This guide brings together the best practices of Swiss entrepreneurship that have made the Swiss economy a model of performance by developing a formidable business culture, one that attracts many foreign companies. In order to set up in Switzerland and develop a local structure, the entrepreneur can : -either create a new structure that must be adapted to the laws and regulations in force in the country, which will be the subject of the first 2 parts, -or buy out an existing local company, devoted in a 3rd part.