Flextime in Japan: Settlement Periods, Shortfalls and Overtime Pay Examples

Start with the settlement period and agreed total

The settlement period is the unit over which hours are adjusted, with a maximum of three months. The arrangement requires work rules or equivalent provisions entrusting start and finish times to employees and a labor-management agreement setting matters including covered employees, the settlement period and total hours. An agreement for a period exceeding one month must also be filed.

Check the documents applying to you; employees at the same company do not necessarily have identical arrangements.

• Covered employees and departments, and the start date.
• Period length, starting point and time-record cutoff.
• Total hours you are required to work during the period.
• The standard working day used for annual-leave accounting.
• Core hours, flexible bands and how planned hours are shared.
• Treatment of shortfalls, excess hours, statutory overtime, night work and holiday work.

Sharing a schedule differs from the employer fixing daily start and finish times. If prior requests are required, establish whether they concern schedule notification, overtime authorization or another purpose.

Separate contractual hours from the statutory total

Exceeding the employer’s agreed total does not necessarily make every additional hour statutory overtime. Separate additional ordinary wages from statutory premiums.

Under the general 40-hour-week rule, the statutory total is 40 hours multiplied by calendar days in the settlement period, divided by seven. A 28-day period therefore gives 160 hours. Special treatment exists for eligible 44-hour-week workplaces and certain complete five-day-week arrangements, so check which rules apply.

Under a valid flextime arrangement, exceeding eight hours on one day is not automatically counted as daily overtime in the same way as under ordinary fixed hours. Daily time recording, breaks and health protection still matter. Our guide to ordinary statutory overtime explains the distinction.

A 28-day example: 150 versus 168 hours

Assume a one-month settlement period of 28 days under the general 40-hour-week rule, giving a statutory total of 160 hours. The contractual total is 140 hours, and the monthly salary covers those 140 hours. Assume that both the additional ordinary hourly rate and the premium-calculation base are ¥1,600.

There is no fixed overtime allowance, statutory holiday work, night work, annual leave or other leave, and no employer-specific extra premium. Statutory overtime is below 60 hours for the month, with a 25% premium used here.

For 168 hours, the 28 hours beyond the contractual total consist of 20 at the ordinary rate and eight including the premium. ¥48,000 is the total additional wage, not just the premium component.

For your own calculation, establish what the salary covers, the applicable wage base and any more favorable company provisions. Do not apply the example’s 140-hour total or rate without checking your terms.

Periods longer than one month also require monthly assessment

For a two- or three-month settlement period, the overall total is not the only test. Count hours exceeding a weekly average of 50 in each one-month segment, then hours exceeding the statutory total over the full period, without double counting.

The premium for hours exceeding the monthly-segment 50-hour weekly average must be paid on the payday corresponding to that segment. A shorter final month cannot cancel all excessive work in the first month.

An Article 36 agreement and overtime limits are also relevant. Check statutory holiday and night-work premiums separately. Ask payroll to distinguish overtime already determined for a month from the amount settled at the end of the period.

Keep shortfalls and annual leave separate

Possible shortfall treatments include carrying hours into the next period within that period’s statutory total or wage settlement under applicable pay rules. Carryover is not automatically unlimited. Check the reason and the rules, and do not automatically classify time lost because of the employer as an employee-caused shortfall.

Conversely, excess hours already worked cannot simply be carried into the next settlement period without paying the wages due. Excesses and shortfalls are not symmetrical.

For a full day of annual paid leave, wage settlement includes the agreement’s standard working-day hours. Keep actual work separate from leave credits and do not confuse the two when assessing premiums.

What to ask when a payslip is unclear

For example: “My actual work this month was 168 hours. Could you confirm my settlement period, contractual total and statutory total? Where can I see the additional ordinary wages and the hours attracting a premium?”

Compare the labor-management agreement and work rules, daily time records, leave records and payslip. Our guide to contractual working hours and monthly calculations provides related context.

Frequently asked questions

Does flextime eliminate overtime pay?

No. Check the statutory overtime calculation for the settlement period, night and statutory holiday work, and employer pay provisions.

Can I make up a shortfall through next month’s overtime?

Do not decide this alone. Check carryover rules and the next period’s statutory total. Shorter work later cannot erase premium wages already owed.

Read flextime records by establishing the applicable period and both contractual and statutory totals as well as daily attendance.

_{Sources: MHLW: flextime implementation guide / MHLW: definition of flextime / MHLW: excess hours and shortfalls / MHLW: overtime assessment for periods over one month}