Netherlands - Passport & Nationality - Dutch Citizenship through Marriage
This applies where you are married to or are the registered partner of a Dutch man or woman.
If this is the case, the person can submit an application for naturalisation after 3 years of marriage or registered partnership and cohabitation. If the person has cohabited in the Netherlands with a Dutch man or woman (both partners unmarried) for an uninterrupted period of 3 years, an application may also be submitted. Note: this is true (in respect to marriage, partnership or cohabitation) if and only if in the last three years the applicant has continually lived together his/her partner inside the Netherlands. In case of marriage, it does not matter where this happened, i.e. inside and/or outside Dutch territories are both acceptable for married couples. As a rule of thumb, for each passed year, more than 6 months (per year) must have been spent under the same roof with that partner.