The United States is the largest single contributor to the United Nations, paying roughly 22% of the regular U.N. budget and about 27% of the peacekeeping budget, plus voluntary contributions to specialized agencies like UNICEF, WHO, UNHCR, and UNRWA. U.S. presidents have at times withheld funding from specific agencies or programs to press for reforms or in response to specific actions.
Recurring U.S. policy questions include peacekeeping costs and effectiveness, the structure of the Security Council and its permanent five (P5) veto, funding for agencies criticized for performance or perceived bias (UNESCO, UNRWA, Human Rights Council membership), and the relationship between U.N. agencies and rival powers, especially China.
Debates weigh the U.N.'s role as a forum for collective action, its limitations under great-power rivalry, the value of U.S. agenda-setting through funding leverage, and whether withholding contributions strengthens reform or merely cedes influence.