The cross-border mobility of employees presents particular challenges for both employees and employers. Given the cross-border element, the parties involved are exposed to both the tax system of the host country and that one of the country of their residence. Therefore, proper understanding of the national tax law, the bilateral Double Taxation Avoidance Agreements and EU-Directives as well, is essential for the proper structuring of the employee's mobility, the rationalization of the tax obligations and the proper observance of compliance rules. Crowe Greece has all the necessary expertise and experience for the proper management and planning of the cross-border tax liabilities, in order to support the companies and the employees in their movement, either from abroad to Greece, or from Greece to another country. The application of best practices, concerns: