Outside work may affect working time, performance, competition and confidentiality. Restrictions must be assessed against legitimate employer interests and the specific activity.
Matching the contract to the work
The name of an arrangement does not settle its legal classification. Duties, working time, instructions, remuneration and workplace integration must be considered together. Special rules for students, trainees, marginal employment or young workers need their own assessment. A model chosen for administrative convenience must still fit the actual work.
Before starting or changing the arrangement, check dates, formal requirements and relevant application or response periods. Templates should reflect applicable collective agreements and workplace rules. Broad waiver or payment clauses may fail legal review. Statutory documentation duties and the conditions for a valid agreement are related but distinct issues.
Documents and practical implementation
Bring the current contract, amendments, a description of the role and the intended schedule. For special employment models, include relevant status evidence. Record how the arrangement will operate in payroll and personnel administration. Changes in actual practice can require a fresh legal assessment even where the original contract was carefully drafted.
Four practical examples
These illustrative situations highlight the issues to examine. The outcome depends on the agreement and the facts that can be established.
Example 1
An employee works evening shifts elsewhere. Consider combined working time and rest periods.
Example 2
A manager starts a competing business. Review competition duties and proportionate action.
Example 3
The contract requires approval for every activity. Check the clause and the grounds for refusing a request.
Example 4
A side activity continues during sick leave. Examine whether it conflicts with recovery rather than assuming all activity is prohibited.
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Deutsch · Reviewed on 13 November 2026.