Since the UN’s inception in 1945, the U.S. has been its largest financial contributor. As a permanent member of the Security Council and host of UN Headquarters in New York City, the U.S. enjoys a significant amount of clout at the UN, and its leadership in providing financial support to the organization reflects that influence. Funding from Member States for the UN system comes from two main sources: assessed and voluntary contributions.
Assessed contributions are payments that all UN Member States are required to make under the UN Charter. These assessments provide a reliable source of funding to core functions of the UN Secretariat via the UN regular and peacekeeping budgets. In addition, UN specialized agencies have their own assessed budgets.