If you are established in another EEA member state, you can arrange deals with customers from Croatia and fulfill these contracts directly, using your parent business.
Freedom to provide services applies to a broad segment of private market services, such as professional services, IT sector, creative industry, trade, construction, tourism, catering, real estate brokerage, private education, culture and social care services, various independent professions, as well as new business models.
Registration of a business establishment (a branch office, company, craft…) in Croatia is not required, as long as the work being done is of occasional or temporary nature and falls within the scope of service activities mentioned above.
The administrative obligations you have to fulfill are:
Obligations Regarding Employees and Labor Conditions
Sector Related Obligations