In Switzerland, it's important to distinguish between sectors with and without legally binding collective labor agreements (CLAs) or standard employment contracts with mandatory minimum wages.
Mandatory Minimum Wages: Must be adhered to in sectors with binding CLAs. Bipartite commissions ensure compliance by both domestic and foreign companies. Wage rules can vary based on the employee's activity or professional experience.
Customary Wages: In sectors without mandatory minimum wages, the customary wage for the location, profession, or industry must be upheld.
You may utilize the "Calculate a Minimum Wage" tool on the following link : https://entsendung.admin.ch/cms/content/lohn/lohn_en to ascertain whether an occupation falls within the scope of CLA or a standard employment contract with mandatory minimum wages, and to determine the applicable minimum wage for your specific situation.
Given that Switzerland is a federal state, the authority to eventually set minimum wages is delegated to the Cantons, resulting in variations in minimum wage levels across different Cantons. It is advisable to ensure that the wage for the posted worker complies with the standards of the Canton where the work will be performed. If the work is to be carried out in multiple Cantons, it is recommended to set the minimum wage at the highest level among the Cantons involved.
Here are the contact details of the cantonal immigration and employment market authorities.
The Cantonal Tripartite Commissions are responsible for monitoring the Swiss labor market and have the authority to inspect both domestic and foreign companies. The standard employment contract applies directly to the employment relationships that it governs.The determination of customary wages falls exclusively within their jurisdiction.