If you want to do an internship as part of your study programme in Holland, you can do this on the basis of your student visa.
The employer does not need to apply for a work permit for you. The employer must, however, be able to present an internship agreement to the Labour Inspectorate, upon request.
There is a standard internship agreement and employers are obliged to use this standard document. The internship agreement must be signed by you, the company providing the internship and the Dutch education institution where you are enrolled.
You are resident in Holland on the basis of a residence permit for the purpose of ‘study’. This residence permit remains valid while you are doing your internship. In other words, you do not need to apply for another residence permit.
Please note that you are only allowed to do an internship if you actually possess a pass-format residence permit. If your application for a residence permit or an extension of your residence permit is still being processed, you cannot begin the internship.
There are no rules about the salaries paid to interns or about how high internship pay should be. This is between you and the internship provider. If you get paid a salary for your internship, it does have consequences for your liability to pay tax, your social security status and your obligation to have health insurance.
As long as your pay is only a compensation for expenses, it will not be subject to taxation. Expenses include, for example, travel expenses. If any other form of payment is made, the internship provider must pay tax and social security contributions.
In that case you will need to take out a Dutch healthcare insurance policy as you will then come under the Dutch social security system.
If you do not receive an actual salary for the internship, you will still be covered under the insurance policy you use during your study programme.
There are several ways to find an internship. A very common method is through your university. Almost all universities have a dedicated desk where they can give you access to their database of internship opportunities.