What are fiscal partners in the Netherlands and how can it reduce your tax bill?

Fiscal partnership (fiscaal partnerschap) in the Netherlands allows two people to allocate certain income and deductions between them in the most tax-efficient way. Partners can choose how to divide Box 3 assets, jointly held property, deductions, and some other income items in whatever proportion minimises their combined tax.

Fiscal partners include married couples, registered partners, and cohabiting couples who meet specific conditions (registered at same address, notarised cohabitation agreement, or a joint child, among others). The arrangement is automatically applied to married couples and registered partners.

The main tax benefit comes from reallocating deductions or assets to whichever partner can use them more efficiently. For example, if one partner has no income and the other has high income, Box 3 wealth can be fully allocated to the lower-income partner (who has more unused heffingvrij vermogen), reducing the taxable base. Mortgage interest deductions can also be allocated to the higher-earning partner for maximum relief.

Heffingskortingen (tax credits) can sometimes be transferred between partners if one partner does not have enough tax to use them. This is particularly relevant for the inkomensafhankelijke combinatiekorting and the algemene heffingskorting.