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Foreign self-employed professionals who want to do assignments in the Netherlands and businesses in the Netherlands that want to subcontract work to a foreign self-employed professional, must comply with the Act on the Employment of Aliens (Wet arbeid vreemdelingen, Wav). This Act contains various rules with regard to foreign self-employed professionals working in the Netherlands.
Self-employed professionals from EU, EEA or Switzerland
If you come from within the EU or the European Economic Area (EEA) or Switzerland, you do not require a work permit (tewerkstellingsvergunning, TWV) to be allowed to work as a self-employed professional in the Netherlands. This also applies to Croatians. You do, however, have to demonstrate that you are truly self-employed. Self-employed means for instance you are in control over certain aspects of the services you provide. This can be verified by the Social Affairs and Employment Inspectorate (Inspectie SZW).
Self-employed professionals from outside EU, EEA and Switzerland
Self-employed professionals from outside an EU, EEA member country and Switzerland do require a work permit to be allowed to work in the Netherlands. Their contractor must apply for this work permit for them from the Employee Insurance Agency (Uitvoeringsinstituut Werknemersverzekeringen, UWV). However, self-employed professionals in possession of a residence permit allowing residence for a self-employed professional or a residence permit including the endorsement 'Work is freely permitted' (Arbeid is vrij toegestaan) are exempt.