Heeswijk Castle is self-governing and largely financially independent. Its revenue is generated primarily from paying visitors to the castle and from venue rentals. To maintain the monument, the foundation receives limited subsidies from the province of North Brabant and the national government. To meet its objectives, the foundation charges admission fees to visitors based on the benefit principle. In this way, visitors contribute to the castle’s sustainable preservation. The Knights, friends, and patrons provide additional financial support.

The foundation is a nonprofit organization. Its RISN number is 802053142. Any operating surpluses are invested entirely in the castle. The Heeswijk Castle Foundation has been designated by the tax authorities as a Public Benefit Organization (ANBI). This provides tax benefits to donors who support Heeswijk Castle.

The foundation adheres to the Fair Practice Code, the Cultural Governance Code, and the Diversity & Inclusion Code.