip.

Suppose your contract says that you work from 9 a.m. to 5:30 p.m., with a one-hour unpaid break. Your scheduled working time is 7.5 hours. If you work until 6 p.m., you have worked 30 minutes beyond your schedule, but your total is still only eight hours.

That 30-minute period may be paid at the ordinary hourly rate unless your employment contract or company rules promise a higher rate. Statutory overtime normally begins after you pass eight working hours that day.

The national starting points are:

• No more than eight working hours per day
• No more than 40 working hours per week
• At least one statutory day off per week, or four statutory days off over four weeks

Some workplaces with fewer than 10 regular workers in specified sectors can use a 44-hour weekly limit. Flexible working-hour systems can also change how hours are counted across a day, week, month, or longer settlement period.

Do not assume that the word overtime on an internal schedule has exactly the same meaning as statutory overtime under the Labor Standards Act.

The minimum premium rates

The applicable rate depends on when you worked and which legal limit you crossed. A company may offer higher rates, but it generally cannot replace the statutory minimum with a lower contractual rate.

Premiums can overlap. Statutory overtime performed between 10 p.m. and 5 a.m. normally combines the 25% overtime premium and the 25% late-night premium, producing a total multiplier of at least 1.50.

For overtime beyond 60 hours in a month during late-night hours, the combined multiplier is normally at least 1.75. Work on a statutory holiday during late-night hours normally produces at least 1.60.

A company holiday is not always a statutory holiday

A workplace with Saturday and Sunday off may designate only one of them as its statutory holiday. Working on the other day does not automatically trigger the 35% statutory-holiday premium.

Instead, those hours may become statutory weekly overtime if they push the employee beyond the applicable weekly limit. Check the work rules or ask payroll which day is designated as the statutory holiday.

The 60-hour rule now covers small and medium-sized employers

Since April 1, 2023, the minimum 50% premium for monthly statutory overtime beyond 60 hours has also applied to small and medium-sized enterprises. As of August 1, 2026, this is not a large-company-only rule.

ここがポイント: Count the hours first, classify them second, and apply the rate last. A single total labeled “overtime” can hide ordinary extra hours, statutory overtime, late-night work, and statutory-holiday work.

How to estimate your overtime pay

A useful first estimate is the hourly calculation base multiplied by the applicable rate and qualifying hours. The basic formula is:

Hourly calculation base × premium-inclusive multiplier × qualifying hours

For an hourly employee, the starting figure is usually straightforward. For a monthly salaried employee, the employer generally converts eligible monthly wages into an hourly amount using the average scheduled working hours per month under the applicable rules.

Example: monthly salary and ordinary statutory overtime

Assume the following simplified case:

• Eligible monthly wages: ¥300,000
• Average scheduled working hours per month: 160
• Statutory overtime worked: 10 hours
• Applicable multiplier: 1.25

The estimated hourly calculation base is:

¥300,000 ÷ 160 = ¥1,875

The estimated overtime payment is:

¥1,875 × 1.25 × 10 = ¥23,437.50

The employer’s lawful rounding method may affect the final yen amount.

Example: overtime that continues after 10 p.m.

Using the same ¥1,875 hourly base, suppose five of the statutory overtime hours were worked between 10 p.m. and 5 a.m. Those five hours would normally use a combined multiplier of at least 1.50:

¥1,875 × 1.50 × 5 = ¥14,062.50

The remaining five daytime overtime hours would use at least 1.25:

¥1,875 × 1.25 × 5 = ¥11,718.75

The estimated total is ¥25,781.25 before permitted rounding. Splitting the hours by category matters; applying 1.25 to all 10 hours would miss the late-night premium.

Which allowances enter the calculation base?

Do not automatically divide only the amount labeled “basic salary.” Many regular allowances may need to be included.

The law identifies limited categories that can be excluded, including qualifying:

• Family allowances
• Commuting allowances
• Separation allowances
• Child education allowances
• Housing allowances
• Extraordinary payments
• Wages paid for periods longer than one month

The name on a payslip is not decisive. For example, a payment called a housing allowance may not qualify for exclusion if it is really a uniform payment unrelated to the employee’s actual housing circumstances. Bonuses and other payment structures also require separate checking.

For that reason, an online calculation based only on total monthly salary can provide an estimate but not always the legally correct amount.

Records to collect before checking a payslip

A reliable check needs both the company’s documents and your own daily timeline. Begin collecting records before a disagreement becomes serious.

Employment and company documents

Keep copies of:

• Your written notice of working conditions or employment contract
• Work rules and wage rules
• Shift schedules and calendars
• Any fixed-overtime agreement
• Notices about flexible, variable, or discretionary working-hour systems
• Documents identifying the wage closing date and payment date

Japanese payslips often use terms such as 時間外 (jikan-gai, overtime), 深夜 (shin’ya, late night), and 休日 (kyūjitsu, holiday work). Confirm whether the number beside each term shows hours, a payment, or both.

Daily evidence of actual working time

Record the start time, end time, and actual break time for every working day. Useful supporting material can include:

• Time-clock or attendance-system records
• Computer login and logout records
• Work emails and business-chat timestamps
• Building entry records
• Shift-change messages
• Approved overtime requests
• Business travel or assignment records

Keep the material lawfully. Do not copy confidential customer data, trade secrets, or unrelated personal information merely to prove working time.

Employer records matter too. Wage ledgers generally include working hours and hours of overtime, holiday work, and late-night work. Current law sets a five-year preservation period for important labor records, with a three-year period applying for the time being.

A five-step monthly check

Rebuild the month day by day instead of checking only the final overtime payment. This method makes it easier to locate the source of a mismatch.

1. Confirm the payroll period. A payslip may cover the previous month or a mid-month-to-mid-month period.
2. Calculate actual working time. Subtract only genuine breaks when you were free from work duties.
3. Compare actual hours with the applicable schedule. Check for variable schedules, flex time, paid leave, absences, and overnight shifts.
4. Separate each premium category. List ordinary extra hours, statutory overtime, overtime beyond 60 hours, late-night hours, and statutory-holiday hours.
5. Compare hours and money separately. A correct-looking payment total can still hide an incorrect hour count or calculation base.

A simple personal log can use these columns:

• Date
• Scheduled start and finish
• Actual start and finish
• Actual break
• Total working time
• Time beyond the schedule
• Statutory overtime
• Late-night time
• Statutory-holiday time
• Evidence or note

Reconcile this log every month. Waiting until the end of the year makes missing messages, changed schedules, and forgotten breaks much harder to reconstruct.

Common reasons the amount looks wrong

Most discrepancies come from classification, missing time, or an unclear pay arrangement. Check these points before deciding that the payslip is correct or incorrect.

Breaks that were not real breaks

Time is not necessarily a break just because the schedule labels it that way. If you had to answer calls, watch a counter, wait for instructions at a required location, or remain ready to work, the period may need closer examination as working time.

Keep a factual note of what duties you performed and who required them. The legal result depends on the employer’s control over that time, not simply on whether you ate a meal.

Overtime that was not approved in advance

A company can require advance approval, and employees should normally follow that process. However, the absence of a form does not by itself settle whether time was working time.

If a supervisor instructed, knew of, or effectively required the work, preserve the related messages and tasks. Avoid remaining at work for personal reasons and later counting that time as overtime.

Fixed overtime included in salary

A salary may include a fixed overtime payment, sometimes called minashi zangyō or a fixed overtime allowance. This does not normally mean unlimited overtime without additional pay.

Check whether the documents clearly identify:

• The amount treated as fixed overtime pay
• The number and type of hours it covers
• The ordinary salary separated from that allowance
• Payment of any difference when actual qualifying overtime exceeds the included amount

If the wording is unclear, ask payroll for a written explanation of the hours, rates, and calculation base used.

“Manager” written beside your job title

A title such as manager, shop manager, or team leader does not automatically remove overtime rights. The legal exemption for managers and supervisors is assessed using actual authority, responsibility, freedom over working time, and treatment, rather than the English or Japanese title alone.

A person who genuinely falls within the exemption may not receive ordinary overtime or statutory-holiday premiums. The late-night premium can still apply. This is a fact-sensitive area in which official advice can be particularly useful.

Annual salary or remote work

An annual salary does not automatically include all overtime. Working from home also does not automatically make working time unrecordable.

The real questions remain: What working-hour system lawfully applies? What time was under the employer’s direction? Which wages form the calculation base? What does the written agreement say?

Flexible schedules and other exceptions

The simple daily formula is only a screening tool when a special working-hour system applies. Ask for the name and settlement period of the system before making a final calculation.

Examples include:

• A one-month or one-year variable working-hours system
• Flex time with a defined settlement period
• Discretionary working systems for eligible duties
• Special rules for certain small workplaces
• Exemptions for qualifying managers and supervisors
• Sector-specific arrangements or exceptions

These systems do not give an employer a general right to ignore working hours or premiums. They change which hours cross the statutory threshold or how those hours are measured.

A separate issue is the Article 36 agreement, commonly called a saburoku kyōtei. An employer generally needs this labor-management agreement before requiring work beyond statutory hours or on statutory holidays. The existence of an agreement does not cancel the duty to pay applicable premiums, and payment does not by itself make excessive overtime lawful.

Your nationality or status of residence does not normally create a lower overtime rate. Japan’s labor standards protections apply to foreign workers, although immigration rules may separately restrict whether a person may work and what work they may perform. Students and dependents with permission for activities outside their status should check those immigration limits separately from wage calculations.

What to do when your calculation does not match

Start with a written request for the underlying figures, then escalate if the explanation does not resolve the gap. Keep the conversation specific and neutral.

Ask payroll or human resources to confirm:

• The payroll period
• Recorded working hours for each day
• Statutory overtime, late-night, and holiday hours
• The designated statutory holiday
• The hourly calculation base and included allowances
• The premium rates used
• Any fixed overtime already included in salary
• Rounding or carry-forward treatment

You might write:

I am checking my payslip for the period from [date] to [date]. My record shows [number] statutory overtime hours and [number] late-night hours. Could you please provide the recorded hours, hourly calculation base, premium rates, and fixed-overtime amount used for this payslip?

Save the question and response. If records differ, identify particular dates rather than arguing only about the monthly total.

If the issue remains unresolved, foreign-language consultation services are available through the Ministry of Health, Labour and Welfare. The ministry’s national consultation directory lists current languages, hours, and telephone numbers. The Labour Standards Advice Hotline also handles questions about illegal or unpaid overtime outside ordinary government-office hours.

A consultation service can explain general rules and direct you to an appropriate Labour Standards Inspection Office. A hotline adviser does not necessarily investigate or issue orders to an employer, so ask what next step fits your case.

Practical takeaways

The most important habit is to compare hours every pay period, not merely compare this month’s net salary with last month’s. Taxes, insurance deductions, and attendance adjustments can change take-home pay even when the overtime calculation is unchanged.

For your next payslip:

• Confirm the wage period and scheduled hours.
• Separate statutory overtime from time merely beyond your shift.
• Mark all work between 10 p.m. and 5 a.m.
• Identify which weekly day is the statutory holiday.
• Check whether regular allowances were omitted from the calculation base.
• Ask what any fixed overtime payment covers.
• Preserve your daily log and supporting records.

If the numbers still do not reconcile, the next useful step is not another rough calculator. It is a date-by-date comparison with payroll, followed by an official labor consultation if the employer cannot explain the difference.

参照リンク

• Ministry of Health, Labour and Welfare: Information on Labor Standards for Foreign Workers
• Tokyo Employment Consultation Center: Key Points of Japanese Labor Law
• Ministry of Health, Labour and Welfare: Overtime, Holiday Work and Premium Wages
• Ministry of Health, Labour and Welfare: April 2023 Change to the Premium Rate for Overtime Beyond 60 Hours
• Ministry of Health, Labour and Welfare: Consultation Services for Foreign Workers
• Ministry of Health, Labour and Welfare: Labour Standards Advice Hotline