How long and how often can you work night shifts?

1. When does a shift qualify as a night shift?

The general definition asks whether you work more than one hour between midnight and 06:00. The name used by the employer is not decisive: an “early shift” can qualify, while a shift ending just after midnight may not. Record actual tasks and breaks within that period. Pay definitions may use different times and must be checked separately.

Separate working time from time spent on site. A real break can reduce work within a shift, but required availability may change the assessment. On-site standby and on-call duties can involve special rules. Ask what is recorded as working time for statutory protection and why, rather than relying only on the paid-hours figure in a payslip.

2. Check the length of each night shift

Article 5:8 of the Working Hours Act generally limits night shifts to ten hours of work. Twelve hours on site cannot be assessed from its label alone: examine actual work, genuine breaks and the duty type. Required handover or closing tasks can extend actual working time beyond the schedule. This can change whether the length limit is met.

The general rules allow limited extension to twelve hours: no more than five times in each consecutive fourteen-times-24-hour period and no more than 22 times in each consecutive 52-week period. At least twelve hours of uninterrupted rest must follow. The conditions operate together. Remaining annual capacity does not allow the shorter-period limit to be ignored.

3. Count late-ending night shifts separately

The general frequency limit is 36 night shifts ending after 02:00 in every sixteen consecutive weeks. This is more precise than simply saying “36 nights”. An earlier-ending night shift may count when assessing average weekly hours without entering this particular late-ending count. Keep separate columns for qualifying night shifts and those ending after 02:00.

A permitted collective deviation can allow a different frequency within statutory boundaries: no more than 140 such shifts over 52 consecutive weeks, or no more than 38 hours of work between midnight and 06:00 over two consecutive weeks. These are alternative statutory routes, not automatically cumulative conditions. Ask which collective rule is being used and whether the conditions for using it are satisfied.

4. Collective agreements can deviate only within permitted limits

Ask for the CAO name, effective dates and specific article. A company arrangement can qualify as a collective arrangement under conditions, but a private agreement with one employee is not automatically equivalent. It must apply to the employer and tasks. A CAO may also provide stricter limits or additional protection, so statutory permission does not answer the entire contractual question.

Saying that healthcare, logistics or hospitality always have exceptions is insufficient. A sector can contain different duty types and agreements. Record which exception applies to which limit. A permitted deviation in the number of nights does not itself remove rest rules or occupational health duties. Have overlapping provisions checked before treating the entire schedule as authorised.

5. Calculate average hours over sixteen weeks

If a sixteen-consecutive-week period contains sixteen or more night shifts, the general maximum is an average of forty working hours per week over that period. All relevant work counts, including day shifts. Adding only night hours understates the total. With fewer than sixteen night shifts, general weekly and average limits remain relevant, including the 48-hour average over sixteen weeks.

Divide the total relevant working time by sixteen for an initial calculation, then check individual shifts, weekly limits and rest separately. Statutory counting rules can include certain hours not actually worked, such as sickness or holiday. Do not simply enter zero for absence weeks to bring the average below the limit. A borderline case needs the full record checked.

6. Examine sequences and rolling periods

Where a sequence contains at least one night shift, the general maximum is seven consecutive shifts. Day shifts within the sequence count too. A collective arrangement can allow eight under statutory conditions. Three or more consecutive night shifts also trigger a longer rest requirement afterwards. Read rest after night shifts for that separate calculation.

The periods are consecutive periods. A new payslip month or calendar year does not automatically reset a counter. Keep schedules before and after the disputed week. Regular night work may require 52 weeks of records to assess an annual exception. One busy-week screenshot can reveal a particular issue but cannot establish every longer-period average.

7. Include another job and additional tasks

If you work days for one employer and nights for another, combined working time and rest must be assessed. Provide both employers with the information needed for compliance in good time. Do not wait for an incident before disclosing the other schedule. Cross-border work or combinations of different regimes can particularly require specialist assessment.

Record required meetings, training and closing tasks where they may count as work. Keep ordinary commuting separate; it is not automatically working time. Whether an activity counts for statutory protection and how it must be paid are separate legal questions. For payment disputes, also consult the guides on overtime and pay.

8. Permanent night work needs its own assessment

Working exclusively or structurally only at night cannot be justified simply by saying you prefer it. There is a separate exemption route through the Labour Authority, with conditions including particularly exceptional personal circumstances. Specific exceptions also exist. The exemption and actual work arrangements must correspond to one another.

Ask whether a valid exemption or statutory exception exists, whom it covers and what conditions attach to it. Permission for an individual is not blanket approval for an entire department. Occupational health and safety duties also remain relevant. If symptoms develop, occupational physician assessment can still be necessary.

9. Raise a suspected excess with a reproducible calculation

Send dates, actual hours and the rule you think applies. Ask which CAO or sector provision the employer uses and request a timely adjustment where needed. Distinguish a longer-period calculation from an immediate scheduling concern. This enables a specific reply instead of a general statement about contracted hours.

Use your calculation as an evidence-based question, rather than an automatic medical or legal conclusion. Safety can need attention even before a numerical breach is established. Read reporting unsafe night work for escalation. Threatened wage loss or dismissal needs separate advice; missing a shift without explanation can intensify the dispute.

Practical checklist

• Record work between midnight and 06:00 and exact finishing times.
• Separate real breaks from required availability.
• Check the ten-hour limit and every condition for twelve-hour extension.
• Count all night shifts and late-ending night shifts separately.
• Calculate relevant total hours over sixteen consecutive weeks.
• Check collective deviations and work for other employers.
• Keep the calculation and written request for clarification.